editor_tests.rs

    1use super::*;
    2use crate::{
    3    JoinLines,
    4    scroll::scroll_amount::ScrollAmount,
    5    test::{
    6        assert_text_with_selections, build_editor,
    7        editor_lsp_test_context::{EditorLspTestContext, git_commit_lang},
    8        editor_test_context::EditorTestContext,
    9        select_ranges,
   10    },
   11};
   12use buffer_diff::{BufferDiff, DiffHunkSecondaryStatus, DiffHunkStatus, DiffHunkStatusKind};
   13use futures::StreamExt;
   14use gpui::{
   15    BackgroundExecutor, SemanticVersion, TestAppContext, UpdateGlobal, VisualTestContext,
   16    WindowBounds, WindowOptions, div,
   17};
   18use indoc::indoc;
   19use language::{
   20    BracketPairConfig,
   21    Capability::ReadWrite,
   22    FakeLspAdapter, LanguageConfig, LanguageConfigOverride, LanguageMatcher, LanguageName,
   23    Override, Point,
   24    language_settings::{
   25        AllLanguageSettings, AllLanguageSettingsContent, CompletionSettings,
   26        LanguageSettingsContent, LspInsertMode, PrettierSettings,
   27    },
   28};
   29use language_settings::{Formatter, FormatterList, IndentGuideSettings};
   30use lsp::CompletionParams;
   31use multi_buffer::{IndentGuide, PathKey};
   32use parking_lot::Mutex;
   33use pretty_assertions::{assert_eq, assert_ne};
   34use project::{
   35    FakeFs,
   36    debugger::breakpoint_store::{BreakpointState, SourceBreakpoint},
   37    project_settings::{LspSettings, ProjectSettings},
   38};
   39use serde_json::{self, json};
   40use std::{cell::RefCell, future::Future, rc::Rc, sync::atomic::AtomicBool, time::Instant};
   41use std::{
   42    iter,
   43    sync::atomic::{self, AtomicUsize},
   44};
   45use test::{build_editor_with_project, editor_lsp_test_context::rust_lang};
   46use text::ToPoint as _;
   47use unindent::Unindent;
   48use util::{
   49    assert_set_eq, path,
   50    test::{TextRangeMarker, marked_text_ranges, marked_text_ranges_by, sample_text},
   51    uri,
   52};
   53use workspace::{
   54    CloseAllItems, CloseInactiveItems, NavigationEntry, ViewId,
   55    item::{FollowEvent, FollowableItem, Item, ItemHandle},
   56};
   57
   58#[gpui::test]
   59fn test_edit_events(cx: &mut TestAppContext) {
   60    init_test(cx, |_| {});
   61
   62    let buffer = cx.new(|cx| {
   63        let mut buffer = language::Buffer::local("123456", cx);
   64        buffer.set_group_interval(Duration::from_secs(1));
   65        buffer
   66    });
   67
   68    let events = Rc::new(RefCell::new(Vec::new()));
   69    let editor1 = cx.add_window({
   70        let events = events.clone();
   71        |window, cx| {
   72            let entity = cx.entity().clone();
   73            cx.subscribe_in(
   74                &entity,
   75                window,
   76                move |_, _, event: &EditorEvent, _, _| match event {
   77                    EditorEvent::Edited { .. } => events.borrow_mut().push(("editor1", "edited")),
   78                    EditorEvent::BufferEdited => {
   79                        events.borrow_mut().push(("editor1", "buffer edited"))
   80                    }
   81                    _ => {}
   82                },
   83            )
   84            .detach();
   85            Editor::for_buffer(buffer.clone(), None, window, cx)
   86        }
   87    });
   88
   89    let editor2 = cx.add_window({
   90        let events = events.clone();
   91        |window, cx| {
   92            cx.subscribe_in(
   93                &cx.entity().clone(),
   94                window,
   95                move |_, _, event: &EditorEvent, _, _| match event {
   96                    EditorEvent::Edited { .. } => events.borrow_mut().push(("editor2", "edited")),
   97                    EditorEvent::BufferEdited => {
   98                        events.borrow_mut().push(("editor2", "buffer edited"))
   99                    }
  100                    _ => {}
  101                },
  102            )
  103            .detach();
  104            Editor::for_buffer(buffer.clone(), None, window, cx)
  105        }
  106    });
  107
  108    assert_eq!(mem::take(&mut *events.borrow_mut()), []);
  109
  110    // Mutating editor 1 will emit an `Edited` event only for that editor.
  111    _ = editor1.update(cx, |editor, window, cx| editor.insert("X", window, cx));
  112    assert_eq!(
  113        mem::take(&mut *events.borrow_mut()),
  114        [
  115            ("editor1", "edited"),
  116            ("editor1", "buffer edited"),
  117            ("editor2", "buffer edited"),
  118        ]
  119    );
  120
  121    // Mutating editor 2 will emit an `Edited` event only for that editor.
  122    _ = editor2.update(cx, |editor, window, cx| editor.delete(&Delete, window, cx));
  123    assert_eq!(
  124        mem::take(&mut *events.borrow_mut()),
  125        [
  126            ("editor2", "edited"),
  127            ("editor1", "buffer edited"),
  128            ("editor2", "buffer edited"),
  129        ]
  130    );
  131
  132    // Undoing on editor 1 will emit an `Edited` event only for that editor.
  133    _ = editor1.update(cx, |editor, window, cx| editor.undo(&Undo, window, cx));
  134    assert_eq!(
  135        mem::take(&mut *events.borrow_mut()),
  136        [
  137            ("editor1", "edited"),
  138            ("editor1", "buffer edited"),
  139            ("editor2", "buffer edited"),
  140        ]
  141    );
  142
  143    // Redoing on editor 1 will emit an `Edited` event only for that editor.
  144    _ = editor1.update(cx, |editor, window, cx| editor.redo(&Redo, window, cx));
  145    assert_eq!(
  146        mem::take(&mut *events.borrow_mut()),
  147        [
  148            ("editor1", "edited"),
  149            ("editor1", "buffer edited"),
  150            ("editor2", "buffer edited"),
  151        ]
  152    );
  153
  154    // Undoing on editor 2 will emit an `Edited` event only for that editor.
  155    _ = editor2.update(cx, |editor, window, cx| editor.undo(&Undo, window, cx));
  156    assert_eq!(
  157        mem::take(&mut *events.borrow_mut()),
  158        [
  159            ("editor2", "edited"),
  160            ("editor1", "buffer edited"),
  161            ("editor2", "buffer edited"),
  162        ]
  163    );
  164
  165    // Redoing on editor 2 will emit an `Edited` event only for that editor.
  166    _ = editor2.update(cx, |editor, window, cx| editor.redo(&Redo, window, cx));
  167    assert_eq!(
  168        mem::take(&mut *events.borrow_mut()),
  169        [
  170            ("editor2", "edited"),
  171            ("editor1", "buffer edited"),
  172            ("editor2", "buffer edited"),
  173        ]
  174    );
  175
  176    // No event is emitted when the mutation is a no-op.
  177    _ = editor2.update(cx, |editor, window, cx| {
  178        editor.change_selections(None, window, cx, |s| s.select_ranges([0..0]));
  179
  180        editor.backspace(&Backspace, window, cx);
  181    });
  182    assert_eq!(mem::take(&mut *events.borrow_mut()), []);
  183}
  184
  185#[gpui::test]
  186fn test_undo_redo_with_selection_restoration(cx: &mut TestAppContext) {
  187    init_test(cx, |_| {});
  188
  189    let mut now = Instant::now();
  190    let group_interval = Duration::from_millis(1);
  191    let buffer = cx.new(|cx| {
  192        let mut buf = language::Buffer::local("123456", cx);
  193        buf.set_group_interval(group_interval);
  194        buf
  195    });
  196    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
  197    let editor = cx.add_window(|window, cx| build_editor(buffer.clone(), window, cx));
  198
  199    _ = editor.update(cx, |editor, window, cx| {
  200        editor.start_transaction_at(now, window, cx);
  201        editor.change_selections(None, window, cx, |s| s.select_ranges([2..4]));
  202
  203        editor.insert("cd", window, cx);
  204        editor.end_transaction_at(now, cx);
  205        assert_eq!(editor.text(cx), "12cd56");
  206        assert_eq!(editor.selections.ranges(cx), vec![4..4]);
  207
  208        editor.start_transaction_at(now, window, cx);
  209        editor.change_selections(None, window, cx, |s| s.select_ranges([4..5]));
  210        editor.insert("e", window, cx);
  211        editor.end_transaction_at(now, cx);
  212        assert_eq!(editor.text(cx), "12cde6");
  213        assert_eq!(editor.selections.ranges(cx), vec![5..5]);
  214
  215        now += group_interval + Duration::from_millis(1);
  216        editor.change_selections(None, window, cx, |s| s.select_ranges([2..2]));
  217
  218        // Simulate an edit in another editor
  219        buffer.update(cx, |buffer, cx| {
  220            buffer.start_transaction_at(now, cx);
  221            buffer.edit([(0..1, "a")], None, cx);
  222            buffer.edit([(1..1, "b")], None, cx);
  223            buffer.end_transaction_at(now, cx);
  224        });
  225
  226        assert_eq!(editor.text(cx), "ab2cde6");
  227        assert_eq!(editor.selections.ranges(cx), vec![3..3]);
  228
  229        // Last transaction happened past the group interval in a different editor.
  230        // Undo it individually and don't restore selections.
  231        editor.undo(&Undo, window, cx);
  232        assert_eq!(editor.text(cx), "12cde6");
  233        assert_eq!(editor.selections.ranges(cx), vec![2..2]);
  234
  235        // First two transactions happened within the group interval in this editor.
  236        // Undo them together and restore selections.
  237        editor.undo(&Undo, window, cx);
  238        editor.undo(&Undo, window, cx); // Undo stack is empty here, so this is a no-op.
  239        assert_eq!(editor.text(cx), "123456");
  240        assert_eq!(editor.selections.ranges(cx), vec![0..0]);
  241
  242        // Redo the first two transactions together.
  243        editor.redo(&Redo, window, cx);
  244        assert_eq!(editor.text(cx), "12cde6");
  245        assert_eq!(editor.selections.ranges(cx), vec![5..5]);
  246
  247        // Redo the last transaction on its own.
  248        editor.redo(&Redo, window, cx);
  249        assert_eq!(editor.text(cx), "ab2cde6");
  250        assert_eq!(editor.selections.ranges(cx), vec![6..6]);
  251
  252        // Test empty transactions.
  253        editor.start_transaction_at(now, window, cx);
  254        editor.end_transaction_at(now, cx);
  255        editor.undo(&Undo, window, cx);
  256        assert_eq!(editor.text(cx), "12cde6");
  257    });
  258}
  259
  260#[gpui::test]
  261fn test_ime_composition(cx: &mut TestAppContext) {
  262    init_test(cx, |_| {});
  263
  264    let buffer = cx.new(|cx| {
  265        let mut buffer = language::Buffer::local("abcde", cx);
  266        // Ensure automatic grouping doesn't occur.
  267        buffer.set_group_interval(Duration::ZERO);
  268        buffer
  269    });
  270
  271    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
  272    cx.add_window(|window, cx| {
  273        let mut editor = build_editor(buffer.clone(), window, cx);
  274
  275        // Start a new IME composition.
  276        editor.replace_and_mark_text_in_range(Some(0..1), "à", None, window, cx);
  277        editor.replace_and_mark_text_in_range(Some(0..1), "á", None, window, cx);
  278        editor.replace_and_mark_text_in_range(Some(0..1), "ä", None, window, cx);
  279        assert_eq!(editor.text(cx), "äbcde");
  280        assert_eq!(
  281            editor.marked_text_ranges(cx),
  282            Some(vec![OffsetUtf16(0)..OffsetUtf16(1)])
  283        );
  284
  285        // Finalize IME composition.
  286        editor.replace_text_in_range(None, "ā", window, cx);
  287        assert_eq!(editor.text(cx), "ābcde");
  288        assert_eq!(editor.marked_text_ranges(cx), None);
  289
  290        // IME composition edits are grouped and are undone/redone at once.
  291        editor.undo(&Default::default(), window, cx);
  292        assert_eq!(editor.text(cx), "abcde");
  293        assert_eq!(editor.marked_text_ranges(cx), None);
  294        editor.redo(&Default::default(), window, cx);
  295        assert_eq!(editor.text(cx), "ābcde");
  296        assert_eq!(editor.marked_text_ranges(cx), None);
  297
  298        // Start a new IME composition.
  299        editor.replace_and_mark_text_in_range(Some(0..1), "à", None, window, cx);
  300        assert_eq!(
  301            editor.marked_text_ranges(cx),
  302            Some(vec![OffsetUtf16(0)..OffsetUtf16(1)])
  303        );
  304
  305        // Undoing during an IME composition cancels it.
  306        editor.undo(&Default::default(), window, cx);
  307        assert_eq!(editor.text(cx), "ābcde");
  308        assert_eq!(editor.marked_text_ranges(cx), None);
  309
  310        // Start a new IME composition with an invalid marked range, ensuring it gets clipped.
  311        editor.replace_and_mark_text_in_range(Some(4..999), "è", None, window, cx);
  312        assert_eq!(editor.text(cx), "ābcdè");
  313        assert_eq!(
  314            editor.marked_text_ranges(cx),
  315            Some(vec![OffsetUtf16(4)..OffsetUtf16(5)])
  316        );
  317
  318        // Finalize IME composition with an invalid replacement range, ensuring it gets clipped.
  319        editor.replace_text_in_range(Some(4..999), "ę", window, cx);
  320        assert_eq!(editor.text(cx), "ābcdę");
  321        assert_eq!(editor.marked_text_ranges(cx), None);
  322
  323        // Start a new IME composition with multiple cursors.
  324        editor.change_selections(None, window, cx, |s| {
  325            s.select_ranges([
  326                OffsetUtf16(1)..OffsetUtf16(1),
  327                OffsetUtf16(3)..OffsetUtf16(3),
  328                OffsetUtf16(5)..OffsetUtf16(5),
  329            ])
  330        });
  331        editor.replace_and_mark_text_in_range(Some(4..5), "XYZ", None, window, cx);
  332        assert_eq!(editor.text(cx), "XYZbXYZdXYZ");
  333        assert_eq!(
  334            editor.marked_text_ranges(cx),
  335            Some(vec![
  336                OffsetUtf16(0)..OffsetUtf16(3),
  337                OffsetUtf16(4)..OffsetUtf16(7),
  338                OffsetUtf16(8)..OffsetUtf16(11)
  339            ])
  340        );
  341
  342        // Ensure the newly-marked range gets treated as relative to the previously-marked ranges.
  343        editor.replace_and_mark_text_in_range(Some(1..2), "1", None, window, cx);
  344        assert_eq!(editor.text(cx), "X1ZbX1ZdX1Z");
  345        assert_eq!(
  346            editor.marked_text_ranges(cx),
  347            Some(vec![
  348                OffsetUtf16(1)..OffsetUtf16(2),
  349                OffsetUtf16(5)..OffsetUtf16(6),
  350                OffsetUtf16(9)..OffsetUtf16(10)
  351            ])
  352        );
  353
  354        // Finalize IME composition with multiple cursors.
  355        editor.replace_text_in_range(Some(9..10), "2", window, cx);
  356        assert_eq!(editor.text(cx), "X2ZbX2ZdX2Z");
  357        assert_eq!(editor.marked_text_ranges(cx), None);
  358
  359        editor
  360    });
  361}
  362
  363#[gpui::test]
  364fn test_selection_with_mouse(cx: &mut TestAppContext) {
  365    init_test(cx, |_| {});
  366
  367    let editor = cx.add_window(|window, cx| {
  368        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
  369        build_editor(buffer, window, cx)
  370    });
  371
  372    _ = editor.update(cx, |editor, window, cx| {
  373        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, window, cx);
  374    });
  375    assert_eq!(
  376        editor
  377            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  378            .unwrap(),
  379        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  380    );
  381
  382    _ = editor.update(cx, |editor, window, cx| {
  383        editor.update_selection(
  384            DisplayPoint::new(DisplayRow(3), 3),
  385            0,
  386            gpui::Point::<f32>::default(),
  387            window,
  388            cx,
  389        );
  390    });
  391
  392    assert_eq!(
  393        editor
  394            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  395            .unwrap(),
  396        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  397    );
  398
  399    _ = editor.update(cx, |editor, window, cx| {
  400        editor.update_selection(
  401            DisplayPoint::new(DisplayRow(1), 1),
  402            0,
  403            gpui::Point::<f32>::default(),
  404            window,
  405            cx,
  406        );
  407    });
  408
  409    assert_eq!(
  410        editor
  411            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  412            .unwrap(),
  413        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1)]
  414    );
  415
  416    _ = editor.update(cx, |editor, window, cx| {
  417        editor.end_selection(window, cx);
  418        editor.update_selection(
  419            DisplayPoint::new(DisplayRow(3), 3),
  420            0,
  421            gpui::Point::<f32>::default(),
  422            window,
  423            cx,
  424        );
  425    });
  426
  427    assert_eq!(
  428        editor
  429            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  430            .unwrap(),
  431        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1)]
  432    );
  433
  434    _ = editor.update(cx, |editor, window, cx| {
  435        editor.begin_selection(DisplayPoint::new(DisplayRow(3), 3), true, 1, window, cx);
  436        editor.update_selection(
  437            DisplayPoint::new(DisplayRow(0), 0),
  438            0,
  439            gpui::Point::<f32>::default(),
  440            window,
  441            cx,
  442        );
  443    });
  444
  445    assert_eq!(
  446        editor
  447            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  448            .unwrap(),
  449        [
  450            DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1),
  451            DisplayPoint::new(DisplayRow(3), 3)..DisplayPoint::new(DisplayRow(0), 0)
  452        ]
  453    );
  454
  455    _ = editor.update(cx, |editor, window, cx| {
  456        editor.end_selection(window, cx);
  457    });
  458
  459    assert_eq!(
  460        editor
  461            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  462            .unwrap(),
  463        [DisplayPoint::new(DisplayRow(3), 3)..DisplayPoint::new(DisplayRow(0), 0)]
  464    );
  465}
  466
  467#[gpui::test]
  468fn test_multiple_cursor_removal(cx: &mut TestAppContext) {
  469    init_test(cx, |_| {});
  470
  471    let editor = cx.add_window(|window, cx| {
  472        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
  473        build_editor(buffer, window, cx)
  474    });
  475
  476    _ = editor.update(cx, |editor, window, cx| {
  477        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 1), false, 1, window, cx);
  478    });
  479
  480    _ = editor.update(cx, |editor, window, cx| {
  481        editor.end_selection(window, cx);
  482    });
  483
  484    _ = editor.update(cx, |editor, window, cx| {
  485        editor.begin_selection(DisplayPoint::new(DisplayRow(3), 2), true, 1, window, cx);
  486    });
  487
  488    _ = editor.update(cx, |editor, window, cx| {
  489        editor.end_selection(window, cx);
  490    });
  491
  492    assert_eq!(
  493        editor
  494            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  495            .unwrap(),
  496        [
  497            DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
  498            DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)
  499        ]
  500    );
  501
  502    _ = editor.update(cx, |editor, window, cx| {
  503        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 1), true, 1, window, cx);
  504    });
  505
  506    _ = editor.update(cx, |editor, window, cx| {
  507        editor.end_selection(window, cx);
  508    });
  509
  510    assert_eq!(
  511        editor
  512            .update(cx, |editor, _, cx| editor.selections.display_ranges(cx))
  513            .unwrap(),
  514        [DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)]
  515    );
  516}
  517
  518#[gpui::test]
  519fn test_canceling_pending_selection(cx: &mut TestAppContext) {
  520    init_test(cx, |_| {});
  521
  522    let editor = cx.add_window(|window, cx| {
  523        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  524        build_editor(buffer, window, cx)
  525    });
  526
  527    _ = editor.update(cx, |editor, window, cx| {
  528        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, window, cx);
  529        assert_eq!(
  530            editor.selections.display_ranges(cx),
  531            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  532        );
  533    });
  534
  535    _ = editor.update(cx, |editor, window, cx| {
  536        editor.update_selection(
  537            DisplayPoint::new(DisplayRow(3), 3),
  538            0,
  539            gpui::Point::<f32>::default(),
  540            window,
  541            cx,
  542        );
  543        assert_eq!(
  544            editor.selections.display_ranges(cx),
  545            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  546        );
  547    });
  548
  549    _ = editor.update(cx, |editor, window, cx| {
  550        editor.cancel(&Cancel, window, cx);
  551        editor.update_selection(
  552            DisplayPoint::new(DisplayRow(1), 1),
  553            0,
  554            gpui::Point::<f32>::default(),
  555            window,
  556            cx,
  557        );
  558        assert_eq!(
  559            editor.selections.display_ranges(cx),
  560            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  561        );
  562    });
  563}
  564
  565#[gpui::test]
  566fn test_movement_actions_with_pending_selection(cx: &mut TestAppContext) {
  567    init_test(cx, |_| {});
  568
  569    let editor = cx.add_window(|window, cx| {
  570        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  571        build_editor(buffer, window, cx)
  572    });
  573
  574    _ = editor.update(cx, |editor, window, cx| {
  575        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, window, cx);
  576        assert_eq!(
  577            editor.selections.display_ranges(cx),
  578            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  579        );
  580
  581        editor.move_down(&Default::default(), window, cx);
  582        assert_eq!(
  583            editor.selections.display_ranges(cx),
  584            [DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)]
  585        );
  586
  587        editor.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, window, cx);
  588        assert_eq!(
  589            editor.selections.display_ranges(cx),
  590            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  591        );
  592
  593        editor.move_up(&Default::default(), window, cx);
  594        assert_eq!(
  595            editor.selections.display_ranges(cx),
  596            [DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2)]
  597        );
  598    });
  599}
  600
  601#[gpui::test]
  602fn test_clone(cx: &mut TestAppContext) {
  603    init_test(cx, |_| {});
  604
  605    let (text, selection_ranges) = marked_text_ranges(
  606        indoc! {"
  607            one
  608            two
  609            threeˇ
  610            four
  611            fiveˇ
  612        "},
  613        true,
  614    );
  615
  616    let editor = cx.add_window(|window, cx| {
  617        let buffer = MultiBuffer::build_simple(&text, cx);
  618        build_editor(buffer, window, cx)
  619    });
  620
  621    _ = editor.update(cx, |editor, window, cx| {
  622        editor.change_selections(None, window, cx, |s| {
  623            s.select_ranges(selection_ranges.clone())
  624        });
  625        editor.fold_creases(
  626            vec![
  627                Crease::simple(Point::new(1, 0)..Point::new(2, 0), FoldPlaceholder::test()),
  628                Crease::simple(Point::new(3, 0)..Point::new(4, 0), FoldPlaceholder::test()),
  629            ],
  630            true,
  631            window,
  632            cx,
  633        );
  634    });
  635
  636    let cloned_editor = editor
  637        .update(cx, |editor, _, cx| {
  638            cx.open_window(Default::default(), |window, cx| {
  639                cx.new(|cx| editor.clone(window, cx))
  640            })
  641        })
  642        .unwrap()
  643        .unwrap();
  644
  645    let snapshot = editor
  646        .update(cx, |e, window, cx| e.snapshot(window, cx))
  647        .unwrap();
  648    let cloned_snapshot = cloned_editor
  649        .update(cx, |e, window, cx| e.snapshot(window, cx))
  650        .unwrap();
  651
  652    assert_eq!(
  653        cloned_editor
  654            .update(cx, |e, _, cx| e.display_text(cx))
  655            .unwrap(),
  656        editor.update(cx, |e, _, cx| e.display_text(cx)).unwrap()
  657    );
  658    assert_eq!(
  659        cloned_snapshot
  660            .folds_in_range(0..text.len())
  661            .collect::<Vec<_>>(),
  662        snapshot.folds_in_range(0..text.len()).collect::<Vec<_>>(),
  663    );
  664    assert_set_eq!(
  665        cloned_editor
  666            .update(cx, |editor, _, cx| editor.selections.ranges::<Point>(cx))
  667            .unwrap(),
  668        editor
  669            .update(cx, |editor, _, cx| editor.selections.ranges(cx))
  670            .unwrap()
  671    );
  672    assert_set_eq!(
  673        cloned_editor
  674            .update(cx, |e, _window, cx| e.selections.display_ranges(cx))
  675            .unwrap(),
  676        editor
  677            .update(cx, |e, _, cx| e.selections.display_ranges(cx))
  678            .unwrap()
  679    );
  680}
  681
  682#[gpui::test]
  683async fn test_navigation_history(cx: &mut TestAppContext) {
  684    init_test(cx, |_| {});
  685
  686    use workspace::item::Item;
  687
  688    let fs = FakeFs::new(cx.executor());
  689    let project = Project::test(fs, [], cx).await;
  690    let workspace = cx.add_window(|window, cx| Workspace::test_new(project, window, cx));
  691    let pane = workspace
  692        .update(cx, |workspace, _, _| workspace.active_pane().clone())
  693        .unwrap();
  694
  695    _ = workspace.update(cx, |_v, window, cx| {
  696        cx.new(|cx| {
  697            let buffer = MultiBuffer::build_simple(&sample_text(300, 5, 'a'), cx);
  698            let mut editor = build_editor(buffer.clone(), window, cx);
  699            let handle = cx.entity();
  700            editor.set_nav_history(Some(pane.read(cx).nav_history_for_item(&handle)));
  701
  702            fn pop_history(editor: &mut Editor, cx: &mut App) -> Option<NavigationEntry> {
  703                editor.nav_history.as_mut().unwrap().pop_backward(cx)
  704            }
  705
  706            // Move the cursor a small distance.
  707            // Nothing is added to the navigation history.
  708            editor.change_selections(None, window, cx, |s| {
  709                s.select_display_ranges([
  710                    DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)
  711                ])
  712            });
  713            editor.change_selections(None, window, cx, |s| {
  714                s.select_display_ranges([
  715                    DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0)
  716                ])
  717            });
  718            assert!(pop_history(&mut editor, cx).is_none());
  719
  720            // Move the cursor a large distance.
  721            // The history can jump back to the previous position.
  722            editor.change_selections(None, window, cx, |s| {
  723                s.select_display_ranges([
  724                    DisplayPoint::new(DisplayRow(13), 0)..DisplayPoint::new(DisplayRow(13), 3)
  725                ])
  726            });
  727            let nav_entry = pop_history(&mut editor, cx).unwrap();
  728            editor.navigate(nav_entry.data.unwrap(), window, cx);
  729            assert_eq!(nav_entry.item.id(), cx.entity_id());
  730            assert_eq!(
  731                editor.selections.display_ranges(cx),
  732                &[DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0)]
  733            );
  734            assert!(pop_history(&mut editor, cx).is_none());
  735
  736            // Move the cursor a small distance via the mouse.
  737            // Nothing is added to the navigation history.
  738            editor.begin_selection(DisplayPoint::new(DisplayRow(5), 0), false, 1, window, cx);
  739            editor.end_selection(window, cx);
  740            assert_eq!(
  741                editor.selections.display_ranges(cx),
  742                &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 0)]
  743            );
  744            assert!(pop_history(&mut editor, cx).is_none());
  745
  746            // Move the cursor a large distance via the mouse.
  747            // The history can jump back to the previous position.
  748            editor.begin_selection(DisplayPoint::new(DisplayRow(15), 0), false, 1, window, cx);
  749            editor.end_selection(window, cx);
  750            assert_eq!(
  751                editor.selections.display_ranges(cx),
  752                &[DisplayPoint::new(DisplayRow(15), 0)..DisplayPoint::new(DisplayRow(15), 0)]
  753            );
  754            let nav_entry = pop_history(&mut editor, cx).unwrap();
  755            editor.navigate(nav_entry.data.unwrap(), window, cx);
  756            assert_eq!(nav_entry.item.id(), cx.entity_id());
  757            assert_eq!(
  758                editor.selections.display_ranges(cx),
  759                &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 0)]
  760            );
  761            assert!(pop_history(&mut editor, cx).is_none());
  762
  763            // Set scroll position to check later
  764            editor.set_scroll_position(gpui::Point::<f32>::new(5.5, 5.5), window, cx);
  765            let original_scroll_position = editor.scroll_manager.anchor();
  766
  767            // Jump to the end of the document and adjust scroll
  768            editor.move_to_end(&MoveToEnd, window, cx);
  769            editor.set_scroll_position(gpui::Point::<f32>::new(-2.5, -0.5), window, cx);
  770            assert_ne!(editor.scroll_manager.anchor(), original_scroll_position);
  771
  772            let nav_entry = pop_history(&mut editor, cx).unwrap();
  773            editor.navigate(nav_entry.data.unwrap(), window, cx);
  774            assert_eq!(editor.scroll_manager.anchor(), original_scroll_position);
  775
  776            // Ensure we don't panic when navigation data contains invalid anchors *and* points.
  777            let mut invalid_anchor = editor.scroll_manager.anchor().anchor;
  778            invalid_anchor.text_anchor.buffer_id = BufferId::new(999).ok();
  779            let invalid_point = Point::new(9999, 0);
  780            editor.navigate(
  781                Box::new(NavigationData {
  782                    cursor_anchor: invalid_anchor,
  783                    cursor_position: invalid_point,
  784                    scroll_anchor: ScrollAnchor {
  785                        anchor: invalid_anchor,
  786                        offset: Default::default(),
  787                    },
  788                    scroll_top_row: invalid_point.row,
  789                }),
  790                window,
  791                cx,
  792            );
  793            assert_eq!(
  794                editor.selections.display_ranges(cx),
  795                &[editor.max_point(cx)..editor.max_point(cx)]
  796            );
  797            assert_eq!(
  798                editor.scroll_position(cx),
  799                gpui::Point::new(0., editor.max_point(cx).row().as_f32())
  800            );
  801
  802            editor
  803        })
  804    });
  805}
  806
  807#[gpui::test]
  808fn test_cancel(cx: &mut TestAppContext) {
  809    init_test(cx, |_| {});
  810
  811    let editor = cx.add_window(|window, cx| {
  812        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  813        build_editor(buffer, window, cx)
  814    });
  815
  816    _ = editor.update(cx, |editor, window, cx| {
  817        editor.begin_selection(DisplayPoint::new(DisplayRow(3), 4), false, 1, window, cx);
  818        editor.update_selection(
  819            DisplayPoint::new(DisplayRow(1), 1),
  820            0,
  821            gpui::Point::<f32>::default(),
  822            window,
  823            cx,
  824        );
  825        editor.end_selection(window, cx);
  826
  827        editor.begin_selection(DisplayPoint::new(DisplayRow(0), 1), true, 1, window, cx);
  828        editor.update_selection(
  829            DisplayPoint::new(DisplayRow(0), 3),
  830            0,
  831            gpui::Point::<f32>::default(),
  832            window,
  833            cx,
  834        );
  835        editor.end_selection(window, cx);
  836        assert_eq!(
  837            editor.selections.display_ranges(cx),
  838            [
  839                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 3),
  840                DisplayPoint::new(DisplayRow(3), 4)..DisplayPoint::new(DisplayRow(1), 1),
  841            ]
  842        );
  843    });
  844
  845    _ = editor.update(cx, |editor, window, cx| {
  846        editor.cancel(&Cancel, window, cx);
  847        assert_eq!(
  848            editor.selections.display_ranges(cx),
  849            [DisplayPoint::new(DisplayRow(3), 4)..DisplayPoint::new(DisplayRow(1), 1)]
  850        );
  851    });
  852
  853    _ = editor.update(cx, |editor, window, cx| {
  854        editor.cancel(&Cancel, window, cx);
  855        assert_eq!(
  856            editor.selections.display_ranges(cx),
  857            [DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1)]
  858        );
  859    });
  860}
  861
  862#[gpui::test]
  863fn test_fold_action(cx: &mut TestAppContext) {
  864    init_test(cx, |_| {});
  865
  866    let editor = cx.add_window(|window, cx| {
  867        let buffer = MultiBuffer::build_simple(
  868            &"
  869                impl Foo {
  870                    // Hello!
  871
  872                    fn a() {
  873                        1
  874                    }
  875
  876                    fn b() {
  877                        2
  878                    }
  879
  880                    fn c() {
  881                        3
  882                    }
  883                }
  884            "
  885            .unindent(),
  886            cx,
  887        );
  888        build_editor(buffer.clone(), window, cx)
  889    });
  890
  891    _ = editor.update(cx, |editor, window, cx| {
  892        editor.change_selections(None, window, cx, |s| {
  893            s.select_display_ranges([
  894                DisplayPoint::new(DisplayRow(7), 0)..DisplayPoint::new(DisplayRow(12), 0)
  895            ]);
  896        });
  897        editor.fold(&Fold, window, cx);
  898        assert_eq!(
  899            editor.display_text(cx),
  900            "
  901                impl Foo {
  902                    // Hello!
  903
  904                    fn a() {
  905                        1
  906                    }
  907
  908                    fn b() {⋯
  909                    }
  910
  911                    fn c() {⋯
  912                    }
  913                }
  914            "
  915            .unindent(),
  916        );
  917
  918        editor.fold(&Fold, window, cx);
  919        assert_eq!(
  920            editor.display_text(cx),
  921            "
  922                impl Foo {⋯
  923                }
  924            "
  925            .unindent(),
  926        );
  927
  928        editor.unfold_lines(&UnfoldLines, window, cx);
  929        assert_eq!(
  930            editor.display_text(cx),
  931            "
  932                impl Foo {
  933                    // Hello!
  934
  935                    fn a() {
  936                        1
  937                    }
  938
  939                    fn b() {⋯
  940                    }
  941
  942                    fn c() {⋯
  943                    }
  944                }
  945            "
  946            .unindent(),
  947        );
  948
  949        editor.unfold_lines(&UnfoldLines, window, cx);
  950        assert_eq!(
  951            editor.display_text(cx),
  952            editor.buffer.read(cx).read(cx).text()
  953        );
  954    });
  955}
  956
  957#[gpui::test]
  958fn test_fold_action_whitespace_sensitive_language(cx: &mut TestAppContext) {
  959    init_test(cx, |_| {});
  960
  961    let editor = cx.add_window(|window, cx| {
  962        let buffer = MultiBuffer::build_simple(
  963            &"
  964                class Foo:
  965                    # Hello!
  966
  967                    def a():
  968                        print(1)
  969
  970                    def b():
  971                        print(2)
  972
  973                    def c():
  974                        print(3)
  975            "
  976            .unindent(),
  977            cx,
  978        );
  979        build_editor(buffer.clone(), window, cx)
  980    });
  981
  982    _ = editor.update(cx, |editor, window, cx| {
  983        editor.change_selections(None, window, cx, |s| {
  984            s.select_display_ranges([
  985                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(10), 0)
  986            ]);
  987        });
  988        editor.fold(&Fold, window, cx);
  989        assert_eq!(
  990            editor.display_text(cx),
  991            "
  992                class Foo:
  993                    # Hello!
  994
  995                    def a():
  996                        print(1)
  997
  998                    def b():⋯
  999
 1000                    def c():⋯
 1001            "
 1002            .unindent(),
 1003        );
 1004
 1005        editor.fold(&Fold, window, cx);
 1006        assert_eq!(
 1007            editor.display_text(cx),
 1008            "
 1009                class Foo:⋯
 1010            "
 1011            .unindent(),
 1012        );
 1013
 1014        editor.unfold_lines(&UnfoldLines, window, cx);
 1015        assert_eq!(
 1016            editor.display_text(cx),
 1017            "
 1018                class Foo:
 1019                    # Hello!
 1020
 1021                    def a():
 1022                        print(1)
 1023
 1024                    def b():⋯
 1025
 1026                    def c():⋯
 1027            "
 1028            .unindent(),
 1029        );
 1030
 1031        editor.unfold_lines(&UnfoldLines, window, cx);
 1032        assert_eq!(
 1033            editor.display_text(cx),
 1034            editor.buffer.read(cx).read(cx).text()
 1035        );
 1036    });
 1037}
 1038
 1039#[gpui::test]
 1040fn test_fold_action_multiple_line_breaks(cx: &mut TestAppContext) {
 1041    init_test(cx, |_| {});
 1042
 1043    let editor = cx.add_window(|window, cx| {
 1044        let buffer = MultiBuffer::build_simple(
 1045            &"
 1046                class Foo:
 1047                    # Hello!
 1048
 1049                    def a():
 1050                        print(1)
 1051
 1052                    def b():
 1053                        print(2)
 1054
 1055
 1056                    def c():
 1057                        print(3)
 1058
 1059
 1060            "
 1061            .unindent(),
 1062            cx,
 1063        );
 1064        build_editor(buffer.clone(), window, cx)
 1065    });
 1066
 1067    _ = editor.update(cx, |editor, window, cx| {
 1068        editor.change_selections(None, window, cx, |s| {
 1069            s.select_display_ranges([
 1070                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(11), 0)
 1071            ]);
 1072        });
 1073        editor.fold(&Fold, window, cx);
 1074        assert_eq!(
 1075            editor.display_text(cx),
 1076            "
 1077                class Foo:
 1078                    # Hello!
 1079
 1080                    def a():
 1081                        print(1)
 1082
 1083                    def b():⋯
 1084
 1085
 1086                    def c():⋯
 1087
 1088
 1089            "
 1090            .unindent(),
 1091        );
 1092
 1093        editor.fold(&Fold, window, cx);
 1094        assert_eq!(
 1095            editor.display_text(cx),
 1096            "
 1097                class Foo:⋯
 1098
 1099
 1100            "
 1101            .unindent(),
 1102        );
 1103
 1104        editor.unfold_lines(&UnfoldLines, window, cx);
 1105        assert_eq!(
 1106            editor.display_text(cx),
 1107            "
 1108                class Foo:
 1109                    # Hello!
 1110
 1111                    def a():
 1112                        print(1)
 1113
 1114                    def b():⋯
 1115
 1116
 1117                    def c():⋯
 1118
 1119
 1120            "
 1121            .unindent(),
 1122        );
 1123
 1124        editor.unfold_lines(&UnfoldLines, window, cx);
 1125        assert_eq!(
 1126            editor.display_text(cx),
 1127            editor.buffer.read(cx).read(cx).text()
 1128        );
 1129    });
 1130}
 1131
 1132#[gpui::test]
 1133fn test_fold_at_level(cx: &mut TestAppContext) {
 1134    init_test(cx, |_| {});
 1135
 1136    let editor = cx.add_window(|window, cx| {
 1137        let buffer = MultiBuffer::build_simple(
 1138            &"
 1139                class Foo:
 1140                    # Hello!
 1141
 1142                    def a():
 1143                        print(1)
 1144
 1145                    def b():
 1146                        print(2)
 1147
 1148
 1149                class Bar:
 1150                    # World!
 1151
 1152                    def a():
 1153                        print(1)
 1154
 1155                    def b():
 1156                        print(2)
 1157
 1158
 1159            "
 1160            .unindent(),
 1161            cx,
 1162        );
 1163        build_editor(buffer.clone(), window, cx)
 1164    });
 1165
 1166    _ = editor.update(cx, |editor, window, cx| {
 1167        editor.fold_at_level(&FoldAtLevel(2), window, cx);
 1168        assert_eq!(
 1169            editor.display_text(cx),
 1170            "
 1171                class Foo:
 1172                    # Hello!
 1173
 1174                    def a():⋯
 1175
 1176                    def b():⋯
 1177
 1178
 1179                class Bar:
 1180                    # World!
 1181
 1182                    def a():⋯
 1183
 1184                    def b():⋯
 1185
 1186
 1187            "
 1188            .unindent(),
 1189        );
 1190
 1191        editor.fold_at_level(&FoldAtLevel(1), window, cx);
 1192        assert_eq!(
 1193            editor.display_text(cx),
 1194            "
 1195                class Foo:⋯
 1196
 1197
 1198                class Bar:⋯
 1199
 1200
 1201            "
 1202            .unindent(),
 1203        );
 1204
 1205        editor.unfold_all(&UnfoldAll, window, cx);
 1206        editor.fold_at_level(&FoldAtLevel(0), window, cx);
 1207        assert_eq!(
 1208            editor.display_text(cx),
 1209            "
 1210                class Foo:
 1211                    # Hello!
 1212
 1213                    def a():
 1214                        print(1)
 1215
 1216                    def b():
 1217                        print(2)
 1218
 1219
 1220                class Bar:
 1221                    # World!
 1222
 1223                    def a():
 1224                        print(1)
 1225
 1226                    def b():
 1227                        print(2)
 1228
 1229
 1230            "
 1231            .unindent(),
 1232        );
 1233
 1234        assert_eq!(
 1235            editor.display_text(cx),
 1236            editor.buffer.read(cx).read(cx).text()
 1237        );
 1238    });
 1239}
 1240
 1241#[gpui::test]
 1242fn test_move_cursor(cx: &mut TestAppContext) {
 1243    init_test(cx, |_| {});
 1244
 1245    let buffer = cx.update(|cx| MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx));
 1246    let editor = cx.add_window(|window, cx| build_editor(buffer.clone(), window, cx));
 1247
 1248    buffer.update(cx, |buffer, cx| {
 1249        buffer.edit(
 1250            vec![
 1251                (Point::new(1, 0)..Point::new(1, 0), "\t"),
 1252                (Point::new(1, 1)..Point::new(1, 1), "\t"),
 1253            ],
 1254            None,
 1255            cx,
 1256        );
 1257    });
 1258    _ = editor.update(cx, |editor, window, cx| {
 1259        assert_eq!(
 1260            editor.selections.display_ranges(cx),
 1261            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1262        );
 1263
 1264        editor.move_down(&MoveDown, window, cx);
 1265        assert_eq!(
 1266            editor.selections.display_ranges(cx),
 1267            &[DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)]
 1268        );
 1269
 1270        editor.move_right(&MoveRight, window, cx);
 1271        assert_eq!(
 1272            editor.selections.display_ranges(cx),
 1273            &[DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4)]
 1274        );
 1275
 1276        editor.move_left(&MoveLeft, window, cx);
 1277        assert_eq!(
 1278            editor.selections.display_ranges(cx),
 1279            &[DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)]
 1280        );
 1281
 1282        editor.move_up(&MoveUp, window, cx);
 1283        assert_eq!(
 1284            editor.selections.display_ranges(cx),
 1285            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1286        );
 1287
 1288        editor.move_to_end(&MoveToEnd, window, cx);
 1289        assert_eq!(
 1290            editor.selections.display_ranges(cx),
 1291            &[DisplayPoint::new(DisplayRow(5), 6)..DisplayPoint::new(DisplayRow(5), 6)]
 1292        );
 1293
 1294        editor.move_to_beginning(&MoveToBeginning, window, cx);
 1295        assert_eq!(
 1296            editor.selections.display_ranges(cx),
 1297            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1298        );
 1299
 1300        editor.change_selections(None, window, cx, |s| {
 1301            s.select_display_ranges([
 1302                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 2)
 1303            ]);
 1304        });
 1305        editor.select_to_beginning(&SelectToBeginning, window, cx);
 1306        assert_eq!(
 1307            editor.selections.display_ranges(cx),
 1308            &[DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 0)]
 1309        );
 1310
 1311        editor.select_to_end(&SelectToEnd, window, cx);
 1312        assert_eq!(
 1313            editor.selections.display_ranges(cx),
 1314            &[DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(5), 6)]
 1315        );
 1316    });
 1317}
 1318
 1319#[gpui::test]
 1320fn test_move_cursor_multibyte(cx: &mut TestAppContext) {
 1321    init_test(cx, |_| {});
 1322
 1323    let editor = cx.add_window(|window, cx| {
 1324        let buffer = MultiBuffer::build_simple("🟥🟧🟨🟩🟦🟪\nabcde\nαβγδε", cx);
 1325        build_editor(buffer.clone(), window, cx)
 1326    });
 1327
 1328    assert_eq!('🟥'.len_utf8(), 4);
 1329    assert_eq!('α'.len_utf8(), 2);
 1330
 1331    _ = editor.update(cx, |editor, window, cx| {
 1332        editor.fold_creases(
 1333            vec![
 1334                Crease::simple(Point::new(0, 8)..Point::new(0, 16), FoldPlaceholder::test()),
 1335                Crease::simple(Point::new(1, 2)..Point::new(1, 4), FoldPlaceholder::test()),
 1336                Crease::simple(Point::new(2, 4)..Point::new(2, 8), FoldPlaceholder::test()),
 1337            ],
 1338            true,
 1339            window,
 1340            cx,
 1341        );
 1342        assert_eq!(editor.display_text(cx), "🟥🟧⋯🟦🟪\nab⋯e\nαβ⋯ε");
 1343
 1344        editor.move_right(&MoveRight, window, cx);
 1345        assert_eq!(
 1346            editor.selections.display_ranges(cx),
 1347            &[empty_range(0, "🟥".len())]
 1348        );
 1349        editor.move_right(&MoveRight, window, cx);
 1350        assert_eq!(
 1351            editor.selections.display_ranges(cx),
 1352            &[empty_range(0, "🟥🟧".len())]
 1353        );
 1354        editor.move_right(&MoveRight, window, cx);
 1355        assert_eq!(
 1356            editor.selections.display_ranges(cx),
 1357            &[empty_range(0, "🟥🟧⋯".len())]
 1358        );
 1359
 1360        editor.move_down(&MoveDown, window, cx);
 1361        assert_eq!(
 1362            editor.selections.display_ranges(cx),
 1363            &[empty_range(1, "ab⋯e".len())]
 1364        );
 1365        editor.move_left(&MoveLeft, window, cx);
 1366        assert_eq!(
 1367            editor.selections.display_ranges(cx),
 1368            &[empty_range(1, "ab⋯".len())]
 1369        );
 1370        editor.move_left(&MoveLeft, window, cx);
 1371        assert_eq!(
 1372            editor.selections.display_ranges(cx),
 1373            &[empty_range(1, "ab".len())]
 1374        );
 1375        editor.move_left(&MoveLeft, window, cx);
 1376        assert_eq!(
 1377            editor.selections.display_ranges(cx),
 1378            &[empty_range(1, "a".len())]
 1379        );
 1380
 1381        editor.move_down(&MoveDown, window, cx);
 1382        assert_eq!(
 1383            editor.selections.display_ranges(cx),
 1384            &[empty_range(2, "α".len())]
 1385        );
 1386        editor.move_right(&MoveRight, window, cx);
 1387        assert_eq!(
 1388            editor.selections.display_ranges(cx),
 1389            &[empty_range(2, "αβ".len())]
 1390        );
 1391        editor.move_right(&MoveRight, window, cx);
 1392        assert_eq!(
 1393            editor.selections.display_ranges(cx),
 1394            &[empty_range(2, "αβ⋯".len())]
 1395        );
 1396        editor.move_right(&MoveRight, window, cx);
 1397        assert_eq!(
 1398            editor.selections.display_ranges(cx),
 1399            &[empty_range(2, "αβ⋯ε".len())]
 1400        );
 1401
 1402        editor.move_up(&MoveUp, window, cx);
 1403        assert_eq!(
 1404            editor.selections.display_ranges(cx),
 1405            &[empty_range(1, "ab⋯e".len())]
 1406        );
 1407        editor.move_down(&MoveDown, window, cx);
 1408        assert_eq!(
 1409            editor.selections.display_ranges(cx),
 1410            &[empty_range(2, "αβ⋯ε".len())]
 1411        );
 1412        editor.move_up(&MoveUp, window, cx);
 1413        assert_eq!(
 1414            editor.selections.display_ranges(cx),
 1415            &[empty_range(1, "ab⋯e".len())]
 1416        );
 1417
 1418        editor.move_up(&MoveUp, window, cx);
 1419        assert_eq!(
 1420            editor.selections.display_ranges(cx),
 1421            &[empty_range(0, "🟥🟧".len())]
 1422        );
 1423        editor.move_left(&MoveLeft, window, cx);
 1424        assert_eq!(
 1425            editor.selections.display_ranges(cx),
 1426            &[empty_range(0, "🟥".len())]
 1427        );
 1428        editor.move_left(&MoveLeft, window, cx);
 1429        assert_eq!(
 1430            editor.selections.display_ranges(cx),
 1431            &[empty_range(0, "".len())]
 1432        );
 1433    });
 1434}
 1435
 1436#[gpui::test]
 1437fn test_move_cursor_different_line_lengths(cx: &mut TestAppContext) {
 1438    init_test(cx, |_| {});
 1439
 1440    let editor = cx.add_window(|window, cx| {
 1441        let buffer = MultiBuffer::build_simple("ⓐⓑⓒⓓⓔ\nabcd\nαβγ\nabcd\nⓐⓑⓒⓓⓔ\n", cx);
 1442        build_editor(buffer.clone(), window, cx)
 1443    });
 1444    _ = editor.update(cx, |editor, window, cx| {
 1445        editor.change_selections(None, window, cx, |s| {
 1446            s.select_display_ranges([empty_range(0, "ⓐⓑⓒⓓⓔ".len())]);
 1447        });
 1448
 1449        // moving above start of document should move selection to start of document,
 1450        // but the next move down should still be at the original goal_x
 1451        editor.move_up(&MoveUp, window, cx);
 1452        assert_eq!(
 1453            editor.selections.display_ranges(cx),
 1454            &[empty_range(0, "".len())]
 1455        );
 1456
 1457        editor.move_down(&MoveDown, window, cx);
 1458        assert_eq!(
 1459            editor.selections.display_ranges(cx),
 1460            &[empty_range(1, "abcd".len())]
 1461        );
 1462
 1463        editor.move_down(&MoveDown, window, cx);
 1464        assert_eq!(
 1465            editor.selections.display_ranges(cx),
 1466            &[empty_range(2, "αβγ".len())]
 1467        );
 1468
 1469        editor.move_down(&MoveDown, window, cx);
 1470        assert_eq!(
 1471            editor.selections.display_ranges(cx),
 1472            &[empty_range(3, "abcd".len())]
 1473        );
 1474
 1475        editor.move_down(&MoveDown, window, cx);
 1476        assert_eq!(
 1477            editor.selections.display_ranges(cx),
 1478            &[empty_range(4, "ⓐⓑⓒⓓⓔ".len())]
 1479        );
 1480
 1481        // moving past end of document should not change goal_x
 1482        editor.move_down(&MoveDown, window, cx);
 1483        assert_eq!(
 1484            editor.selections.display_ranges(cx),
 1485            &[empty_range(5, "".len())]
 1486        );
 1487
 1488        editor.move_down(&MoveDown, window, cx);
 1489        assert_eq!(
 1490            editor.selections.display_ranges(cx),
 1491            &[empty_range(5, "".len())]
 1492        );
 1493
 1494        editor.move_up(&MoveUp, window, cx);
 1495        assert_eq!(
 1496            editor.selections.display_ranges(cx),
 1497            &[empty_range(4, "ⓐⓑⓒⓓⓔ".len())]
 1498        );
 1499
 1500        editor.move_up(&MoveUp, window, cx);
 1501        assert_eq!(
 1502            editor.selections.display_ranges(cx),
 1503            &[empty_range(3, "abcd".len())]
 1504        );
 1505
 1506        editor.move_up(&MoveUp, window, cx);
 1507        assert_eq!(
 1508            editor.selections.display_ranges(cx),
 1509            &[empty_range(2, "αβγ".len())]
 1510        );
 1511    });
 1512}
 1513
 1514#[gpui::test]
 1515fn test_beginning_end_of_line(cx: &mut TestAppContext) {
 1516    init_test(cx, |_| {});
 1517    let move_to_beg = MoveToBeginningOfLine {
 1518        stop_at_soft_wraps: true,
 1519        stop_at_indent: true,
 1520    };
 1521
 1522    let delete_to_beg = DeleteToBeginningOfLine {
 1523        stop_at_indent: false,
 1524    };
 1525
 1526    let move_to_end = MoveToEndOfLine {
 1527        stop_at_soft_wraps: true,
 1528    };
 1529
 1530    let editor = cx.add_window(|window, cx| {
 1531        let buffer = MultiBuffer::build_simple("abc\n  def", cx);
 1532        build_editor(buffer, window, cx)
 1533    });
 1534    _ = editor.update(cx, |editor, window, cx| {
 1535        editor.change_selections(None, window, cx, |s| {
 1536            s.select_display_ranges([
 1537                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 1538                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4),
 1539            ]);
 1540        });
 1541    });
 1542
 1543    _ = editor.update(cx, |editor, window, cx| {
 1544        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1545        assert_eq!(
 1546            editor.selections.display_ranges(cx),
 1547            &[
 1548                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1549                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1550            ]
 1551        );
 1552    });
 1553
 1554    _ = editor.update(cx, |editor, window, cx| {
 1555        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1556        assert_eq!(
 1557            editor.selections.display_ranges(cx),
 1558            &[
 1559                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1560                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 1561            ]
 1562        );
 1563    });
 1564
 1565    _ = editor.update(cx, |editor, window, cx| {
 1566        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1567        assert_eq!(
 1568            editor.selections.display_ranges(cx),
 1569            &[
 1570                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1571                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1572            ]
 1573        );
 1574    });
 1575
 1576    _ = editor.update(cx, |editor, window, cx| {
 1577        editor.move_to_end_of_line(&move_to_end, window, cx);
 1578        assert_eq!(
 1579            editor.selections.display_ranges(cx),
 1580            &[
 1581                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 1582                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 1583            ]
 1584        );
 1585    });
 1586
 1587    // Moving to the end of line again is a no-op.
 1588    _ = editor.update(cx, |editor, window, cx| {
 1589        editor.move_to_end_of_line(&move_to_end, window, cx);
 1590        assert_eq!(
 1591            editor.selections.display_ranges(cx),
 1592            &[
 1593                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 1594                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 1595            ]
 1596        );
 1597    });
 1598
 1599    _ = editor.update(cx, |editor, window, cx| {
 1600        editor.move_left(&MoveLeft, window, cx);
 1601        editor.select_to_beginning_of_line(
 1602            &SelectToBeginningOfLine {
 1603                stop_at_soft_wraps: true,
 1604                stop_at_indent: true,
 1605            },
 1606            window,
 1607            cx,
 1608        );
 1609        assert_eq!(
 1610            editor.selections.display_ranges(cx),
 1611            &[
 1612                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1613                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 2),
 1614            ]
 1615        );
 1616    });
 1617
 1618    _ = editor.update(cx, |editor, window, cx| {
 1619        editor.select_to_beginning_of_line(
 1620            &SelectToBeginningOfLine {
 1621                stop_at_soft_wraps: true,
 1622                stop_at_indent: true,
 1623            },
 1624            window,
 1625            cx,
 1626        );
 1627        assert_eq!(
 1628            editor.selections.display_ranges(cx),
 1629            &[
 1630                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1631                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 0),
 1632            ]
 1633        );
 1634    });
 1635
 1636    _ = editor.update(cx, |editor, window, cx| {
 1637        editor.select_to_beginning_of_line(
 1638            &SelectToBeginningOfLine {
 1639                stop_at_soft_wraps: true,
 1640                stop_at_indent: true,
 1641            },
 1642            window,
 1643            cx,
 1644        );
 1645        assert_eq!(
 1646            editor.selections.display_ranges(cx),
 1647            &[
 1648                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1649                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 2),
 1650            ]
 1651        );
 1652    });
 1653
 1654    _ = editor.update(cx, |editor, window, cx| {
 1655        editor.select_to_end_of_line(
 1656            &SelectToEndOfLine {
 1657                stop_at_soft_wraps: true,
 1658            },
 1659            window,
 1660            cx,
 1661        );
 1662        assert_eq!(
 1663            editor.selections.display_ranges(cx),
 1664            &[
 1665                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 3),
 1666                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 5),
 1667            ]
 1668        );
 1669    });
 1670
 1671    _ = editor.update(cx, |editor, window, cx| {
 1672        editor.delete_to_end_of_line(&DeleteToEndOfLine, window, cx);
 1673        assert_eq!(editor.display_text(cx), "ab\n  de");
 1674        assert_eq!(
 1675            editor.selections.display_ranges(cx),
 1676            &[
 1677                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 1678                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4),
 1679            ]
 1680        );
 1681    });
 1682
 1683    _ = editor.update(cx, |editor, window, cx| {
 1684        editor.delete_to_beginning_of_line(&delete_to_beg, window, cx);
 1685        assert_eq!(editor.display_text(cx), "\n");
 1686        assert_eq!(
 1687            editor.selections.display_ranges(cx),
 1688            &[
 1689                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1690                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 1691            ]
 1692        );
 1693    });
 1694}
 1695
 1696#[gpui::test]
 1697fn test_beginning_end_of_line_ignore_soft_wrap(cx: &mut TestAppContext) {
 1698    init_test(cx, |_| {});
 1699    let move_to_beg = MoveToBeginningOfLine {
 1700        stop_at_soft_wraps: false,
 1701        stop_at_indent: false,
 1702    };
 1703
 1704    let move_to_end = MoveToEndOfLine {
 1705        stop_at_soft_wraps: false,
 1706    };
 1707
 1708    let editor = cx.add_window(|window, cx| {
 1709        let buffer = MultiBuffer::build_simple("thequickbrownfox\njumpedoverthelazydogs", cx);
 1710        build_editor(buffer, window, cx)
 1711    });
 1712
 1713    _ = editor.update(cx, |editor, window, cx| {
 1714        editor.set_wrap_width(Some(140.0.into()), cx);
 1715
 1716        // We expect the following lines after wrapping
 1717        // ```
 1718        // thequickbrownfox
 1719        // jumpedoverthelazydo
 1720        // gs
 1721        // ```
 1722        // The final `gs` was soft-wrapped onto a new line.
 1723        assert_eq!(
 1724            "thequickbrownfox\njumpedoverthelaz\nydogs",
 1725            editor.display_text(cx),
 1726        );
 1727
 1728        // First, let's assert behavior on the first line, that was not soft-wrapped.
 1729        // Start the cursor at the `k` on the first line
 1730        editor.change_selections(None, window, cx, |s| {
 1731            s.select_display_ranges([
 1732                DisplayPoint::new(DisplayRow(0), 7)..DisplayPoint::new(DisplayRow(0), 7)
 1733            ]);
 1734        });
 1735
 1736        // Moving to the beginning of the line should put us at the beginning of the line.
 1737        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1738        assert_eq!(
 1739            vec![DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),],
 1740            editor.selections.display_ranges(cx)
 1741        );
 1742
 1743        // Moving to the end of the line should put us at the end of the line.
 1744        editor.move_to_end_of_line(&move_to_end, window, cx);
 1745        assert_eq!(
 1746            vec![DisplayPoint::new(DisplayRow(0), 16)..DisplayPoint::new(DisplayRow(0), 16),],
 1747            editor.selections.display_ranges(cx)
 1748        );
 1749
 1750        // Now, let's assert behavior on the second line, that ended up being soft-wrapped.
 1751        // Start the cursor at the last line (`y` that was wrapped to a new line)
 1752        editor.change_selections(None, window, cx, |s| {
 1753            s.select_display_ranges([
 1754                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 0)
 1755            ]);
 1756        });
 1757
 1758        // Moving to the beginning of the line should put us at the start of the second line of
 1759        // display text, i.e., the `j`.
 1760        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1761        assert_eq!(
 1762            vec![DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),],
 1763            editor.selections.display_ranges(cx)
 1764        );
 1765
 1766        // Moving to the beginning of the line again should be a no-op.
 1767        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1768        assert_eq!(
 1769            vec![DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),],
 1770            editor.selections.display_ranges(cx)
 1771        );
 1772
 1773        // Moving to the end of the line should put us right after the `s` that was soft-wrapped to the
 1774        // next display line.
 1775        editor.move_to_end_of_line(&move_to_end, window, cx);
 1776        assert_eq!(
 1777            vec![DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),],
 1778            editor.selections.display_ranges(cx)
 1779        );
 1780
 1781        // Moving to the end of the line again should be a no-op.
 1782        editor.move_to_end_of_line(&move_to_end, window, cx);
 1783        assert_eq!(
 1784            vec![DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),],
 1785            editor.selections.display_ranges(cx)
 1786        );
 1787    });
 1788}
 1789
 1790#[gpui::test]
 1791fn test_beginning_of_line_stop_at_indent(cx: &mut TestAppContext) {
 1792    init_test(cx, |_| {});
 1793
 1794    let move_to_beg = MoveToBeginningOfLine {
 1795        stop_at_soft_wraps: true,
 1796        stop_at_indent: true,
 1797    };
 1798
 1799    let select_to_beg = SelectToBeginningOfLine {
 1800        stop_at_soft_wraps: true,
 1801        stop_at_indent: true,
 1802    };
 1803
 1804    let delete_to_beg = DeleteToBeginningOfLine {
 1805        stop_at_indent: true,
 1806    };
 1807
 1808    let move_to_end = MoveToEndOfLine {
 1809        stop_at_soft_wraps: false,
 1810    };
 1811
 1812    let editor = cx.add_window(|window, cx| {
 1813        let buffer = MultiBuffer::build_simple("abc\n  def", cx);
 1814        build_editor(buffer, window, cx)
 1815    });
 1816
 1817    _ = editor.update(cx, |editor, window, cx| {
 1818        editor.change_selections(None, window, cx, |s| {
 1819            s.select_display_ranges([
 1820                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 1821                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4),
 1822            ]);
 1823        });
 1824
 1825        // Moving to the beginning of the line should put the first cursor at the beginning of the line,
 1826        // and the second cursor at the first non-whitespace character in the line.
 1827        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1828        assert_eq!(
 1829            editor.selections.display_ranges(cx),
 1830            &[
 1831                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1832                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1833            ]
 1834        );
 1835
 1836        // Moving to the beginning of the line again should be a no-op for the first cursor,
 1837        // and should move the second cursor to the beginning of the line.
 1838        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1839        assert_eq!(
 1840            editor.selections.display_ranges(cx),
 1841            &[
 1842                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1843                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 1844            ]
 1845        );
 1846
 1847        // Moving to the beginning of the line again should still be a no-op for the first cursor,
 1848        // and should move the second cursor back to the first non-whitespace character in the line.
 1849        editor.move_to_beginning_of_line(&move_to_beg, window, cx);
 1850        assert_eq!(
 1851            editor.selections.display_ranges(cx),
 1852            &[
 1853                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1854                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1855            ]
 1856        );
 1857
 1858        // Selecting to the beginning of the line should select to the beginning of the line for the first cursor,
 1859        // and to the first non-whitespace character in the line for the second cursor.
 1860        editor.move_to_end_of_line(&move_to_end, window, cx);
 1861        editor.move_left(&MoveLeft, window, cx);
 1862        editor.select_to_beginning_of_line(&select_to_beg, window, cx);
 1863        assert_eq!(
 1864            editor.selections.display_ranges(cx),
 1865            &[
 1866                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1867                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 2),
 1868            ]
 1869        );
 1870
 1871        // Selecting to the beginning of the line again should be a no-op for the first cursor,
 1872        // and should select to the beginning of the line for the second cursor.
 1873        editor.select_to_beginning_of_line(&select_to_beg, window, cx);
 1874        assert_eq!(
 1875            editor.selections.display_ranges(cx),
 1876            &[
 1877                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1878                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 0),
 1879            ]
 1880        );
 1881
 1882        // Deleting to the beginning of the line should delete to the beginning of the line for the first cursor,
 1883        // and should delete to the first non-whitespace character in the line for the second cursor.
 1884        editor.move_to_end_of_line(&move_to_end, window, cx);
 1885        editor.move_left(&MoveLeft, window, cx);
 1886        editor.delete_to_beginning_of_line(&delete_to_beg, window, cx);
 1887        assert_eq!(editor.text(cx), "c\n  f");
 1888    });
 1889}
 1890
 1891#[gpui::test]
 1892fn test_prev_next_word_boundary(cx: &mut TestAppContext) {
 1893    init_test(cx, |_| {});
 1894
 1895    let editor = cx.add_window(|window, cx| {
 1896        let buffer = MultiBuffer::build_simple("use std::str::{foo, bar}\n\n  {baz.qux()}", cx);
 1897        build_editor(buffer, window, cx)
 1898    });
 1899    _ = editor.update(cx, |editor, window, cx| {
 1900        editor.change_selections(None, window, cx, |s| {
 1901            s.select_display_ranges([
 1902                DisplayPoint::new(DisplayRow(0), 11)..DisplayPoint::new(DisplayRow(0), 11),
 1903                DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4),
 1904            ])
 1905        });
 1906
 1907        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 1908        assert_selection_ranges("use std::ˇstr::{foo, bar}\n\n  {ˇbaz.qux()}", editor, cx);
 1909
 1910        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 1911        assert_selection_ranges("use stdˇ::str::{foo, bar}\n\n  ˇ{baz.qux()}", editor, cx);
 1912
 1913        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 1914        assert_selection_ranges("use ˇstd::str::{foo, bar}\n\nˇ  {baz.qux()}", editor, cx);
 1915
 1916        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 1917        assert_selection_ranges("ˇuse std::str::{foo, bar}\nˇ\n  {baz.qux()}", editor, cx);
 1918
 1919        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 1920        assert_selection_ranges("ˇuse std::str::{foo, barˇ}\n\n  {baz.qux()}", editor, cx);
 1921
 1922        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1923        assert_selection_ranges("useˇ std::str::{foo, bar}ˇ\n\n  {baz.qux()}", editor, cx);
 1924
 1925        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1926        assert_selection_ranges("use stdˇ::str::{foo, bar}\nˇ\n  {baz.qux()}", editor, cx);
 1927
 1928        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1929        assert_selection_ranges("use std::ˇstr::{foo, bar}\n\n  {ˇbaz.qux()}", editor, cx);
 1930
 1931        editor.move_right(&MoveRight, window, cx);
 1932        editor.select_to_previous_word_start(&SelectToPreviousWordStart, window, cx);
 1933        assert_selection_ranges(
 1934            "use std::«ˇs»tr::{foo, bar}\n\n  {«ˇb»az.qux()}",
 1935            editor,
 1936            cx,
 1937        );
 1938
 1939        editor.select_to_previous_word_start(&SelectToPreviousWordStart, window, cx);
 1940        assert_selection_ranges(
 1941            "use std«ˇ::s»tr::{foo, bar}\n\n  «ˇ{b»az.qux()}",
 1942            editor,
 1943            cx,
 1944        );
 1945
 1946        editor.select_to_next_word_end(&SelectToNextWordEnd, window, cx);
 1947        assert_selection_ranges(
 1948            "use std::«ˇs»tr::{foo, bar}\n\n  {«ˇb»az.qux()}",
 1949            editor,
 1950            cx,
 1951        );
 1952    });
 1953}
 1954
 1955#[gpui::test]
 1956fn test_prev_next_word_bounds_with_soft_wrap(cx: &mut TestAppContext) {
 1957    init_test(cx, |_| {});
 1958
 1959    let editor = cx.add_window(|window, cx| {
 1960        let buffer = MultiBuffer::build_simple("use one::{\n    two::three::four::five\n};", cx);
 1961        build_editor(buffer, window, cx)
 1962    });
 1963
 1964    _ = editor.update(cx, |editor, window, cx| {
 1965        editor.set_wrap_width(Some(140.0.into()), cx);
 1966        assert_eq!(
 1967            editor.display_text(cx),
 1968            "use one::{\n    two::three::\n    four::five\n};"
 1969        );
 1970
 1971        editor.change_selections(None, window, cx, |s| {
 1972            s.select_display_ranges([
 1973                DisplayPoint::new(DisplayRow(1), 7)..DisplayPoint::new(DisplayRow(1), 7)
 1974            ]);
 1975        });
 1976
 1977        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1978        assert_eq!(
 1979            editor.selections.display_ranges(cx),
 1980            &[DisplayPoint::new(DisplayRow(1), 9)..DisplayPoint::new(DisplayRow(1), 9)]
 1981        );
 1982
 1983        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1984        assert_eq!(
 1985            editor.selections.display_ranges(cx),
 1986            &[DisplayPoint::new(DisplayRow(1), 14)..DisplayPoint::new(DisplayRow(1), 14)]
 1987        );
 1988
 1989        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1990        assert_eq!(
 1991            editor.selections.display_ranges(cx),
 1992            &[DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4)]
 1993        );
 1994
 1995        editor.move_to_next_word_end(&MoveToNextWordEnd, window, cx);
 1996        assert_eq!(
 1997            editor.selections.display_ranges(cx),
 1998            &[DisplayPoint::new(DisplayRow(2), 8)..DisplayPoint::new(DisplayRow(2), 8)]
 1999        );
 2000
 2001        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 2002        assert_eq!(
 2003            editor.selections.display_ranges(cx),
 2004            &[DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4)]
 2005        );
 2006
 2007        editor.move_to_previous_word_start(&MoveToPreviousWordStart, window, cx);
 2008        assert_eq!(
 2009            editor.selections.display_ranges(cx),
 2010            &[DisplayPoint::new(DisplayRow(1), 14)..DisplayPoint::new(DisplayRow(1), 14)]
 2011        );
 2012    });
 2013}
 2014
 2015#[gpui::test]
 2016async fn test_move_start_of_paragraph_end_of_paragraph(cx: &mut TestAppContext) {
 2017    init_test(cx, |_| {});
 2018    let mut cx = EditorTestContext::new(cx).await;
 2019
 2020    let line_height = cx.editor(|editor, window, _| {
 2021        editor
 2022            .style()
 2023            .unwrap()
 2024            .text
 2025            .line_height_in_pixels(window.rem_size())
 2026    });
 2027    cx.simulate_window_resize(cx.window, size(px(100.), 4. * line_height));
 2028
 2029    cx.set_state(
 2030        &r#"ˇone
 2031        two
 2032
 2033        three
 2034        fourˇ
 2035        five
 2036
 2037        six"#
 2038            .unindent(),
 2039    );
 2040
 2041    cx.update_editor(|editor, window, cx| {
 2042        editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, window, cx)
 2043    });
 2044    cx.assert_editor_state(
 2045        &r#"one
 2046        two
 2047        ˇ
 2048        three
 2049        four
 2050        five
 2051        ˇ
 2052        six"#
 2053            .unindent(),
 2054    );
 2055
 2056    cx.update_editor(|editor, window, cx| {
 2057        editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, window, cx)
 2058    });
 2059    cx.assert_editor_state(
 2060        &r#"one
 2061        two
 2062
 2063        three
 2064        four
 2065        five
 2066        ˇ
 2067        sixˇ"#
 2068            .unindent(),
 2069    );
 2070
 2071    cx.update_editor(|editor, window, cx| {
 2072        editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, window, cx)
 2073    });
 2074    cx.assert_editor_state(
 2075        &r#"one
 2076        two
 2077
 2078        three
 2079        four
 2080        five
 2081
 2082        sixˇ"#
 2083            .unindent(),
 2084    );
 2085
 2086    cx.update_editor(|editor, window, cx| {
 2087        editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, window, cx)
 2088    });
 2089    cx.assert_editor_state(
 2090        &r#"one
 2091        two
 2092
 2093        three
 2094        four
 2095        five
 2096        ˇ
 2097        six"#
 2098            .unindent(),
 2099    );
 2100
 2101    cx.update_editor(|editor, window, cx| {
 2102        editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, window, cx)
 2103    });
 2104    cx.assert_editor_state(
 2105        &r#"one
 2106        two
 2107        ˇ
 2108        three
 2109        four
 2110        five
 2111
 2112        six"#
 2113            .unindent(),
 2114    );
 2115
 2116    cx.update_editor(|editor, window, cx| {
 2117        editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, window, cx)
 2118    });
 2119    cx.assert_editor_state(
 2120        &r#"ˇone
 2121        two
 2122
 2123        three
 2124        four
 2125        five
 2126
 2127        six"#
 2128            .unindent(),
 2129    );
 2130}
 2131
 2132#[gpui::test]
 2133async fn test_scroll_page_up_page_down(cx: &mut TestAppContext) {
 2134    init_test(cx, |_| {});
 2135    let mut cx = EditorTestContext::new(cx).await;
 2136    let line_height = cx.editor(|editor, window, _| {
 2137        editor
 2138            .style()
 2139            .unwrap()
 2140            .text
 2141            .line_height_in_pixels(window.rem_size())
 2142    });
 2143    let window = cx.window;
 2144    cx.simulate_window_resize(window, size(px(1000.), 4. * line_height + px(0.5)));
 2145
 2146    cx.set_state(
 2147        r#"ˇone
 2148        two
 2149        three
 2150        four
 2151        five
 2152        six
 2153        seven
 2154        eight
 2155        nine
 2156        ten
 2157        "#,
 2158    );
 2159
 2160    cx.update_editor(|editor, window, cx| {
 2161        assert_eq!(
 2162            editor.snapshot(window, cx).scroll_position(),
 2163            gpui::Point::new(0., 0.)
 2164        );
 2165        editor.scroll_screen(&ScrollAmount::Page(1.), window, cx);
 2166        assert_eq!(
 2167            editor.snapshot(window, cx).scroll_position(),
 2168            gpui::Point::new(0., 3.)
 2169        );
 2170        editor.scroll_screen(&ScrollAmount::Page(1.), window, cx);
 2171        assert_eq!(
 2172            editor.snapshot(window, cx).scroll_position(),
 2173            gpui::Point::new(0., 6.)
 2174        );
 2175        editor.scroll_screen(&ScrollAmount::Page(-1.), window, cx);
 2176        assert_eq!(
 2177            editor.snapshot(window, cx).scroll_position(),
 2178            gpui::Point::new(0., 3.)
 2179        );
 2180
 2181        editor.scroll_screen(&ScrollAmount::Page(-0.5), window, cx);
 2182        assert_eq!(
 2183            editor.snapshot(window, cx).scroll_position(),
 2184            gpui::Point::new(0., 1.)
 2185        );
 2186        editor.scroll_screen(&ScrollAmount::Page(0.5), window, cx);
 2187        assert_eq!(
 2188            editor.snapshot(window, cx).scroll_position(),
 2189            gpui::Point::new(0., 3.)
 2190        );
 2191    });
 2192}
 2193
 2194#[gpui::test]
 2195async fn test_autoscroll(cx: &mut TestAppContext) {
 2196    init_test(cx, |_| {});
 2197    let mut cx = EditorTestContext::new(cx).await;
 2198
 2199    let line_height = cx.update_editor(|editor, window, cx| {
 2200        editor.set_vertical_scroll_margin(2, cx);
 2201        editor
 2202            .style()
 2203            .unwrap()
 2204            .text
 2205            .line_height_in_pixels(window.rem_size())
 2206    });
 2207    let window = cx.window;
 2208    cx.simulate_window_resize(window, size(px(1000.), 6. * line_height));
 2209
 2210    cx.set_state(
 2211        r#"ˇone
 2212            two
 2213            three
 2214            four
 2215            five
 2216            six
 2217            seven
 2218            eight
 2219            nine
 2220            ten
 2221        "#,
 2222    );
 2223    cx.update_editor(|editor, window, cx| {
 2224        assert_eq!(
 2225            editor.snapshot(window, cx).scroll_position(),
 2226            gpui::Point::new(0., 0.0)
 2227        );
 2228    });
 2229
 2230    // Add a cursor below the visible area. Since both cursors cannot fit
 2231    // on screen, the editor autoscrolls to reveal the newest cursor, and
 2232    // allows the vertical scroll margin below that cursor.
 2233    cx.update_editor(|editor, window, cx| {
 2234        editor.change_selections(Some(Autoscroll::fit()), window, cx, |selections| {
 2235            selections.select_ranges([
 2236                Point::new(0, 0)..Point::new(0, 0),
 2237                Point::new(6, 0)..Point::new(6, 0),
 2238            ]);
 2239        })
 2240    });
 2241    cx.update_editor(|editor, window, cx| {
 2242        assert_eq!(
 2243            editor.snapshot(window, cx).scroll_position(),
 2244            gpui::Point::new(0., 3.0)
 2245        );
 2246    });
 2247
 2248    // Move down. The editor cursor scrolls down to track the newest cursor.
 2249    cx.update_editor(|editor, window, cx| {
 2250        editor.move_down(&Default::default(), window, cx);
 2251    });
 2252    cx.update_editor(|editor, window, cx| {
 2253        assert_eq!(
 2254            editor.snapshot(window, cx).scroll_position(),
 2255            gpui::Point::new(0., 4.0)
 2256        );
 2257    });
 2258
 2259    // Add a cursor above the visible area. Since both cursors fit on screen,
 2260    // the editor scrolls to show both.
 2261    cx.update_editor(|editor, window, cx| {
 2262        editor.change_selections(Some(Autoscroll::fit()), window, cx, |selections| {
 2263            selections.select_ranges([
 2264                Point::new(1, 0)..Point::new(1, 0),
 2265                Point::new(6, 0)..Point::new(6, 0),
 2266            ]);
 2267        })
 2268    });
 2269    cx.update_editor(|editor, window, cx| {
 2270        assert_eq!(
 2271            editor.snapshot(window, cx).scroll_position(),
 2272            gpui::Point::new(0., 1.0)
 2273        );
 2274    });
 2275}
 2276
 2277#[gpui::test]
 2278async fn test_move_page_up_page_down(cx: &mut TestAppContext) {
 2279    init_test(cx, |_| {});
 2280    let mut cx = EditorTestContext::new(cx).await;
 2281
 2282    let line_height = cx.editor(|editor, window, _cx| {
 2283        editor
 2284            .style()
 2285            .unwrap()
 2286            .text
 2287            .line_height_in_pixels(window.rem_size())
 2288    });
 2289    let window = cx.window;
 2290    cx.simulate_window_resize(window, size(px(100.), 4. * line_height));
 2291    cx.set_state(
 2292        &r#"
 2293        ˇone
 2294        two
 2295        threeˇ
 2296        four
 2297        five
 2298        six
 2299        seven
 2300        eight
 2301        nine
 2302        ten
 2303        "#
 2304        .unindent(),
 2305    );
 2306
 2307    cx.update_editor(|editor, window, cx| {
 2308        editor.move_page_down(&MovePageDown::default(), window, cx)
 2309    });
 2310    cx.assert_editor_state(
 2311        &r#"
 2312        one
 2313        two
 2314        three
 2315        ˇfour
 2316        five
 2317        sixˇ
 2318        seven
 2319        eight
 2320        nine
 2321        ten
 2322        "#
 2323        .unindent(),
 2324    );
 2325
 2326    cx.update_editor(|editor, window, cx| {
 2327        editor.move_page_down(&MovePageDown::default(), window, cx)
 2328    });
 2329    cx.assert_editor_state(
 2330        &r#"
 2331        one
 2332        two
 2333        three
 2334        four
 2335        five
 2336        six
 2337        ˇseven
 2338        eight
 2339        nineˇ
 2340        ten
 2341        "#
 2342        .unindent(),
 2343    );
 2344
 2345    cx.update_editor(|editor, window, cx| editor.move_page_up(&MovePageUp::default(), window, cx));
 2346    cx.assert_editor_state(
 2347        &r#"
 2348        one
 2349        two
 2350        three
 2351        ˇfour
 2352        five
 2353        sixˇ
 2354        seven
 2355        eight
 2356        nine
 2357        ten
 2358        "#
 2359        .unindent(),
 2360    );
 2361
 2362    cx.update_editor(|editor, window, cx| editor.move_page_up(&MovePageUp::default(), window, cx));
 2363    cx.assert_editor_state(
 2364        &r#"
 2365        ˇone
 2366        two
 2367        threeˇ
 2368        four
 2369        five
 2370        six
 2371        seven
 2372        eight
 2373        nine
 2374        ten
 2375        "#
 2376        .unindent(),
 2377    );
 2378
 2379    // Test select collapsing
 2380    cx.update_editor(|editor, window, cx| {
 2381        editor.move_page_down(&MovePageDown::default(), window, cx);
 2382        editor.move_page_down(&MovePageDown::default(), window, cx);
 2383        editor.move_page_down(&MovePageDown::default(), window, cx);
 2384    });
 2385    cx.assert_editor_state(
 2386        &r#"
 2387        one
 2388        two
 2389        three
 2390        four
 2391        five
 2392        six
 2393        seven
 2394        eight
 2395        nine
 2396        ˇten
 2397        ˇ"#
 2398        .unindent(),
 2399    );
 2400}
 2401
 2402#[gpui::test]
 2403async fn test_delete_to_beginning_of_line(cx: &mut TestAppContext) {
 2404    init_test(cx, |_| {});
 2405    let mut cx = EditorTestContext::new(cx).await;
 2406    cx.set_state("one «two threeˇ» four");
 2407    cx.update_editor(|editor, window, cx| {
 2408        editor.delete_to_beginning_of_line(
 2409            &DeleteToBeginningOfLine {
 2410                stop_at_indent: false,
 2411            },
 2412            window,
 2413            cx,
 2414        );
 2415        assert_eq!(editor.text(cx), " four");
 2416    });
 2417}
 2418
 2419#[gpui::test]
 2420fn test_delete_to_word_boundary(cx: &mut TestAppContext) {
 2421    init_test(cx, |_| {});
 2422
 2423    let editor = cx.add_window(|window, cx| {
 2424        let buffer = MultiBuffer::build_simple("one two three four", cx);
 2425        build_editor(buffer.clone(), window, cx)
 2426    });
 2427
 2428    _ = editor.update(cx, |editor, window, cx| {
 2429        editor.change_selections(None, window, cx, |s| {
 2430            s.select_display_ranges([
 2431                // an empty selection - the preceding word fragment is deleted
 2432                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 2433                // characters selected - they are deleted
 2434                DisplayPoint::new(DisplayRow(0), 9)..DisplayPoint::new(DisplayRow(0), 12),
 2435            ])
 2436        });
 2437        editor.delete_to_previous_word_start(
 2438            &DeleteToPreviousWordStart {
 2439                ignore_newlines: false,
 2440            },
 2441            window,
 2442            cx,
 2443        );
 2444        assert_eq!(editor.buffer.read(cx).read(cx).text(), "e two te four");
 2445    });
 2446
 2447    _ = editor.update(cx, |editor, window, cx| {
 2448        editor.change_selections(None, window, cx, |s| {
 2449            s.select_display_ranges([
 2450                // an empty selection - the following word fragment is deleted
 2451                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 2452                // characters selected - they are deleted
 2453                DisplayPoint::new(DisplayRow(0), 9)..DisplayPoint::new(DisplayRow(0), 10),
 2454            ])
 2455        });
 2456        editor.delete_to_next_word_end(
 2457            &DeleteToNextWordEnd {
 2458                ignore_newlines: false,
 2459            },
 2460            window,
 2461            cx,
 2462        );
 2463        assert_eq!(editor.buffer.read(cx).read(cx).text(), "e t te our");
 2464    });
 2465}
 2466
 2467#[gpui::test]
 2468fn test_delete_to_previous_word_start_or_newline(cx: &mut TestAppContext) {
 2469    init_test(cx, |_| {});
 2470
 2471    let editor = cx.add_window(|window, cx| {
 2472        let buffer = MultiBuffer::build_simple("one\n2\nthree\n4", cx);
 2473        build_editor(buffer.clone(), window, cx)
 2474    });
 2475    let del_to_prev_word_start = DeleteToPreviousWordStart {
 2476        ignore_newlines: false,
 2477    };
 2478    let del_to_prev_word_start_ignore_newlines = DeleteToPreviousWordStart {
 2479        ignore_newlines: true,
 2480    };
 2481
 2482    _ = editor.update(cx, |editor, window, cx| {
 2483        editor.change_selections(None, window, cx, |s| {
 2484            s.select_display_ranges([
 2485                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1)
 2486            ])
 2487        });
 2488        editor.delete_to_previous_word_start(&del_to_prev_word_start, window, cx);
 2489        assert_eq!(editor.buffer.read(cx).read(cx).text(), "one\n2\nthree\n");
 2490        editor.delete_to_previous_word_start(&del_to_prev_word_start, window, cx);
 2491        assert_eq!(editor.buffer.read(cx).read(cx).text(), "one\n2\nthree");
 2492        editor.delete_to_previous_word_start(&del_to_prev_word_start, window, cx);
 2493        assert_eq!(editor.buffer.read(cx).read(cx).text(), "one\n2\n");
 2494        editor.delete_to_previous_word_start(&del_to_prev_word_start, window, cx);
 2495        assert_eq!(editor.buffer.read(cx).read(cx).text(), "one\n2");
 2496        editor.delete_to_previous_word_start(&del_to_prev_word_start_ignore_newlines, window, cx);
 2497        assert_eq!(editor.buffer.read(cx).read(cx).text(), "one\n");
 2498        editor.delete_to_previous_word_start(&del_to_prev_word_start_ignore_newlines, window, cx);
 2499        assert_eq!(editor.buffer.read(cx).read(cx).text(), "");
 2500    });
 2501}
 2502
 2503#[gpui::test]
 2504fn test_delete_to_next_word_end_or_newline(cx: &mut TestAppContext) {
 2505    init_test(cx, |_| {});
 2506
 2507    let editor = cx.add_window(|window, cx| {
 2508        let buffer = MultiBuffer::build_simple("\none\n   two\nthree\n   four", cx);
 2509        build_editor(buffer.clone(), window, cx)
 2510    });
 2511    let del_to_next_word_end = DeleteToNextWordEnd {
 2512        ignore_newlines: false,
 2513    };
 2514    let del_to_next_word_end_ignore_newlines = DeleteToNextWordEnd {
 2515        ignore_newlines: true,
 2516    };
 2517
 2518    _ = editor.update(cx, |editor, window, cx| {
 2519        editor.change_selections(None, window, cx, |s| {
 2520            s.select_display_ranges([
 2521                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)
 2522            ])
 2523        });
 2524        editor.delete_to_next_word_end(&del_to_next_word_end, window, cx);
 2525        assert_eq!(
 2526            editor.buffer.read(cx).read(cx).text(),
 2527            "one\n   two\nthree\n   four"
 2528        );
 2529        editor.delete_to_next_word_end(&del_to_next_word_end, window, cx);
 2530        assert_eq!(
 2531            editor.buffer.read(cx).read(cx).text(),
 2532            "\n   two\nthree\n   four"
 2533        );
 2534        editor.delete_to_next_word_end(&del_to_next_word_end, window, cx);
 2535        assert_eq!(
 2536            editor.buffer.read(cx).read(cx).text(),
 2537            "two\nthree\n   four"
 2538        );
 2539        editor.delete_to_next_word_end(&del_to_next_word_end, window, cx);
 2540        assert_eq!(editor.buffer.read(cx).read(cx).text(), "\nthree\n   four");
 2541        editor.delete_to_next_word_end(&del_to_next_word_end_ignore_newlines, window, cx);
 2542        assert_eq!(editor.buffer.read(cx).read(cx).text(), "\n   four");
 2543        editor.delete_to_next_word_end(&del_to_next_word_end_ignore_newlines, window, cx);
 2544        assert_eq!(editor.buffer.read(cx).read(cx).text(), "");
 2545    });
 2546}
 2547
 2548#[gpui::test]
 2549fn test_newline(cx: &mut TestAppContext) {
 2550    init_test(cx, |_| {});
 2551
 2552    let editor = cx.add_window(|window, cx| {
 2553        let buffer = MultiBuffer::build_simple("aaaa\n    bbbb\n", cx);
 2554        build_editor(buffer.clone(), window, cx)
 2555    });
 2556
 2557    _ = editor.update(cx, |editor, window, cx| {
 2558        editor.change_selections(None, window, cx, |s| {
 2559            s.select_display_ranges([
 2560                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 2561                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 2562                DisplayPoint::new(DisplayRow(1), 6)..DisplayPoint::new(DisplayRow(1), 6),
 2563            ])
 2564        });
 2565
 2566        editor.newline(&Newline, window, cx);
 2567        assert_eq!(editor.text(cx), "aa\naa\n  \n    bb\n    bb\n");
 2568    });
 2569}
 2570
 2571#[gpui::test]
 2572fn test_newline_with_old_selections(cx: &mut TestAppContext) {
 2573    init_test(cx, |_| {});
 2574
 2575    let editor = cx.add_window(|window, cx| {
 2576        let buffer = MultiBuffer::build_simple(
 2577            "
 2578                a
 2579                b(
 2580                    X
 2581                )
 2582                c(
 2583                    X
 2584                )
 2585            "
 2586            .unindent()
 2587            .as_str(),
 2588            cx,
 2589        );
 2590        let mut editor = build_editor(buffer.clone(), window, cx);
 2591        editor.change_selections(None, window, cx, |s| {
 2592            s.select_ranges([
 2593                Point::new(2, 4)..Point::new(2, 5),
 2594                Point::new(5, 4)..Point::new(5, 5),
 2595            ])
 2596        });
 2597        editor
 2598    });
 2599
 2600    _ = editor.update(cx, |editor, window, cx| {
 2601        // Edit the buffer directly, deleting ranges surrounding the editor's selections
 2602        editor.buffer.update(cx, |buffer, cx| {
 2603            buffer.edit(
 2604                [
 2605                    (Point::new(1, 2)..Point::new(3, 0), ""),
 2606                    (Point::new(4, 2)..Point::new(6, 0), ""),
 2607                ],
 2608                None,
 2609                cx,
 2610            );
 2611            assert_eq!(
 2612                buffer.read(cx).text(),
 2613                "
 2614                    a
 2615                    b()
 2616                    c()
 2617                "
 2618                .unindent()
 2619            );
 2620        });
 2621        assert_eq!(
 2622            editor.selections.ranges(cx),
 2623            &[
 2624                Point::new(1, 2)..Point::new(1, 2),
 2625                Point::new(2, 2)..Point::new(2, 2),
 2626            ],
 2627        );
 2628
 2629        editor.newline(&Newline, window, cx);
 2630        assert_eq!(
 2631            editor.text(cx),
 2632            "
 2633                a
 2634                b(
 2635                )
 2636                c(
 2637                )
 2638            "
 2639            .unindent()
 2640        );
 2641
 2642        // The selections are moved after the inserted newlines
 2643        assert_eq!(
 2644            editor.selections.ranges(cx),
 2645            &[
 2646                Point::new(2, 0)..Point::new(2, 0),
 2647                Point::new(4, 0)..Point::new(4, 0),
 2648            ],
 2649        );
 2650    });
 2651}
 2652
 2653#[gpui::test]
 2654async fn test_newline_above(cx: &mut TestAppContext) {
 2655    init_test(cx, |settings| {
 2656        settings.defaults.tab_size = NonZeroU32::new(4)
 2657    });
 2658
 2659    let language = Arc::new(
 2660        Language::new(
 2661            LanguageConfig::default(),
 2662            Some(tree_sitter_rust::LANGUAGE.into()),
 2663        )
 2664        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2665        .unwrap(),
 2666    );
 2667
 2668    let mut cx = EditorTestContext::new(cx).await;
 2669    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2670    cx.set_state(indoc! {"
 2671        const a: ˇA = (
 2672 2673                «const_functionˇ»(ˇ),
 2674                so«mˇ»et«hˇ»ing_ˇelse,ˇ
 2675 2676        ˇ);ˇ
 2677    "});
 2678
 2679    cx.update_editor(|e, window, cx| e.newline_above(&NewlineAbove, window, cx));
 2680    cx.assert_editor_state(indoc! {"
 2681        ˇ
 2682        const a: A = (
 2683            ˇ
 2684            (
 2685                ˇ
 2686                ˇ
 2687                const_function(),
 2688                ˇ
 2689                ˇ
 2690                ˇ
 2691                ˇ
 2692                something_else,
 2693                ˇ
 2694            )
 2695            ˇ
 2696            ˇ
 2697        );
 2698    "});
 2699}
 2700
 2701#[gpui::test]
 2702async fn test_newline_below(cx: &mut TestAppContext) {
 2703    init_test(cx, |settings| {
 2704        settings.defaults.tab_size = NonZeroU32::new(4)
 2705    });
 2706
 2707    let language = Arc::new(
 2708        Language::new(
 2709            LanguageConfig::default(),
 2710            Some(tree_sitter_rust::LANGUAGE.into()),
 2711        )
 2712        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2713        .unwrap(),
 2714    );
 2715
 2716    let mut cx = EditorTestContext::new(cx).await;
 2717    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2718    cx.set_state(indoc! {"
 2719        const a: ˇA = (
 2720 2721                «const_functionˇ»(ˇ),
 2722                so«mˇ»et«hˇ»ing_ˇelse,ˇ
 2723 2724        ˇ);ˇ
 2725    "});
 2726
 2727    cx.update_editor(|e, window, cx| e.newline_below(&NewlineBelow, window, cx));
 2728    cx.assert_editor_state(indoc! {"
 2729        const a: A = (
 2730            ˇ
 2731            (
 2732                ˇ
 2733                const_function(),
 2734                ˇ
 2735                ˇ
 2736                something_else,
 2737                ˇ
 2738                ˇ
 2739                ˇ
 2740                ˇ
 2741            )
 2742            ˇ
 2743        );
 2744        ˇ
 2745        ˇ
 2746    "});
 2747}
 2748
 2749#[gpui::test]
 2750async fn test_newline_comments(cx: &mut TestAppContext) {
 2751    init_test(cx, |settings| {
 2752        settings.defaults.tab_size = NonZeroU32::new(4)
 2753    });
 2754
 2755    let language = Arc::new(Language::new(
 2756        LanguageConfig {
 2757            line_comments: vec!["//".into()],
 2758            ..LanguageConfig::default()
 2759        },
 2760        None,
 2761    ));
 2762    {
 2763        let mut cx = EditorTestContext::new(cx).await;
 2764        cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2765        cx.set_state(indoc! {"
 2766        // Fooˇ
 2767    "});
 2768
 2769        cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
 2770        cx.assert_editor_state(indoc! {"
 2771        // Foo
 2772        //ˇ
 2773    "});
 2774        // Ensure that if cursor is before the comment start, we do not actually insert a comment prefix.
 2775        cx.set_state(indoc! {"
 2776        ˇ// Foo
 2777    "});
 2778        cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
 2779        cx.assert_editor_state(indoc! {"
 2780
 2781        ˇ// Foo
 2782    "});
 2783    }
 2784    // Ensure that comment continuations can be disabled.
 2785    update_test_language_settings(cx, |settings| {
 2786        settings.defaults.extend_comment_on_newline = Some(false);
 2787    });
 2788    let mut cx = EditorTestContext::new(cx).await;
 2789    cx.set_state(indoc! {"
 2790        // Fooˇ
 2791    "});
 2792    cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
 2793    cx.assert_editor_state(indoc! {"
 2794        // Foo
 2795        ˇ
 2796    "});
 2797}
 2798
 2799#[gpui::test]
 2800fn test_insert_with_old_selections(cx: &mut TestAppContext) {
 2801    init_test(cx, |_| {});
 2802
 2803    let editor = cx.add_window(|window, cx| {
 2804        let buffer = MultiBuffer::build_simple("a( X ), b( Y ), c( Z )", cx);
 2805        let mut editor = build_editor(buffer.clone(), window, cx);
 2806        editor.change_selections(None, window, cx, |s| {
 2807            s.select_ranges([3..4, 11..12, 19..20])
 2808        });
 2809        editor
 2810    });
 2811
 2812    _ = editor.update(cx, |editor, window, cx| {
 2813        // Edit the buffer directly, deleting ranges surrounding the editor's selections
 2814        editor.buffer.update(cx, |buffer, cx| {
 2815            buffer.edit([(2..5, ""), (10..13, ""), (18..21, "")], None, cx);
 2816            assert_eq!(buffer.read(cx).text(), "a(), b(), c()".unindent());
 2817        });
 2818        assert_eq!(editor.selections.ranges(cx), &[2..2, 7..7, 12..12],);
 2819
 2820        editor.insert("Z", window, cx);
 2821        assert_eq!(editor.text(cx), "a(Z), b(Z), c(Z)");
 2822
 2823        // The selections are moved after the inserted characters
 2824        assert_eq!(editor.selections.ranges(cx), &[3..3, 9..9, 15..15],);
 2825    });
 2826}
 2827
 2828#[gpui::test]
 2829async fn test_tab(cx: &mut TestAppContext) {
 2830    init_test(cx, |settings| {
 2831        settings.defaults.tab_size = NonZeroU32::new(3)
 2832    });
 2833
 2834    let mut cx = EditorTestContext::new(cx).await;
 2835    cx.set_state(indoc! {"
 2836        ˇabˇc
 2837        ˇ🏀ˇ🏀ˇefg
 2838 2839    "});
 2840    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2841    cx.assert_editor_state(indoc! {"
 2842           ˇab ˇc
 2843           ˇ🏀  ˇ🏀  ˇefg
 2844        d  ˇ
 2845    "});
 2846
 2847    cx.set_state(indoc! {"
 2848        a
 2849        «🏀ˇ»🏀«🏀ˇ»🏀«🏀ˇ»
 2850    "});
 2851    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2852    cx.assert_editor_state(indoc! {"
 2853        a
 2854           «🏀ˇ»🏀«🏀ˇ»🏀«🏀ˇ»
 2855    "});
 2856}
 2857
 2858#[gpui::test]
 2859async fn test_tab_in_leading_whitespace_auto_indents_lines(cx: &mut TestAppContext) {
 2860    init_test(cx, |_| {});
 2861
 2862    let mut cx = EditorTestContext::new(cx).await;
 2863    let language = Arc::new(
 2864        Language::new(
 2865            LanguageConfig::default(),
 2866            Some(tree_sitter_rust::LANGUAGE.into()),
 2867        )
 2868        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2869        .unwrap(),
 2870    );
 2871    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2872
 2873    // cursors that are already at the suggested indent level insert
 2874    // a soft tab. cursors that are to the left of the suggested indent
 2875    // auto-indent their line.
 2876    cx.set_state(indoc! {"
 2877        ˇ
 2878        const a: B = (
 2879            c(
 2880                d(
 2881        ˇ
 2882                )
 2883        ˇ
 2884        ˇ    )
 2885        );
 2886    "});
 2887    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2888    cx.assert_editor_state(indoc! {"
 2889            ˇ
 2890        const a: B = (
 2891            c(
 2892                d(
 2893                    ˇ
 2894                )
 2895                ˇ
 2896            ˇ)
 2897        );
 2898    "});
 2899
 2900    // handle auto-indent when there are multiple cursors on the same line
 2901    cx.set_state(indoc! {"
 2902        const a: B = (
 2903            c(
 2904        ˇ    ˇ
 2905        ˇ    )
 2906        );
 2907    "});
 2908    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2909    cx.assert_editor_state(indoc! {"
 2910        const a: B = (
 2911            c(
 2912                ˇ
 2913            ˇ)
 2914        );
 2915    "});
 2916}
 2917
 2918#[gpui::test]
 2919async fn test_tab_with_mixed_whitespace_txt(cx: &mut TestAppContext) {
 2920    init_test(cx, |settings| {
 2921        settings.defaults.tab_size = NonZeroU32::new(3)
 2922    });
 2923
 2924    let mut cx = EditorTestContext::new(cx).await;
 2925    cx.set_state(indoc! {"
 2926         ˇ
 2927        \t ˇ
 2928        \t  ˇ
 2929        \t   ˇ
 2930         \t  \t\t \t      \t\t   \t\t    \t \t ˇ
 2931    "});
 2932
 2933    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2934    cx.assert_editor_state(indoc! {"
 2935           ˇ
 2936        \t   ˇ
 2937        \t   ˇ
 2938        \t      ˇ
 2939         \t  \t\t \t      \t\t   \t\t    \t \t   ˇ
 2940    "});
 2941}
 2942
 2943#[gpui::test]
 2944async fn test_tab_with_mixed_whitespace_rust(cx: &mut TestAppContext) {
 2945    init_test(cx, |settings| {
 2946        settings.defaults.tab_size = NonZeroU32::new(4)
 2947    });
 2948
 2949    let language = Arc::new(
 2950        Language::new(
 2951            LanguageConfig::default(),
 2952            Some(tree_sitter_rust::LANGUAGE.into()),
 2953        )
 2954        .with_indents_query(r#"(_ "{" "}" @end) @indent"#)
 2955        .unwrap(),
 2956    );
 2957
 2958    let mut cx = EditorTestContext::new(cx).await;
 2959    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2960    cx.set_state(indoc! {"
 2961        fn a() {
 2962            if b {
 2963        \t ˇc
 2964            }
 2965        }
 2966    "});
 2967
 2968    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2969    cx.assert_editor_state(indoc! {"
 2970        fn a() {
 2971            if b {
 2972                ˇc
 2973            }
 2974        }
 2975    "});
 2976}
 2977
 2978#[gpui::test]
 2979async fn test_indent_outdent(cx: &mut TestAppContext) {
 2980    init_test(cx, |settings| {
 2981        settings.defaults.tab_size = NonZeroU32::new(4);
 2982    });
 2983
 2984    let mut cx = EditorTestContext::new(cx).await;
 2985
 2986    cx.set_state(indoc! {"
 2987          «oneˇ» «twoˇ»
 2988        three
 2989         four
 2990    "});
 2991    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 2992    cx.assert_editor_state(indoc! {"
 2993            «oneˇ» «twoˇ»
 2994        three
 2995         four
 2996    "});
 2997
 2998    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 2999    cx.assert_editor_state(indoc! {"
 3000        «oneˇ» «twoˇ»
 3001        three
 3002         four
 3003    "});
 3004
 3005    // select across line ending
 3006    cx.set_state(indoc! {"
 3007        one two
 3008        t«hree
 3009        ˇ» four
 3010    "});
 3011    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3012    cx.assert_editor_state(indoc! {"
 3013        one two
 3014            t«hree
 3015        ˇ» four
 3016    "});
 3017
 3018    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3019    cx.assert_editor_state(indoc! {"
 3020        one two
 3021        t«hree
 3022        ˇ» four
 3023    "});
 3024
 3025    // Ensure that indenting/outdenting works when the cursor is at column 0.
 3026    cx.set_state(indoc! {"
 3027        one two
 3028        ˇthree
 3029            four
 3030    "});
 3031    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3032    cx.assert_editor_state(indoc! {"
 3033        one two
 3034            ˇthree
 3035            four
 3036    "});
 3037
 3038    cx.set_state(indoc! {"
 3039        one two
 3040        ˇ    three
 3041            four
 3042    "});
 3043    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3044    cx.assert_editor_state(indoc! {"
 3045        one two
 3046        ˇthree
 3047            four
 3048    "});
 3049}
 3050
 3051#[gpui::test]
 3052async fn test_indent_outdent_with_hard_tabs(cx: &mut TestAppContext) {
 3053    init_test(cx, |settings| {
 3054        settings.defaults.hard_tabs = Some(true);
 3055    });
 3056
 3057    let mut cx = EditorTestContext::new(cx).await;
 3058
 3059    // select two ranges on one line
 3060    cx.set_state(indoc! {"
 3061        «oneˇ» «twoˇ»
 3062        three
 3063        four
 3064    "});
 3065    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3066    cx.assert_editor_state(indoc! {"
 3067        \t«oneˇ» «twoˇ»
 3068        three
 3069        four
 3070    "});
 3071    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3072    cx.assert_editor_state(indoc! {"
 3073        \t\t«oneˇ» «twoˇ»
 3074        three
 3075        four
 3076    "});
 3077    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3078    cx.assert_editor_state(indoc! {"
 3079        \t«oneˇ» «twoˇ»
 3080        three
 3081        four
 3082    "});
 3083    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3084    cx.assert_editor_state(indoc! {"
 3085        «oneˇ» «twoˇ»
 3086        three
 3087        four
 3088    "});
 3089
 3090    // select across a line ending
 3091    cx.set_state(indoc! {"
 3092        one two
 3093        t«hree
 3094        ˇ»four
 3095    "});
 3096    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3097    cx.assert_editor_state(indoc! {"
 3098        one two
 3099        \tt«hree
 3100        ˇ»four
 3101    "});
 3102    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3103    cx.assert_editor_state(indoc! {"
 3104        one two
 3105        \t\tt«hree
 3106        ˇ»four
 3107    "});
 3108    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3109    cx.assert_editor_state(indoc! {"
 3110        one two
 3111        \tt«hree
 3112        ˇ»four
 3113    "});
 3114    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3115    cx.assert_editor_state(indoc! {"
 3116        one two
 3117        t«hree
 3118        ˇ»four
 3119    "});
 3120
 3121    // Ensure that indenting/outdenting works when the cursor is at column 0.
 3122    cx.set_state(indoc! {"
 3123        one two
 3124        ˇthree
 3125        four
 3126    "});
 3127    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3128    cx.assert_editor_state(indoc! {"
 3129        one two
 3130        ˇthree
 3131        four
 3132    "});
 3133    cx.update_editor(|e, window, cx| e.tab(&Tab, window, cx));
 3134    cx.assert_editor_state(indoc! {"
 3135        one two
 3136        \tˇthree
 3137        four
 3138    "});
 3139    cx.update_editor(|e, window, cx| e.backtab(&Backtab, window, cx));
 3140    cx.assert_editor_state(indoc! {"
 3141        one two
 3142        ˇthree
 3143        four
 3144    "});
 3145}
 3146
 3147#[gpui::test]
 3148fn test_indent_outdent_with_excerpts(cx: &mut TestAppContext) {
 3149    init_test(cx, |settings| {
 3150        settings.languages.extend([
 3151            (
 3152                "TOML".into(),
 3153                LanguageSettingsContent {
 3154                    tab_size: NonZeroU32::new(2),
 3155                    ..Default::default()
 3156                },
 3157            ),
 3158            (
 3159                "Rust".into(),
 3160                LanguageSettingsContent {
 3161                    tab_size: NonZeroU32::new(4),
 3162                    ..Default::default()
 3163                },
 3164            ),
 3165        ]);
 3166    });
 3167
 3168    let toml_language = Arc::new(Language::new(
 3169        LanguageConfig {
 3170            name: "TOML".into(),
 3171            ..Default::default()
 3172        },
 3173        None,
 3174    ));
 3175    let rust_language = Arc::new(Language::new(
 3176        LanguageConfig {
 3177            name: "Rust".into(),
 3178            ..Default::default()
 3179        },
 3180        None,
 3181    ));
 3182
 3183    let toml_buffer =
 3184        cx.new(|cx| Buffer::local("a = 1\nb = 2\n", cx).with_language(toml_language, cx));
 3185    let rust_buffer =
 3186        cx.new(|cx| Buffer::local("const c: usize = 3;\n", cx).with_language(rust_language, cx));
 3187    let multibuffer = cx.new(|cx| {
 3188        let mut multibuffer = MultiBuffer::new(ReadWrite);
 3189        multibuffer.push_excerpts(
 3190            toml_buffer.clone(),
 3191            [ExcerptRange::new(Point::new(0, 0)..Point::new(2, 0))],
 3192            cx,
 3193        );
 3194        multibuffer.push_excerpts(
 3195            rust_buffer.clone(),
 3196            [ExcerptRange::new(Point::new(0, 0)..Point::new(1, 0))],
 3197            cx,
 3198        );
 3199        multibuffer
 3200    });
 3201
 3202    cx.add_window(|window, cx| {
 3203        let mut editor = build_editor(multibuffer, window, cx);
 3204
 3205        assert_eq!(
 3206            editor.text(cx),
 3207            indoc! {"
 3208                a = 1
 3209                b = 2
 3210
 3211                const c: usize = 3;
 3212            "}
 3213        );
 3214
 3215        select_ranges(
 3216            &mut editor,
 3217            indoc! {"
 3218                «aˇ» = 1
 3219                b = 2
 3220
 3221                «const c:ˇ» usize = 3;
 3222            "},
 3223            window,
 3224            cx,
 3225        );
 3226
 3227        editor.tab(&Tab, window, cx);
 3228        assert_text_with_selections(
 3229            &mut editor,
 3230            indoc! {"
 3231                  «aˇ» = 1
 3232                b = 2
 3233
 3234                    «const c:ˇ» usize = 3;
 3235            "},
 3236            cx,
 3237        );
 3238        editor.backtab(&Backtab, window, cx);
 3239        assert_text_with_selections(
 3240            &mut editor,
 3241            indoc! {"
 3242                «aˇ» = 1
 3243                b = 2
 3244
 3245                «const c:ˇ» usize = 3;
 3246            "},
 3247            cx,
 3248        );
 3249
 3250        editor
 3251    });
 3252}
 3253
 3254#[gpui::test]
 3255async fn test_backspace(cx: &mut TestAppContext) {
 3256    init_test(cx, |_| {});
 3257
 3258    let mut cx = EditorTestContext::new(cx).await;
 3259
 3260    // Basic backspace
 3261    cx.set_state(indoc! {"
 3262        onˇe two three
 3263        fou«rˇ» five six
 3264        seven «ˇeight nine
 3265        »ten
 3266    "});
 3267    cx.update_editor(|e, window, cx| e.backspace(&Backspace, window, cx));
 3268    cx.assert_editor_state(indoc! {"
 3269        oˇe two three
 3270        fouˇ five six
 3271        seven ˇten
 3272    "});
 3273
 3274    // Test backspace inside and around indents
 3275    cx.set_state(indoc! {"
 3276        zero
 3277            ˇone
 3278                ˇtwo
 3279            ˇ ˇ ˇ  three
 3280        ˇ  ˇ  four
 3281    "});
 3282    cx.update_editor(|e, window, cx| e.backspace(&Backspace, window, cx));
 3283    cx.assert_editor_state(indoc! {"
 3284        zero
 3285        ˇone
 3286            ˇtwo
 3287        ˇ  threeˇ  four
 3288    "});
 3289}
 3290
 3291#[gpui::test]
 3292async fn test_delete(cx: &mut TestAppContext) {
 3293    init_test(cx, |_| {});
 3294
 3295    let mut cx = EditorTestContext::new(cx).await;
 3296    cx.set_state(indoc! {"
 3297        onˇe two three
 3298        fou«rˇ» five six
 3299        seven «ˇeight nine
 3300        »ten
 3301    "});
 3302    cx.update_editor(|e, window, cx| e.delete(&Delete, window, cx));
 3303    cx.assert_editor_state(indoc! {"
 3304        onˇ two three
 3305        fouˇ five six
 3306        seven ˇten
 3307    "});
 3308}
 3309
 3310#[gpui::test]
 3311fn test_delete_line(cx: &mut TestAppContext) {
 3312    init_test(cx, |_| {});
 3313
 3314    let editor = cx.add_window(|window, cx| {
 3315        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3316        build_editor(buffer, window, cx)
 3317    });
 3318    _ = editor.update(cx, |editor, window, cx| {
 3319        editor.change_selections(None, window, cx, |s| {
 3320            s.select_display_ranges([
 3321                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 3322                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 3323                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 3324            ])
 3325        });
 3326        editor.delete_line(&DeleteLine, window, cx);
 3327        assert_eq!(editor.display_text(cx), "ghi");
 3328        assert_eq!(
 3329            editor.selections.display_ranges(cx),
 3330            vec![
 3331                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 3332                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1)
 3333            ]
 3334        );
 3335    });
 3336
 3337    let editor = cx.add_window(|window, cx| {
 3338        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3339        build_editor(buffer, window, cx)
 3340    });
 3341    _ = editor.update(cx, |editor, window, cx| {
 3342        editor.change_selections(None, window, cx, |s| {
 3343            s.select_display_ranges([
 3344                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(0), 1)
 3345            ])
 3346        });
 3347        editor.delete_line(&DeleteLine, window, cx);
 3348        assert_eq!(editor.display_text(cx), "ghi\n");
 3349        assert_eq!(
 3350            editor.selections.display_ranges(cx),
 3351            vec![DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1)]
 3352        );
 3353    });
 3354}
 3355
 3356#[gpui::test]
 3357fn test_join_lines_with_single_selection(cx: &mut TestAppContext) {
 3358    init_test(cx, |_| {});
 3359
 3360    cx.add_window(|window, cx| {
 3361        let buffer = MultiBuffer::build_simple("aaa\nbbb\nccc\nddd\n\n", cx);
 3362        let mut editor = build_editor(buffer.clone(), window, cx);
 3363        let buffer = buffer.read(cx).as_singleton().unwrap();
 3364
 3365        assert_eq!(
 3366            editor.selections.ranges::<Point>(cx),
 3367            &[Point::new(0, 0)..Point::new(0, 0)]
 3368        );
 3369
 3370        // When on single line, replace newline at end by space
 3371        editor.join_lines(&JoinLines, window, cx);
 3372        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n\n");
 3373        assert_eq!(
 3374            editor.selections.ranges::<Point>(cx),
 3375            &[Point::new(0, 3)..Point::new(0, 3)]
 3376        );
 3377
 3378        // When multiple lines are selected, remove newlines that are spanned by the selection
 3379        editor.change_selections(None, window, cx, |s| {
 3380            s.select_ranges([Point::new(0, 5)..Point::new(2, 2)])
 3381        });
 3382        editor.join_lines(&JoinLines, window, cx);
 3383        assert_eq!(buffer.read(cx).text(), "aaa bbb ccc ddd\n\n");
 3384        assert_eq!(
 3385            editor.selections.ranges::<Point>(cx),
 3386            &[Point::new(0, 11)..Point::new(0, 11)]
 3387        );
 3388
 3389        // Undo should be transactional
 3390        editor.undo(&Undo, window, cx);
 3391        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n\n");
 3392        assert_eq!(
 3393            editor.selections.ranges::<Point>(cx),
 3394            &[Point::new(0, 5)..Point::new(2, 2)]
 3395        );
 3396
 3397        // When joining an empty line don't insert a space
 3398        editor.change_selections(None, window, cx, |s| {
 3399            s.select_ranges([Point::new(2, 1)..Point::new(2, 2)])
 3400        });
 3401        editor.join_lines(&JoinLines, window, cx);
 3402        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n");
 3403        assert_eq!(
 3404            editor.selections.ranges::<Point>(cx),
 3405            [Point::new(2, 3)..Point::new(2, 3)]
 3406        );
 3407
 3408        // We can remove trailing newlines
 3409        editor.join_lines(&JoinLines, window, cx);
 3410        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd");
 3411        assert_eq!(
 3412            editor.selections.ranges::<Point>(cx),
 3413            [Point::new(2, 3)..Point::new(2, 3)]
 3414        );
 3415
 3416        // We don't blow up on the last line
 3417        editor.join_lines(&JoinLines, window, cx);
 3418        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd");
 3419        assert_eq!(
 3420            editor.selections.ranges::<Point>(cx),
 3421            [Point::new(2, 3)..Point::new(2, 3)]
 3422        );
 3423
 3424        // reset to test indentation
 3425        editor.buffer.update(cx, |buffer, cx| {
 3426            buffer.edit(
 3427                [
 3428                    (Point::new(1, 0)..Point::new(1, 2), "  "),
 3429                    (Point::new(2, 0)..Point::new(2, 3), "  \n\td"),
 3430                ],
 3431                None,
 3432                cx,
 3433            )
 3434        });
 3435
 3436        // We remove any leading spaces
 3437        assert_eq!(buffer.read(cx).text(), "aaa bbb\n  c\n  \n\td");
 3438        editor.change_selections(None, window, cx, |s| {
 3439            s.select_ranges([Point::new(0, 1)..Point::new(0, 1)])
 3440        });
 3441        editor.join_lines(&JoinLines, window, cx);
 3442        assert_eq!(buffer.read(cx).text(), "aaa bbb c\n  \n\td");
 3443
 3444        // We don't insert a space for a line containing only spaces
 3445        editor.join_lines(&JoinLines, window, cx);
 3446        assert_eq!(buffer.read(cx).text(), "aaa bbb c\n\td");
 3447
 3448        // We ignore any leading tabs
 3449        editor.join_lines(&JoinLines, window, cx);
 3450        assert_eq!(buffer.read(cx).text(), "aaa bbb c d");
 3451
 3452        editor
 3453    });
 3454}
 3455
 3456#[gpui::test]
 3457fn test_join_lines_with_multi_selection(cx: &mut TestAppContext) {
 3458    init_test(cx, |_| {});
 3459
 3460    cx.add_window(|window, cx| {
 3461        let buffer = MultiBuffer::build_simple("aaa\nbbb\nccc\nddd\n\n", cx);
 3462        let mut editor = build_editor(buffer.clone(), window, cx);
 3463        let buffer = buffer.read(cx).as_singleton().unwrap();
 3464
 3465        editor.change_selections(None, window, cx, |s| {
 3466            s.select_ranges([
 3467                Point::new(0, 2)..Point::new(1, 1),
 3468                Point::new(1, 2)..Point::new(1, 2),
 3469                Point::new(3, 1)..Point::new(3, 2),
 3470            ])
 3471        });
 3472
 3473        editor.join_lines(&JoinLines, window, cx);
 3474        assert_eq!(buffer.read(cx).text(), "aaa bbb ccc\nddd\n");
 3475
 3476        assert_eq!(
 3477            editor.selections.ranges::<Point>(cx),
 3478            [
 3479                Point::new(0, 7)..Point::new(0, 7),
 3480                Point::new(1, 3)..Point::new(1, 3)
 3481            ]
 3482        );
 3483        editor
 3484    });
 3485}
 3486
 3487#[gpui::test]
 3488async fn test_join_lines_with_git_diff_base(executor: BackgroundExecutor, cx: &mut TestAppContext) {
 3489    init_test(cx, |_| {});
 3490
 3491    let mut cx = EditorTestContext::new(cx).await;
 3492
 3493    let diff_base = r#"
 3494        Line 0
 3495        Line 1
 3496        Line 2
 3497        Line 3
 3498        "#
 3499    .unindent();
 3500
 3501    cx.set_state(
 3502        &r#"
 3503        ˇLine 0
 3504        Line 1
 3505        Line 2
 3506        Line 3
 3507        "#
 3508        .unindent(),
 3509    );
 3510
 3511    cx.set_head_text(&diff_base);
 3512    executor.run_until_parked();
 3513
 3514    // Join lines
 3515    cx.update_editor(|editor, window, cx| {
 3516        editor.join_lines(&JoinLines, window, cx);
 3517    });
 3518    executor.run_until_parked();
 3519
 3520    cx.assert_editor_state(
 3521        &r#"
 3522        Line 0ˇ Line 1
 3523        Line 2
 3524        Line 3
 3525        "#
 3526        .unindent(),
 3527    );
 3528    // Join again
 3529    cx.update_editor(|editor, window, cx| {
 3530        editor.join_lines(&JoinLines, window, cx);
 3531    });
 3532    executor.run_until_parked();
 3533
 3534    cx.assert_editor_state(
 3535        &r#"
 3536        Line 0 Line 1ˇ Line 2
 3537        Line 3
 3538        "#
 3539        .unindent(),
 3540    );
 3541}
 3542
 3543#[gpui::test]
 3544async fn test_custom_newlines_cause_no_false_positive_diffs(
 3545    executor: BackgroundExecutor,
 3546    cx: &mut TestAppContext,
 3547) {
 3548    init_test(cx, |_| {});
 3549    let mut cx = EditorTestContext::new(cx).await;
 3550    cx.set_state("Line 0\r\nLine 1\rˇ\nLine 2\r\nLine 3");
 3551    cx.set_head_text("Line 0\r\nLine 1\r\nLine 2\r\nLine 3");
 3552    executor.run_until_parked();
 3553
 3554    cx.update_editor(|editor, window, cx| {
 3555        let snapshot = editor.snapshot(window, cx);
 3556        assert_eq!(
 3557            snapshot
 3558                .buffer_snapshot
 3559                .diff_hunks_in_range(0..snapshot.buffer_snapshot.len())
 3560                .collect::<Vec<_>>(),
 3561            Vec::new(),
 3562            "Should not have any diffs for files with custom newlines"
 3563        );
 3564    });
 3565}
 3566
 3567#[gpui::test]
 3568async fn test_manipulate_lines_with_single_selection(cx: &mut TestAppContext) {
 3569    init_test(cx, |_| {});
 3570
 3571    let mut cx = EditorTestContext::new(cx).await;
 3572
 3573    // Test sort_lines_case_insensitive()
 3574    cx.set_state(indoc! {"
 3575        «z
 3576        y
 3577        x
 3578        Z
 3579        Y
 3580        Xˇ»
 3581    "});
 3582    cx.update_editor(|e, window, cx| {
 3583        e.sort_lines_case_insensitive(&SortLinesCaseInsensitive, window, cx)
 3584    });
 3585    cx.assert_editor_state(indoc! {"
 3586        «x
 3587        X
 3588        y
 3589        Y
 3590        z
 3591        Zˇ»
 3592    "});
 3593
 3594    // Test reverse_lines()
 3595    cx.set_state(indoc! {"
 3596        «5
 3597        4
 3598        3
 3599        2
 3600        1ˇ»
 3601    "});
 3602    cx.update_editor(|e, window, cx| e.reverse_lines(&ReverseLines, window, cx));
 3603    cx.assert_editor_state(indoc! {"
 3604        «1
 3605        2
 3606        3
 3607        4
 3608        5ˇ»
 3609    "});
 3610
 3611    // Skip testing shuffle_line()
 3612
 3613    // From here on out, test more complex cases of manipulate_lines() with a single driver method: sort_lines_case_sensitive()
 3614    // Since all methods calling manipulate_lines() are doing the exact same general thing (reordering lines)
 3615
 3616    // Don't manipulate when cursor is on single line, but expand the selection
 3617    cx.set_state(indoc! {"
 3618        ddˇdd
 3619        ccc
 3620        bb
 3621        a
 3622    "});
 3623    cx.update_editor(|e, window, cx| {
 3624        e.sort_lines_case_sensitive(&SortLinesCaseSensitive, window, cx)
 3625    });
 3626    cx.assert_editor_state(indoc! {"
 3627        «ddddˇ»
 3628        ccc
 3629        bb
 3630        a
 3631    "});
 3632
 3633    // Basic manipulate case
 3634    // Start selection moves to column 0
 3635    // End of selection shrinks to fit shorter line
 3636    cx.set_state(indoc! {"
 3637        dd«d
 3638        ccc
 3639        bb
 3640        aaaaaˇ»
 3641    "});
 3642    cx.update_editor(|e, window, cx| {
 3643        e.sort_lines_case_sensitive(&SortLinesCaseSensitive, window, cx)
 3644    });
 3645    cx.assert_editor_state(indoc! {"
 3646        «aaaaa
 3647        bb
 3648        ccc
 3649        dddˇ»
 3650    "});
 3651
 3652    // Manipulate case with newlines
 3653    cx.set_state(indoc! {"
 3654        dd«d
 3655        ccc
 3656
 3657        bb
 3658        aaaaa
 3659
 3660        ˇ»
 3661    "});
 3662    cx.update_editor(|e, window, cx| {
 3663        e.sort_lines_case_sensitive(&SortLinesCaseSensitive, window, cx)
 3664    });
 3665    cx.assert_editor_state(indoc! {"
 3666        «
 3667
 3668        aaaaa
 3669        bb
 3670        ccc
 3671        dddˇ»
 3672
 3673    "});
 3674
 3675    // Adding new line
 3676    cx.set_state(indoc! {"
 3677        aa«a
 3678        bbˇ»b
 3679    "});
 3680    cx.update_editor(|e, window, cx| {
 3681        e.manipulate_lines(window, cx, |lines| lines.push("added_line"))
 3682    });
 3683    cx.assert_editor_state(indoc! {"
 3684        «aaa
 3685        bbb
 3686        added_lineˇ»
 3687    "});
 3688
 3689    // Removing line
 3690    cx.set_state(indoc! {"
 3691        aa«a
 3692        bbbˇ»
 3693    "});
 3694    cx.update_editor(|e, window, cx| {
 3695        e.manipulate_lines(window, cx, |lines| {
 3696            lines.pop();
 3697        })
 3698    });
 3699    cx.assert_editor_state(indoc! {"
 3700        «aaaˇ»
 3701    "});
 3702
 3703    // Removing all lines
 3704    cx.set_state(indoc! {"
 3705        aa«a
 3706        bbbˇ»
 3707    "});
 3708    cx.update_editor(|e, window, cx| {
 3709        e.manipulate_lines(window, cx, |lines| {
 3710            lines.drain(..);
 3711        })
 3712    });
 3713    cx.assert_editor_state(indoc! {"
 3714        ˇ
 3715    "});
 3716}
 3717
 3718#[gpui::test]
 3719async fn test_unique_lines_multi_selection(cx: &mut TestAppContext) {
 3720    init_test(cx, |_| {});
 3721
 3722    let mut cx = EditorTestContext::new(cx).await;
 3723
 3724    // Consider continuous selection as single selection
 3725    cx.set_state(indoc! {"
 3726        Aaa«aa
 3727        cˇ»c«c
 3728        bb
 3729        aaaˇ»aa
 3730    "});
 3731    cx.update_editor(|e, window, cx| {
 3732        e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, window, cx)
 3733    });
 3734    cx.assert_editor_state(indoc! {"
 3735        «Aaaaa
 3736        ccc
 3737        bb
 3738        aaaaaˇ»
 3739    "});
 3740
 3741    cx.set_state(indoc! {"
 3742        Aaa«aa
 3743        cˇ»c«c
 3744        bb
 3745        aaaˇ»aa
 3746    "});
 3747    cx.update_editor(|e, window, cx| {
 3748        e.unique_lines_case_insensitive(&UniqueLinesCaseInsensitive, window, cx)
 3749    });
 3750    cx.assert_editor_state(indoc! {"
 3751        «Aaaaa
 3752        ccc
 3753        bbˇ»
 3754    "});
 3755
 3756    // Consider non continuous selection as distinct dedup operations
 3757    cx.set_state(indoc! {"
 3758        «aaaaa
 3759        bb
 3760        aaaaa
 3761        aaaaaˇ»
 3762
 3763        aaa«aaˇ»
 3764    "});
 3765    cx.update_editor(|e, window, cx| {
 3766        e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, window, cx)
 3767    });
 3768    cx.assert_editor_state(indoc! {"
 3769        «aaaaa
 3770        bbˇ»
 3771
 3772        «aaaaaˇ»
 3773    "});
 3774}
 3775
 3776#[gpui::test]
 3777async fn test_unique_lines_single_selection(cx: &mut TestAppContext) {
 3778    init_test(cx, |_| {});
 3779
 3780    let mut cx = EditorTestContext::new(cx).await;
 3781
 3782    cx.set_state(indoc! {"
 3783        «Aaa
 3784        aAa
 3785        Aaaˇ»
 3786    "});
 3787    cx.update_editor(|e, window, cx| {
 3788        e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, window, cx)
 3789    });
 3790    cx.assert_editor_state(indoc! {"
 3791        «Aaa
 3792        aAaˇ»
 3793    "});
 3794
 3795    cx.set_state(indoc! {"
 3796        «Aaa
 3797        aAa
 3798        aaAˇ»
 3799    "});
 3800    cx.update_editor(|e, window, cx| {
 3801        e.unique_lines_case_insensitive(&UniqueLinesCaseInsensitive, window, cx)
 3802    });
 3803    cx.assert_editor_state(indoc! {"
 3804        «Aaaˇ»
 3805    "});
 3806}
 3807
 3808#[gpui::test]
 3809async fn test_manipulate_lines_with_multi_selection(cx: &mut TestAppContext) {
 3810    init_test(cx, |_| {});
 3811
 3812    let mut cx = EditorTestContext::new(cx).await;
 3813
 3814    // Manipulate with multiple selections on a single line
 3815    cx.set_state(indoc! {"
 3816        dd«dd
 3817        cˇ»c«c
 3818        bb
 3819        aaaˇ»aa
 3820    "});
 3821    cx.update_editor(|e, window, cx| {
 3822        e.sort_lines_case_sensitive(&SortLinesCaseSensitive, window, cx)
 3823    });
 3824    cx.assert_editor_state(indoc! {"
 3825        «aaaaa
 3826        bb
 3827        ccc
 3828        ddddˇ»
 3829    "});
 3830
 3831    // Manipulate with multiple disjoin selections
 3832    cx.set_state(indoc! {"
 3833 3834        4
 3835        3
 3836        2
 3837        1ˇ»
 3838
 3839        dd«dd
 3840        ccc
 3841        bb
 3842        aaaˇ»aa
 3843    "});
 3844    cx.update_editor(|e, window, cx| {
 3845        e.sort_lines_case_sensitive(&SortLinesCaseSensitive, window, cx)
 3846    });
 3847    cx.assert_editor_state(indoc! {"
 3848        «1
 3849        2
 3850        3
 3851        4
 3852        5ˇ»
 3853
 3854        «aaaaa
 3855        bb
 3856        ccc
 3857        ddddˇ»
 3858    "});
 3859
 3860    // Adding lines on each selection
 3861    cx.set_state(indoc! {"
 3862 3863        1ˇ»
 3864
 3865        bb«bb
 3866        aaaˇ»aa
 3867    "});
 3868    cx.update_editor(|e, window, cx| {
 3869        e.manipulate_lines(window, cx, |lines| lines.push("added line"))
 3870    });
 3871    cx.assert_editor_state(indoc! {"
 3872        «2
 3873        1
 3874        added lineˇ»
 3875
 3876        «bbbb
 3877        aaaaa
 3878        added lineˇ»
 3879    "});
 3880
 3881    // Removing lines on each selection
 3882    cx.set_state(indoc! {"
 3883 3884        1ˇ»
 3885
 3886        bb«bb
 3887        aaaˇ»aa
 3888    "});
 3889    cx.update_editor(|e, window, cx| {
 3890        e.manipulate_lines(window, cx, |lines| {
 3891            lines.pop();
 3892        })
 3893    });
 3894    cx.assert_editor_state(indoc! {"
 3895        «2ˇ»
 3896
 3897        «bbbbˇ»
 3898    "});
 3899}
 3900
 3901#[gpui::test]
 3902async fn test_toggle_case(cx: &mut TestAppContext) {
 3903    init_test(cx, |_| {});
 3904
 3905    let mut cx = EditorTestContext::new(cx).await;
 3906
 3907    // If all lower case -> upper case
 3908    cx.set_state(indoc! {"
 3909        «hello worldˇ»
 3910    "});
 3911    cx.update_editor(|e, window, cx| e.toggle_case(&ToggleCase, window, cx));
 3912    cx.assert_editor_state(indoc! {"
 3913        «HELLO WORLDˇ»
 3914    "});
 3915
 3916    // If all upper case -> lower case
 3917    cx.set_state(indoc! {"
 3918        «HELLO WORLDˇ»
 3919    "});
 3920    cx.update_editor(|e, window, cx| e.toggle_case(&ToggleCase, window, cx));
 3921    cx.assert_editor_state(indoc! {"
 3922        «hello worldˇ»
 3923    "});
 3924
 3925    // If any upper case characters are identified -> lower case
 3926    // This matches JetBrains IDEs
 3927    cx.set_state(indoc! {"
 3928        «hEllo worldˇ»
 3929    "});
 3930    cx.update_editor(|e, window, cx| e.toggle_case(&ToggleCase, window, cx));
 3931    cx.assert_editor_state(indoc! {"
 3932        «hello worldˇ»
 3933    "});
 3934}
 3935
 3936#[gpui::test]
 3937async fn test_manipulate_text(cx: &mut TestAppContext) {
 3938    init_test(cx, |_| {});
 3939
 3940    let mut cx = EditorTestContext::new(cx).await;
 3941
 3942    // Test convert_to_upper_case()
 3943    cx.set_state(indoc! {"
 3944        «hello worldˇ»
 3945    "});
 3946    cx.update_editor(|e, window, cx| e.convert_to_upper_case(&ConvertToUpperCase, window, cx));
 3947    cx.assert_editor_state(indoc! {"
 3948        «HELLO WORLDˇ»
 3949    "});
 3950
 3951    // Test convert_to_lower_case()
 3952    cx.set_state(indoc! {"
 3953        «HELLO WORLDˇ»
 3954    "});
 3955    cx.update_editor(|e, window, cx| e.convert_to_lower_case(&ConvertToLowerCase, window, cx));
 3956    cx.assert_editor_state(indoc! {"
 3957        «hello worldˇ»
 3958    "});
 3959
 3960    // Test multiple line, single selection case
 3961    cx.set_state(indoc! {"
 3962        «The quick brown
 3963        fox jumps over
 3964        the lazy dogˇ»
 3965    "});
 3966    cx.update_editor(|e, window, cx| e.convert_to_title_case(&ConvertToTitleCase, window, cx));
 3967    cx.assert_editor_state(indoc! {"
 3968        «The Quick Brown
 3969        Fox Jumps Over
 3970        The Lazy Dogˇ»
 3971    "});
 3972
 3973    // Test multiple line, single selection case
 3974    cx.set_state(indoc! {"
 3975        «The quick brown
 3976        fox jumps over
 3977        the lazy dogˇ»
 3978    "});
 3979    cx.update_editor(|e, window, cx| {
 3980        e.convert_to_upper_camel_case(&ConvertToUpperCamelCase, window, cx)
 3981    });
 3982    cx.assert_editor_state(indoc! {"
 3983        «TheQuickBrown
 3984        FoxJumpsOver
 3985        TheLazyDogˇ»
 3986    "});
 3987
 3988    // From here on out, test more complex cases of manipulate_text()
 3989
 3990    // Test no selection case - should affect words cursors are in
 3991    // Cursor at beginning, middle, and end of word
 3992    cx.set_state(indoc! {"
 3993        ˇhello big beauˇtiful worldˇ
 3994    "});
 3995    cx.update_editor(|e, window, cx| e.convert_to_upper_case(&ConvertToUpperCase, window, cx));
 3996    cx.assert_editor_state(indoc! {"
 3997        «HELLOˇ» big «BEAUTIFULˇ» «WORLDˇ»
 3998    "});
 3999
 4000    // Test multiple selections on a single line and across multiple lines
 4001    cx.set_state(indoc! {"
 4002        «Theˇ» quick «brown
 4003        foxˇ» jumps «overˇ»
 4004        the «lazyˇ» dog
 4005    "});
 4006    cx.update_editor(|e, window, cx| e.convert_to_upper_case(&ConvertToUpperCase, window, cx));
 4007    cx.assert_editor_state(indoc! {"
 4008        «THEˇ» quick «BROWN
 4009        FOXˇ» jumps «OVERˇ»
 4010        the «LAZYˇ» dog
 4011    "});
 4012
 4013    // Test case where text length grows
 4014    cx.set_state(indoc! {"
 4015        «tschüߡ»
 4016    "});
 4017    cx.update_editor(|e, window, cx| e.convert_to_upper_case(&ConvertToUpperCase, window, cx));
 4018    cx.assert_editor_state(indoc! {"
 4019        «TSCHÜSSˇ»
 4020    "});
 4021
 4022    // Test to make sure we don't crash when text shrinks
 4023    cx.set_state(indoc! {"
 4024        aaa_bbbˇ
 4025    "});
 4026    cx.update_editor(|e, window, cx| {
 4027        e.convert_to_lower_camel_case(&ConvertToLowerCamelCase, window, cx)
 4028    });
 4029    cx.assert_editor_state(indoc! {"
 4030        «aaaBbbˇ»
 4031    "});
 4032
 4033    // Test to make sure we all aware of the fact that each word can grow and shrink
 4034    // Final selections should be aware of this fact
 4035    cx.set_state(indoc! {"
 4036        aaa_bˇbb bbˇb_ccc ˇccc_ddd
 4037    "});
 4038    cx.update_editor(|e, window, cx| {
 4039        e.convert_to_lower_camel_case(&ConvertToLowerCamelCase, window, cx)
 4040    });
 4041    cx.assert_editor_state(indoc! {"
 4042        «aaaBbbˇ» «bbbCccˇ» «cccDddˇ»
 4043    "});
 4044
 4045    cx.set_state(indoc! {"
 4046        «hElLo, WoRld!ˇ»
 4047    "});
 4048    cx.update_editor(|e, window, cx| {
 4049        e.convert_to_opposite_case(&ConvertToOppositeCase, window, cx)
 4050    });
 4051    cx.assert_editor_state(indoc! {"
 4052        «HeLlO, wOrLD!ˇ»
 4053    "});
 4054}
 4055
 4056#[gpui::test]
 4057fn test_duplicate_line(cx: &mut TestAppContext) {
 4058    init_test(cx, |_| {});
 4059
 4060    let editor = cx.add_window(|window, cx| {
 4061        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 4062        build_editor(buffer, window, cx)
 4063    });
 4064    _ = editor.update(cx, |editor, window, cx| {
 4065        editor.change_selections(None, window, cx, |s| {
 4066            s.select_display_ranges([
 4067                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 4068                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4069                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 4070                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 4071            ])
 4072        });
 4073        editor.duplicate_line_down(&DuplicateLineDown, window, cx);
 4074        assert_eq!(editor.display_text(cx), "abc\nabc\ndef\ndef\nghi\n\n");
 4075        assert_eq!(
 4076            editor.selections.display_ranges(cx),
 4077            vec![
 4078                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 4079                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 4080                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 4081                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(6), 0),
 4082            ]
 4083        );
 4084    });
 4085
 4086    let editor = cx.add_window(|window, cx| {
 4087        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 4088        build_editor(buffer, window, cx)
 4089    });
 4090    _ = editor.update(cx, |editor, window, cx| {
 4091        editor.change_selections(None, window, cx, |s| {
 4092            s.select_display_ranges([
 4093                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4094                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 4095            ])
 4096        });
 4097        editor.duplicate_line_down(&DuplicateLineDown, window, cx);
 4098        assert_eq!(editor.display_text(cx), "abc\ndef\nghi\nabc\ndef\nghi\n");
 4099        assert_eq!(
 4100            editor.selections.display_ranges(cx),
 4101            vec![
 4102                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(4), 1),
 4103                DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(5), 1),
 4104            ]
 4105        );
 4106    });
 4107
 4108    // With `move_upwards` the selections stay in place, except for
 4109    // the lines inserted above them
 4110    let editor = cx.add_window(|window, cx| {
 4111        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 4112        build_editor(buffer, window, cx)
 4113    });
 4114    _ = editor.update(cx, |editor, window, cx| {
 4115        editor.change_selections(None, window, cx, |s| {
 4116            s.select_display_ranges([
 4117                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 4118                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4119                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 4120                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 4121            ])
 4122        });
 4123        editor.duplicate_line_up(&DuplicateLineUp, window, cx);
 4124        assert_eq!(editor.display_text(cx), "abc\nabc\ndef\ndef\nghi\n\n");
 4125        assert_eq!(
 4126            editor.selections.display_ranges(cx),
 4127            vec![
 4128                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 4129                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4130                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 0),
 4131                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(6), 0),
 4132            ]
 4133        );
 4134    });
 4135
 4136    let editor = cx.add_window(|window, cx| {
 4137        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 4138        build_editor(buffer, window, cx)
 4139    });
 4140    _ = editor.update(cx, |editor, window, cx| {
 4141        editor.change_selections(None, window, cx, |s| {
 4142            s.select_display_ranges([
 4143                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4144                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 4145            ])
 4146        });
 4147        editor.duplicate_line_up(&DuplicateLineUp, window, cx);
 4148        assert_eq!(editor.display_text(cx), "abc\ndef\nghi\nabc\ndef\nghi\n");
 4149        assert_eq!(
 4150            editor.selections.display_ranges(cx),
 4151            vec![
 4152                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4153                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 4154            ]
 4155        );
 4156    });
 4157
 4158    let editor = cx.add_window(|window, cx| {
 4159        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 4160        build_editor(buffer, window, cx)
 4161    });
 4162    _ = editor.update(cx, |editor, window, cx| {
 4163        editor.change_selections(None, window, cx, |s| {
 4164            s.select_display_ranges([
 4165                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4166                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 4167            ])
 4168        });
 4169        editor.duplicate_selection(&DuplicateSelection, window, cx);
 4170        assert_eq!(editor.display_text(cx), "abc\ndbc\ndef\ngf\nghi\n");
 4171        assert_eq!(
 4172            editor.selections.display_ranges(cx),
 4173            vec![
 4174                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4175                DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 1),
 4176            ]
 4177        );
 4178    });
 4179}
 4180
 4181#[gpui::test]
 4182fn test_move_line_up_down(cx: &mut TestAppContext) {
 4183    init_test(cx, |_| {});
 4184
 4185    let editor = cx.add_window(|window, cx| {
 4186        let buffer = MultiBuffer::build_simple(&sample_text(10, 5, 'a'), cx);
 4187        build_editor(buffer, window, cx)
 4188    });
 4189    _ = editor.update(cx, |editor, window, cx| {
 4190        editor.fold_creases(
 4191            vec![
 4192                Crease::simple(Point::new(0, 2)..Point::new(1, 2), FoldPlaceholder::test()),
 4193                Crease::simple(Point::new(2, 3)..Point::new(4, 1), FoldPlaceholder::test()),
 4194                Crease::simple(Point::new(7, 0)..Point::new(8, 4), FoldPlaceholder::test()),
 4195            ],
 4196            true,
 4197            window,
 4198            cx,
 4199        );
 4200        editor.change_selections(None, window, cx, |s| {
 4201            s.select_display_ranges([
 4202                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 4203                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 4204                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 4205                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2),
 4206            ])
 4207        });
 4208        assert_eq!(
 4209            editor.display_text(cx),
 4210            "aa⋯bbb\nccc⋯eeee\nfffff\nggggg\n⋯i\njjjjj"
 4211        );
 4212
 4213        editor.move_line_up(&MoveLineUp, window, cx);
 4214        assert_eq!(
 4215            editor.display_text(cx),
 4216            "aa⋯bbb\nccc⋯eeee\nggggg\n⋯i\njjjjj\nfffff"
 4217        );
 4218        assert_eq!(
 4219            editor.selections.display_ranges(cx),
 4220            vec![
 4221                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 4222                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 4223                DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3),
 4224                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(4), 2)
 4225            ]
 4226        );
 4227    });
 4228
 4229    _ = editor.update(cx, |editor, window, cx| {
 4230        editor.move_line_down(&MoveLineDown, window, cx);
 4231        assert_eq!(
 4232            editor.display_text(cx),
 4233            "ccc⋯eeee\naa⋯bbb\nfffff\nggggg\n⋯i\njjjjj"
 4234        );
 4235        assert_eq!(
 4236            editor.selections.display_ranges(cx),
 4237            vec![
 4238                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4239                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 4240                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 4241                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2)
 4242            ]
 4243        );
 4244    });
 4245
 4246    _ = editor.update(cx, |editor, window, cx| {
 4247        editor.move_line_down(&MoveLineDown, window, cx);
 4248        assert_eq!(
 4249            editor.display_text(cx),
 4250            "ccc⋯eeee\nfffff\naa⋯bbb\nggggg\n⋯i\njjjjj"
 4251        );
 4252        assert_eq!(
 4253            editor.selections.display_ranges(cx),
 4254            vec![
 4255                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 4256                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 4257                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 4258                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2)
 4259            ]
 4260        );
 4261    });
 4262
 4263    _ = editor.update(cx, |editor, window, cx| {
 4264        editor.move_line_up(&MoveLineUp, window, cx);
 4265        assert_eq!(
 4266            editor.display_text(cx),
 4267            "ccc⋯eeee\naa⋯bbb\nggggg\n⋯i\njjjjj\nfffff"
 4268        );
 4269        assert_eq!(
 4270            editor.selections.display_ranges(cx),
 4271            vec![
 4272                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 4273                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 4274                DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3),
 4275                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(4), 2)
 4276            ]
 4277        );
 4278    });
 4279}
 4280
 4281#[gpui::test]
 4282fn test_move_line_up_down_with_blocks(cx: &mut TestAppContext) {
 4283    init_test(cx, |_| {});
 4284
 4285    let editor = cx.add_window(|window, cx| {
 4286        let buffer = MultiBuffer::build_simple(&sample_text(10, 5, 'a'), cx);
 4287        build_editor(buffer, window, cx)
 4288    });
 4289    _ = editor.update(cx, |editor, window, cx| {
 4290        let snapshot = editor.buffer.read(cx).snapshot(cx);
 4291        editor.insert_blocks(
 4292            [BlockProperties {
 4293                style: BlockStyle::Fixed,
 4294                placement: BlockPlacement::Below(snapshot.anchor_after(Point::new(2, 0))),
 4295                height: Some(1),
 4296                render: Arc::new(|_| div().into_any()),
 4297                priority: 0,
 4298            }],
 4299            Some(Autoscroll::fit()),
 4300            cx,
 4301        );
 4302        editor.change_selections(None, window, cx, |s| {
 4303            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
 4304        });
 4305        editor.move_line_down(&MoveLineDown, window, cx);
 4306    });
 4307}
 4308
 4309#[gpui::test]
 4310async fn test_selections_and_replace_blocks(cx: &mut TestAppContext) {
 4311    init_test(cx, |_| {});
 4312
 4313    let mut cx = EditorTestContext::new(cx).await;
 4314    cx.set_state(
 4315        &"
 4316            ˇzero
 4317            one
 4318            two
 4319            three
 4320            four
 4321            five
 4322        "
 4323        .unindent(),
 4324    );
 4325
 4326    // Create a four-line block that replaces three lines of text.
 4327    cx.update_editor(|editor, window, cx| {
 4328        let snapshot = editor.snapshot(window, cx);
 4329        let snapshot = &snapshot.buffer_snapshot;
 4330        let placement = BlockPlacement::Replace(
 4331            snapshot.anchor_after(Point::new(1, 0))..=snapshot.anchor_after(Point::new(3, 0)),
 4332        );
 4333        editor.insert_blocks(
 4334            [BlockProperties {
 4335                placement,
 4336                height: Some(4),
 4337                style: BlockStyle::Sticky,
 4338                render: Arc::new(|_| gpui::div().into_any_element()),
 4339                priority: 0,
 4340            }],
 4341            None,
 4342            cx,
 4343        );
 4344    });
 4345
 4346    // Move down so that the cursor touches the block.
 4347    cx.update_editor(|editor, window, cx| {
 4348        editor.move_down(&Default::default(), window, cx);
 4349    });
 4350    cx.assert_editor_state(
 4351        &"
 4352            zero
 4353            «one
 4354            two
 4355            threeˇ»
 4356            four
 4357            five
 4358        "
 4359        .unindent(),
 4360    );
 4361
 4362    // Move down past the block.
 4363    cx.update_editor(|editor, window, cx| {
 4364        editor.move_down(&Default::default(), window, cx);
 4365    });
 4366    cx.assert_editor_state(
 4367        &"
 4368            zero
 4369            one
 4370            two
 4371            three
 4372            ˇfour
 4373            five
 4374        "
 4375        .unindent(),
 4376    );
 4377}
 4378
 4379#[gpui::test]
 4380fn test_transpose(cx: &mut TestAppContext) {
 4381    init_test(cx, |_| {});
 4382
 4383    _ = cx.add_window(|window, cx| {
 4384        let mut editor = build_editor(MultiBuffer::build_simple("abc", cx), window, cx);
 4385        editor.set_style(EditorStyle::default(), window, cx);
 4386        editor.change_selections(None, window, cx, |s| s.select_ranges([1..1]));
 4387        editor.transpose(&Default::default(), window, cx);
 4388        assert_eq!(editor.text(cx), "bac");
 4389        assert_eq!(editor.selections.ranges(cx), [2..2]);
 4390
 4391        editor.transpose(&Default::default(), window, cx);
 4392        assert_eq!(editor.text(cx), "bca");
 4393        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4394
 4395        editor.transpose(&Default::default(), window, cx);
 4396        assert_eq!(editor.text(cx), "bac");
 4397        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4398
 4399        editor
 4400    });
 4401
 4402    _ = cx.add_window(|window, cx| {
 4403        let mut editor = build_editor(MultiBuffer::build_simple("abc\nde", cx), window, cx);
 4404        editor.set_style(EditorStyle::default(), window, cx);
 4405        editor.change_selections(None, window, cx, |s| s.select_ranges([3..3]));
 4406        editor.transpose(&Default::default(), window, cx);
 4407        assert_eq!(editor.text(cx), "acb\nde");
 4408        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4409
 4410        editor.change_selections(None, window, cx, |s| s.select_ranges([4..4]));
 4411        editor.transpose(&Default::default(), window, cx);
 4412        assert_eq!(editor.text(cx), "acbd\ne");
 4413        assert_eq!(editor.selections.ranges(cx), [5..5]);
 4414
 4415        editor.transpose(&Default::default(), window, cx);
 4416        assert_eq!(editor.text(cx), "acbde\n");
 4417        assert_eq!(editor.selections.ranges(cx), [6..6]);
 4418
 4419        editor.transpose(&Default::default(), window, cx);
 4420        assert_eq!(editor.text(cx), "acbd\ne");
 4421        assert_eq!(editor.selections.ranges(cx), [6..6]);
 4422
 4423        editor
 4424    });
 4425
 4426    _ = cx.add_window(|window, cx| {
 4427        let mut editor = build_editor(MultiBuffer::build_simple("abc\nde", cx), window, cx);
 4428        editor.set_style(EditorStyle::default(), window, cx);
 4429        editor.change_selections(None, window, cx, |s| s.select_ranges([1..1, 2..2, 4..4]));
 4430        editor.transpose(&Default::default(), window, cx);
 4431        assert_eq!(editor.text(cx), "bacd\ne");
 4432        assert_eq!(editor.selections.ranges(cx), [2..2, 3..3, 5..5]);
 4433
 4434        editor.transpose(&Default::default(), window, cx);
 4435        assert_eq!(editor.text(cx), "bcade\n");
 4436        assert_eq!(editor.selections.ranges(cx), [3..3, 4..4, 6..6]);
 4437
 4438        editor.transpose(&Default::default(), window, cx);
 4439        assert_eq!(editor.text(cx), "bcda\ne");
 4440        assert_eq!(editor.selections.ranges(cx), [4..4, 6..6]);
 4441
 4442        editor.transpose(&Default::default(), window, cx);
 4443        assert_eq!(editor.text(cx), "bcade\n");
 4444        assert_eq!(editor.selections.ranges(cx), [4..4, 6..6]);
 4445
 4446        editor.transpose(&Default::default(), window, cx);
 4447        assert_eq!(editor.text(cx), "bcaed\n");
 4448        assert_eq!(editor.selections.ranges(cx), [5..5, 6..6]);
 4449
 4450        editor
 4451    });
 4452
 4453    _ = cx.add_window(|window, cx| {
 4454        let mut editor = build_editor(MultiBuffer::build_simple("🍐🏀✋", cx), window, cx);
 4455        editor.set_style(EditorStyle::default(), window, cx);
 4456        editor.change_selections(None, window, cx, |s| s.select_ranges([4..4]));
 4457        editor.transpose(&Default::default(), window, cx);
 4458        assert_eq!(editor.text(cx), "🏀🍐✋");
 4459        assert_eq!(editor.selections.ranges(cx), [8..8]);
 4460
 4461        editor.transpose(&Default::default(), window, cx);
 4462        assert_eq!(editor.text(cx), "🏀✋🍐");
 4463        assert_eq!(editor.selections.ranges(cx), [11..11]);
 4464
 4465        editor.transpose(&Default::default(), window, cx);
 4466        assert_eq!(editor.text(cx), "🏀🍐✋");
 4467        assert_eq!(editor.selections.ranges(cx), [11..11]);
 4468
 4469        editor
 4470    });
 4471}
 4472
 4473#[gpui::test]
 4474async fn test_rewrap(cx: &mut TestAppContext) {
 4475    init_test(cx, |settings| {
 4476        settings.languages.extend([
 4477            (
 4478                "Markdown".into(),
 4479                LanguageSettingsContent {
 4480                    allow_rewrap: Some(language_settings::RewrapBehavior::Anywhere),
 4481                    ..Default::default()
 4482                },
 4483            ),
 4484            (
 4485                "Plain Text".into(),
 4486                LanguageSettingsContent {
 4487                    allow_rewrap: Some(language_settings::RewrapBehavior::Anywhere),
 4488                    ..Default::default()
 4489                },
 4490            ),
 4491        ])
 4492    });
 4493
 4494    let mut cx = EditorTestContext::new(cx).await;
 4495
 4496    let language_with_c_comments = Arc::new(Language::new(
 4497        LanguageConfig {
 4498            line_comments: vec!["// ".into()],
 4499            ..LanguageConfig::default()
 4500        },
 4501        None,
 4502    ));
 4503    let language_with_pound_comments = Arc::new(Language::new(
 4504        LanguageConfig {
 4505            line_comments: vec!["# ".into()],
 4506            ..LanguageConfig::default()
 4507        },
 4508        None,
 4509    ));
 4510    let markdown_language = Arc::new(Language::new(
 4511        LanguageConfig {
 4512            name: "Markdown".into(),
 4513            ..LanguageConfig::default()
 4514        },
 4515        None,
 4516    ));
 4517    let language_with_doc_comments = Arc::new(Language::new(
 4518        LanguageConfig {
 4519            line_comments: vec!["// ".into(), "/// ".into()],
 4520            ..LanguageConfig::default()
 4521        },
 4522        Some(tree_sitter_rust::LANGUAGE.into()),
 4523    ));
 4524
 4525    let plaintext_language = Arc::new(Language::new(
 4526        LanguageConfig {
 4527            name: "Plain Text".into(),
 4528            ..LanguageConfig::default()
 4529        },
 4530        None,
 4531    ));
 4532
 4533    assert_rewrap(
 4534        indoc! {"
 4535            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id accumsan eros.
 4536        "},
 4537        indoc! {"
 4538            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4539            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4540            // auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam
 4541            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4542            // Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed
 4543            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4544            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4545            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4546            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4547            // porttitor id. Aliquam id accumsan eros.
 4548        "},
 4549        language_with_c_comments.clone(),
 4550        &mut cx,
 4551    );
 4552
 4553    // Test that rewrapping works inside of a selection
 4554    assert_rewrap(
 4555        indoc! {"
 4556            «// Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id accumsan eros.ˇ»
 4557        "},
 4558        indoc! {"
 4559            «// Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4560            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4561            // auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam
 4562            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4563            // Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed
 4564            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4565            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4566            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4567            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4568            // porttitor id. Aliquam id accumsan eros.ˇ»
 4569        "},
 4570        language_with_c_comments.clone(),
 4571        &mut cx,
 4572    );
 4573
 4574    // Test that cursors that expand to the same region are collapsed.
 4575    assert_rewrap(
 4576        indoc! {"
 4577            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit.
 4578            // ˇVivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque.
 4579            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4580            // ˇblandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id accumsan eros.
 4581        "},
 4582        indoc! {"
 4583            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. ˇVivamus mollis elit
 4584            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4585            // auctor, eu lacinia sapien scelerisque. ˇVivamus sit amet neque et quam
 4586            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4587            // Pellentesque odio lectus, iaculis ac volutpat et, ˇblandit quis urna. Sed
 4588            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4589            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4590            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4591            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4592            // porttitor id. Aliquam id accumsan eros.
 4593        "},
 4594        language_with_c_comments.clone(),
 4595        &mut cx,
 4596    );
 4597
 4598    // Test that non-contiguous selections are treated separately.
 4599    assert_rewrap(
 4600        indoc! {"
 4601            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit.
 4602            // ˇVivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque.
 4603            //
 4604            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4605            // ˇblandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id accumsan eros.
 4606        "},
 4607        indoc! {"
 4608            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. ˇVivamus mollis elit
 4609            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4610            // auctor, eu lacinia sapien scelerisque.
 4611            //
 4612            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas
 4613            // tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4614            // ˇblandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec
 4615            // molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque
 4616            // nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas
 4617            // porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id
 4618            // vulputate turpis porttitor id. Aliquam id accumsan eros.
 4619        "},
 4620        language_with_c_comments.clone(),
 4621        &mut cx,
 4622    );
 4623
 4624    // Test that different comment prefixes are supported.
 4625    assert_rewrap(
 4626        indoc! {"
 4627            # ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id accumsan eros.
 4628        "},
 4629        indoc! {"
 4630            # ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4631            # purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4632            # eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4633            # hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4634            # lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit
 4635            # amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet
 4636            # in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur
 4637            # adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis.
 4638            # Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id
 4639            # accumsan eros.
 4640        "},
 4641        language_with_pound_comments.clone(),
 4642        &mut cx,
 4643    );
 4644
 4645    // Test that rewrapping is ignored outside of comments in most languages.
 4646    assert_rewrap(
 4647        indoc! {"
 4648            /// Adds two numbers.
 4649            /// Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.ˇ
 4650            fn add(a: u32, b: u32) -> u32 {
 4651                a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + bˇ
 4652            }
 4653        "},
 4654        indoc! {"
 4655            /// Adds two numbers. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 4656            /// Vivamus mollis elit purus, a ornare lacus gravida vitae.ˇ
 4657            fn add(a: u32, b: u32) -> u32 {
 4658                a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + bˇ
 4659            }
 4660        "},
 4661        language_with_doc_comments.clone(),
 4662        &mut cx,
 4663    );
 4664
 4665    // Test that rewrapping works in Markdown and Plain Text languages.
 4666    assert_rewrap(
 4667        indoc! {"
 4668            # Hello
 4669
 4670            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi.
 4671        "},
 4672        indoc! {"
 4673            # Hello
 4674
 4675            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit
 4676            purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4677            eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4678            hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4679            lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet
 4680            nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in.
 4681            Integer sit amet scelerisque nisi.
 4682        "},
 4683        markdown_language,
 4684        &mut cx,
 4685    );
 4686
 4687    assert_rewrap(
 4688        indoc! {"
 4689            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque nisi.
 4690        "},
 4691        indoc! {"
 4692            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit
 4693            purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4694            eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4695            hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4696            lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet
 4697            nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in.
 4698            Integer sit amet scelerisque nisi.
 4699        "},
 4700        plaintext_language,
 4701        &mut cx,
 4702    );
 4703
 4704    // Test rewrapping unaligned comments in a selection.
 4705    assert_rewrap(
 4706        indoc! {"
 4707            fn foo() {
 4708                if true {
 4709            «        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.
 4710            // Praesent semper egestas tellus id dignissim.ˇ»
 4711                    do_something();
 4712                } else {
 4713                    //
 4714                }
 4715            }
 4716        "},
 4717        indoc! {"
 4718            fn foo() {
 4719                if true {
 4720            «        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus
 4721                    // mollis elit purus, a ornare lacus gravida vitae. Praesent semper
 4722                    // egestas tellus id dignissim.ˇ»
 4723                    do_something();
 4724                } else {
 4725                    //
 4726                }
 4727            }
 4728        "},
 4729        language_with_doc_comments.clone(),
 4730        &mut cx,
 4731    );
 4732
 4733    assert_rewrap(
 4734        indoc! {"
 4735            fn foo() {
 4736                if true {
 4737            «ˇ        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.
 4738            // Praesent semper egestas tellus id dignissim.»
 4739                    do_something();
 4740                } else {
 4741                    //
 4742                }
 4743
 4744            }
 4745        "},
 4746        indoc! {"
 4747            fn foo() {
 4748                if true {
 4749            «ˇ        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus
 4750                    // mollis elit purus, a ornare lacus gravida vitae. Praesent semper
 4751                    // egestas tellus id dignissim.»
 4752                    do_something();
 4753                } else {
 4754                    //
 4755                }
 4756
 4757            }
 4758        "},
 4759        language_with_doc_comments.clone(),
 4760        &mut cx,
 4761    );
 4762
 4763    #[track_caller]
 4764    fn assert_rewrap(
 4765        unwrapped_text: &str,
 4766        wrapped_text: &str,
 4767        language: Arc<Language>,
 4768        cx: &mut EditorTestContext,
 4769    ) {
 4770        cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 4771        cx.set_state(unwrapped_text);
 4772        cx.update_editor(|e, window, cx| e.rewrap(&Rewrap, window, cx));
 4773        cx.assert_editor_state(wrapped_text);
 4774    }
 4775}
 4776
 4777#[gpui::test]
 4778async fn test_hard_wrap(cx: &mut TestAppContext) {
 4779    init_test(cx, |_| {});
 4780    let mut cx = EditorTestContext::new(cx).await;
 4781
 4782    cx.update_buffer(|buffer, cx| buffer.set_language(Some(git_commit_lang()), cx));
 4783    cx.update_editor(|editor, _, cx| {
 4784        editor.set_hard_wrap(Some(14), cx);
 4785    });
 4786
 4787    cx.set_state(indoc!(
 4788        "
 4789        one two three ˇ
 4790        "
 4791    ));
 4792    cx.simulate_input("four");
 4793    cx.run_until_parked();
 4794
 4795    cx.assert_editor_state(indoc!(
 4796        "
 4797        one two three
 4798        fourˇ
 4799        "
 4800    ));
 4801
 4802    cx.update_editor(|editor, window, cx| {
 4803        editor.newline(&Default::default(), window, cx);
 4804    });
 4805    cx.run_until_parked();
 4806    cx.assert_editor_state(indoc!(
 4807        "
 4808        one two three
 4809        four
 4810        ˇ
 4811        "
 4812    ));
 4813
 4814    cx.simulate_input("five");
 4815    cx.run_until_parked();
 4816    cx.assert_editor_state(indoc!(
 4817        "
 4818        one two three
 4819        four
 4820        fiveˇ
 4821        "
 4822    ));
 4823
 4824    cx.update_editor(|editor, window, cx| {
 4825        editor.newline(&Default::default(), window, cx);
 4826    });
 4827    cx.run_until_parked();
 4828    cx.simulate_input("# ");
 4829    cx.run_until_parked();
 4830    cx.assert_editor_state(indoc!(
 4831        "
 4832        one two three
 4833        four
 4834        five
 4835        # ˇ
 4836        "
 4837    ));
 4838
 4839    cx.update_editor(|editor, window, cx| {
 4840        editor.newline(&Default::default(), window, cx);
 4841    });
 4842    cx.run_until_parked();
 4843    cx.assert_editor_state(indoc!(
 4844        "
 4845        one two three
 4846        four
 4847        five
 4848        #\x20
 4849 4850        "
 4851    ));
 4852
 4853    cx.simulate_input(" 6");
 4854    cx.run_until_parked();
 4855    cx.assert_editor_state(indoc!(
 4856        "
 4857        one two three
 4858        four
 4859        five
 4860        #
 4861        # 6ˇ
 4862        "
 4863    ));
 4864}
 4865
 4866#[gpui::test]
 4867async fn test_clipboard(cx: &mut TestAppContext) {
 4868    init_test(cx, |_| {});
 4869
 4870    let mut cx = EditorTestContext::new(cx).await;
 4871
 4872    cx.set_state("«one✅ ˇ»two «three ˇ»four «five ˇ»six ");
 4873    cx.update_editor(|e, window, cx| e.cut(&Cut, window, cx));
 4874    cx.assert_editor_state("ˇtwo ˇfour ˇsix ");
 4875
 4876    // Paste with three cursors. Each cursor pastes one slice of the clipboard text.
 4877    cx.set_state("two ˇfour ˇsix ˇ");
 4878    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 4879    cx.assert_editor_state("two one✅ ˇfour three ˇsix five ˇ");
 4880
 4881    // Paste again but with only two cursors. Since the number of cursors doesn't
 4882    // match the number of slices in the clipboard, the entire clipboard text
 4883    // is pasted at each cursor.
 4884    cx.set_state("ˇtwo one✅ four three six five ˇ");
 4885    cx.update_editor(|e, window, cx| {
 4886        e.handle_input("( ", window, cx);
 4887        e.paste(&Paste, window, cx);
 4888        e.handle_input(") ", window, cx);
 4889    });
 4890    cx.assert_editor_state(
 4891        &([
 4892            "( one✅ ",
 4893            "three ",
 4894            "five ) ˇtwo one✅ four three six five ( one✅ ",
 4895            "three ",
 4896            "five ) ˇ",
 4897        ]
 4898        .join("\n")),
 4899    );
 4900
 4901    // Cut with three selections, one of which is full-line.
 4902    cx.set_state(indoc! {"
 4903        1«2ˇ»3
 4904        4ˇ567
 4905        «8ˇ»9"});
 4906    cx.update_editor(|e, window, cx| e.cut(&Cut, window, cx));
 4907    cx.assert_editor_state(indoc! {"
 4908        1ˇ3
 4909        ˇ9"});
 4910
 4911    // Paste with three selections, noticing how the copied selection that was full-line
 4912    // gets inserted before the second cursor.
 4913    cx.set_state(indoc! {"
 4914        1ˇ3
 4915 4916        «oˇ»ne"});
 4917    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 4918    cx.assert_editor_state(indoc! {"
 4919        12ˇ3
 4920        4567
 4921 4922        8ˇne"});
 4923
 4924    // Copy with a single cursor only, which writes the whole line into the clipboard.
 4925    cx.set_state(indoc! {"
 4926        The quick brown
 4927        fox juˇmps over
 4928        the lazy dog"});
 4929    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 4930    assert_eq!(
 4931        cx.read_from_clipboard()
 4932            .and_then(|item| item.text().as_deref().map(str::to_string)),
 4933        Some("fox jumps over\n".to_string())
 4934    );
 4935
 4936    // Paste with three selections, noticing how the copied full-line selection is inserted
 4937    // before the empty selections but replaces the selection that is non-empty.
 4938    cx.set_state(indoc! {"
 4939        Tˇhe quick brown
 4940        «foˇ»x jumps over
 4941        tˇhe lazy dog"});
 4942    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 4943    cx.assert_editor_state(indoc! {"
 4944        fox jumps over
 4945        Tˇhe quick brown
 4946        fox jumps over
 4947        ˇx jumps over
 4948        fox jumps over
 4949        tˇhe lazy dog"});
 4950}
 4951
 4952#[gpui::test]
 4953async fn test_copy_trim(cx: &mut TestAppContext) {
 4954    init_test(cx, |_| {});
 4955
 4956    let mut cx = EditorTestContext::new(cx).await;
 4957    cx.set_state(
 4958        r#"            «for selection in selections.iter() {
 4959            let mut start = selection.start;
 4960            let mut end = selection.end;
 4961            let is_entire_line = selection.is_empty();
 4962            if is_entire_line {
 4963                start = Point::new(start.row, 0);ˇ»
 4964                end = cmp::min(max_point, Point::new(end.row + 1, 0));
 4965            }
 4966        "#,
 4967    );
 4968    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 4969    assert_eq!(
 4970        cx.read_from_clipboard()
 4971            .and_then(|item| item.text().as_deref().map(str::to_string)),
 4972        Some(
 4973            "for selection in selections.iter() {
 4974            let mut start = selection.start;
 4975            let mut end = selection.end;
 4976            let is_entire_line = selection.is_empty();
 4977            if is_entire_line {
 4978                start = Point::new(start.row, 0);"
 4979                .to_string()
 4980        ),
 4981        "Regular copying preserves all indentation selected",
 4982    );
 4983    cx.update_editor(|e, window, cx| e.copy_and_trim(&CopyAndTrim, window, cx));
 4984    assert_eq!(
 4985        cx.read_from_clipboard()
 4986            .and_then(|item| item.text().as_deref().map(str::to_string)),
 4987        Some(
 4988            "for selection in selections.iter() {
 4989let mut start = selection.start;
 4990let mut end = selection.end;
 4991let is_entire_line = selection.is_empty();
 4992if is_entire_line {
 4993    start = Point::new(start.row, 0);"
 4994                .to_string()
 4995        ),
 4996        "Copying with stripping should strip all leading whitespaces"
 4997    );
 4998
 4999    cx.set_state(
 5000        r#"       «     for selection in selections.iter() {
 5001            let mut start = selection.start;
 5002            let mut end = selection.end;
 5003            let is_entire_line = selection.is_empty();
 5004            if is_entire_line {
 5005                start = Point::new(start.row, 0);ˇ»
 5006                end = cmp::min(max_point, Point::new(end.row + 1, 0));
 5007            }
 5008        "#,
 5009    );
 5010    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 5011    assert_eq!(
 5012        cx.read_from_clipboard()
 5013            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5014        Some(
 5015            "     for selection in selections.iter() {
 5016            let mut start = selection.start;
 5017            let mut end = selection.end;
 5018            let is_entire_line = selection.is_empty();
 5019            if is_entire_line {
 5020                start = Point::new(start.row, 0);"
 5021                .to_string()
 5022        ),
 5023        "Regular copying preserves all indentation selected",
 5024    );
 5025    cx.update_editor(|e, window, cx| e.copy_and_trim(&CopyAndTrim, window, cx));
 5026    assert_eq!(
 5027        cx.read_from_clipboard()
 5028            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5029        Some(
 5030            "for selection in selections.iter() {
 5031let mut start = selection.start;
 5032let mut end = selection.end;
 5033let is_entire_line = selection.is_empty();
 5034if is_entire_line {
 5035    start = Point::new(start.row, 0);"
 5036                .to_string()
 5037        ),
 5038        "Copying with stripping should strip all leading whitespaces, even if some of it was selected"
 5039    );
 5040
 5041    cx.set_state(
 5042        r#"       «ˇ     for selection in selections.iter() {
 5043            let mut start = selection.start;
 5044            let mut end = selection.end;
 5045            let is_entire_line = selection.is_empty();
 5046            if is_entire_line {
 5047                start = Point::new(start.row, 0);»
 5048                end = cmp::min(max_point, Point::new(end.row + 1, 0));
 5049            }
 5050        "#,
 5051    );
 5052    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 5053    assert_eq!(
 5054        cx.read_from_clipboard()
 5055            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5056        Some(
 5057            "     for selection in selections.iter() {
 5058            let mut start = selection.start;
 5059            let mut end = selection.end;
 5060            let is_entire_line = selection.is_empty();
 5061            if is_entire_line {
 5062                start = Point::new(start.row, 0);"
 5063                .to_string()
 5064        ),
 5065        "Regular copying for reverse selection works the same",
 5066    );
 5067    cx.update_editor(|e, window, cx| e.copy_and_trim(&CopyAndTrim, window, cx));
 5068    assert_eq!(
 5069        cx.read_from_clipboard()
 5070            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5071        Some(
 5072            "for selection in selections.iter() {
 5073let mut start = selection.start;
 5074let mut end = selection.end;
 5075let is_entire_line = selection.is_empty();
 5076if is_entire_line {
 5077    start = Point::new(start.row, 0);"
 5078                .to_string()
 5079        ),
 5080        "Copying with stripping for reverse selection works the same"
 5081    );
 5082
 5083    cx.set_state(
 5084        r#"            for selection «in selections.iter() {
 5085            let mut start = selection.start;
 5086            let mut end = selection.end;
 5087            let is_entire_line = selection.is_empty();
 5088            if is_entire_line {
 5089                start = Point::new(start.row, 0);ˇ»
 5090                end = cmp::min(max_point, Point::new(end.row + 1, 0));
 5091            }
 5092        "#,
 5093    );
 5094    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 5095    assert_eq!(
 5096        cx.read_from_clipboard()
 5097            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5098        Some(
 5099            "in selections.iter() {
 5100            let mut start = selection.start;
 5101            let mut end = selection.end;
 5102            let is_entire_line = selection.is_empty();
 5103            if is_entire_line {
 5104                start = Point::new(start.row, 0);"
 5105                .to_string()
 5106        ),
 5107        "When selecting past the indent, the copying works as usual",
 5108    );
 5109    cx.update_editor(|e, window, cx| e.copy_and_trim(&CopyAndTrim, window, cx));
 5110    assert_eq!(
 5111        cx.read_from_clipboard()
 5112            .and_then(|item| item.text().as_deref().map(str::to_string)),
 5113        Some(
 5114            "in selections.iter() {
 5115            let mut start = selection.start;
 5116            let mut end = selection.end;
 5117            let is_entire_line = selection.is_empty();
 5118            if is_entire_line {
 5119                start = Point::new(start.row, 0);"
 5120                .to_string()
 5121        ),
 5122        "When selecting past the indent, nothing is trimmed"
 5123    );
 5124}
 5125
 5126#[gpui::test]
 5127async fn test_paste_multiline(cx: &mut TestAppContext) {
 5128    init_test(cx, |_| {});
 5129
 5130    let mut cx = EditorTestContext::new(cx).await;
 5131    cx.update_buffer(|buffer, cx| buffer.set_language(Some(rust_lang()), cx));
 5132
 5133    // Cut an indented block, without the leading whitespace.
 5134    cx.set_state(indoc! {"
 5135        const a: B = (
 5136            c(),
 5137            «d(
 5138                e,
 5139                f
 5140            )ˇ»
 5141        );
 5142    "});
 5143    cx.update_editor(|e, window, cx| e.cut(&Cut, window, cx));
 5144    cx.assert_editor_state(indoc! {"
 5145        const a: B = (
 5146            c(),
 5147            ˇ
 5148        );
 5149    "});
 5150
 5151    // Paste it at the same position.
 5152    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5153    cx.assert_editor_state(indoc! {"
 5154        const a: B = (
 5155            c(),
 5156            d(
 5157                e,
 5158                f
 5159 5160        );
 5161    "});
 5162
 5163    // Paste it at a line with a lower indent level.
 5164    cx.set_state(indoc! {"
 5165        ˇ
 5166        const a: B = (
 5167            c(),
 5168        );
 5169    "});
 5170    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5171    cx.assert_editor_state(indoc! {"
 5172        d(
 5173            e,
 5174            f
 5175 5176        const a: B = (
 5177            c(),
 5178        );
 5179    "});
 5180
 5181    // Cut an indented block, with the leading whitespace.
 5182    cx.set_state(indoc! {"
 5183        const a: B = (
 5184            c(),
 5185        «    d(
 5186                e,
 5187                f
 5188            )
 5189        ˇ»);
 5190    "});
 5191    cx.update_editor(|e, window, cx| e.cut(&Cut, window, cx));
 5192    cx.assert_editor_state(indoc! {"
 5193        const a: B = (
 5194            c(),
 5195        ˇ);
 5196    "});
 5197
 5198    // Paste it at the same position.
 5199    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5200    cx.assert_editor_state(indoc! {"
 5201        const a: B = (
 5202            c(),
 5203            d(
 5204                e,
 5205                f
 5206            )
 5207        ˇ);
 5208    "});
 5209
 5210    // Paste it at a line with a higher indent level.
 5211    cx.set_state(indoc! {"
 5212        const a: B = (
 5213            c(),
 5214            d(
 5215                e,
 5216 5217            )
 5218        );
 5219    "});
 5220    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5221    cx.assert_editor_state(indoc! {"
 5222        const a: B = (
 5223            c(),
 5224            d(
 5225                e,
 5226                f    d(
 5227                    e,
 5228                    f
 5229                )
 5230        ˇ
 5231            )
 5232        );
 5233    "});
 5234
 5235    // Copy an indented block, starting mid-line
 5236    cx.set_state(indoc! {"
 5237        const a: B = (
 5238            c(),
 5239            somethin«g(
 5240                e,
 5241                f
 5242            )ˇ»
 5243        );
 5244    "});
 5245    cx.update_editor(|e, window, cx| e.copy(&Copy, window, cx));
 5246
 5247    // Paste it on a line with a lower indent level
 5248    cx.update_editor(|e, window, cx| e.move_to_end(&Default::default(), window, cx));
 5249    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5250    cx.assert_editor_state(indoc! {"
 5251        const a: B = (
 5252            c(),
 5253            something(
 5254                e,
 5255                f
 5256            )
 5257        );
 5258        g(
 5259            e,
 5260            f
 5261"});
 5262}
 5263
 5264#[gpui::test]
 5265async fn test_paste_content_from_other_app(cx: &mut TestAppContext) {
 5266    init_test(cx, |_| {});
 5267
 5268    cx.write_to_clipboard(ClipboardItem::new_string(
 5269        "    d(\n        e\n    );\n".into(),
 5270    ));
 5271
 5272    let mut cx = EditorTestContext::new(cx).await;
 5273    cx.update_buffer(|buffer, cx| buffer.set_language(Some(rust_lang()), cx));
 5274
 5275    cx.set_state(indoc! {"
 5276        fn a() {
 5277            b();
 5278            if c() {
 5279                ˇ
 5280            }
 5281        }
 5282    "});
 5283
 5284    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5285    cx.assert_editor_state(indoc! {"
 5286        fn a() {
 5287            b();
 5288            if c() {
 5289                d(
 5290                    e
 5291                );
 5292        ˇ
 5293            }
 5294        }
 5295    "});
 5296
 5297    cx.set_state(indoc! {"
 5298        fn a() {
 5299            b();
 5300            ˇ
 5301        }
 5302    "});
 5303
 5304    cx.update_editor(|e, window, cx| e.paste(&Paste, window, cx));
 5305    cx.assert_editor_state(indoc! {"
 5306        fn a() {
 5307            b();
 5308            d(
 5309                e
 5310            );
 5311        ˇ
 5312        }
 5313    "});
 5314}
 5315
 5316#[gpui::test]
 5317fn test_select_all(cx: &mut TestAppContext) {
 5318    init_test(cx, |_| {});
 5319
 5320    let editor = cx.add_window(|window, cx| {
 5321        let buffer = MultiBuffer::build_simple("abc\nde\nfgh", cx);
 5322        build_editor(buffer, window, cx)
 5323    });
 5324    _ = editor.update(cx, |editor, window, cx| {
 5325        editor.select_all(&SelectAll, window, cx);
 5326        assert_eq!(
 5327            editor.selections.display_ranges(cx),
 5328            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(2), 3)]
 5329        );
 5330    });
 5331}
 5332
 5333#[gpui::test]
 5334fn test_select_line(cx: &mut TestAppContext) {
 5335    init_test(cx, |_| {});
 5336
 5337    let editor = cx.add_window(|window, cx| {
 5338        let buffer = MultiBuffer::build_simple(&sample_text(6, 5, 'a'), cx);
 5339        build_editor(buffer, window, cx)
 5340    });
 5341    _ = editor.update(cx, |editor, window, cx| {
 5342        editor.change_selections(None, window, cx, |s| {
 5343            s.select_display_ranges([
 5344                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 5345                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 5346                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 5347                DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(4), 2),
 5348            ])
 5349        });
 5350        editor.select_line(&SelectLine, window, cx);
 5351        assert_eq!(
 5352            editor.selections.display_ranges(cx),
 5353            vec![
 5354                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(2), 0),
 5355                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(5), 0),
 5356            ]
 5357        );
 5358    });
 5359
 5360    _ = editor.update(cx, |editor, window, cx| {
 5361        editor.select_line(&SelectLine, window, cx);
 5362        assert_eq!(
 5363            editor.selections.display_ranges(cx),
 5364            vec![
 5365                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(3), 0),
 5366                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(5), 5),
 5367            ]
 5368        );
 5369    });
 5370
 5371    _ = editor.update(cx, |editor, window, cx| {
 5372        editor.select_line(&SelectLine, window, cx);
 5373        assert_eq!(
 5374            editor.selections.display_ranges(cx),
 5375            vec![DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(5), 5)]
 5376        );
 5377    });
 5378}
 5379
 5380#[gpui::test]
 5381async fn test_split_selection_into_lines(cx: &mut TestAppContext) {
 5382    init_test(cx, |_| {});
 5383    let mut cx = EditorTestContext::new(cx).await;
 5384
 5385    #[track_caller]
 5386    fn test(cx: &mut EditorTestContext, initial_state: &'static str, expected_state: &'static str) {
 5387        cx.set_state(initial_state);
 5388        cx.update_editor(|e, window, cx| {
 5389            e.split_selection_into_lines(&SplitSelectionIntoLines, window, cx)
 5390        });
 5391        cx.assert_editor_state(expected_state);
 5392    }
 5393
 5394    // Selection starts and ends at the middle of lines, left-to-right
 5395    test(
 5396        &mut cx,
 5397        "aa\nb«ˇb\ncc\ndd\ne»e\nff",
 5398        "aa\nbbˇ\nccˇ\nddˇ\neˇe\nff",
 5399    );
 5400    // Same thing, right-to-left
 5401    test(
 5402        &mut cx,
 5403        "aa\nb«b\ncc\ndd\neˇ»e\nff",
 5404        "aa\nbbˇ\nccˇ\nddˇ\neˇe\nff",
 5405    );
 5406
 5407    // Whole buffer, left-to-right, last line *doesn't* end with newline
 5408    test(
 5409        &mut cx,
 5410        "«ˇaa\nbb\ncc\ndd\nee\nff»",
 5411        "aaˇ\nbbˇ\nccˇ\nddˇ\neeˇ\nffˇ",
 5412    );
 5413    // Same thing, right-to-left
 5414    test(
 5415        &mut cx,
 5416        "«aa\nbb\ncc\ndd\nee\nffˇ»",
 5417        "aaˇ\nbbˇ\nccˇ\nddˇ\neeˇ\nffˇ",
 5418    );
 5419
 5420    // Whole buffer, left-to-right, last line ends with newline
 5421    test(
 5422        &mut cx,
 5423        "«ˇaa\nbb\ncc\ndd\nee\nff\n»",
 5424        "aaˇ\nbbˇ\nccˇ\nddˇ\neeˇ\nffˇ\n",
 5425    );
 5426    // Same thing, right-to-left
 5427    test(
 5428        &mut cx,
 5429        "«aa\nbb\ncc\ndd\nee\nff\nˇ»",
 5430        "aaˇ\nbbˇ\nccˇ\nddˇ\neeˇ\nffˇ\n",
 5431    );
 5432
 5433    // Starts at the end of a line, ends at the start of another
 5434    test(
 5435        &mut cx,
 5436        "aa\nbb«ˇ\ncc\ndd\nee\n»ff\n",
 5437        "aa\nbbˇ\nccˇ\nddˇ\neeˇ\nff\n",
 5438    );
 5439}
 5440
 5441#[gpui::test]
 5442async fn test_split_selection_into_lines_interacting_with_creases(cx: &mut TestAppContext) {
 5443    init_test(cx, |_| {});
 5444
 5445    let editor = cx.add_window(|window, cx| {
 5446        let buffer = MultiBuffer::build_simple(&sample_text(9, 5, 'a'), cx);
 5447        build_editor(buffer, window, cx)
 5448    });
 5449
 5450    // setup
 5451    _ = editor.update(cx, |editor, window, cx| {
 5452        editor.fold_creases(
 5453            vec![
 5454                Crease::simple(Point::new(0, 2)..Point::new(1, 2), FoldPlaceholder::test()),
 5455                Crease::simple(Point::new(2, 3)..Point::new(4, 1), FoldPlaceholder::test()),
 5456                Crease::simple(Point::new(7, 0)..Point::new(8, 4), FoldPlaceholder::test()),
 5457            ],
 5458            true,
 5459            window,
 5460            cx,
 5461        );
 5462        assert_eq!(
 5463            editor.display_text(cx),
 5464            "aa⋯bbb\nccc⋯eeee\nfffff\nggggg\n⋯i"
 5465        );
 5466    });
 5467
 5468    _ = editor.update(cx, |editor, window, cx| {
 5469        editor.change_selections(None, window, cx, |s| {
 5470            s.select_display_ranges([
 5471                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 5472                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 5473                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 5474                DisplayPoint::new(DisplayRow(4), 4)..DisplayPoint::new(DisplayRow(4), 4),
 5475            ])
 5476        });
 5477        editor.split_selection_into_lines(&SplitSelectionIntoLines, window, cx);
 5478        assert_eq!(
 5479            editor.display_text(cx),
 5480            "aaaaa\nbbbbb\nccc⋯eeee\nfffff\nggggg\n⋯i"
 5481        );
 5482    });
 5483    EditorTestContext::for_editor(editor, cx)
 5484        .await
 5485        .assert_editor_state("aˇaˇaaa\nbbbbb\nˇccccc\nddddd\neeeee\nfffff\nggggg\nhhhhh\niiiiiˇ");
 5486
 5487    _ = editor.update(cx, |editor, window, cx| {
 5488        editor.change_selections(None, window, cx, |s| {
 5489            s.select_display_ranges([
 5490                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 1)
 5491            ])
 5492        });
 5493        editor.split_selection_into_lines(&SplitSelectionIntoLines, window, cx);
 5494        assert_eq!(
 5495            editor.display_text(cx),
 5496            "aaaaa\nbbbbb\nccccc\nddddd\neeeee\nfffff\nggggg\nhhhhh\niiiii"
 5497        );
 5498        assert_eq!(
 5499            editor.selections.display_ranges(cx),
 5500            [
 5501                DisplayPoint::new(DisplayRow(0), 5)..DisplayPoint::new(DisplayRow(0), 5),
 5502                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 5503                DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),
 5504                DisplayPoint::new(DisplayRow(3), 5)..DisplayPoint::new(DisplayRow(3), 5),
 5505                DisplayPoint::new(DisplayRow(4), 5)..DisplayPoint::new(DisplayRow(4), 5),
 5506                DisplayPoint::new(DisplayRow(5), 5)..DisplayPoint::new(DisplayRow(5), 5),
 5507                DisplayPoint::new(DisplayRow(6), 5)..DisplayPoint::new(DisplayRow(6), 5)
 5508            ]
 5509        );
 5510    });
 5511    EditorTestContext::for_editor(editor, cx)
 5512        .await
 5513        .assert_editor_state(
 5514            "aaaaaˇ\nbbbbbˇ\ncccccˇ\ndddddˇ\neeeeeˇ\nfffffˇ\ngggggˇ\nhhhhh\niiiii",
 5515        );
 5516}
 5517
 5518#[gpui::test]
 5519async fn test_add_selection_above_below(cx: &mut TestAppContext) {
 5520    init_test(cx, |_| {});
 5521
 5522    let mut cx = EditorTestContext::new(cx).await;
 5523
 5524    cx.set_state(indoc!(
 5525        r#"abc
 5526           defˇghi
 5527
 5528           jk
 5529           nlmo
 5530           "#
 5531    ));
 5532
 5533    cx.update_editor(|editor, window, cx| {
 5534        editor.add_selection_above(&Default::default(), window, cx);
 5535    });
 5536
 5537    cx.assert_editor_state(indoc!(
 5538        r#"abcˇ
 5539           defˇghi
 5540
 5541           jk
 5542           nlmo
 5543           "#
 5544    ));
 5545
 5546    cx.update_editor(|editor, window, cx| {
 5547        editor.add_selection_above(&Default::default(), window, cx);
 5548    });
 5549
 5550    cx.assert_editor_state(indoc!(
 5551        r#"abcˇ
 5552            defˇghi
 5553
 5554            jk
 5555            nlmo
 5556            "#
 5557    ));
 5558
 5559    cx.update_editor(|editor, window, cx| {
 5560        editor.add_selection_below(&Default::default(), window, cx);
 5561    });
 5562
 5563    cx.assert_editor_state(indoc!(
 5564        r#"abc
 5565           defˇghi
 5566
 5567           jk
 5568           nlmo
 5569           "#
 5570    ));
 5571
 5572    cx.update_editor(|editor, window, cx| {
 5573        editor.undo_selection(&Default::default(), window, cx);
 5574    });
 5575
 5576    cx.assert_editor_state(indoc!(
 5577        r#"abcˇ
 5578           defˇghi
 5579
 5580           jk
 5581           nlmo
 5582           "#
 5583    ));
 5584
 5585    cx.update_editor(|editor, window, cx| {
 5586        editor.redo_selection(&Default::default(), window, cx);
 5587    });
 5588
 5589    cx.assert_editor_state(indoc!(
 5590        r#"abc
 5591           defˇghi
 5592
 5593           jk
 5594           nlmo
 5595           "#
 5596    ));
 5597
 5598    cx.update_editor(|editor, window, cx| {
 5599        editor.add_selection_below(&Default::default(), window, cx);
 5600    });
 5601
 5602    cx.assert_editor_state(indoc!(
 5603        r#"abc
 5604           defˇghi
 5605
 5606           jk
 5607           nlmˇo
 5608           "#
 5609    ));
 5610
 5611    cx.update_editor(|editor, window, cx| {
 5612        editor.add_selection_below(&Default::default(), window, cx);
 5613    });
 5614
 5615    cx.assert_editor_state(indoc!(
 5616        r#"abc
 5617           defˇghi
 5618
 5619           jk
 5620           nlmˇo
 5621           "#
 5622    ));
 5623
 5624    // change selections
 5625    cx.set_state(indoc!(
 5626        r#"abc
 5627           def«ˇg»hi
 5628
 5629           jk
 5630           nlmo
 5631           "#
 5632    ));
 5633
 5634    cx.update_editor(|editor, window, cx| {
 5635        editor.add_selection_below(&Default::default(), window, cx);
 5636    });
 5637
 5638    cx.assert_editor_state(indoc!(
 5639        r#"abc
 5640           def«ˇg»hi
 5641
 5642           jk
 5643           nlm«ˇo»
 5644           "#
 5645    ));
 5646
 5647    cx.update_editor(|editor, window, cx| {
 5648        editor.add_selection_below(&Default::default(), window, cx);
 5649    });
 5650
 5651    cx.assert_editor_state(indoc!(
 5652        r#"abc
 5653           def«ˇg»hi
 5654
 5655           jk
 5656           nlm«ˇo»
 5657           "#
 5658    ));
 5659
 5660    cx.update_editor(|editor, window, cx| {
 5661        editor.add_selection_above(&Default::default(), window, cx);
 5662    });
 5663
 5664    cx.assert_editor_state(indoc!(
 5665        r#"abc
 5666           def«ˇg»hi
 5667
 5668           jk
 5669           nlmo
 5670           "#
 5671    ));
 5672
 5673    cx.update_editor(|editor, window, cx| {
 5674        editor.add_selection_above(&Default::default(), window, cx);
 5675    });
 5676
 5677    cx.assert_editor_state(indoc!(
 5678        r#"abc
 5679           def«ˇg»hi
 5680
 5681           jk
 5682           nlmo
 5683           "#
 5684    ));
 5685
 5686    // Change selections again
 5687    cx.set_state(indoc!(
 5688        r#"a«bc
 5689           defgˇ»hi
 5690
 5691           jk
 5692           nlmo
 5693           "#
 5694    ));
 5695
 5696    cx.update_editor(|editor, window, cx| {
 5697        editor.add_selection_below(&Default::default(), window, cx);
 5698    });
 5699
 5700    cx.assert_editor_state(indoc!(
 5701        r#"a«bcˇ»
 5702           d«efgˇ»hi
 5703
 5704           j«kˇ»
 5705           nlmo
 5706           "#
 5707    ));
 5708
 5709    cx.update_editor(|editor, window, cx| {
 5710        editor.add_selection_below(&Default::default(), window, cx);
 5711    });
 5712    cx.assert_editor_state(indoc!(
 5713        r#"a«bcˇ»
 5714           d«efgˇ»hi
 5715
 5716           j«kˇ»
 5717           n«lmoˇ»
 5718           "#
 5719    ));
 5720    cx.update_editor(|editor, window, cx| {
 5721        editor.add_selection_above(&Default::default(), window, cx);
 5722    });
 5723
 5724    cx.assert_editor_state(indoc!(
 5725        r#"a«bcˇ»
 5726           d«efgˇ»hi
 5727
 5728           j«kˇ»
 5729           nlmo
 5730           "#
 5731    ));
 5732
 5733    // Change selections again
 5734    cx.set_state(indoc!(
 5735        r#"abc
 5736           d«ˇefghi
 5737
 5738           jk
 5739           nlm»o
 5740           "#
 5741    ));
 5742
 5743    cx.update_editor(|editor, window, cx| {
 5744        editor.add_selection_above(&Default::default(), window, cx);
 5745    });
 5746
 5747    cx.assert_editor_state(indoc!(
 5748        r#"a«ˇbc»
 5749           d«ˇef»ghi
 5750
 5751           j«ˇk»
 5752           n«ˇlm»o
 5753           "#
 5754    ));
 5755
 5756    cx.update_editor(|editor, window, cx| {
 5757        editor.add_selection_below(&Default::default(), window, cx);
 5758    });
 5759
 5760    cx.assert_editor_state(indoc!(
 5761        r#"abc
 5762           d«ˇef»ghi
 5763
 5764           j«ˇk»
 5765           n«ˇlm»o
 5766           "#
 5767    ));
 5768}
 5769
 5770#[gpui::test]
 5771async fn test_select_next(cx: &mut TestAppContext) {
 5772    init_test(cx, |_| {});
 5773
 5774    let mut cx = EditorTestContext::new(cx).await;
 5775    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 5776
 5777    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5778        .unwrap();
 5779    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5780
 5781    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5782        .unwrap();
 5783    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\nabc");
 5784
 5785    cx.update_editor(|editor, window, cx| editor.undo_selection(&UndoSelection, window, cx));
 5786    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5787
 5788    cx.update_editor(|editor, window, cx| editor.redo_selection(&RedoSelection, window, cx));
 5789    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\nabc");
 5790
 5791    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5792        .unwrap();
 5793    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5794
 5795    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5796        .unwrap();
 5797    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5798}
 5799
 5800#[gpui::test]
 5801async fn test_select_all_matches(cx: &mut TestAppContext) {
 5802    init_test(cx, |_| {});
 5803
 5804    let mut cx = EditorTestContext::new(cx).await;
 5805
 5806    // Test caret-only selections
 5807    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 5808    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5809        .unwrap();
 5810    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5811
 5812    // Test left-to-right selections
 5813    cx.set_state("abc\n«abcˇ»\nabc");
 5814    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5815        .unwrap();
 5816    cx.assert_editor_state("«abcˇ»\n«abcˇ»\n«abcˇ»");
 5817
 5818    // Test right-to-left selections
 5819    cx.set_state("abc\n«ˇabc»\nabc");
 5820    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5821        .unwrap();
 5822    cx.assert_editor_state("«ˇabc»\n«ˇabc»\n«ˇabc»");
 5823
 5824    // Test selecting whitespace with caret selection
 5825    cx.set_state("abc\nˇ   abc\nabc");
 5826    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5827        .unwrap();
 5828    cx.assert_editor_state("abc\n«   ˇ»abc\nabc");
 5829
 5830    // Test selecting whitespace with left-to-right selection
 5831    cx.set_state("abc\n«ˇ  »abc\nabc");
 5832    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5833        .unwrap();
 5834    cx.assert_editor_state("abc\n«ˇ  »abc\nabc");
 5835
 5836    // Test no matches with right-to-left selection
 5837    cx.set_state("abc\n«  ˇ»abc\nabc");
 5838    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5839        .unwrap();
 5840    cx.assert_editor_state("abc\n«  ˇ»abc\nabc");
 5841}
 5842
 5843#[gpui::test]
 5844async fn test_select_all_matches_does_not_scroll(cx: &mut TestAppContext) {
 5845    init_test(cx, |_| {});
 5846
 5847    let mut cx = EditorTestContext::new(cx).await;
 5848
 5849    let large_body_1 = "\nd".repeat(200);
 5850    let large_body_2 = "\ne".repeat(200);
 5851
 5852    cx.set_state(&format!(
 5853        "abc\nabc{large_body_1} «ˇa»bc{large_body_2}\nefabc\nabc"
 5854    ));
 5855    let initial_scroll_position = cx.update_editor(|editor, _, cx| {
 5856        let scroll_position = editor.scroll_position(cx);
 5857        assert!(scroll_position.y > 0.0, "Initial selection is between two large bodies and should have the editor scrolled to it");
 5858        scroll_position
 5859    });
 5860
 5861    cx.update_editor(|e, window, cx| e.select_all_matches(&SelectAllMatches, window, cx))
 5862        .unwrap();
 5863    cx.assert_editor_state(&format!(
 5864        "«ˇa»bc\n«ˇa»bc{large_body_1} «ˇa»bc{large_body_2}\nef«ˇa»bc\n«ˇa»bc"
 5865    ));
 5866    let scroll_position_after_selection =
 5867        cx.update_editor(|editor, _, cx| editor.scroll_position(cx));
 5868    assert_eq!(
 5869        initial_scroll_position, scroll_position_after_selection,
 5870        "Scroll position should not change after selecting all matches"
 5871    );
 5872}
 5873
 5874#[gpui::test]
 5875async fn test_undo_format_scrolls_to_last_edit_pos(cx: &mut TestAppContext) {
 5876    init_test(cx, |_| {});
 5877
 5878    let mut cx = EditorLspTestContext::new_rust(
 5879        lsp::ServerCapabilities {
 5880            document_formatting_provider: Some(lsp::OneOf::Left(true)),
 5881            ..Default::default()
 5882        },
 5883        cx,
 5884    )
 5885    .await;
 5886
 5887    cx.set_state(indoc! {"
 5888        line 1
 5889        line 2
 5890        linˇe 3
 5891        line 4
 5892        line 5
 5893    "});
 5894
 5895    // Make an edit
 5896    cx.update_editor(|editor, window, cx| {
 5897        editor.handle_input("X", window, cx);
 5898    });
 5899
 5900    // Move cursor to a different position
 5901    cx.update_editor(|editor, window, cx| {
 5902        editor.change_selections(None, window, cx, |s| {
 5903            s.select_ranges([Point::new(4, 2)..Point::new(4, 2)]);
 5904        });
 5905    });
 5906
 5907    cx.assert_editor_state(indoc! {"
 5908        line 1
 5909        line 2
 5910        linXe 3
 5911        line 4
 5912        liˇne 5
 5913    "});
 5914
 5915    cx.lsp
 5916        .set_request_handler::<lsp::request::Formatting, _, _>(move |_, _| async move {
 5917            Ok(Some(vec![lsp::TextEdit::new(
 5918                lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
 5919                "PREFIX ".to_string(),
 5920            )]))
 5921        });
 5922
 5923    cx.update_editor(|editor, window, cx| editor.format(&Default::default(), window, cx))
 5924        .unwrap()
 5925        .await
 5926        .unwrap();
 5927
 5928    cx.assert_editor_state(indoc! {"
 5929        PREFIX line 1
 5930        line 2
 5931        linXe 3
 5932        line 4
 5933        liˇne 5
 5934    "});
 5935
 5936    // Undo formatting
 5937    cx.update_editor(|editor, window, cx| {
 5938        editor.undo(&Default::default(), window, cx);
 5939    });
 5940
 5941    // Verify cursor moved back to position after edit
 5942    cx.assert_editor_state(indoc! {"
 5943        line 1
 5944        line 2
 5945        linXˇe 3
 5946        line 4
 5947        line 5
 5948    "});
 5949}
 5950
 5951#[gpui::test]
 5952async fn test_select_next_with_multiple_carets(cx: &mut TestAppContext) {
 5953    init_test(cx, |_| {});
 5954
 5955    let mut cx = EditorTestContext::new(cx).await;
 5956    cx.set_state(
 5957        r#"let foo = 2;
 5958lˇet foo = 2;
 5959let fooˇ = 2;
 5960let foo = 2;
 5961let foo = ˇ2;"#,
 5962    );
 5963
 5964    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5965        .unwrap();
 5966    cx.assert_editor_state(
 5967        r#"let foo = 2;
 5968«letˇ» foo = 2;
 5969let «fooˇ» = 2;
 5970let foo = 2;
 5971let foo = «2ˇ»;"#,
 5972    );
 5973
 5974    // noop for multiple selections with different contents
 5975    cx.update_editor(|e, window, cx| e.select_next(&SelectNext::default(), window, cx))
 5976        .unwrap();
 5977    cx.assert_editor_state(
 5978        r#"let foo = 2;
 5979«letˇ» foo = 2;
 5980let «fooˇ» = 2;
 5981let foo = 2;
 5982let foo = «2ˇ»;"#,
 5983    );
 5984}
 5985
 5986#[gpui::test]
 5987async fn test_select_previous_multibuffer(cx: &mut TestAppContext) {
 5988    init_test(cx, |_| {});
 5989
 5990    let mut cx =
 5991        EditorTestContext::new_multibuffer(cx, ["aaa\n«bbb\nccc\n»ddd", "aaa\n«bbb\nccc\n»ddd"]);
 5992
 5993    cx.assert_editor_state(indoc! {"
 5994        ˇbbb
 5995        ccc
 5996
 5997        bbb
 5998        ccc
 5999        "});
 6000    cx.dispatch_action(SelectPrevious::default());
 6001    cx.assert_editor_state(indoc! {"
 6002                «bbbˇ»
 6003                ccc
 6004
 6005                bbb
 6006                ccc
 6007                "});
 6008    cx.dispatch_action(SelectPrevious::default());
 6009    cx.assert_editor_state(indoc! {"
 6010                «bbbˇ»
 6011                ccc
 6012
 6013                «bbbˇ»
 6014                ccc
 6015                "});
 6016}
 6017
 6018#[gpui::test]
 6019async fn test_select_previous_with_single_caret(cx: &mut TestAppContext) {
 6020    init_test(cx, |_| {});
 6021
 6022    let mut cx = EditorTestContext::new(cx).await;
 6023    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 6024
 6025    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6026        .unwrap();
 6027    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 6028
 6029    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6030        .unwrap();
 6031    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\nabc");
 6032
 6033    cx.update_editor(|editor, window, cx| editor.undo_selection(&UndoSelection, window, cx));
 6034    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 6035
 6036    cx.update_editor(|editor, window, cx| editor.redo_selection(&RedoSelection, window, cx));
 6037    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\nabc");
 6038
 6039    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6040        .unwrap();
 6041    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\n«abcˇ»");
 6042
 6043    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6044        .unwrap();
 6045    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndef«abcˇ»\n«abcˇ»");
 6046
 6047    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6048        .unwrap();
 6049    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndef«abcˇ»\n«abcˇ»");
 6050}
 6051
 6052#[gpui::test]
 6053async fn test_select_previous_empty_buffer(cx: &mut TestAppContext) {
 6054    init_test(cx, |_| {});
 6055
 6056    let mut cx = EditorTestContext::new(cx).await;
 6057    cx.set_state("");
 6058
 6059    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6060        .unwrap();
 6061    cx.assert_editor_state("«aˇ»");
 6062    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6063        .unwrap();
 6064    cx.assert_editor_state("«aˇ»");
 6065}
 6066
 6067#[gpui::test]
 6068async fn test_select_previous_with_multiple_carets(cx: &mut TestAppContext) {
 6069    init_test(cx, |_| {});
 6070
 6071    let mut cx = EditorTestContext::new(cx).await;
 6072    cx.set_state(
 6073        r#"let foo = 2;
 6074lˇet foo = 2;
 6075let fooˇ = 2;
 6076let foo = 2;
 6077let foo = ˇ2;"#,
 6078    );
 6079
 6080    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6081        .unwrap();
 6082    cx.assert_editor_state(
 6083        r#"let foo = 2;
 6084«letˇ» foo = 2;
 6085let «fooˇ» = 2;
 6086let foo = 2;
 6087let foo = «2ˇ»;"#,
 6088    );
 6089
 6090    // noop for multiple selections with different contents
 6091    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6092        .unwrap();
 6093    cx.assert_editor_state(
 6094        r#"let foo = 2;
 6095«letˇ» foo = 2;
 6096let «fooˇ» = 2;
 6097let foo = 2;
 6098let foo = «2ˇ»;"#,
 6099    );
 6100}
 6101
 6102#[gpui::test]
 6103async fn test_select_previous_with_single_selection(cx: &mut TestAppContext) {
 6104    init_test(cx, |_| {});
 6105
 6106    let mut cx = EditorTestContext::new(cx).await;
 6107    cx.set_state("abc\n«ˇabc» abc\ndefabc\nabc");
 6108
 6109    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6110        .unwrap();
 6111    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\nabc");
 6112
 6113    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6114        .unwrap();
 6115    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\n«abcˇ»");
 6116
 6117    cx.update_editor(|editor, window, cx| editor.undo_selection(&UndoSelection, window, cx));
 6118    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\nabc");
 6119
 6120    cx.update_editor(|editor, window, cx| editor.redo_selection(&RedoSelection, window, cx));
 6121    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\n«abcˇ»");
 6122
 6123    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6124        .unwrap();
 6125    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndef«abcˇ»\n«abcˇ»");
 6126
 6127    cx.update_editor(|e, window, cx| e.select_previous(&SelectPrevious::default(), window, cx))
 6128        .unwrap();
 6129    cx.assert_editor_state("«abcˇ»\n«ˇabc» «abcˇ»\ndef«abcˇ»\n«abcˇ»");
 6130}
 6131
 6132#[gpui::test]
 6133async fn test_select_larger_smaller_syntax_node(cx: &mut TestAppContext) {
 6134    init_test(cx, |_| {});
 6135
 6136    let language = Arc::new(Language::new(
 6137        LanguageConfig::default(),
 6138        Some(tree_sitter_rust::LANGUAGE.into()),
 6139    ));
 6140
 6141    let text = r#"
 6142        use mod1::mod2::{mod3, mod4};
 6143
 6144        fn fn_1(param1: bool, param2: &str) {
 6145            let var1 = "text";
 6146        }
 6147    "#
 6148    .unindent();
 6149
 6150    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
 6151    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 6152    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 6153
 6154    editor
 6155        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 6156        .await;
 6157
 6158    editor.update_in(cx, |editor, window, cx| {
 6159        editor.change_selections(None, window, cx, |s| {
 6160            s.select_display_ranges([
 6161                DisplayPoint::new(DisplayRow(0), 25)..DisplayPoint::new(DisplayRow(0), 25),
 6162                DisplayPoint::new(DisplayRow(2), 24)..DisplayPoint::new(DisplayRow(2), 12),
 6163                DisplayPoint::new(DisplayRow(3), 18)..DisplayPoint::new(DisplayRow(3), 18),
 6164            ]);
 6165        });
 6166        editor.select_larger_syntax_node(&SelectLargerSyntaxNode, window, cx);
 6167    });
 6168    editor.update(cx, |editor, cx| {
 6169        assert_text_with_selections(
 6170            editor,
 6171            indoc! {r#"
 6172                use mod1::mod2::{mod3, «mod4ˇ»};
 6173
 6174                fn fn_1«ˇ(param1: bool, param2: &str)» {
 6175                    let var1 = "«ˇtext»";
 6176                }
 6177            "#},
 6178            cx,
 6179        );
 6180    });
 6181
 6182    editor.update_in(cx, |editor, window, cx| {
 6183        editor.select_larger_syntax_node(&SelectLargerSyntaxNode, window, cx);
 6184    });
 6185    editor.update(cx, |editor, cx| {
 6186        assert_text_with_selections(
 6187            editor,
 6188            indoc! {r#"
 6189                use mod1::mod2::«{mod3, mod4}ˇ»;
 6190
 6191                «ˇfn fn_1(param1: bool, param2: &str) {
 6192                    let var1 = "text";
 6193 6194            "#},
 6195            cx,
 6196        );
 6197    });
 6198
 6199    editor.update_in(cx, |editor, window, cx| {
 6200        editor.select_larger_syntax_node(&SelectLargerSyntaxNode, window, cx);
 6201    });
 6202    assert_eq!(
 6203        editor.update(cx, |editor, cx| editor.selections.display_ranges(cx)),
 6204        &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 6205    );
 6206
 6207    // Trying to expand the selected syntax node one more time has no effect.
 6208    editor.update_in(cx, |editor, window, cx| {
 6209        editor.select_larger_syntax_node(&SelectLargerSyntaxNode, window, cx);
 6210    });
 6211    assert_eq!(
 6212        editor.update(cx, |editor, cx| editor.selections.display_ranges(cx)),
 6213        &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 6214    );
 6215
 6216    editor.update_in(cx, |editor, window, cx| {
 6217        editor.select_smaller_syntax_node(&SelectSmallerSyntaxNode, window, cx);
 6218    });
 6219    editor.update(cx, |editor, cx| {
 6220        assert_text_with_selections(
 6221            editor,
 6222            indoc! {r#"
 6223                use mod1::mod2::«{mod3, mod4}ˇ»;
 6224
 6225                «ˇfn fn_1(param1: bool, param2: &str) {
 6226                    let var1 = "text";
 6227 6228            "#},
 6229            cx,
 6230        );
 6231    });
 6232
 6233    editor.update_in(cx, |editor, window, cx| {
 6234        editor.select_smaller_syntax_node(&SelectSmallerSyntaxNode, window, cx);
 6235    });
 6236    editor.update(cx, |editor, cx| {
 6237        assert_text_with_selections(
 6238            editor,
 6239            indoc! {r#"
 6240                use mod1::mod2::{mod3, «mod4ˇ»};
 6241
 6242                fn fn_1«ˇ(param1: bool, param2: &str)» {
 6243                    let var1 = "«ˇtext»";
 6244                }
 6245            "#},
 6246            cx,
 6247        );
 6248    });
 6249
 6250    editor.update_in(cx, |editor, window, cx| {
 6251        editor.select_smaller_syntax_node(&SelectSmallerSyntaxNode, window, cx);
 6252    });
 6253    editor.update(cx, |editor, cx| {
 6254        assert_text_with_selections(
 6255            editor,
 6256            indoc! {r#"
 6257                use mod1::mod2::{mod3, mo«ˇ»d4};
 6258
 6259                fn fn_1(para«ˇm1: bool, pa»ram2: &str) {
 6260                    let var1 = "te«ˇ»xt";
 6261                }
 6262            "#},
 6263            cx,
 6264        );
 6265    });
 6266
 6267    // Trying to shrink the selected syntax node one more time has no effect.
 6268    editor.update_in(cx, |editor, window, cx| {
 6269        editor.select_smaller_syntax_node(&SelectSmallerSyntaxNode, window, cx);
 6270    });
 6271    editor.update_in(cx, |editor, _, cx| {
 6272        assert_text_with_selections(
 6273            editor,
 6274            indoc! {r#"
 6275                use mod1::mod2::{mod3, mo«ˇ»d4};
 6276
 6277                fn fn_1(para«ˇm1: bool, pa»ram2: &str) {
 6278                    let var1 = "te«ˇ»xt";
 6279                }
 6280            "#},
 6281            cx,
 6282        );
 6283    });
 6284
 6285    // Ensure that we keep expanding the selection if the larger selection starts or ends within
 6286    // a fold.
 6287    editor.update_in(cx, |editor, window, cx| {
 6288        editor.fold_creases(
 6289            vec![
 6290                Crease::simple(
 6291                    Point::new(0, 21)..Point::new(0, 24),
 6292                    FoldPlaceholder::test(),
 6293                ),
 6294                Crease::simple(
 6295                    Point::new(3, 20)..Point::new(3, 22),
 6296                    FoldPlaceholder::test(),
 6297                ),
 6298            ],
 6299            true,
 6300            window,
 6301            cx,
 6302        );
 6303        editor.select_larger_syntax_node(&SelectLargerSyntaxNode, window, cx);
 6304    });
 6305    editor.update(cx, |editor, cx| {
 6306        assert_text_with_selections(
 6307            editor,
 6308            indoc! {r#"
 6309                use mod1::mod2::«{mod3, mod4}ˇ»;
 6310
 6311                fn fn_1«ˇ(param1: bool, param2: &str)» {
 6312                    «ˇlet var1 = "text";»
 6313                }
 6314            "#},
 6315            cx,
 6316        );
 6317    });
 6318}
 6319
 6320#[gpui::test]
 6321async fn test_fold_function_bodies(cx: &mut TestAppContext) {
 6322    init_test(cx, |_| {});
 6323
 6324    let base_text = r#"
 6325        impl A {
 6326            // this is an uncommitted comment
 6327
 6328            fn b() {
 6329                c();
 6330            }
 6331
 6332            // this is another uncommitted comment
 6333
 6334            fn d() {
 6335                // e
 6336                // f
 6337            }
 6338        }
 6339
 6340        fn g() {
 6341            // h
 6342        }
 6343    "#
 6344    .unindent();
 6345
 6346    let text = r#"
 6347        ˇimpl A {
 6348
 6349            fn b() {
 6350                c();
 6351            }
 6352
 6353            fn d() {
 6354                // e
 6355                // f
 6356            }
 6357        }
 6358
 6359        fn g() {
 6360            // h
 6361        }
 6362    "#
 6363    .unindent();
 6364
 6365    let mut cx = EditorLspTestContext::new_rust(Default::default(), cx).await;
 6366    cx.set_state(&text);
 6367    cx.set_head_text(&base_text);
 6368    cx.update_editor(|editor, window, cx| {
 6369        editor.expand_all_diff_hunks(&Default::default(), window, cx);
 6370    });
 6371
 6372    cx.assert_state_with_diff(
 6373        "
 6374        ˇimpl A {
 6375      -     // this is an uncommitted comment
 6376
 6377            fn b() {
 6378                c();
 6379            }
 6380
 6381      -     // this is another uncommitted comment
 6382      -
 6383            fn d() {
 6384                // e
 6385                // f
 6386            }
 6387        }
 6388
 6389        fn g() {
 6390            // h
 6391        }
 6392    "
 6393        .unindent(),
 6394    );
 6395
 6396    let expected_display_text = "
 6397        impl A {
 6398            // this is an uncommitted comment
 6399
 6400            fn b() {
 6401 6402            }
 6403
 6404            // this is another uncommitted comment
 6405
 6406            fn d() {
 6407 6408            }
 6409        }
 6410
 6411        fn g() {
 6412 6413        }
 6414        "
 6415    .unindent();
 6416
 6417    cx.update_editor(|editor, window, cx| {
 6418        editor.fold_function_bodies(&FoldFunctionBodies, window, cx);
 6419        assert_eq!(editor.display_text(cx), expected_display_text);
 6420    });
 6421}
 6422
 6423#[gpui::test]
 6424async fn test_autoindent(cx: &mut TestAppContext) {
 6425    init_test(cx, |_| {});
 6426
 6427    let language = Arc::new(
 6428        Language::new(
 6429            LanguageConfig {
 6430                brackets: BracketPairConfig {
 6431                    pairs: vec![
 6432                        BracketPair {
 6433                            start: "{".to_string(),
 6434                            end: "}".to_string(),
 6435                            close: false,
 6436                            surround: false,
 6437                            newline: true,
 6438                        },
 6439                        BracketPair {
 6440                            start: "(".to_string(),
 6441                            end: ")".to_string(),
 6442                            close: false,
 6443                            surround: false,
 6444                            newline: true,
 6445                        },
 6446                    ],
 6447                    ..Default::default()
 6448                },
 6449                ..Default::default()
 6450            },
 6451            Some(tree_sitter_rust::LANGUAGE.into()),
 6452        )
 6453        .with_indents_query(
 6454            r#"
 6455                (_ "(" ")" @end) @indent
 6456                (_ "{" "}" @end) @indent
 6457            "#,
 6458        )
 6459        .unwrap(),
 6460    );
 6461
 6462    let text = "fn a() {}";
 6463
 6464    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
 6465    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 6466    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 6467    editor
 6468        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 6469        .await;
 6470
 6471    editor.update_in(cx, |editor, window, cx| {
 6472        editor.change_selections(None, window, cx, |s| s.select_ranges([5..5, 8..8, 9..9]));
 6473        editor.newline(&Newline, window, cx);
 6474        assert_eq!(editor.text(cx), "fn a(\n    \n) {\n    \n}\n");
 6475        assert_eq!(
 6476            editor.selections.ranges(cx),
 6477            &[
 6478                Point::new(1, 4)..Point::new(1, 4),
 6479                Point::new(3, 4)..Point::new(3, 4),
 6480                Point::new(5, 0)..Point::new(5, 0)
 6481            ]
 6482        );
 6483    });
 6484}
 6485
 6486#[gpui::test]
 6487async fn test_autoindent_selections(cx: &mut TestAppContext) {
 6488    init_test(cx, |_| {});
 6489
 6490    {
 6491        let mut cx = EditorLspTestContext::new_rust(Default::default(), cx).await;
 6492        cx.set_state(indoc! {"
 6493            impl A {
 6494
 6495                fn b() {}
 6496
 6497            «fn c() {
 6498
 6499            }ˇ»
 6500            }
 6501        "});
 6502
 6503        cx.update_editor(|editor, window, cx| {
 6504            editor.autoindent(&Default::default(), window, cx);
 6505        });
 6506
 6507        cx.assert_editor_state(indoc! {"
 6508            impl A {
 6509
 6510                fn b() {}
 6511
 6512                «fn c() {
 6513
 6514                }ˇ»
 6515            }
 6516        "});
 6517    }
 6518
 6519    {
 6520        let mut cx = EditorTestContext::new_multibuffer(
 6521            cx,
 6522            [indoc! { "
 6523                impl A {
 6524                «
 6525                // a
 6526                fn b(){}
 6527                »
 6528                «
 6529                    }
 6530                    fn c(){}
 6531                »
 6532            "}],
 6533        );
 6534
 6535        let buffer = cx.update_editor(|editor, _, cx| {
 6536            let buffer = editor.buffer().update(cx, |buffer, _| {
 6537                buffer.all_buffers().iter().next().unwrap().clone()
 6538            });
 6539            buffer.update(cx, |buffer, cx| buffer.set_language(Some(rust_lang()), cx));
 6540            buffer
 6541        });
 6542
 6543        cx.run_until_parked();
 6544        cx.update_editor(|editor, window, cx| {
 6545            editor.select_all(&Default::default(), window, cx);
 6546            editor.autoindent(&Default::default(), window, cx)
 6547        });
 6548        cx.run_until_parked();
 6549
 6550        cx.update(|_, cx| {
 6551            assert_eq!(
 6552                buffer.read(cx).text(),
 6553                indoc! { "
 6554                    impl A {
 6555
 6556                        // a
 6557                        fn b(){}
 6558
 6559
 6560                    }
 6561                    fn c(){}
 6562
 6563                " }
 6564            )
 6565        });
 6566    }
 6567}
 6568
 6569#[gpui::test]
 6570async fn test_autoclose_and_auto_surround_pairs(cx: &mut TestAppContext) {
 6571    init_test(cx, |_| {});
 6572
 6573    let mut cx = EditorTestContext::new(cx).await;
 6574
 6575    let language = Arc::new(Language::new(
 6576        LanguageConfig {
 6577            brackets: BracketPairConfig {
 6578                pairs: vec![
 6579                    BracketPair {
 6580                        start: "{".to_string(),
 6581                        end: "}".to_string(),
 6582                        close: true,
 6583                        surround: true,
 6584                        newline: true,
 6585                    },
 6586                    BracketPair {
 6587                        start: "(".to_string(),
 6588                        end: ")".to_string(),
 6589                        close: true,
 6590                        surround: true,
 6591                        newline: true,
 6592                    },
 6593                    BracketPair {
 6594                        start: "/*".to_string(),
 6595                        end: " */".to_string(),
 6596                        close: true,
 6597                        surround: true,
 6598                        newline: true,
 6599                    },
 6600                    BracketPair {
 6601                        start: "[".to_string(),
 6602                        end: "]".to_string(),
 6603                        close: false,
 6604                        surround: false,
 6605                        newline: true,
 6606                    },
 6607                    BracketPair {
 6608                        start: "\"".to_string(),
 6609                        end: "\"".to_string(),
 6610                        close: true,
 6611                        surround: true,
 6612                        newline: false,
 6613                    },
 6614                    BracketPair {
 6615                        start: "<".to_string(),
 6616                        end: ">".to_string(),
 6617                        close: false,
 6618                        surround: true,
 6619                        newline: true,
 6620                    },
 6621                ],
 6622                ..Default::default()
 6623            },
 6624            autoclose_before: "})]".to_string(),
 6625            ..Default::default()
 6626        },
 6627        Some(tree_sitter_rust::LANGUAGE.into()),
 6628    ));
 6629
 6630    cx.language_registry().add(language.clone());
 6631    cx.update_buffer(|buffer, cx| {
 6632        buffer.set_language(Some(language), cx);
 6633    });
 6634
 6635    cx.set_state(
 6636        &r#"
 6637            🏀ˇ
 6638            εˇ
 6639            ❤️ˇ
 6640        "#
 6641        .unindent(),
 6642    );
 6643
 6644    // autoclose multiple nested brackets at multiple cursors
 6645    cx.update_editor(|editor, window, cx| {
 6646        editor.handle_input("{", window, cx);
 6647        editor.handle_input("{", window, cx);
 6648        editor.handle_input("{", window, cx);
 6649    });
 6650    cx.assert_editor_state(
 6651        &"
 6652            🏀{{{ˇ}}}
 6653            ε{{{ˇ}}}
 6654            ❤️{{{ˇ}}}
 6655        "
 6656        .unindent(),
 6657    );
 6658
 6659    // insert a different closing bracket
 6660    cx.update_editor(|editor, window, cx| {
 6661        editor.handle_input(")", window, cx);
 6662    });
 6663    cx.assert_editor_state(
 6664        &"
 6665            🏀{{{)ˇ}}}
 6666            ε{{{)ˇ}}}
 6667            ❤️{{{)ˇ}}}
 6668        "
 6669        .unindent(),
 6670    );
 6671
 6672    // skip over the auto-closed brackets when typing a closing bracket
 6673    cx.update_editor(|editor, window, cx| {
 6674        editor.move_right(&MoveRight, window, cx);
 6675        editor.handle_input("}", window, cx);
 6676        editor.handle_input("}", window, cx);
 6677        editor.handle_input("}", window, cx);
 6678    });
 6679    cx.assert_editor_state(
 6680        &"
 6681            🏀{{{)}}}}ˇ
 6682            ε{{{)}}}}ˇ
 6683            ❤️{{{)}}}}ˇ
 6684        "
 6685        .unindent(),
 6686    );
 6687
 6688    // autoclose multi-character pairs
 6689    cx.set_state(
 6690        &"
 6691            ˇ
 6692            ˇ
 6693        "
 6694        .unindent(),
 6695    );
 6696    cx.update_editor(|editor, window, cx| {
 6697        editor.handle_input("/", window, cx);
 6698        editor.handle_input("*", window, cx);
 6699    });
 6700    cx.assert_editor_state(
 6701        &"
 6702            /*ˇ */
 6703            /*ˇ */
 6704        "
 6705        .unindent(),
 6706    );
 6707
 6708    // one cursor autocloses a multi-character pair, one cursor
 6709    // does not autoclose.
 6710    cx.set_state(
 6711        &"
 6712 6713            ˇ
 6714        "
 6715        .unindent(),
 6716    );
 6717    cx.update_editor(|editor, window, cx| editor.handle_input("*", window, cx));
 6718    cx.assert_editor_state(
 6719        &"
 6720            /*ˇ */
 6721 6722        "
 6723        .unindent(),
 6724    );
 6725
 6726    // Don't autoclose if the next character isn't whitespace and isn't
 6727    // listed in the language's "autoclose_before" section.
 6728    cx.set_state("ˇa b");
 6729    cx.update_editor(|editor, window, cx| editor.handle_input("{", window, cx));
 6730    cx.assert_editor_state("{ˇa b");
 6731
 6732    // Don't autoclose if `close` is false for the bracket pair
 6733    cx.set_state("ˇ");
 6734    cx.update_editor(|editor, window, cx| editor.handle_input("[", window, cx));
 6735    cx.assert_editor_state("");
 6736
 6737    // Surround with brackets if text is selected
 6738    cx.set_state("«aˇ» b");
 6739    cx.update_editor(|editor, window, cx| editor.handle_input("{", window, cx));
 6740    cx.assert_editor_state("{«aˇ»} b");
 6741
 6742    // Autoclose when not immediately after a word character
 6743    cx.set_state("a ˇ");
 6744    cx.update_editor(|editor, window, cx| editor.handle_input("\"", window, cx));
 6745    cx.assert_editor_state("a \"ˇ\"");
 6746
 6747    // Autoclose pair where the start and end characters are the same
 6748    cx.update_editor(|editor, window, cx| editor.handle_input("\"", window, cx));
 6749    cx.assert_editor_state("a \"\"ˇ");
 6750
 6751    // Don't autoclose when immediately after a word character
 6752    cx.set_state("");
 6753    cx.update_editor(|editor, window, cx| editor.handle_input("\"", window, cx));
 6754    cx.assert_editor_state("a\"ˇ");
 6755
 6756    // Do autoclose when after a non-word character
 6757    cx.set_state("");
 6758    cx.update_editor(|editor, window, cx| editor.handle_input("\"", window, cx));
 6759    cx.assert_editor_state("{\"ˇ\"");
 6760
 6761    // Non identical pairs autoclose regardless of preceding character
 6762    cx.set_state("");
 6763    cx.update_editor(|editor, window, cx| editor.handle_input("{", window, cx));
 6764    cx.assert_editor_state("a{ˇ}");
 6765
 6766    // Don't autoclose pair if autoclose is disabled
 6767    cx.set_state("ˇ");
 6768    cx.update_editor(|editor, window, cx| editor.handle_input("<", window, cx));
 6769    cx.assert_editor_state("");
 6770
 6771    // Surround with brackets if text is selected and auto_surround is enabled, even if autoclose is disabled
 6772    cx.set_state("«aˇ» b");
 6773    cx.update_editor(|editor, window, cx| editor.handle_input("<", window, cx));
 6774    cx.assert_editor_state("<«aˇ»> b");
 6775}
 6776
 6777#[gpui::test]
 6778async fn test_always_treat_brackets_as_autoclosed_skip_over(cx: &mut TestAppContext) {
 6779    init_test(cx, |settings| {
 6780        settings.defaults.always_treat_brackets_as_autoclosed = Some(true);
 6781    });
 6782
 6783    let mut cx = EditorTestContext::new(cx).await;
 6784
 6785    let language = Arc::new(Language::new(
 6786        LanguageConfig {
 6787            brackets: BracketPairConfig {
 6788                pairs: vec![
 6789                    BracketPair {
 6790                        start: "{".to_string(),
 6791                        end: "}".to_string(),
 6792                        close: true,
 6793                        surround: true,
 6794                        newline: true,
 6795                    },
 6796                    BracketPair {
 6797                        start: "(".to_string(),
 6798                        end: ")".to_string(),
 6799                        close: true,
 6800                        surround: true,
 6801                        newline: true,
 6802                    },
 6803                    BracketPair {
 6804                        start: "[".to_string(),
 6805                        end: "]".to_string(),
 6806                        close: false,
 6807                        surround: false,
 6808                        newline: true,
 6809                    },
 6810                ],
 6811                ..Default::default()
 6812            },
 6813            autoclose_before: "})]".to_string(),
 6814            ..Default::default()
 6815        },
 6816        Some(tree_sitter_rust::LANGUAGE.into()),
 6817    ));
 6818
 6819    cx.language_registry().add(language.clone());
 6820    cx.update_buffer(|buffer, cx| {
 6821        buffer.set_language(Some(language), cx);
 6822    });
 6823
 6824    cx.set_state(
 6825        &"
 6826            ˇ
 6827            ˇ
 6828            ˇ
 6829        "
 6830        .unindent(),
 6831    );
 6832
 6833    // ensure only matching closing brackets are skipped over
 6834    cx.update_editor(|editor, window, cx| {
 6835        editor.handle_input("}", window, cx);
 6836        editor.move_left(&MoveLeft, window, cx);
 6837        editor.handle_input(")", window, cx);
 6838        editor.move_left(&MoveLeft, window, cx);
 6839    });
 6840    cx.assert_editor_state(
 6841        &"
 6842            ˇ)}
 6843            ˇ)}
 6844            ˇ)}
 6845        "
 6846        .unindent(),
 6847    );
 6848
 6849    // skip-over closing brackets at multiple cursors
 6850    cx.update_editor(|editor, window, cx| {
 6851        editor.handle_input(")", window, cx);
 6852        editor.handle_input("}", window, cx);
 6853    });
 6854    cx.assert_editor_state(
 6855        &"
 6856            )}ˇ
 6857            )}ˇ
 6858            )}ˇ
 6859        "
 6860        .unindent(),
 6861    );
 6862
 6863    // ignore non-close brackets
 6864    cx.update_editor(|editor, window, cx| {
 6865        editor.handle_input("]", window, cx);
 6866        editor.move_left(&MoveLeft, window, cx);
 6867        editor.handle_input("]", window, cx);
 6868    });
 6869    cx.assert_editor_state(
 6870        &"
 6871            )}]ˇ]
 6872            )}]ˇ]
 6873            )}]ˇ]
 6874        "
 6875        .unindent(),
 6876    );
 6877}
 6878
 6879#[gpui::test]
 6880async fn test_autoclose_with_embedded_language(cx: &mut TestAppContext) {
 6881    init_test(cx, |_| {});
 6882
 6883    let mut cx = EditorTestContext::new(cx).await;
 6884
 6885    let html_language = Arc::new(
 6886        Language::new(
 6887            LanguageConfig {
 6888                name: "HTML".into(),
 6889                brackets: BracketPairConfig {
 6890                    pairs: vec![
 6891                        BracketPair {
 6892                            start: "<".into(),
 6893                            end: ">".into(),
 6894                            close: true,
 6895                            ..Default::default()
 6896                        },
 6897                        BracketPair {
 6898                            start: "{".into(),
 6899                            end: "}".into(),
 6900                            close: true,
 6901                            ..Default::default()
 6902                        },
 6903                        BracketPair {
 6904                            start: "(".into(),
 6905                            end: ")".into(),
 6906                            close: true,
 6907                            ..Default::default()
 6908                        },
 6909                    ],
 6910                    ..Default::default()
 6911                },
 6912                autoclose_before: "})]>".into(),
 6913                ..Default::default()
 6914            },
 6915            Some(tree_sitter_html::LANGUAGE.into()),
 6916        )
 6917        .with_injection_query(
 6918            r#"
 6919            (script_element
 6920                (raw_text) @injection.content
 6921                (#set! injection.language "javascript"))
 6922            "#,
 6923        )
 6924        .unwrap(),
 6925    );
 6926
 6927    let javascript_language = Arc::new(Language::new(
 6928        LanguageConfig {
 6929            name: "JavaScript".into(),
 6930            brackets: BracketPairConfig {
 6931                pairs: vec![
 6932                    BracketPair {
 6933                        start: "/*".into(),
 6934                        end: " */".into(),
 6935                        close: true,
 6936                        ..Default::default()
 6937                    },
 6938                    BracketPair {
 6939                        start: "{".into(),
 6940                        end: "}".into(),
 6941                        close: true,
 6942                        ..Default::default()
 6943                    },
 6944                    BracketPair {
 6945                        start: "(".into(),
 6946                        end: ")".into(),
 6947                        close: true,
 6948                        ..Default::default()
 6949                    },
 6950                ],
 6951                ..Default::default()
 6952            },
 6953            autoclose_before: "})]>".into(),
 6954            ..Default::default()
 6955        },
 6956        Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
 6957    ));
 6958
 6959    cx.language_registry().add(html_language.clone());
 6960    cx.language_registry().add(javascript_language.clone());
 6961
 6962    cx.update_buffer(|buffer, cx| {
 6963        buffer.set_language(Some(html_language), cx);
 6964    });
 6965
 6966    cx.set_state(
 6967        &r#"
 6968            <body>ˇ
 6969                <script>
 6970                    var x = 1;ˇ
 6971                </script>
 6972            </body>ˇ
 6973        "#
 6974        .unindent(),
 6975    );
 6976
 6977    // Precondition: different languages are active at different locations.
 6978    cx.update_editor(|editor, window, cx| {
 6979        let snapshot = editor.snapshot(window, cx);
 6980        let cursors = editor.selections.ranges::<usize>(cx);
 6981        let languages = cursors
 6982            .iter()
 6983            .map(|c| snapshot.language_at(c.start).unwrap().name())
 6984            .collect::<Vec<_>>();
 6985        assert_eq!(
 6986            languages,
 6987            &["HTML".into(), "JavaScript".into(), "HTML".into()]
 6988        );
 6989    });
 6990
 6991    // Angle brackets autoclose in HTML, but not JavaScript.
 6992    cx.update_editor(|editor, window, cx| {
 6993        editor.handle_input("<", window, cx);
 6994        editor.handle_input("a", window, cx);
 6995    });
 6996    cx.assert_editor_state(
 6997        &r#"
 6998            <body><aˇ>
 6999                <script>
 7000                    var x = 1;<aˇ
 7001                </script>
 7002            </body><aˇ>
 7003        "#
 7004        .unindent(),
 7005    );
 7006
 7007    // Curly braces and parens autoclose in both HTML and JavaScript.
 7008    cx.update_editor(|editor, window, cx| {
 7009        editor.handle_input(" b=", window, cx);
 7010        editor.handle_input("{", window, cx);
 7011        editor.handle_input("c", window, cx);
 7012        editor.handle_input("(", window, cx);
 7013    });
 7014    cx.assert_editor_state(
 7015        &r#"
 7016            <body><a b={c(ˇ)}>
 7017                <script>
 7018                    var x = 1;<a b={c(ˇ)}
 7019                </script>
 7020            </body><a b={c(ˇ)}>
 7021        "#
 7022        .unindent(),
 7023    );
 7024
 7025    // Brackets that were already autoclosed are skipped.
 7026    cx.update_editor(|editor, window, cx| {
 7027        editor.handle_input(")", window, cx);
 7028        editor.handle_input("d", window, cx);
 7029        editor.handle_input("}", window, cx);
 7030    });
 7031    cx.assert_editor_state(
 7032        &r#"
 7033            <body><a b={c()d}ˇ>
 7034                <script>
 7035                    var x = 1;<a b={c()d}ˇ
 7036                </script>
 7037            </body><a b={c()d}ˇ>
 7038        "#
 7039        .unindent(),
 7040    );
 7041    cx.update_editor(|editor, window, cx| {
 7042        editor.handle_input(">", window, cx);
 7043    });
 7044    cx.assert_editor_state(
 7045        &r#"
 7046            <body><a b={c()d}>ˇ
 7047                <script>
 7048                    var x = 1;<a b={c()d}>ˇ
 7049                </script>
 7050            </body><a b={c()d}>ˇ
 7051        "#
 7052        .unindent(),
 7053    );
 7054
 7055    // Reset
 7056    cx.set_state(
 7057        &r#"
 7058            <body>ˇ
 7059                <script>
 7060                    var x = 1;ˇ
 7061                </script>
 7062            </body>ˇ
 7063        "#
 7064        .unindent(),
 7065    );
 7066
 7067    cx.update_editor(|editor, window, cx| {
 7068        editor.handle_input("<", window, cx);
 7069    });
 7070    cx.assert_editor_state(
 7071        &r#"
 7072            <body><ˇ>
 7073                <script>
 7074                    var x = 1;<ˇ
 7075                </script>
 7076            </body><ˇ>
 7077        "#
 7078        .unindent(),
 7079    );
 7080
 7081    // When backspacing, the closing angle brackets are removed.
 7082    cx.update_editor(|editor, window, cx| {
 7083        editor.backspace(&Backspace, window, cx);
 7084    });
 7085    cx.assert_editor_state(
 7086        &r#"
 7087            <body>ˇ
 7088                <script>
 7089                    var x = 1;ˇ
 7090                </script>
 7091            </body>ˇ
 7092        "#
 7093        .unindent(),
 7094    );
 7095
 7096    // Block comments autoclose in JavaScript, but not HTML.
 7097    cx.update_editor(|editor, window, cx| {
 7098        editor.handle_input("/", window, cx);
 7099        editor.handle_input("*", window, cx);
 7100    });
 7101    cx.assert_editor_state(
 7102        &r#"
 7103            <body>/*ˇ
 7104                <script>
 7105                    var x = 1;/*ˇ */
 7106                </script>
 7107            </body>/*ˇ
 7108        "#
 7109        .unindent(),
 7110    );
 7111}
 7112
 7113#[gpui::test]
 7114async fn test_autoclose_with_overrides(cx: &mut TestAppContext) {
 7115    init_test(cx, |_| {});
 7116
 7117    let mut cx = EditorTestContext::new(cx).await;
 7118
 7119    let rust_language = Arc::new(
 7120        Language::new(
 7121            LanguageConfig {
 7122                name: "Rust".into(),
 7123                brackets: serde_json::from_value(json!([
 7124                    { "start": "{", "end": "}", "close": true, "newline": true },
 7125                    { "start": "\"", "end": "\"", "close": true, "newline": false, "not_in": ["string"] },
 7126                ]))
 7127                .unwrap(),
 7128                autoclose_before: "})]>".into(),
 7129                ..Default::default()
 7130            },
 7131            Some(tree_sitter_rust::LANGUAGE.into()),
 7132        )
 7133        .with_override_query("(string_literal) @string")
 7134        .unwrap(),
 7135    );
 7136
 7137    cx.language_registry().add(rust_language.clone());
 7138    cx.update_buffer(|buffer, cx| {
 7139        buffer.set_language(Some(rust_language), cx);
 7140    });
 7141
 7142    cx.set_state(
 7143        &r#"
 7144            let x = ˇ
 7145        "#
 7146        .unindent(),
 7147    );
 7148
 7149    // Inserting a quotation mark. A closing quotation mark is automatically inserted.
 7150    cx.update_editor(|editor, window, cx| {
 7151        editor.handle_input("\"", window, cx);
 7152    });
 7153    cx.assert_editor_state(
 7154        &r#"
 7155            let x = "ˇ"
 7156        "#
 7157        .unindent(),
 7158    );
 7159
 7160    // Inserting another quotation mark. The cursor moves across the existing
 7161    // automatically-inserted quotation mark.
 7162    cx.update_editor(|editor, window, cx| {
 7163        editor.handle_input("\"", window, cx);
 7164    });
 7165    cx.assert_editor_state(
 7166        &r#"
 7167            let x = ""ˇ
 7168        "#
 7169        .unindent(),
 7170    );
 7171
 7172    // Reset
 7173    cx.set_state(
 7174        &r#"
 7175            let x = ˇ
 7176        "#
 7177        .unindent(),
 7178    );
 7179
 7180    // Inserting a quotation mark inside of a string. A second quotation mark is not inserted.
 7181    cx.update_editor(|editor, window, cx| {
 7182        editor.handle_input("\"", window, cx);
 7183        editor.handle_input(" ", window, cx);
 7184        editor.move_left(&Default::default(), window, cx);
 7185        editor.handle_input("\\", window, cx);
 7186        editor.handle_input("\"", window, cx);
 7187    });
 7188    cx.assert_editor_state(
 7189        &r#"
 7190            let x = "\"ˇ "
 7191        "#
 7192        .unindent(),
 7193    );
 7194
 7195    // Inserting a closing quotation mark at the position of an automatically-inserted quotation
 7196    // mark. Nothing is inserted.
 7197    cx.update_editor(|editor, window, cx| {
 7198        editor.move_right(&Default::default(), window, cx);
 7199        editor.handle_input("\"", window, cx);
 7200    });
 7201    cx.assert_editor_state(
 7202        &r#"
 7203            let x = "\" "ˇ
 7204        "#
 7205        .unindent(),
 7206    );
 7207}
 7208
 7209#[gpui::test]
 7210async fn test_surround_with_pair(cx: &mut TestAppContext) {
 7211    init_test(cx, |_| {});
 7212
 7213    let language = Arc::new(Language::new(
 7214        LanguageConfig {
 7215            brackets: BracketPairConfig {
 7216                pairs: vec![
 7217                    BracketPair {
 7218                        start: "{".to_string(),
 7219                        end: "}".to_string(),
 7220                        close: true,
 7221                        surround: true,
 7222                        newline: true,
 7223                    },
 7224                    BracketPair {
 7225                        start: "/* ".to_string(),
 7226                        end: "*/".to_string(),
 7227                        close: true,
 7228                        surround: true,
 7229                        ..Default::default()
 7230                    },
 7231                ],
 7232                ..Default::default()
 7233            },
 7234            ..Default::default()
 7235        },
 7236        Some(tree_sitter_rust::LANGUAGE.into()),
 7237    ));
 7238
 7239    let text = r#"
 7240        a
 7241        b
 7242        c
 7243    "#
 7244    .unindent();
 7245
 7246    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
 7247    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 7248    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 7249    editor
 7250        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 7251        .await;
 7252
 7253    editor.update_in(cx, |editor, window, cx| {
 7254        editor.change_selections(None, window, cx, |s| {
 7255            s.select_display_ranges([
 7256                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 7257                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 7258                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1),
 7259            ])
 7260        });
 7261
 7262        editor.handle_input("{", window, cx);
 7263        editor.handle_input("{", window, cx);
 7264        editor.handle_input("{", window, cx);
 7265        assert_eq!(
 7266            editor.text(cx),
 7267            "
 7268                {{{a}}}
 7269                {{{b}}}
 7270                {{{c}}}
 7271            "
 7272            .unindent()
 7273        );
 7274        assert_eq!(
 7275            editor.selections.display_ranges(cx),
 7276            [
 7277                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 4),
 7278                DisplayPoint::new(DisplayRow(1), 3)..DisplayPoint::new(DisplayRow(1), 4),
 7279                DisplayPoint::new(DisplayRow(2), 3)..DisplayPoint::new(DisplayRow(2), 4)
 7280            ]
 7281        );
 7282
 7283        editor.undo(&Undo, window, cx);
 7284        editor.undo(&Undo, window, cx);
 7285        editor.undo(&Undo, window, cx);
 7286        assert_eq!(
 7287            editor.text(cx),
 7288            "
 7289                a
 7290                b
 7291                c
 7292            "
 7293            .unindent()
 7294        );
 7295        assert_eq!(
 7296            editor.selections.display_ranges(cx),
 7297            [
 7298                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 7299                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 7300                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1)
 7301            ]
 7302        );
 7303
 7304        // Ensure inserting the first character of a multi-byte bracket pair
 7305        // doesn't surround the selections with the bracket.
 7306        editor.handle_input("/", window, cx);
 7307        assert_eq!(
 7308            editor.text(cx),
 7309            "
 7310                /
 7311                /
 7312                /
 7313            "
 7314            .unindent()
 7315        );
 7316        assert_eq!(
 7317            editor.selections.display_ranges(cx),
 7318            [
 7319                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 7320                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 7321                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1)
 7322            ]
 7323        );
 7324
 7325        editor.undo(&Undo, window, cx);
 7326        assert_eq!(
 7327            editor.text(cx),
 7328            "
 7329                a
 7330                b
 7331                c
 7332            "
 7333            .unindent()
 7334        );
 7335        assert_eq!(
 7336            editor.selections.display_ranges(cx),
 7337            [
 7338                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 7339                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 7340                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1)
 7341            ]
 7342        );
 7343
 7344        // Ensure inserting the last character of a multi-byte bracket pair
 7345        // doesn't surround the selections with the bracket.
 7346        editor.handle_input("*", window, cx);
 7347        assert_eq!(
 7348            editor.text(cx),
 7349            "
 7350                *
 7351                *
 7352                *
 7353            "
 7354            .unindent()
 7355        );
 7356        assert_eq!(
 7357            editor.selections.display_ranges(cx),
 7358            [
 7359                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 7360                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 7361                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1)
 7362            ]
 7363        );
 7364    });
 7365}
 7366
 7367#[gpui::test]
 7368async fn test_delete_autoclose_pair(cx: &mut TestAppContext) {
 7369    init_test(cx, |_| {});
 7370
 7371    let language = Arc::new(Language::new(
 7372        LanguageConfig {
 7373            brackets: BracketPairConfig {
 7374                pairs: vec![BracketPair {
 7375                    start: "{".to_string(),
 7376                    end: "}".to_string(),
 7377                    close: true,
 7378                    surround: true,
 7379                    newline: true,
 7380                }],
 7381                ..Default::default()
 7382            },
 7383            autoclose_before: "}".to_string(),
 7384            ..Default::default()
 7385        },
 7386        Some(tree_sitter_rust::LANGUAGE.into()),
 7387    ));
 7388
 7389    let text = r#"
 7390        a
 7391        b
 7392        c
 7393    "#
 7394    .unindent();
 7395
 7396    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
 7397    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 7398    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 7399    editor
 7400        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 7401        .await;
 7402
 7403    editor.update_in(cx, |editor, window, cx| {
 7404        editor.change_selections(None, window, cx, |s| {
 7405            s.select_ranges([
 7406                Point::new(0, 1)..Point::new(0, 1),
 7407                Point::new(1, 1)..Point::new(1, 1),
 7408                Point::new(2, 1)..Point::new(2, 1),
 7409            ])
 7410        });
 7411
 7412        editor.handle_input("{", window, cx);
 7413        editor.handle_input("{", window, cx);
 7414        editor.handle_input("_", window, cx);
 7415        assert_eq!(
 7416            editor.text(cx),
 7417            "
 7418                a{{_}}
 7419                b{{_}}
 7420                c{{_}}
 7421            "
 7422            .unindent()
 7423        );
 7424        assert_eq!(
 7425            editor.selections.ranges::<Point>(cx),
 7426            [
 7427                Point::new(0, 4)..Point::new(0, 4),
 7428                Point::new(1, 4)..Point::new(1, 4),
 7429                Point::new(2, 4)..Point::new(2, 4)
 7430            ]
 7431        );
 7432
 7433        editor.backspace(&Default::default(), window, cx);
 7434        editor.backspace(&Default::default(), window, cx);
 7435        assert_eq!(
 7436            editor.text(cx),
 7437            "
 7438                a{}
 7439                b{}
 7440                c{}
 7441            "
 7442            .unindent()
 7443        );
 7444        assert_eq!(
 7445            editor.selections.ranges::<Point>(cx),
 7446            [
 7447                Point::new(0, 2)..Point::new(0, 2),
 7448                Point::new(1, 2)..Point::new(1, 2),
 7449                Point::new(2, 2)..Point::new(2, 2)
 7450            ]
 7451        );
 7452
 7453        editor.delete_to_previous_word_start(&Default::default(), window, cx);
 7454        assert_eq!(
 7455            editor.text(cx),
 7456            "
 7457                a
 7458                b
 7459                c
 7460            "
 7461            .unindent()
 7462        );
 7463        assert_eq!(
 7464            editor.selections.ranges::<Point>(cx),
 7465            [
 7466                Point::new(0, 1)..Point::new(0, 1),
 7467                Point::new(1, 1)..Point::new(1, 1),
 7468                Point::new(2, 1)..Point::new(2, 1)
 7469            ]
 7470        );
 7471    });
 7472}
 7473
 7474#[gpui::test]
 7475async fn test_always_treat_brackets_as_autoclosed_delete(cx: &mut TestAppContext) {
 7476    init_test(cx, |settings| {
 7477        settings.defaults.always_treat_brackets_as_autoclosed = Some(true);
 7478    });
 7479
 7480    let mut cx = EditorTestContext::new(cx).await;
 7481
 7482    let language = Arc::new(Language::new(
 7483        LanguageConfig {
 7484            brackets: BracketPairConfig {
 7485                pairs: vec![
 7486                    BracketPair {
 7487                        start: "{".to_string(),
 7488                        end: "}".to_string(),
 7489                        close: true,
 7490                        surround: true,
 7491                        newline: true,
 7492                    },
 7493                    BracketPair {
 7494                        start: "(".to_string(),
 7495                        end: ")".to_string(),
 7496                        close: true,
 7497                        surround: true,
 7498                        newline: true,
 7499                    },
 7500                    BracketPair {
 7501                        start: "[".to_string(),
 7502                        end: "]".to_string(),
 7503                        close: false,
 7504                        surround: true,
 7505                        newline: true,
 7506                    },
 7507                ],
 7508                ..Default::default()
 7509            },
 7510            autoclose_before: "})]".to_string(),
 7511            ..Default::default()
 7512        },
 7513        Some(tree_sitter_rust::LANGUAGE.into()),
 7514    ));
 7515
 7516    cx.language_registry().add(language.clone());
 7517    cx.update_buffer(|buffer, cx| {
 7518        buffer.set_language(Some(language), cx);
 7519    });
 7520
 7521    cx.set_state(
 7522        &"
 7523            {(ˇ)}
 7524            [[ˇ]]
 7525            {(ˇ)}
 7526        "
 7527        .unindent(),
 7528    );
 7529
 7530    cx.update_editor(|editor, window, cx| {
 7531        editor.backspace(&Default::default(), window, cx);
 7532        editor.backspace(&Default::default(), window, cx);
 7533    });
 7534
 7535    cx.assert_editor_state(
 7536        &"
 7537            ˇ
 7538            ˇ]]
 7539            ˇ
 7540        "
 7541        .unindent(),
 7542    );
 7543
 7544    cx.update_editor(|editor, window, cx| {
 7545        editor.handle_input("{", window, cx);
 7546        editor.handle_input("{", window, cx);
 7547        editor.move_right(&MoveRight, window, cx);
 7548        editor.move_right(&MoveRight, window, cx);
 7549        editor.move_left(&MoveLeft, window, cx);
 7550        editor.move_left(&MoveLeft, window, cx);
 7551        editor.backspace(&Default::default(), window, cx);
 7552    });
 7553
 7554    cx.assert_editor_state(
 7555        &"
 7556            {ˇ}
 7557            {ˇ}]]
 7558            {ˇ}
 7559        "
 7560        .unindent(),
 7561    );
 7562
 7563    cx.update_editor(|editor, window, cx| {
 7564        editor.backspace(&Default::default(), window, cx);
 7565    });
 7566
 7567    cx.assert_editor_state(
 7568        &"
 7569            ˇ
 7570            ˇ]]
 7571            ˇ
 7572        "
 7573        .unindent(),
 7574    );
 7575}
 7576
 7577#[gpui::test]
 7578async fn test_auto_replace_emoji_shortcode(cx: &mut TestAppContext) {
 7579    init_test(cx, |_| {});
 7580
 7581    let language = Arc::new(Language::new(
 7582        LanguageConfig::default(),
 7583        Some(tree_sitter_rust::LANGUAGE.into()),
 7584    ));
 7585
 7586    let buffer = cx.new(|cx| Buffer::local("", cx).with_language(language, cx));
 7587    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 7588    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 7589    editor
 7590        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 7591        .await;
 7592
 7593    editor.update_in(cx, |editor, window, cx| {
 7594        editor.set_auto_replace_emoji_shortcode(true);
 7595
 7596        editor.handle_input("Hello ", window, cx);
 7597        editor.handle_input(":wave", window, cx);
 7598        assert_eq!(editor.text(cx), "Hello :wave".unindent());
 7599
 7600        editor.handle_input(":", window, cx);
 7601        assert_eq!(editor.text(cx), "Hello 👋".unindent());
 7602
 7603        editor.handle_input(" :smile", window, cx);
 7604        assert_eq!(editor.text(cx), "Hello 👋 :smile".unindent());
 7605
 7606        editor.handle_input(":", window, cx);
 7607        assert_eq!(editor.text(cx), "Hello 👋 😄".unindent());
 7608
 7609        // Ensure shortcode gets replaced when it is part of a word that only consists of emojis
 7610        editor.handle_input(":wave", window, cx);
 7611        assert_eq!(editor.text(cx), "Hello 👋 😄:wave".unindent());
 7612
 7613        editor.handle_input(":", window, cx);
 7614        assert_eq!(editor.text(cx), "Hello 👋 😄👋".unindent());
 7615
 7616        editor.handle_input(":1", window, cx);
 7617        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1".unindent());
 7618
 7619        editor.handle_input(":", window, cx);
 7620        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1:".unindent());
 7621
 7622        // Ensure shortcode does not get replaced when it is part of a word
 7623        editor.handle_input(" Test:wave", window, cx);
 7624        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1: Test:wave".unindent());
 7625
 7626        editor.handle_input(":", window, cx);
 7627        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1: Test:wave:".unindent());
 7628
 7629        editor.set_auto_replace_emoji_shortcode(false);
 7630
 7631        // Ensure shortcode does not get replaced when auto replace is off
 7632        editor.handle_input(" :wave", window, cx);
 7633        assert_eq!(
 7634            editor.text(cx),
 7635            "Hello 👋 😄👋:1: Test:wave: :wave".unindent()
 7636        );
 7637
 7638        editor.handle_input(":", window, cx);
 7639        assert_eq!(
 7640            editor.text(cx),
 7641            "Hello 👋 😄👋:1: Test:wave: :wave:".unindent()
 7642        );
 7643    });
 7644}
 7645
 7646#[gpui::test]
 7647async fn test_snippet_placeholder_choices(cx: &mut TestAppContext) {
 7648    init_test(cx, |_| {});
 7649
 7650    let (text, insertion_ranges) = marked_text_ranges(
 7651        indoc! {"
 7652            ˇ
 7653        "},
 7654        false,
 7655    );
 7656
 7657    let buffer = cx.update(|cx| MultiBuffer::build_simple(&text, cx));
 7658    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 7659
 7660    _ = editor.update_in(cx, |editor, window, cx| {
 7661        let snippet = Snippet::parse("type ${1|,i32,u32|} = $2").unwrap();
 7662
 7663        editor
 7664            .insert_snippet(&insertion_ranges, snippet, window, cx)
 7665            .unwrap();
 7666
 7667        fn assert(editor: &mut Editor, cx: &mut Context<Editor>, marked_text: &str) {
 7668            let (expected_text, selection_ranges) = marked_text_ranges(marked_text, false);
 7669            assert_eq!(editor.text(cx), expected_text);
 7670            assert_eq!(editor.selections.ranges::<usize>(cx), selection_ranges);
 7671        }
 7672
 7673        assert(
 7674            editor,
 7675            cx,
 7676            indoc! {"
 7677            type «» =•
 7678            "},
 7679        );
 7680
 7681        assert!(editor.context_menu_visible(), "There should be a matches");
 7682    });
 7683}
 7684
 7685#[gpui::test]
 7686async fn test_snippets(cx: &mut TestAppContext) {
 7687    init_test(cx, |_| {});
 7688
 7689    let (text, insertion_ranges) = marked_text_ranges(
 7690        indoc! {"
 7691            a.ˇ b
 7692            a.ˇ b
 7693            a.ˇ b
 7694        "},
 7695        false,
 7696    );
 7697
 7698    let buffer = cx.update(|cx| MultiBuffer::build_simple(&text, cx));
 7699    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
 7700
 7701    editor.update_in(cx, |editor, window, cx| {
 7702        let snippet = Snippet::parse("f(${1:one}, ${2:two}, ${1:three})$0").unwrap();
 7703
 7704        editor
 7705            .insert_snippet(&insertion_ranges, snippet, window, cx)
 7706            .unwrap();
 7707
 7708        fn assert(editor: &mut Editor, cx: &mut Context<Editor>, marked_text: &str) {
 7709            let (expected_text, selection_ranges) = marked_text_ranges(marked_text, false);
 7710            assert_eq!(editor.text(cx), expected_text);
 7711            assert_eq!(editor.selections.ranges::<usize>(cx), selection_ranges);
 7712        }
 7713
 7714        assert(
 7715            editor,
 7716            cx,
 7717            indoc! {"
 7718                a.f(«one», two, «three») b
 7719                a.f(«one», two, «three») b
 7720                a.f(«one», two, «three») b
 7721            "},
 7722        );
 7723
 7724        // Can't move earlier than the first tab stop
 7725        assert!(!editor.move_to_prev_snippet_tabstop(window, cx));
 7726        assert(
 7727            editor,
 7728            cx,
 7729            indoc! {"
 7730                a.f(«one», two, «three») b
 7731                a.f(«one», two, «three») b
 7732                a.f(«one», two, «three») b
 7733            "},
 7734        );
 7735
 7736        assert!(editor.move_to_next_snippet_tabstop(window, cx));
 7737        assert(
 7738            editor,
 7739            cx,
 7740            indoc! {"
 7741                a.f(one, «two», three) b
 7742                a.f(one, «two», three) b
 7743                a.f(one, «two», three) b
 7744            "},
 7745        );
 7746
 7747        editor.move_to_prev_snippet_tabstop(window, cx);
 7748        assert(
 7749            editor,
 7750            cx,
 7751            indoc! {"
 7752                a.f(«one», two, «three») b
 7753                a.f(«one», two, «three») b
 7754                a.f(«one», two, «three») b
 7755            "},
 7756        );
 7757
 7758        assert!(editor.move_to_next_snippet_tabstop(window, cx));
 7759        assert(
 7760            editor,
 7761            cx,
 7762            indoc! {"
 7763                a.f(one, «two», three) b
 7764                a.f(one, «two», three) b
 7765                a.f(one, «two», three) b
 7766            "},
 7767        );
 7768        assert!(editor.move_to_next_snippet_tabstop(window, cx));
 7769        assert(
 7770            editor,
 7771            cx,
 7772            indoc! {"
 7773                a.f(one, two, three)ˇ b
 7774                a.f(one, two, three)ˇ b
 7775                a.f(one, two, three)ˇ b
 7776            "},
 7777        );
 7778
 7779        // As soon as the last tab stop is reached, snippet state is gone
 7780        editor.move_to_prev_snippet_tabstop(window, cx);
 7781        assert(
 7782            editor,
 7783            cx,
 7784            indoc! {"
 7785                a.f(one, two, three)ˇ b
 7786                a.f(one, two, three)ˇ b
 7787                a.f(one, two, three)ˇ b
 7788            "},
 7789        );
 7790    });
 7791}
 7792
 7793#[gpui::test]
 7794async fn test_document_format_during_save(cx: &mut TestAppContext) {
 7795    init_test(cx, |_| {});
 7796
 7797    let fs = FakeFs::new(cx.executor());
 7798    fs.insert_file(path!("/file.rs"), Default::default()).await;
 7799
 7800    let project = Project::test(fs, [path!("/file.rs").as_ref()], cx).await;
 7801
 7802    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 7803    language_registry.add(rust_lang());
 7804    let mut fake_servers = language_registry.register_fake_lsp(
 7805        "Rust",
 7806        FakeLspAdapter {
 7807            capabilities: lsp::ServerCapabilities {
 7808                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 7809                ..Default::default()
 7810            },
 7811            ..Default::default()
 7812        },
 7813    );
 7814
 7815    let buffer = project
 7816        .update(cx, |project, cx| {
 7817            project.open_local_buffer(path!("/file.rs"), cx)
 7818        })
 7819        .await
 7820        .unwrap();
 7821
 7822    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 7823    let (editor, cx) = cx.add_window_view(|window, cx| {
 7824        build_editor_with_project(project.clone(), buffer, window, cx)
 7825    });
 7826    editor.update_in(cx, |editor, window, cx| {
 7827        editor.set_text("one\ntwo\nthree\n", window, cx)
 7828    });
 7829    assert!(cx.read(|cx| editor.is_dirty(cx)));
 7830
 7831    cx.executor().start_waiting();
 7832    let fake_server = fake_servers.next().await.unwrap();
 7833
 7834    {
 7835        fake_server.set_request_handler::<lsp::request::Formatting, _, _>(
 7836            move |params, _| async move {
 7837                assert_eq!(
 7838                    params.text_document.uri,
 7839                    lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 7840                );
 7841                assert_eq!(params.options.tab_size, 4);
 7842                Ok(Some(vec![lsp::TextEdit::new(
 7843                    lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 7844                    ", ".to_string(),
 7845                )]))
 7846            },
 7847        );
 7848        let save = editor
 7849            .update_in(cx, |editor, window, cx| {
 7850                editor.save(true, project.clone(), window, cx)
 7851            })
 7852            .unwrap();
 7853        cx.executor().start_waiting();
 7854        save.await;
 7855
 7856        assert_eq!(
 7857            editor.update(cx, |editor, cx| editor.text(cx)),
 7858            "one, two\nthree\n"
 7859        );
 7860        assert!(!cx.read(|cx| editor.is_dirty(cx)));
 7861    }
 7862
 7863    {
 7864        editor.update_in(cx, |editor, window, cx| {
 7865            editor.set_text("one\ntwo\nthree\n", window, cx)
 7866        });
 7867        assert!(cx.read(|cx| editor.is_dirty(cx)));
 7868
 7869        // Ensure we can still save even if formatting hangs.
 7870        fake_server.set_request_handler::<lsp::request::Formatting, _, _>(
 7871            move |params, _| async move {
 7872                assert_eq!(
 7873                    params.text_document.uri,
 7874                    lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 7875                );
 7876                futures::future::pending::<()>().await;
 7877                unreachable!()
 7878            },
 7879        );
 7880        let save = editor
 7881            .update_in(cx, |editor, window, cx| {
 7882                editor.save(true, project.clone(), window, cx)
 7883            })
 7884            .unwrap();
 7885        cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 7886        cx.executor().start_waiting();
 7887        save.await;
 7888        assert_eq!(
 7889            editor.update(cx, |editor, cx| editor.text(cx)),
 7890            "one\ntwo\nthree\n"
 7891        );
 7892    }
 7893
 7894    // For non-dirty buffer, no formatting request should be sent
 7895    {
 7896        assert!(!cx.read(|cx| editor.is_dirty(cx)));
 7897
 7898        fake_server.set_request_handler::<lsp::request::Formatting, _, _>(move |_, _| async move {
 7899            panic!("Should not be invoked on non-dirty buffer");
 7900        });
 7901        let save = editor
 7902            .update_in(cx, |editor, window, cx| {
 7903                editor.save(true, project.clone(), window, cx)
 7904            })
 7905            .unwrap();
 7906        cx.executor().start_waiting();
 7907        save.await;
 7908    }
 7909
 7910    // Set rust language override and assert overridden tabsize is sent to language server
 7911    update_test_language_settings(cx, |settings| {
 7912        settings.languages.insert(
 7913            "Rust".into(),
 7914            LanguageSettingsContent {
 7915                tab_size: NonZeroU32::new(8),
 7916                ..Default::default()
 7917            },
 7918        );
 7919    });
 7920
 7921    {
 7922        editor.update_in(cx, |editor, window, cx| {
 7923            editor.set_text("somehting_new\n", window, cx)
 7924        });
 7925        assert!(cx.read(|cx| editor.is_dirty(cx)));
 7926        let _formatting_request_signal = fake_server
 7927            .set_request_handler::<lsp::request::Formatting, _, _>(move |params, _| async move {
 7928                assert_eq!(
 7929                    params.text_document.uri,
 7930                    lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 7931                );
 7932                assert_eq!(params.options.tab_size, 8);
 7933                Ok(Some(vec![]))
 7934            });
 7935        let save = editor
 7936            .update_in(cx, |editor, window, cx| {
 7937                editor.save(true, project.clone(), window, cx)
 7938            })
 7939            .unwrap();
 7940        cx.executor().start_waiting();
 7941        save.await;
 7942    }
 7943}
 7944
 7945#[gpui::test]
 7946async fn test_multibuffer_format_during_save(cx: &mut TestAppContext) {
 7947    init_test(cx, |_| {});
 7948
 7949    let cols = 4;
 7950    let rows = 10;
 7951    let sample_text_1 = sample_text(rows, cols, 'a');
 7952    assert_eq!(
 7953        sample_text_1,
 7954        "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj"
 7955    );
 7956    let sample_text_2 = sample_text(rows, cols, 'l');
 7957    assert_eq!(
 7958        sample_text_2,
 7959        "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu"
 7960    );
 7961    let sample_text_3 = sample_text(rows, cols, 'v');
 7962    assert_eq!(
 7963        sample_text_3,
 7964        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}"
 7965    );
 7966
 7967    let fs = FakeFs::new(cx.executor());
 7968    fs.insert_tree(
 7969        path!("/a"),
 7970        json!({
 7971            "main.rs": sample_text_1,
 7972            "other.rs": sample_text_2,
 7973            "lib.rs": sample_text_3,
 7974        }),
 7975    )
 7976    .await;
 7977
 7978    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
 7979    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
 7980    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
 7981
 7982    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 7983    language_registry.add(rust_lang());
 7984    let mut fake_servers = language_registry.register_fake_lsp(
 7985        "Rust",
 7986        FakeLspAdapter {
 7987            capabilities: lsp::ServerCapabilities {
 7988                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 7989                ..Default::default()
 7990            },
 7991            ..Default::default()
 7992        },
 7993    );
 7994
 7995    let worktree = project.update(cx, |project, cx| {
 7996        let mut worktrees = project.worktrees(cx).collect::<Vec<_>>();
 7997        assert_eq!(worktrees.len(), 1);
 7998        worktrees.pop().unwrap()
 7999    });
 8000    let worktree_id = worktree.update(cx, |worktree, _| worktree.id());
 8001
 8002    let buffer_1 = project
 8003        .update(cx, |project, cx| {
 8004            project.open_buffer((worktree_id, "main.rs"), cx)
 8005        })
 8006        .await
 8007        .unwrap();
 8008    let buffer_2 = project
 8009        .update(cx, |project, cx| {
 8010            project.open_buffer((worktree_id, "other.rs"), cx)
 8011        })
 8012        .await
 8013        .unwrap();
 8014    let buffer_3 = project
 8015        .update(cx, |project, cx| {
 8016            project.open_buffer((worktree_id, "lib.rs"), cx)
 8017        })
 8018        .await
 8019        .unwrap();
 8020
 8021    let multi_buffer = cx.new(|cx| {
 8022        let mut multi_buffer = MultiBuffer::new(ReadWrite);
 8023        multi_buffer.push_excerpts(
 8024            buffer_1.clone(),
 8025            [
 8026                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
 8027                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
 8028                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
 8029            ],
 8030            cx,
 8031        );
 8032        multi_buffer.push_excerpts(
 8033            buffer_2.clone(),
 8034            [
 8035                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
 8036                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
 8037                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
 8038            ],
 8039            cx,
 8040        );
 8041        multi_buffer.push_excerpts(
 8042            buffer_3.clone(),
 8043            [
 8044                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
 8045                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
 8046                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
 8047            ],
 8048            cx,
 8049        );
 8050        multi_buffer
 8051    });
 8052    let multi_buffer_editor = cx.new_window_entity(|window, cx| {
 8053        Editor::new(
 8054            EditorMode::full(),
 8055            multi_buffer,
 8056            Some(project.clone()),
 8057            window,
 8058            cx,
 8059        )
 8060    });
 8061
 8062    multi_buffer_editor.update_in(cx, |editor, window, cx| {
 8063        editor.change_selections(Some(Autoscroll::Next), window, cx, |s| {
 8064            s.select_ranges(Some(1..2))
 8065        });
 8066        editor.insert("|one|two|three|", window, cx);
 8067    });
 8068    assert!(cx.read(|cx| multi_buffer_editor.is_dirty(cx)));
 8069    multi_buffer_editor.update_in(cx, |editor, window, cx| {
 8070        editor.change_selections(Some(Autoscroll::Next), window, cx, |s| {
 8071            s.select_ranges(Some(60..70))
 8072        });
 8073        editor.insert("|four|five|six|", window, cx);
 8074    });
 8075    assert!(cx.read(|cx| multi_buffer_editor.is_dirty(cx)));
 8076
 8077    // First two buffers should be edited, but not the third one.
 8078    assert_eq!(
 8079        multi_buffer_editor.update(cx, |editor, cx| editor.text(cx)),
 8080        "a|one|two|three|aa\nbbbb\ncccc\n\nffff\ngggg\n\njjjj\nllll\nmmmm\nnnnn|four|five|six|\nr\n\nuuuu\nvvvv\nwwww\nxxxx\n\n{{{{\n||||\n\n\u{7f}\u{7f}\u{7f}\u{7f}",
 8081    );
 8082    buffer_1.update(cx, |buffer, _| {
 8083        assert!(buffer.is_dirty());
 8084        assert_eq!(
 8085            buffer.text(),
 8086            "a|one|two|three|aa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj",
 8087        )
 8088    });
 8089    buffer_2.update(cx, |buffer, _| {
 8090        assert!(buffer.is_dirty());
 8091        assert_eq!(
 8092            buffer.text(),
 8093            "llll\nmmmm\nnnnn|four|five|six|oooo\npppp\nr\nssss\ntttt\nuuuu",
 8094        )
 8095    });
 8096    buffer_3.update(cx, |buffer, _| {
 8097        assert!(!buffer.is_dirty());
 8098        assert_eq!(buffer.text(), sample_text_3,)
 8099    });
 8100    cx.executor().run_until_parked();
 8101
 8102    cx.executor().start_waiting();
 8103    let save = multi_buffer_editor
 8104        .update_in(cx, |editor, window, cx| {
 8105            editor.save(true, project.clone(), window, cx)
 8106        })
 8107        .unwrap();
 8108
 8109    let fake_server = fake_servers.next().await.unwrap();
 8110    fake_server
 8111        .server
 8112        .on_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 8113            Ok(Some(vec![lsp::TextEdit::new(
 8114                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 8115                format!("[{} formatted]", params.text_document.uri),
 8116            )]))
 8117        })
 8118        .detach();
 8119    save.await;
 8120
 8121    // After multibuffer saving, only first two buffers should be reformatted, but not the third one (as it was not dirty).
 8122    assert!(cx.read(|cx| !multi_buffer_editor.is_dirty(cx)));
 8123    assert_eq!(
 8124        multi_buffer_editor.update(cx, |editor, cx| editor.text(cx)),
 8125        uri!(
 8126            "a|o[file:///a/main.rs formatted]bbbb\ncccc\n\nffff\ngggg\n\njjjj\n\nlll[file:///a/other.rs formatted]mmmm\nnnnn|four|five|six|\nr\n\nuuuu\n\nvvvv\nwwww\nxxxx\n\n{{{{\n||||\n\n\u{7f}\u{7f}\u{7f}\u{7f}"
 8127        ),
 8128    );
 8129    buffer_1.update(cx, |buffer, _| {
 8130        assert!(!buffer.is_dirty());
 8131        assert_eq!(
 8132            buffer.text(),
 8133            uri!("a|o[file:///a/main.rs formatted]bbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj\n"),
 8134        )
 8135    });
 8136    buffer_2.update(cx, |buffer, _| {
 8137        assert!(!buffer.is_dirty());
 8138        assert_eq!(
 8139            buffer.text(),
 8140            uri!("lll[file:///a/other.rs formatted]mmmm\nnnnn|four|five|six|oooo\npppp\nr\nssss\ntttt\nuuuu\n"),
 8141        )
 8142    });
 8143    buffer_3.update(cx, |buffer, _| {
 8144        assert!(!buffer.is_dirty());
 8145        assert_eq!(buffer.text(), sample_text_3,)
 8146    });
 8147}
 8148
 8149#[gpui::test]
 8150async fn test_range_format_during_save(cx: &mut TestAppContext) {
 8151    init_test(cx, |_| {});
 8152
 8153    let fs = FakeFs::new(cx.executor());
 8154    fs.insert_file(path!("/file.rs"), Default::default()).await;
 8155
 8156    let project = Project::test(fs, [path!("/").as_ref()], cx).await;
 8157
 8158    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 8159    language_registry.add(rust_lang());
 8160    let mut fake_servers = language_registry.register_fake_lsp(
 8161        "Rust",
 8162        FakeLspAdapter {
 8163            capabilities: lsp::ServerCapabilities {
 8164                document_range_formatting_provider: Some(lsp::OneOf::Left(true)),
 8165                ..Default::default()
 8166            },
 8167            ..Default::default()
 8168        },
 8169    );
 8170
 8171    let buffer = project
 8172        .update(cx, |project, cx| {
 8173            project.open_local_buffer(path!("/file.rs"), cx)
 8174        })
 8175        .await
 8176        .unwrap();
 8177
 8178    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 8179    let (editor, cx) = cx.add_window_view(|window, cx| {
 8180        build_editor_with_project(project.clone(), buffer, window, cx)
 8181    });
 8182    editor.update_in(cx, |editor, window, cx| {
 8183        editor.set_text("one\ntwo\nthree\n", window, cx)
 8184    });
 8185    assert!(cx.read(|cx| editor.is_dirty(cx)));
 8186
 8187    cx.executor().start_waiting();
 8188    let fake_server = fake_servers.next().await.unwrap();
 8189
 8190    let save = editor
 8191        .update_in(cx, |editor, window, cx| {
 8192            editor.save(true, project.clone(), window, cx)
 8193        })
 8194        .unwrap();
 8195    fake_server
 8196        .set_request_handler::<lsp::request::RangeFormatting, _, _>(move |params, _| async move {
 8197            assert_eq!(
 8198                params.text_document.uri,
 8199                lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 8200            );
 8201            assert_eq!(params.options.tab_size, 4);
 8202            Ok(Some(vec![lsp::TextEdit::new(
 8203                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 8204                ", ".to_string(),
 8205            )]))
 8206        })
 8207        .next()
 8208        .await;
 8209    cx.executor().start_waiting();
 8210    save.await;
 8211    assert_eq!(
 8212        editor.update(cx, |editor, cx| editor.text(cx)),
 8213        "one, two\nthree\n"
 8214    );
 8215    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 8216
 8217    editor.update_in(cx, |editor, window, cx| {
 8218        editor.set_text("one\ntwo\nthree\n", window, cx)
 8219    });
 8220    assert!(cx.read(|cx| editor.is_dirty(cx)));
 8221
 8222    // Ensure we can still save even if formatting hangs.
 8223    fake_server.set_request_handler::<lsp::request::RangeFormatting, _, _>(
 8224        move |params, _| async move {
 8225            assert_eq!(
 8226                params.text_document.uri,
 8227                lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 8228            );
 8229            futures::future::pending::<()>().await;
 8230            unreachable!()
 8231        },
 8232    );
 8233    let save = editor
 8234        .update_in(cx, |editor, window, cx| {
 8235            editor.save(true, project.clone(), window, cx)
 8236        })
 8237        .unwrap();
 8238    cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 8239    cx.executor().start_waiting();
 8240    save.await;
 8241    assert_eq!(
 8242        editor.update(cx, |editor, cx| editor.text(cx)),
 8243        "one\ntwo\nthree\n"
 8244    );
 8245    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 8246
 8247    // For non-dirty buffer, no formatting request should be sent
 8248    let save = editor
 8249        .update_in(cx, |editor, window, cx| {
 8250            editor.save(true, project.clone(), window, cx)
 8251        })
 8252        .unwrap();
 8253    let _pending_format_request = fake_server
 8254        .set_request_handler::<lsp::request::RangeFormatting, _, _>(move |_, _| async move {
 8255            panic!("Should not be invoked on non-dirty buffer");
 8256        })
 8257        .next();
 8258    cx.executor().start_waiting();
 8259    save.await;
 8260
 8261    // Set Rust language override and assert overridden tabsize is sent to language server
 8262    update_test_language_settings(cx, |settings| {
 8263        settings.languages.insert(
 8264            "Rust".into(),
 8265            LanguageSettingsContent {
 8266                tab_size: NonZeroU32::new(8),
 8267                ..Default::default()
 8268            },
 8269        );
 8270    });
 8271
 8272    editor.update_in(cx, |editor, window, cx| {
 8273        editor.set_text("somehting_new\n", window, cx)
 8274    });
 8275    assert!(cx.read(|cx| editor.is_dirty(cx)));
 8276    let save = editor
 8277        .update_in(cx, |editor, window, cx| {
 8278            editor.save(true, project.clone(), window, cx)
 8279        })
 8280        .unwrap();
 8281    fake_server
 8282        .set_request_handler::<lsp::request::RangeFormatting, _, _>(move |params, _| async move {
 8283            assert_eq!(
 8284                params.text_document.uri,
 8285                lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 8286            );
 8287            assert_eq!(params.options.tab_size, 8);
 8288            Ok(Some(vec![]))
 8289        })
 8290        .next()
 8291        .await;
 8292    cx.executor().start_waiting();
 8293    save.await;
 8294}
 8295
 8296#[gpui::test]
 8297async fn test_document_format_manual_trigger(cx: &mut TestAppContext) {
 8298    init_test(cx, |settings| {
 8299        settings.defaults.formatter = Some(language_settings::SelectedFormatter::List(
 8300            FormatterList(vec![Formatter::LanguageServer { name: None }].into()),
 8301        ))
 8302    });
 8303
 8304    let fs = FakeFs::new(cx.executor());
 8305    fs.insert_file(path!("/file.rs"), Default::default()).await;
 8306
 8307    let project = Project::test(fs, [path!("/").as_ref()], cx).await;
 8308
 8309    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 8310    language_registry.add(Arc::new(Language::new(
 8311        LanguageConfig {
 8312            name: "Rust".into(),
 8313            matcher: LanguageMatcher {
 8314                path_suffixes: vec!["rs".to_string()],
 8315                ..Default::default()
 8316            },
 8317            ..LanguageConfig::default()
 8318        },
 8319        Some(tree_sitter_rust::LANGUAGE.into()),
 8320    )));
 8321    update_test_language_settings(cx, |settings| {
 8322        // Enable Prettier formatting for the same buffer, and ensure
 8323        // LSP is called instead of Prettier.
 8324        settings.defaults.prettier = Some(PrettierSettings {
 8325            allowed: true,
 8326            ..PrettierSettings::default()
 8327        });
 8328    });
 8329    let mut fake_servers = language_registry.register_fake_lsp(
 8330        "Rust",
 8331        FakeLspAdapter {
 8332            capabilities: lsp::ServerCapabilities {
 8333                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 8334                ..Default::default()
 8335            },
 8336            ..Default::default()
 8337        },
 8338    );
 8339
 8340    let buffer = project
 8341        .update(cx, |project, cx| {
 8342            project.open_local_buffer(path!("/file.rs"), cx)
 8343        })
 8344        .await
 8345        .unwrap();
 8346
 8347    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 8348    let (editor, cx) = cx.add_window_view(|window, cx| {
 8349        build_editor_with_project(project.clone(), buffer, window, cx)
 8350    });
 8351    editor.update_in(cx, |editor, window, cx| {
 8352        editor.set_text("one\ntwo\nthree\n", window, cx)
 8353    });
 8354
 8355    cx.executor().start_waiting();
 8356    let fake_server = fake_servers.next().await.unwrap();
 8357
 8358    let format = editor
 8359        .update_in(cx, |editor, window, cx| {
 8360            editor.perform_format(
 8361                project.clone(),
 8362                FormatTrigger::Manual,
 8363                FormatTarget::Buffers,
 8364                window,
 8365                cx,
 8366            )
 8367        })
 8368        .unwrap();
 8369    fake_server
 8370        .set_request_handler::<lsp::request::Formatting, _, _>(move |params, _| async move {
 8371            assert_eq!(
 8372                params.text_document.uri,
 8373                lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 8374            );
 8375            assert_eq!(params.options.tab_size, 4);
 8376            Ok(Some(vec![lsp::TextEdit::new(
 8377                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 8378                ", ".to_string(),
 8379            )]))
 8380        })
 8381        .next()
 8382        .await;
 8383    cx.executor().start_waiting();
 8384    format.await;
 8385    assert_eq!(
 8386        editor.update(cx, |editor, cx| editor.text(cx)),
 8387        "one, two\nthree\n"
 8388    );
 8389
 8390    editor.update_in(cx, |editor, window, cx| {
 8391        editor.set_text("one\ntwo\nthree\n", window, cx)
 8392    });
 8393    // Ensure we don't lock if formatting hangs.
 8394    fake_server.set_request_handler::<lsp::request::Formatting, _, _>(
 8395        move |params, _| async move {
 8396            assert_eq!(
 8397                params.text_document.uri,
 8398                lsp::Url::from_file_path(path!("/file.rs")).unwrap()
 8399            );
 8400            futures::future::pending::<()>().await;
 8401            unreachable!()
 8402        },
 8403    );
 8404    let format = editor
 8405        .update_in(cx, |editor, window, cx| {
 8406            editor.perform_format(
 8407                project,
 8408                FormatTrigger::Manual,
 8409                FormatTarget::Buffers,
 8410                window,
 8411                cx,
 8412            )
 8413        })
 8414        .unwrap();
 8415    cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 8416    cx.executor().start_waiting();
 8417    format.await;
 8418    assert_eq!(
 8419        editor.update(cx, |editor, cx| editor.text(cx)),
 8420        "one\ntwo\nthree\n"
 8421    );
 8422}
 8423
 8424#[gpui::test]
 8425async fn test_multiple_formatters(cx: &mut TestAppContext) {
 8426    init_test(cx, |settings| {
 8427        settings.defaults.remove_trailing_whitespace_on_save = Some(true);
 8428        settings.defaults.formatter =
 8429            Some(language_settings::SelectedFormatter::List(FormatterList(
 8430                vec![
 8431                    Formatter::LanguageServer { name: None },
 8432                    Formatter::CodeActions(
 8433                        [
 8434                            ("code-action-1".into(), true),
 8435                            ("code-action-2".into(), true),
 8436                        ]
 8437                        .into_iter()
 8438                        .collect(),
 8439                    ),
 8440                ]
 8441                .into(),
 8442            )))
 8443    });
 8444
 8445    let fs = FakeFs::new(cx.executor());
 8446    fs.insert_file(path!("/file.rs"), "one  \ntwo   \nthree".into())
 8447        .await;
 8448
 8449    let project = Project::test(fs, [path!("/").as_ref()], cx).await;
 8450    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 8451    language_registry.add(rust_lang());
 8452
 8453    let mut fake_servers = language_registry.register_fake_lsp(
 8454        "Rust",
 8455        FakeLspAdapter {
 8456            capabilities: lsp::ServerCapabilities {
 8457                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 8458                execute_command_provider: Some(lsp::ExecuteCommandOptions {
 8459                    commands: vec!["the-command-for-code-action-1".into()],
 8460                    ..Default::default()
 8461                }),
 8462                code_action_provider: Some(lsp::CodeActionProviderCapability::Simple(true)),
 8463                ..Default::default()
 8464            },
 8465            ..Default::default()
 8466        },
 8467    );
 8468
 8469    let buffer = project
 8470        .update(cx, |project, cx| {
 8471            project.open_local_buffer(path!("/file.rs"), cx)
 8472        })
 8473        .await
 8474        .unwrap();
 8475
 8476    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 8477    let (editor, cx) = cx.add_window_view(|window, cx| {
 8478        build_editor_with_project(project.clone(), buffer, window, cx)
 8479    });
 8480
 8481    cx.executor().start_waiting();
 8482
 8483    let fake_server = fake_servers.next().await.unwrap();
 8484    fake_server.set_request_handler::<lsp::request::Formatting, _, _>(
 8485        move |_params, _| async move {
 8486            Ok(Some(vec![lsp::TextEdit::new(
 8487                lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
 8488                "applied-formatting\n".to_string(),
 8489            )]))
 8490        },
 8491    );
 8492    fake_server.set_request_handler::<lsp::request::CodeActionRequest, _, _>(
 8493        move |params, _| async move {
 8494            assert_eq!(
 8495                params.context.only,
 8496                Some(vec!["code-action-1".into(), "code-action-2".into()])
 8497            );
 8498            let uri = lsp::Url::from_file_path(path!("/file.rs")).unwrap();
 8499            Ok(Some(vec![
 8500                lsp::CodeActionOrCommand::CodeAction(lsp::CodeAction {
 8501                    kind: Some("code-action-1".into()),
 8502                    edit: Some(lsp::WorkspaceEdit::new(
 8503                        [(
 8504                            uri.clone(),
 8505                            vec![lsp::TextEdit::new(
 8506                                lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
 8507                                "applied-code-action-1-edit\n".to_string(),
 8508                            )],
 8509                        )]
 8510                        .into_iter()
 8511                        .collect(),
 8512                    )),
 8513                    command: Some(lsp::Command {
 8514                        command: "the-command-for-code-action-1".into(),
 8515                        ..Default::default()
 8516                    }),
 8517                    ..Default::default()
 8518                }),
 8519                lsp::CodeActionOrCommand::CodeAction(lsp::CodeAction {
 8520                    kind: Some("code-action-2".into()),
 8521                    edit: Some(lsp::WorkspaceEdit::new(
 8522                        [(
 8523                            uri.clone(),
 8524                            vec![lsp::TextEdit::new(
 8525                                lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
 8526                                "applied-code-action-2-edit\n".to_string(),
 8527                            )],
 8528                        )]
 8529                        .into_iter()
 8530                        .collect(),
 8531                    )),
 8532                    ..Default::default()
 8533                }),
 8534            ]))
 8535        },
 8536    );
 8537
 8538    fake_server.set_request_handler::<lsp::request::CodeActionResolveRequest, _, _>({
 8539        move |params, _| async move { Ok(params) }
 8540    });
 8541
 8542    let command_lock = Arc::new(futures::lock::Mutex::new(()));
 8543    fake_server.set_request_handler::<lsp::request::ExecuteCommand, _, _>({
 8544        let fake = fake_server.clone();
 8545        let lock = command_lock.clone();
 8546        move |params, _| {
 8547            assert_eq!(params.command, "the-command-for-code-action-1");
 8548            let fake = fake.clone();
 8549            let lock = lock.clone();
 8550            async move {
 8551                lock.lock().await;
 8552                fake.server
 8553                    .request::<lsp::request::ApplyWorkspaceEdit>(lsp::ApplyWorkspaceEditParams {
 8554                        label: None,
 8555                        edit: lsp::WorkspaceEdit {
 8556                            changes: Some(
 8557                                [(
 8558                                    lsp::Url::from_file_path(path!("/file.rs")).unwrap(),
 8559                                    vec![lsp::TextEdit {
 8560                                        range: lsp::Range::new(
 8561                                            lsp::Position::new(0, 0),
 8562                                            lsp::Position::new(0, 0),
 8563                                        ),
 8564                                        new_text: "applied-code-action-1-command\n".into(),
 8565                                    }],
 8566                                )]
 8567                                .into_iter()
 8568                                .collect(),
 8569                            ),
 8570                            ..Default::default()
 8571                        },
 8572                    })
 8573                    .await
 8574                    .unwrap();
 8575                Ok(Some(json!(null)))
 8576            }
 8577        }
 8578    });
 8579
 8580    cx.executor().start_waiting();
 8581    editor
 8582        .update_in(cx, |editor, window, cx| {
 8583            editor.perform_format(
 8584                project.clone(),
 8585                FormatTrigger::Manual,
 8586                FormatTarget::Buffers,
 8587                window,
 8588                cx,
 8589            )
 8590        })
 8591        .unwrap()
 8592        .await;
 8593    editor.update(cx, |editor, cx| {
 8594        assert_eq!(
 8595            editor.text(cx),
 8596            r#"
 8597                applied-code-action-2-edit
 8598                applied-code-action-1-command
 8599                applied-code-action-1-edit
 8600                applied-formatting
 8601                one
 8602                two
 8603                three
 8604            "#
 8605            .unindent()
 8606        );
 8607    });
 8608
 8609    editor.update_in(cx, |editor, window, cx| {
 8610        editor.undo(&Default::default(), window, cx);
 8611        assert_eq!(editor.text(cx), "one  \ntwo   \nthree");
 8612    });
 8613
 8614    // Perform a manual edit while waiting for an LSP command
 8615    // that's being run as part of a formatting code action.
 8616    let lock_guard = command_lock.lock().await;
 8617    let format = editor
 8618        .update_in(cx, |editor, window, cx| {
 8619            editor.perform_format(
 8620                project.clone(),
 8621                FormatTrigger::Manual,
 8622                FormatTarget::Buffers,
 8623                window,
 8624                cx,
 8625            )
 8626        })
 8627        .unwrap();
 8628    cx.run_until_parked();
 8629    editor.update(cx, |editor, cx| {
 8630        assert_eq!(
 8631            editor.text(cx),
 8632            r#"
 8633                applied-code-action-1-edit
 8634                applied-formatting
 8635                one
 8636                two
 8637                three
 8638            "#
 8639            .unindent()
 8640        );
 8641
 8642        editor.buffer.update(cx, |buffer, cx| {
 8643            let ix = buffer.len(cx);
 8644            buffer.edit([(ix..ix, "edited\n")], None, cx);
 8645        });
 8646    });
 8647
 8648    // Allow the LSP command to proceed. Because the buffer was edited,
 8649    // the second code action will not be run.
 8650    drop(lock_guard);
 8651    format.await;
 8652    editor.update_in(cx, |editor, window, cx| {
 8653        assert_eq!(
 8654            editor.text(cx),
 8655            r#"
 8656                applied-code-action-1-command
 8657                applied-code-action-1-edit
 8658                applied-formatting
 8659                one
 8660                two
 8661                three
 8662                edited
 8663            "#
 8664            .unindent()
 8665        );
 8666
 8667        // The manual edit is undone first, because it is the last thing the user did
 8668        // (even though the command completed afterwards).
 8669        editor.undo(&Default::default(), window, cx);
 8670        assert_eq!(
 8671            editor.text(cx),
 8672            r#"
 8673                applied-code-action-1-command
 8674                applied-code-action-1-edit
 8675                applied-formatting
 8676                one
 8677                two
 8678                three
 8679            "#
 8680            .unindent()
 8681        );
 8682
 8683        // All the formatting (including the command, which completed after the manual edit)
 8684        // is undone together.
 8685        editor.undo(&Default::default(), window, cx);
 8686        assert_eq!(editor.text(cx), "one  \ntwo   \nthree");
 8687    });
 8688}
 8689
 8690#[gpui::test]
 8691async fn test_organize_imports_manual_trigger(cx: &mut TestAppContext) {
 8692    init_test(cx, |settings| {
 8693        settings.defaults.formatter = Some(language_settings::SelectedFormatter::List(
 8694            FormatterList(vec![Formatter::LanguageServer { name: None }].into()),
 8695        ))
 8696    });
 8697
 8698    let fs = FakeFs::new(cx.executor());
 8699    fs.insert_file(path!("/file.ts"), Default::default()).await;
 8700
 8701    let project = Project::test(fs, [path!("/").as_ref()], cx).await;
 8702
 8703    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 8704    language_registry.add(Arc::new(Language::new(
 8705        LanguageConfig {
 8706            name: "TypeScript".into(),
 8707            matcher: LanguageMatcher {
 8708                path_suffixes: vec!["ts".to_string()],
 8709                ..Default::default()
 8710            },
 8711            ..LanguageConfig::default()
 8712        },
 8713        Some(tree_sitter_typescript::LANGUAGE_TYPESCRIPT.into()),
 8714    )));
 8715    update_test_language_settings(cx, |settings| {
 8716        settings.defaults.prettier = Some(PrettierSettings {
 8717            allowed: true,
 8718            ..PrettierSettings::default()
 8719        });
 8720    });
 8721    let mut fake_servers = language_registry.register_fake_lsp(
 8722        "TypeScript",
 8723        FakeLspAdapter {
 8724            capabilities: lsp::ServerCapabilities {
 8725                code_action_provider: Some(lsp::CodeActionProviderCapability::Simple(true)),
 8726                ..Default::default()
 8727            },
 8728            ..Default::default()
 8729        },
 8730    );
 8731
 8732    let buffer = project
 8733        .update(cx, |project, cx| {
 8734            project.open_local_buffer(path!("/file.ts"), cx)
 8735        })
 8736        .await
 8737        .unwrap();
 8738
 8739    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
 8740    let (editor, cx) = cx.add_window_view(|window, cx| {
 8741        build_editor_with_project(project.clone(), buffer, window, cx)
 8742    });
 8743    editor.update_in(cx, |editor, window, cx| {
 8744        editor.set_text(
 8745            "import { a } from 'module';\nimport { b } from 'module';\n\nconst x = a;\n",
 8746            window,
 8747            cx,
 8748        )
 8749    });
 8750
 8751    cx.executor().start_waiting();
 8752    let fake_server = fake_servers.next().await.unwrap();
 8753
 8754    let format = editor
 8755        .update_in(cx, |editor, window, cx| {
 8756            editor.perform_code_action_kind(
 8757                project.clone(),
 8758                CodeActionKind::SOURCE_ORGANIZE_IMPORTS,
 8759                window,
 8760                cx,
 8761            )
 8762        })
 8763        .unwrap();
 8764    fake_server
 8765        .set_request_handler::<lsp::request::CodeActionRequest, _, _>(move |params, _| async move {
 8766            assert_eq!(
 8767                params.text_document.uri,
 8768                lsp::Url::from_file_path(path!("/file.ts")).unwrap()
 8769            );
 8770            Ok(Some(vec![lsp::CodeActionOrCommand::CodeAction(
 8771                lsp::CodeAction {
 8772                    title: "Organize Imports".to_string(),
 8773                    kind: Some(lsp::CodeActionKind::SOURCE_ORGANIZE_IMPORTS),
 8774                    edit: Some(lsp::WorkspaceEdit {
 8775                        changes: Some(
 8776                            [(
 8777                                params.text_document.uri.clone(),
 8778                                vec![lsp::TextEdit::new(
 8779                                    lsp::Range::new(
 8780                                        lsp::Position::new(1, 0),
 8781                                        lsp::Position::new(2, 0),
 8782                                    ),
 8783                                    "".to_string(),
 8784                                )],
 8785                            )]
 8786                            .into_iter()
 8787                            .collect(),
 8788                        ),
 8789                        ..Default::default()
 8790                    }),
 8791                    ..Default::default()
 8792                },
 8793            )]))
 8794        })
 8795        .next()
 8796        .await;
 8797    cx.executor().start_waiting();
 8798    format.await;
 8799    assert_eq!(
 8800        editor.update(cx, |editor, cx| editor.text(cx)),
 8801        "import { a } from 'module';\n\nconst x = a;\n"
 8802    );
 8803
 8804    editor.update_in(cx, |editor, window, cx| {
 8805        editor.set_text(
 8806            "import { a } from 'module';\nimport { b } from 'module';\n\nconst x = a;\n",
 8807            window,
 8808            cx,
 8809        )
 8810    });
 8811    // Ensure we don't lock if code action hangs.
 8812    fake_server.set_request_handler::<lsp::request::CodeActionRequest, _, _>(
 8813        move |params, _| async move {
 8814            assert_eq!(
 8815                params.text_document.uri,
 8816                lsp::Url::from_file_path(path!("/file.ts")).unwrap()
 8817            );
 8818            futures::future::pending::<()>().await;
 8819            unreachable!()
 8820        },
 8821    );
 8822    let format = editor
 8823        .update_in(cx, |editor, window, cx| {
 8824            editor.perform_code_action_kind(
 8825                project,
 8826                CodeActionKind::SOURCE_ORGANIZE_IMPORTS,
 8827                window,
 8828                cx,
 8829            )
 8830        })
 8831        .unwrap();
 8832    cx.executor().advance_clock(super::CODE_ACTION_TIMEOUT);
 8833    cx.executor().start_waiting();
 8834    format.await;
 8835    assert_eq!(
 8836        editor.update(cx, |editor, cx| editor.text(cx)),
 8837        "import { a } from 'module';\nimport { b } from 'module';\n\nconst x = a;\n"
 8838    );
 8839}
 8840
 8841#[gpui::test]
 8842async fn test_concurrent_format_requests(cx: &mut TestAppContext) {
 8843    init_test(cx, |_| {});
 8844
 8845    let mut cx = EditorLspTestContext::new_rust(
 8846        lsp::ServerCapabilities {
 8847            document_formatting_provider: Some(lsp::OneOf::Left(true)),
 8848            ..Default::default()
 8849        },
 8850        cx,
 8851    )
 8852    .await;
 8853
 8854    cx.set_state(indoc! {"
 8855        one.twoˇ
 8856    "});
 8857
 8858    // The format request takes a long time. When it completes, it inserts
 8859    // a newline and an indent before the `.`
 8860    cx.lsp
 8861        .set_request_handler::<lsp::request::Formatting, _, _>(move |_, cx| {
 8862            let executor = cx.background_executor().clone();
 8863            async move {
 8864                executor.timer(Duration::from_millis(100)).await;
 8865                Ok(Some(vec![lsp::TextEdit {
 8866                    range: lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(0, 3)),
 8867                    new_text: "\n    ".into(),
 8868                }]))
 8869            }
 8870        });
 8871
 8872    // Submit a format request.
 8873    let format_1 = cx
 8874        .update_editor(|editor, window, cx| editor.format(&Format, window, cx))
 8875        .unwrap();
 8876    cx.executor().run_until_parked();
 8877
 8878    // Submit a second format request.
 8879    let format_2 = cx
 8880        .update_editor(|editor, window, cx| editor.format(&Format, window, cx))
 8881        .unwrap();
 8882    cx.executor().run_until_parked();
 8883
 8884    // Wait for both format requests to complete
 8885    cx.executor().advance_clock(Duration::from_millis(200));
 8886    cx.executor().start_waiting();
 8887    format_1.await.unwrap();
 8888    cx.executor().start_waiting();
 8889    format_2.await.unwrap();
 8890
 8891    // The formatting edits only happens once.
 8892    cx.assert_editor_state(indoc! {"
 8893        one
 8894            .twoˇ
 8895    "});
 8896}
 8897
 8898#[gpui::test]
 8899async fn test_strip_whitespace_and_format_via_lsp(cx: &mut TestAppContext) {
 8900    init_test(cx, |settings| {
 8901        settings.defaults.formatter = Some(language_settings::SelectedFormatter::Auto)
 8902    });
 8903
 8904    let mut cx = EditorLspTestContext::new_rust(
 8905        lsp::ServerCapabilities {
 8906            document_formatting_provider: Some(lsp::OneOf::Left(true)),
 8907            ..Default::default()
 8908        },
 8909        cx,
 8910    )
 8911    .await;
 8912
 8913    // Set up a buffer white some trailing whitespace and no trailing newline.
 8914    cx.set_state(
 8915        &[
 8916            "one ",   //
 8917            "twoˇ",   //
 8918            "three ", //
 8919            "four",   //
 8920        ]
 8921        .join("\n"),
 8922    );
 8923
 8924    // Submit a format request.
 8925    let format = cx
 8926        .update_editor(|editor, window, cx| editor.format(&Format, window, cx))
 8927        .unwrap();
 8928
 8929    // Record which buffer changes have been sent to the language server
 8930    let buffer_changes = Arc::new(Mutex::new(Vec::new()));
 8931    cx.lsp
 8932        .handle_notification::<lsp::notification::DidChangeTextDocument, _>({
 8933            let buffer_changes = buffer_changes.clone();
 8934            move |params, _| {
 8935                buffer_changes.lock().extend(
 8936                    params
 8937                        .content_changes
 8938                        .into_iter()
 8939                        .map(|e| (e.range.unwrap(), e.text)),
 8940                );
 8941            }
 8942        });
 8943
 8944    // Handle formatting requests to the language server.
 8945    cx.lsp
 8946        .set_request_handler::<lsp::request::Formatting, _, _>({
 8947            let buffer_changes = buffer_changes.clone();
 8948            move |_, _| {
 8949                // When formatting is requested, trailing whitespace has already been stripped,
 8950                // and the trailing newline has already been added.
 8951                assert_eq!(
 8952                    &buffer_changes.lock()[1..],
 8953                    &[
 8954                        (
 8955                            lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(0, 4)),
 8956                            "".into()
 8957                        ),
 8958                        (
 8959                            lsp::Range::new(lsp::Position::new(2, 5), lsp::Position::new(2, 6)),
 8960                            "".into()
 8961                        ),
 8962                        (
 8963                            lsp::Range::new(lsp::Position::new(3, 4), lsp::Position::new(3, 4)),
 8964                            "\n".into()
 8965                        ),
 8966                    ]
 8967                );
 8968
 8969                // Insert blank lines between each line of the buffer.
 8970                async move {
 8971                    Ok(Some(vec![
 8972                        lsp::TextEdit {
 8973                            range: lsp::Range::new(
 8974                                lsp::Position::new(1, 0),
 8975                                lsp::Position::new(1, 0),
 8976                            ),
 8977                            new_text: "\n".into(),
 8978                        },
 8979                        lsp::TextEdit {
 8980                            range: lsp::Range::new(
 8981                                lsp::Position::new(2, 0),
 8982                                lsp::Position::new(2, 0),
 8983                            ),
 8984                            new_text: "\n".into(),
 8985                        },
 8986                    ]))
 8987                }
 8988            }
 8989        });
 8990
 8991    // After formatting the buffer, the trailing whitespace is stripped,
 8992    // a newline is appended, and the edits provided by the language server
 8993    // have been applied.
 8994    format.await.unwrap();
 8995    cx.assert_editor_state(
 8996        &[
 8997            "one",   //
 8998            "",      //
 8999            "twoˇ",  //
 9000            "",      //
 9001            "three", //
 9002            "four",  //
 9003            "",      //
 9004        ]
 9005        .join("\n"),
 9006    );
 9007
 9008    // Undoing the formatting undoes the trailing whitespace removal, the
 9009    // trailing newline, and the LSP edits.
 9010    cx.update_buffer(|buffer, cx| buffer.undo(cx));
 9011    cx.assert_editor_state(
 9012        &[
 9013            "one ",   //
 9014            "twoˇ",   //
 9015            "three ", //
 9016            "four",   //
 9017        ]
 9018        .join("\n"),
 9019    );
 9020}
 9021
 9022#[gpui::test]
 9023async fn test_handle_input_for_show_signature_help_auto_signature_help_true(
 9024    cx: &mut TestAppContext,
 9025) {
 9026    init_test(cx, |_| {});
 9027
 9028    cx.update(|cx| {
 9029        cx.update_global::<SettingsStore, _>(|settings, cx| {
 9030            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 9031                settings.auto_signature_help = Some(true);
 9032            });
 9033        });
 9034    });
 9035
 9036    let mut cx = EditorLspTestContext::new_rust(
 9037        lsp::ServerCapabilities {
 9038            signature_help_provider: Some(lsp::SignatureHelpOptions {
 9039                ..Default::default()
 9040            }),
 9041            ..Default::default()
 9042        },
 9043        cx,
 9044    )
 9045    .await;
 9046
 9047    let language = Language::new(
 9048        LanguageConfig {
 9049            name: "Rust".into(),
 9050            brackets: BracketPairConfig {
 9051                pairs: vec![
 9052                    BracketPair {
 9053                        start: "{".to_string(),
 9054                        end: "}".to_string(),
 9055                        close: true,
 9056                        surround: true,
 9057                        newline: true,
 9058                    },
 9059                    BracketPair {
 9060                        start: "(".to_string(),
 9061                        end: ")".to_string(),
 9062                        close: true,
 9063                        surround: true,
 9064                        newline: true,
 9065                    },
 9066                    BracketPair {
 9067                        start: "/*".to_string(),
 9068                        end: " */".to_string(),
 9069                        close: true,
 9070                        surround: true,
 9071                        newline: true,
 9072                    },
 9073                    BracketPair {
 9074                        start: "[".to_string(),
 9075                        end: "]".to_string(),
 9076                        close: false,
 9077                        surround: false,
 9078                        newline: true,
 9079                    },
 9080                    BracketPair {
 9081                        start: "\"".to_string(),
 9082                        end: "\"".to_string(),
 9083                        close: true,
 9084                        surround: true,
 9085                        newline: false,
 9086                    },
 9087                    BracketPair {
 9088                        start: "<".to_string(),
 9089                        end: ">".to_string(),
 9090                        close: false,
 9091                        surround: true,
 9092                        newline: true,
 9093                    },
 9094                ],
 9095                ..Default::default()
 9096            },
 9097            autoclose_before: "})]".to_string(),
 9098            ..Default::default()
 9099        },
 9100        Some(tree_sitter_rust::LANGUAGE.into()),
 9101    );
 9102    let language = Arc::new(language);
 9103
 9104    cx.language_registry().add(language.clone());
 9105    cx.update_buffer(|buffer, cx| {
 9106        buffer.set_language(Some(language), cx);
 9107    });
 9108
 9109    cx.set_state(
 9110        &r#"
 9111            fn main() {
 9112                sampleˇ
 9113            }
 9114        "#
 9115        .unindent(),
 9116    );
 9117
 9118    cx.update_editor(|editor, window, cx| {
 9119        editor.handle_input("(", window, cx);
 9120    });
 9121    cx.assert_editor_state(
 9122        &"
 9123            fn main() {
 9124                sample(ˇ)
 9125            }
 9126        "
 9127        .unindent(),
 9128    );
 9129
 9130    let mocked_response = lsp::SignatureHelp {
 9131        signatures: vec![lsp::SignatureInformation {
 9132            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9133            documentation: None,
 9134            parameters: Some(vec![
 9135                lsp::ParameterInformation {
 9136                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9137                    documentation: None,
 9138                },
 9139                lsp::ParameterInformation {
 9140                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9141                    documentation: None,
 9142                },
 9143            ]),
 9144            active_parameter: None,
 9145        }],
 9146        active_signature: Some(0),
 9147        active_parameter: Some(0),
 9148    };
 9149    handle_signature_help_request(&mut cx, mocked_response).await;
 9150
 9151    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9152        .await;
 9153
 9154    cx.editor(|editor, _, _| {
 9155        let signature_help_state = editor.signature_help_state.popover().cloned();
 9156        assert_eq!(
 9157            signature_help_state.unwrap().label,
 9158            "param1: u8, param2: u8"
 9159        );
 9160    });
 9161}
 9162
 9163#[gpui::test]
 9164async fn test_handle_input_with_different_show_signature_settings(cx: &mut TestAppContext) {
 9165    init_test(cx, |_| {});
 9166
 9167    cx.update(|cx| {
 9168        cx.update_global::<SettingsStore, _>(|settings, cx| {
 9169            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 9170                settings.auto_signature_help = Some(false);
 9171                settings.show_signature_help_after_edits = Some(false);
 9172            });
 9173        });
 9174    });
 9175
 9176    let mut cx = EditorLspTestContext::new_rust(
 9177        lsp::ServerCapabilities {
 9178            signature_help_provider: Some(lsp::SignatureHelpOptions {
 9179                ..Default::default()
 9180            }),
 9181            ..Default::default()
 9182        },
 9183        cx,
 9184    )
 9185    .await;
 9186
 9187    let language = Language::new(
 9188        LanguageConfig {
 9189            name: "Rust".into(),
 9190            brackets: BracketPairConfig {
 9191                pairs: vec![
 9192                    BracketPair {
 9193                        start: "{".to_string(),
 9194                        end: "}".to_string(),
 9195                        close: true,
 9196                        surround: true,
 9197                        newline: true,
 9198                    },
 9199                    BracketPair {
 9200                        start: "(".to_string(),
 9201                        end: ")".to_string(),
 9202                        close: true,
 9203                        surround: true,
 9204                        newline: true,
 9205                    },
 9206                    BracketPair {
 9207                        start: "/*".to_string(),
 9208                        end: " */".to_string(),
 9209                        close: true,
 9210                        surround: true,
 9211                        newline: true,
 9212                    },
 9213                    BracketPair {
 9214                        start: "[".to_string(),
 9215                        end: "]".to_string(),
 9216                        close: false,
 9217                        surround: false,
 9218                        newline: true,
 9219                    },
 9220                    BracketPair {
 9221                        start: "\"".to_string(),
 9222                        end: "\"".to_string(),
 9223                        close: true,
 9224                        surround: true,
 9225                        newline: false,
 9226                    },
 9227                    BracketPair {
 9228                        start: "<".to_string(),
 9229                        end: ">".to_string(),
 9230                        close: false,
 9231                        surround: true,
 9232                        newline: true,
 9233                    },
 9234                ],
 9235                ..Default::default()
 9236            },
 9237            autoclose_before: "})]".to_string(),
 9238            ..Default::default()
 9239        },
 9240        Some(tree_sitter_rust::LANGUAGE.into()),
 9241    );
 9242    let language = Arc::new(language);
 9243
 9244    cx.language_registry().add(language.clone());
 9245    cx.update_buffer(|buffer, cx| {
 9246        buffer.set_language(Some(language), cx);
 9247    });
 9248
 9249    // Ensure that signature_help is not called when no signature help is enabled.
 9250    cx.set_state(
 9251        &r#"
 9252            fn main() {
 9253                sampleˇ
 9254            }
 9255        "#
 9256        .unindent(),
 9257    );
 9258    cx.update_editor(|editor, window, cx| {
 9259        editor.handle_input("(", window, cx);
 9260    });
 9261    cx.assert_editor_state(
 9262        &"
 9263            fn main() {
 9264                sample(ˇ)
 9265            }
 9266        "
 9267        .unindent(),
 9268    );
 9269    cx.editor(|editor, _, _| {
 9270        assert!(editor.signature_help_state.task().is_none());
 9271    });
 9272
 9273    let mocked_response = lsp::SignatureHelp {
 9274        signatures: vec![lsp::SignatureInformation {
 9275            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9276            documentation: None,
 9277            parameters: Some(vec![
 9278                lsp::ParameterInformation {
 9279                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9280                    documentation: None,
 9281                },
 9282                lsp::ParameterInformation {
 9283                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9284                    documentation: None,
 9285                },
 9286            ]),
 9287            active_parameter: None,
 9288        }],
 9289        active_signature: Some(0),
 9290        active_parameter: Some(0),
 9291    };
 9292
 9293    // Ensure that signature_help is called when enabled afte edits
 9294    cx.update(|_, cx| {
 9295        cx.update_global::<SettingsStore, _>(|settings, cx| {
 9296            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 9297                settings.auto_signature_help = Some(false);
 9298                settings.show_signature_help_after_edits = Some(true);
 9299            });
 9300        });
 9301    });
 9302    cx.set_state(
 9303        &r#"
 9304            fn main() {
 9305                sampleˇ
 9306            }
 9307        "#
 9308        .unindent(),
 9309    );
 9310    cx.update_editor(|editor, window, cx| {
 9311        editor.handle_input("(", window, cx);
 9312    });
 9313    cx.assert_editor_state(
 9314        &"
 9315            fn main() {
 9316                sample(ˇ)
 9317            }
 9318        "
 9319        .unindent(),
 9320    );
 9321    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 9322    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9323        .await;
 9324    cx.update_editor(|editor, _, _| {
 9325        let signature_help_state = editor.signature_help_state.popover().cloned();
 9326        assert!(signature_help_state.is_some());
 9327        assert_eq!(
 9328            signature_help_state.unwrap().label,
 9329            "param1: u8, param2: u8"
 9330        );
 9331        editor.signature_help_state = SignatureHelpState::default();
 9332    });
 9333
 9334    // Ensure that signature_help is called when auto signature help override is enabled
 9335    cx.update(|_, cx| {
 9336        cx.update_global::<SettingsStore, _>(|settings, cx| {
 9337            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 9338                settings.auto_signature_help = Some(true);
 9339                settings.show_signature_help_after_edits = Some(false);
 9340            });
 9341        });
 9342    });
 9343    cx.set_state(
 9344        &r#"
 9345            fn main() {
 9346                sampleˇ
 9347            }
 9348        "#
 9349        .unindent(),
 9350    );
 9351    cx.update_editor(|editor, window, cx| {
 9352        editor.handle_input("(", window, cx);
 9353    });
 9354    cx.assert_editor_state(
 9355        &"
 9356            fn main() {
 9357                sample(ˇ)
 9358            }
 9359        "
 9360        .unindent(),
 9361    );
 9362    handle_signature_help_request(&mut cx, mocked_response).await;
 9363    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9364        .await;
 9365    cx.editor(|editor, _, _| {
 9366        let signature_help_state = editor.signature_help_state.popover().cloned();
 9367        assert!(signature_help_state.is_some());
 9368        assert_eq!(
 9369            signature_help_state.unwrap().label,
 9370            "param1: u8, param2: u8"
 9371        );
 9372    });
 9373}
 9374
 9375#[gpui::test]
 9376async fn test_signature_help(cx: &mut TestAppContext) {
 9377    init_test(cx, |_| {});
 9378    cx.update(|cx| {
 9379        cx.update_global::<SettingsStore, _>(|settings, cx| {
 9380            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 9381                settings.auto_signature_help = Some(true);
 9382            });
 9383        });
 9384    });
 9385
 9386    let mut cx = EditorLspTestContext::new_rust(
 9387        lsp::ServerCapabilities {
 9388            signature_help_provider: Some(lsp::SignatureHelpOptions {
 9389                ..Default::default()
 9390            }),
 9391            ..Default::default()
 9392        },
 9393        cx,
 9394    )
 9395    .await;
 9396
 9397    // A test that directly calls `show_signature_help`
 9398    cx.update_editor(|editor, window, cx| {
 9399        editor.show_signature_help(&ShowSignatureHelp, window, cx);
 9400    });
 9401
 9402    let mocked_response = lsp::SignatureHelp {
 9403        signatures: vec![lsp::SignatureInformation {
 9404            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9405            documentation: None,
 9406            parameters: Some(vec![
 9407                lsp::ParameterInformation {
 9408                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9409                    documentation: None,
 9410                },
 9411                lsp::ParameterInformation {
 9412                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9413                    documentation: None,
 9414                },
 9415            ]),
 9416            active_parameter: None,
 9417        }],
 9418        active_signature: Some(0),
 9419        active_parameter: Some(0),
 9420    };
 9421    handle_signature_help_request(&mut cx, mocked_response).await;
 9422
 9423    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9424        .await;
 9425
 9426    cx.editor(|editor, _, _| {
 9427        let signature_help_state = editor.signature_help_state.popover().cloned();
 9428        assert!(signature_help_state.is_some());
 9429        assert_eq!(
 9430            signature_help_state.unwrap().label,
 9431            "param1: u8, param2: u8"
 9432        );
 9433    });
 9434
 9435    // When exiting outside from inside the brackets, `signature_help` is closed.
 9436    cx.set_state(indoc! {"
 9437        fn main() {
 9438            sample(ˇ);
 9439        }
 9440
 9441        fn sample(param1: u8, param2: u8) {}
 9442    "});
 9443
 9444    cx.update_editor(|editor, window, cx| {
 9445        editor.change_selections(None, window, cx, |s| s.select_ranges([0..0]));
 9446    });
 9447
 9448    let mocked_response = lsp::SignatureHelp {
 9449        signatures: Vec::new(),
 9450        active_signature: None,
 9451        active_parameter: None,
 9452    };
 9453    handle_signature_help_request(&mut cx, mocked_response).await;
 9454
 9455    cx.condition(|editor, _| !editor.signature_help_state.is_shown())
 9456        .await;
 9457
 9458    cx.editor(|editor, _, _| {
 9459        assert!(!editor.signature_help_state.is_shown());
 9460    });
 9461
 9462    // When entering inside the brackets from outside, `show_signature_help` is automatically called.
 9463    cx.set_state(indoc! {"
 9464        fn main() {
 9465            sample(ˇ);
 9466        }
 9467
 9468        fn sample(param1: u8, param2: u8) {}
 9469    "});
 9470
 9471    let mocked_response = lsp::SignatureHelp {
 9472        signatures: vec![lsp::SignatureInformation {
 9473            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9474            documentation: None,
 9475            parameters: Some(vec![
 9476                lsp::ParameterInformation {
 9477                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9478                    documentation: None,
 9479                },
 9480                lsp::ParameterInformation {
 9481                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9482                    documentation: None,
 9483                },
 9484            ]),
 9485            active_parameter: None,
 9486        }],
 9487        active_signature: Some(0),
 9488        active_parameter: Some(0),
 9489    };
 9490    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 9491    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9492        .await;
 9493    cx.editor(|editor, _, _| {
 9494        assert!(editor.signature_help_state.is_shown());
 9495    });
 9496
 9497    // Restore the popover with more parameter input
 9498    cx.set_state(indoc! {"
 9499        fn main() {
 9500            sample(param1, param2ˇ);
 9501        }
 9502
 9503        fn sample(param1: u8, param2: u8) {}
 9504    "});
 9505
 9506    let mocked_response = lsp::SignatureHelp {
 9507        signatures: vec![lsp::SignatureInformation {
 9508            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9509            documentation: None,
 9510            parameters: Some(vec![
 9511                lsp::ParameterInformation {
 9512                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9513                    documentation: None,
 9514                },
 9515                lsp::ParameterInformation {
 9516                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9517                    documentation: None,
 9518                },
 9519            ]),
 9520            active_parameter: None,
 9521        }],
 9522        active_signature: Some(0),
 9523        active_parameter: Some(1),
 9524    };
 9525    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 9526    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9527        .await;
 9528
 9529    // When selecting a range, the popover is gone.
 9530    // Avoid using `cx.set_state` to not actually edit the document, just change its selections.
 9531    cx.update_editor(|editor, window, cx| {
 9532        editor.change_selections(None, window, cx, |s| {
 9533            s.select_ranges(Some(Point::new(1, 25)..Point::new(1, 19)));
 9534        })
 9535    });
 9536    cx.assert_editor_state(indoc! {"
 9537        fn main() {
 9538            sample(param1, «ˇparam2»);
 9539        }
 9540
 9541        fn sample(param1: u8, param2: u8) {}
 9542    "});
 9543    cx.editor(|editor, _, _| {
 9544        assert!(!editor.signature_help_state.is_shown());
 9545    });
 9546
 9547    // When unselecting again, the popover is back if within the brackets.
 9548    cx.update_editor(|editor, window, cx| {
 9549        editor.change_selections(None, window, cx, |s| {
 9550            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 9551        })
 9552    });
 9553    cx.assert_editor_state(indoc! {"
 9554        fn main() {
 9555            sample(param1, ˇparam2);
 9556        }
 9557
 9558        fn sample(param1: u8, param2: u8) {}
 9559    "});
 9560    handle_signature_help_request(&mut cx, mocked_response).await;
 9561    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9562        .await;
 9563    cx.editor(|editor, _, _| {
 9564        assert!(editor.signature_help_state.is_shown());
 9565    });
 9566
 9567    // Test to confirm that SignatureHelp does not appear after deselecting multiple ranges when it was hidden by pressing Escape.
 9568    cx.update_editor(|editor, window, cx| {
 9569        editor.change_selections(None, window, cx, |s| {
 9570            s.select_ranges(Some(Point::new(0, 0)..Point::new(0, 0)));
 9571            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 9572        })
 9573    });
 9574    cx.assert_editor_state(indoc! {"
 9575        fn main() {
 9576            sample(param1, ˇparam2);
 9577        }
 9578
 9579        fn sample(param1: u8, param2: u8) {}
 9580    "});
 9581
 9582    let mocked_response = lsp::SignatureHelp {
 9583        signatures: vec![lsp::SignatureInformation {
 9584            label: "fn sample(param1: u8, param2: u8)".to_string(),
 9585            documentation: None,
 9586            parameters: Some(vec![
 9587                lsp::ParameterInformation {
 9588                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 9589                    documentation: None,
 9590                },
 9591                lsp::ParameterInformation {
 9592                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 9593                    documentation: None,
 9594                },
 9595            ]),
 9596            active_parameter: None,
 9597        }],
 9598        active_signature: Some(0),
 9599        active_parameter: Some(1),
 9600    };
 9601    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 9602    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 9603        .await;
 9604    cx.update_editor(|editor, _, cx| {
 9605        editor.hide_signature_help(cx, SignatureHelpHiddenBy::Escape);
 9606    });
 9607    cx.condition(|editor, _| !editor.signature_help_state.is_shown())
 9608        .await;
 9609    cx.update_editor(|editor, window, cx| {
 9610        editor.change_selections(None, window, cx, |s| {
 9611            s.select_ranges(Some(Point::new(1, 25)..Point::new(1, 19)));
 9612        })
 9613    });
 9614    cx.assert_editor_state(indoc! {"
 9615        fn main() {
 9616            sample(param1, «ˇparam2»);
 9617        }
 9618
 9619        fn sample(param1: u8, param2: u8) {}
 9620    "});
 9621    cx.update_editor(|editor, window, cx| {
 9622        editor.change_selections(None, window, cx, |s| {
 9623            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 9624        })
 9625    });
 9626    cx.assert_editor_state(indoc! {"
 9627        fn main() {
 9628            sample(param1, ˇparam2);
 9629        }
 9630
 9631        fn sample(param1: u8, param2: u8) {}
 9632    "});
 9633    cx.condition(|editor, _| !editor.signature_help_state.is_shown()) // because hidden by escape
 9634        .await;
 9635}
 9636
 9637#[gpui::test]
 9638async fn test_completion_mode(cx: &mut TestAppContext) {
 9639    init_test(cx, |_| {});
 9640    let mut cx = EditorLspTestContext::new_rust(
 9641        lsp::ServerCapabilities {
 9642            completion_provider: Some(lsp::CompletionOptions {
 9643                resolve_provider: Some(true),
 9644                ..Default::default()
 9645            }),
 9646            ..Default::default()
 9647        },
 9648        cx,
 9649    )
 9650    .await;
 9651
 9652    struct Run {
 9653        run_description: &'static str,
 9654        initial_state: String,
 9655        buffer_marked_text: String,
 9656        completion_text: &'static str,
 9657        expected_with_insert_mode: String,
 9658        expected_with_replace_mode: String,
 9659        expected_with_replace_subsequence_mode: String,
 9660        expected_with_replace_suffix_mode: String,
 9661    }
 9662
 9663    let runs = [
 9664        Run {
 9665            run_description: "Start of word matches completion text",
 9666            initial_state: "before ediˇ after".into(),
 9667            buffer_marked_text: "before <edi|> after".into(),
 9668            completion_text: "editor",
 9669            expected_with_insert_mode: "before editorˇ after".into(),
 9670            expected_with_replace_mode: "before editorˇ after".into(),
 9671            expected_with_replace_subsequence_mode: "before editorˇ after".into(),
 9672            expected_with_replace_suffix_mode: "before editorˇ after".into(),
 9673        },
 9674        Run {
 9675            run_description: "Accept same text at the middle of the word",
 9676            initial_state: "before ediˇtor after".into(),
 9677            buffer_marked_text: "before <edi|tor> after".into(),
 9678            completion_text: "editor",
 9679            expected_with_insert_mode: "before editorˇtor after".into(),
 9680            expected_with_replace_mode: "before ediˇtor after".into(),
 9681            expected_with_replace_subsequence_mode: "before ediˇtor after".into(),
 9682            expected_with_replace_suffix_mode: "before ediˇtor after".into(),
 9683        },
 9684        Run {
 9685            run_description: "End of word matches completion text -- cursor at end",
 9686            initial_state: "before torˇ after".into(),
 9687            buffer_marked_text: "before <tor|> after".into(),
 9688            completion_text: "editor",
 9689            expected_with_insert_mode: "before editorˇ after".into(),
 9690            expected_with_replace_mode: "before editorˇ after".into(),
 9691            expected_with_replace_subsequence_mode: "before editorˇ after".into(),
 9692            expected_with_replace_suffix_mode: "before editorˇ after".into(),
 9693        },
 9694        Run {
 9695            run_description: "End of word matches completion text -- cursor at start",
 9696            initial_state: "before ˇtor after".into(),
 9697            buffer_marked_text: "before <|tor> after".into(),
 9698            completion_text: "editor",
 9699            expected_with_insert_mode: "before editorˇtor after".into(),
 9700            expected_with_replace_mode: "before editorˇ after".into(),
 9701            expected_with_replace_subsequence_mode: "before editorˇ after".into(),
 9702            expected_with_replace_suffix_mode: "before editorˇ after".into(),
 9703        },
 9704        Run {
 9705            run_description: "Prepend text containing whitespace",
 9706            initial_state: "pˇfield: bool".into(),
 9707            buffer_marked_text: "<p|field>: bool".into(),
 9708            completion_text: "pub ",
 9709            expected_with_insert_mode: "pub ˇfield: bool".into(),
 9710            expected_with_replace_mode: "pub ˇ: bool".into(),
 9711            expected_with_replace_subsequence_mode: "pub ˇfield: bool".into(),
 9712            expected_with_replace_suffix_mode: "pub ˇfield: bool".into(),
 9713        },
 9714        Run {
 9715            run_description: "Add element to start of list",
 9716            initial_state: "[element_ˇelement_2]".into(),
 9717            buffer_marked_text: "[<element_|element_2>]".into(),
 9718            completion_text: "element_1",
 9719            expected_with_insert_mode: "[element_1ˇelement_2]".into(),
 9720            expected_with_replace_mode: "[element_1ˇ]".into(),
 9721            expected_with_replace_subsequence_mode: "[element_1ˇelement_2]".into(),
 9722            expected_with_replace_suffix_mode: "[element_1ˇelement_2]".into(),
 9723        },
 9724        Run {
 9725            run_description: "Add element to start of list -- first and second elements are equal",
 9726            initial_state: "[elˇelement]".into(),
 9727            buffer_marked_text: "[<el|element>]".into(),
 9728            completion_text: "element",
 9729            expected_with_insert_mode: "[elementˇelement]".into(),
 9730            expected_with_replace_mode: "[elˇement]".into(),
 9731            expected_with_replace_subsequence_mode: "[elementˇelement]".into(),
 9732            expected_with_replace_suffix_mode: "[elˇement]".into(),
 9733        },
 9734        Run {
 9735            run_description: "Ends with matching suffix",
 9736            initial_state: "SubˇError".into(),
 9737            buffer_marked_text: "<Sub|Error>".into(),
 9738            completion_text: "SubscriptionError",
 9739            expected_with_insert_mode: "SubscriptionErrorˇError".into(),
 9740            expected_with_replace_mode: "SubscriptionErrorˇ".into(),
 9741            expected_with_replace_subsequence_mode: "SubscriptionErrorˇ".into(),
 9742            expected_with_replace_suffix_mode: "SubscriptionErrorˇ".into(),
 9743        },
 9744        Run {
 9745            run_description: "Suffix is a subsequence -- contiguous",
 9746            initial_state: "SubˇErr".into(),
 9747            buffer_marked_text: "<Sub|Err>".into(),
 9748            completion_text: "SubscriptionError",
 9749            expected_with_insert_mode: "SubscriptionErrorˇErr".into(),
 9750            expected_with_replace_mode: "SubscriptionErrorˇ".into(),
 9751            expected_with_replace_subsequence_mode: "SubscriptionErrorˇ".into(),
 9752            expected_with_replace_suffix_mode: "SubscriptionErrorˇErr".into(),
 9753        },
 9754        Run {
 9755            run_description: "Suffix is a subsequence -- non-contiguous -- replace intended",
 9756            initial_state: "Suˇscrirr".into(),
 9757            buffer_marked_text: "<Su|scrirr>".into(),
 9758            completion_text: "SubscriptionError",
 9759            expected_with_insert_mode: "SubscriptionErrorˇscrirr".into(),
 9760            expected_with_replace_mode: "SubscriptionErrorˇ".into(),
 9761            expected_with_replace_subsequence_mode: "SubscriptionErrorˇ".into(),
 9762            expected_with_replace_suffix_mode: "SubscriptionErrorˇscrirr".into(),
 9763        },
 9764        Run {
 9765            run_description: "Suffix is a subsequence -- non-contiguous -- replace unintended",
 9766            initial_state: "foo(indˇix)".into(),
 9767            buffer_marked_text: "foo(<ind|ix>)".into(),
 9768            completion_text: "node_index",
 9769            expected_with_insert_mode: "foo(node_indexˇix)".into(),
 9770            expected_with_replace_mode: "foo(node_indexˇ)".into(),
 9771            expected_with_replace_subsequence_mode: "foo(node_indexˇix)".into(),
 9772            expected_with_replace_suffix_mode: "foo(node_indexˇix)".into(),
 9773        },
 9774    ];
 9775
 9776    for run in runs {
 9777        let run_variations = [
 9778            (LspInsertMode::Insert, run.expected_with_insert_mode),
 9779            (LspInsertMode::Replace, run.expected_with_replace_mode),
 9780            (
 9781                LspInsertMode::ReplaceSubsequence,
 9782                run.expected_with_replace_subsequence_mode,
 9783            ),
 9784            (
 9785                LspInsertMode::ReplaceSuffix,
 9786                run.expected_with_replace_suffix_mode,
 9787            ),
 9788        ];
 9789
 9790        for (lsp_insert_mode, expected_text) in run_variations {
 9791            eprintln!(
 9792                "run = {:?}, mode = {lsp_insert_mode:.?}",
 9793                run.run_description,
 9794            );
 9795
 9796            update_test_language_settings(&mut cx, |settings| {
 9797                settings.defaults.completions = Some(CompletionSettings {
 9798                    lsp_insert_mode,
 9799                    words: WordsCompletionMode::Disabled,
 9800                    lsp: true,
 9801                    lsp_fetch_timeout_ms: 0,
 9802                });
 9803            });
 9804
 9805            cx.set_state(&run.initial_state);
 9806            cx.update_editor(|editor, window, cx| {
 9807                editor.show_completions(&ShowCompletions { trigger: None }, window, cx);
 9808            });
 9809
 9810            let counter = Arc::new(AtomicUsize::new(0));
 9811            handle_completion_request_with_insert_and_replace(
 9812                &mut cx,
 9813                &run.buffer_marked_text,
 9814                vec![run.completion_text],
 9815                counter.clone(),
 9816            )
 9817            .await;
 9818            cx.condition(|editor, _| editor.context_menu_visible())
 9819                .await;
 9820            assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
 9821
 9822            let apply_additional_edits = cx.update_editor(|editor, window, cx| {
 9823                editor
 9824                    .confirm_completion(&ConfirmCompletion::default(), window, cx)
 9825                    .unwrap()
 9826            });
 9827            cx.assert_editor_state(&expected_text);
 9828            handle_resolve_completion_request(&mut cx, None).await;
 9829            apply_additional_edits.await.unwrap();
 9830        }
 9831    }
 9832}
 9833
 9834#[gpui::test]
 9835async fn test_completion_with_mode_specified_by_action(cx: &mut TestAppContext) {
 9836    init_test(cx, |_| {});
 9837    let mut cx = EditorLspTestContext::new_rust(
 9838        lsp::ServerCapabilities {
 9839            completion_provider: Some(lsp::CompletionOptions {
 9840                resolve_provider: Some(true),
 9841                ..Default::default()
 9842            }),
 9843            ..Default::default()
 9844        },
 9845        cx,
 9846    )
 9847    .await;
 9848
 9849    let initial_state = "SubˇError";
 9850    let buffer_marked_text = "<Sub|Error>";
 9851    let completion_text = "SubscriptionError";
 9852    let expected_with_insert_mode = "SubscriptionErrorˇError";
 9853    let expected_with_replace_mode = "SubscriptionErrorˇ";
 9854
 9855    update_test_language_settings(&mut cx, |settings| {
 9856        settings.defaults.completions = Some(CompletionSettings {
 9857            words: WordsCompletionMode::Disabled,
 9858            // set the opposite here to ensure that the action is overriding the default behavior
 9859            lsp_insert_mode: LspInsertMode::Insert,
 9860            lsp: true,
 9861            lsp_fetch_timeout_ms: 0,
 9862        });
 9863    });
 9864
 9865    cx.set_state(initial_state);
 9866    cx.update_editor(|editor, window, cx| {
 9867        editor.show_completions(&ShowCompletions { trigger: None }, window, cx);
 9868    });
 9869
 9870    let counter = Arc::new(AtomicUsize::new(0));
 9871    handle_completion_request_with_insert_and_replace(
 9872        &mut cx,
 9873        &buffer_marked_text,
 9874        vec![completion_text],
 9875        counter.clone(),
 9876    )
 9877    .await;
 9878    cx.condition(|editor, _| editor.context_menu_visible())
 9879        .await;
 9880    assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
 9881
 9882    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
 9883        editor
 9884            .confirm_completion_replace(&ConfirmCompletionReplace, window, cx)
 9885            .unwrap()
 9886    });
 9887    cx.assert_editor_state(&expected_with_replace_mode);
 9888    handle_resolve_completion_request(&mut cx, None).await;
 9889    apply_additional_edits.await.unwrap();
 9890
 9891    update_test_language_settings(&mut cx, |settings| {
 9892        settings.defaults.completions = Some(CompletionSettings {
 9893            words: WordsCompletionMode::Disabled,
 9894            // set the opposite here to ensure that the action is overriding the default behavior
 9895            lsp_insert_mode: LspInsertMode::Replace,
 9896            lsp: true,
 9897            lsp_fetch_timeout_ms: 0,
 9898        });
 9899    });
 9900
 9901    cx.set_state(initial_state);
 9902    cx.update_editor(|editor, window, cx| {
 9903        editor.show_completions(&ShowCompletions { trigger: None }, window, cx);
 9904    });
 9905    handle_completion_request_with_insert_and_replace(
 9906        &mut cx,
 9907        &buffer_marked_text,
 9908        vec![completion_text],
 9909        counter.clone(),
 9910    )
 9911    .await;
 9912    cx.condition(|editor, _| editor.context_menu_visible())
 9913        .await;
 9914    assert_eq!(counter.load(atomic::Ordering::Acquire), 2);
 9915
 9916    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
 9917        editor
 9918            .confirm_completion_insert(&ConfirmCompletionInsert, window, cx)
 9919            .unwrap()
 9920    });
 9921    cx.assert_editor_state(&expected_with_insert_mode);
 9922    handle_resolve_completion_request(&mut cx, None).await;
 9923    apply_additional_edits.await.unwrap();
 9924}
 9925
 9926#[gpui::test]
 9927async fn test_completion(cx: &mut TestAppContext) {
 9928    init_test(cx, |_| {});
 9929
 9930    let mut cx = EditorLspTestContext::new_rust(
 9931        lsp::ServerCapabilities {
 9932            completion_provider: Some(lsp::CompletionOptions {
 9933                trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
 9934                resolve_provider: Some(true),
 9935                ..Default::default()
 9936            }),
 9937            signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
 9938            ..Default::default()
 9939        },
 9940        cx,
 9941    )
 9942    .await;
 9943    let counter = Arc::new(AtomicUsize::new(0));
 9944
 9945    cx.set_state(indoc! {"
 9946        oneˇ
 9947        two
 9948        three
 9949    "});
 9950    cx.simulate_keystroke(".");
 9951    handle_completion_request(
 9952        &mut cx,
 9953        indoc! {"
 9954            one.|<>
 9955            two
 9956            three
 9957        "},
 9958        vec!["first_completion", "second_completion"],
 9959        counter.clone(),
 9960    )
 9961    .await;
 9962    cx.condition(|editor, _| editor.context_menu_visible())
 9963        .await;
 9964    assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
 9965
 9966    let _handler = handle_signature_help_request(
 9967        &mut cx,
 9968        lsp::SignatureHelp {
 9969            signatures: vec![lsp::SignatureInformation {
 9970                label: "test signature".to_string(),
 9971                documentation: None,
 9972                parameters: Some(vec![lsp::ParameterInformation {
 9973                    label: lsp::ParameterLabel::Simple("foo: u8".to_string()),
 9974                    documentation: None,
 9975                }]),
 9976                active_parameter: None,
 9977            }],
 9978            active_signature: None,
 9979            active_parameter: None,
 9980        },
 9981    );
 9982    cx.update_editor(|editor, window, cx| {
 9983        assert!(
 9984            !editor.signature_help_state.is_shown(),
 9985            "No signature help was called for"
 9986        );
 9987        editor.show_signature_help(&ShowSignatureHelp, window, cx);
 9988    });
 9989    cx.run_until_parked();
 9990    cx.update_editor(|editor, _, _| {
 9991        assert!(
 9992            !editor.signature_help_state.is_shown(),
 9993            "No signature help should be shown when completions menu is open"
 9994        );
 9995    });
 9996
 9997    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
 9998        editor.context_menu_next(&Default::default(), window, cx);
 9999        editor
10000            .confirm_completion(&ConfirmCompletion::default(), window, cx)
10001            .unwrap()
10002    });
10003    cx.assert_editor_state(indoc! {"
10004        one.second_completionˇ
10005        two
10006        three
10007    "});
10008
10009    handle_resolve_completion_request(
10010        &mut cx,
10011        Some(vec![
10012            (
10013                //This overlaps with the primary completion edit which is
10014                //misbehavior from the LSP spec, test that we filter it out
10015                indoc! {"
10016                    one.second_ˇcompletion
10017                    two
10018                    threeˇ
10019                "},
10020                "overlapping additional edit",
10021            ),
10022            (
10023                indoc! {"
10024                    one.second_completion
10025                    two
10026                    threeˇ
10027                "},
10028                "\nadditional edit",
10029            ),
10030        ]),
10031    )
10032    .await;
10033    apply_additional_edits.await.unwrap();
10034    cx.assert_editor_state(indoc! {"
10035        one.second_completionˇ
10036        two
10037        three
10038        additional edit
10039    "});
10040
10041    cx.set_state(indoc! {"
10042        one.second_completion
10043        twoˇ
10044        threeˇ
10045        additional edit
10046    "});
10047    cx.simulate_keystroke(" ");
10048    assert!(cx.editor(|e, _, _| e.context_menu.borrow_mut().is_none()));
10049    cx.simulate_keystroke("s");
10050    assert!(cx.editor(|e, _, _| e.context_menu.borrow_mut().is_none()));
10051
10052    cx.assert_editor_state(indoc! {"
10053        one.second_completion
10054        two sˇ
10055        three sˇ
10056        additional edit
10057    "});
10058    handle_completion_request(
10059        &mut cx,
10060        indoc! {"
10061            one.second_completion
10062            two s
10063            three <s|>
10064            additional edit
10065        "},
10066        vec!["fourth_completion", "fifth_completion", "sixth_completion"],
10067        counter.clone(),
10068    )
10069    .await;
10070    cx.condition(|editor, _| editor.context_menu_visible())
10071        .await;
10072    assert_eq!(counter.load(atomic::Ordering::Acquire), 2);
10073
10074    cx.simulate_keystroke("i");
10075
10076    handle_completion_request(
10077        &mut cx,
10078        indoc! {"
10079            one.second_completion
10080            two si
10081            three <si|>
10082            additional edit
10083        "},
10084        vec!["fourth_completion", "fifth_completion", "sixth_completion"],
10085        counter.clone(),
10086    )
10087    .await;
10088    cx.condition(|editor, _| editor.context_menu_visible())
10089        .await;
10090    assert_eq!(counter.load(atomic::Ordering::Acquire), 3);
10091
10092    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
10093        editor
10094            .confirm_completion(&ConfirmCompletion::default(), window, cx)
10095            .unwrap()
10096    });
10097    cx.assert_editor_state(indoc! {"
10098        one.second_completion
10099        two sixth_completionˇ
10100        three sixth_completionˇ
10101        additional edit
10102    "});
10103
10104    apply_additional_edits.await.unwrap();
10105
10106    update_test_language_settings(&mut cx, |settings| {
10107        settings.defaults.show_completions_on_input = Some(false);
10108    });
10109    cx.set_state("editorˇ");
10110    cx.simulate_keystroke(".");
10111    assert!(cx.editor(|e, _, _| e.context_menu.borrow_mut().is_none()));
10112    cx.simulate_keystrokes("c l o");
10113    cx.assert_editor_state("editor.cloˇ");
10114    assert!(cx.editor(|e, _, _| e.context_menu.borrow_mut().is_none()));
10115    cx.update_editor(|editor, window, cx| {
10116        editor.show_completions(&ShowCompletions { trigger: None }, window, cx);
10117    });
10118    handle_completion_request(
10119        &mut cx,
10120        "editor.<clo|>",
10121        vec!["close", "clobber"],
10122        counter.clone(),
10123    )
10124    .await;
10125    cx.condition(|editor, _| editor.context_menu_visible())
10126        .await;
10127    assert_eq!(counter.load(atomic::Ordering::Acquire), 4);
10128
10129    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
10130        editor
10131            .confirm_completion(&ConfirmCompletion::default(), window, cx)
10132            .unwrap()
10133    });
10134    cx.assert_editor_state("editor.closeˇ");
10135    handle_resolve_completion_request(&mut cx, None).await;
10136    apply_additional_edits.await.unwrap();
10137}
10138
10139#[gpui::test]
10140async fn test_word_completion(cx: &mut TestAppContext) {
10141    let lsp_fetch_timeout_ms = 10;
10142    init_test(cx, |language_settings| {
10143        language_settings.defaults.completions = Some(CompletionSettings {
10144            words: WordsCompletionMode::Fallback,
10145            lsp: true,
10146            lsp_fetch_timeout_ms: 10,
10147            lsp_insert_mode: LspInsertMode::Insert,
10148        });
10149    });
10150
10151    let mut cx = EditorLspTestContext::new_rust(
10152        lsp::ServerCapabilities {
10153            completion_provider: Some(lsp::CompletionOptions {
10154                trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
10155                ..lsp::CompletionOptions::default()
10156            }),
10157            signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
10158            ..lsp::ServerCapabilities::default()
10159        },
10160        cx,
10161    )
10162    .await;
10163
10164    let throttle_completions = Arc::new(AtomicBool::new(false));
10165
10166    let lsp_throttle_completions = throttle_completions.clone();
10167    let _completion_requests_handler =
10168        cx.lsp
10169            .server
10170            .on_request::<lsp::request::Completion, _, _>(move |_, cx| {
10171                let lsp_throttle_completions = lsp_throttle_completions.clone();
10172                let cx = cx.clone();
10173                async move {
10174                    if lsp_throttle_completions.load(atomic::Ordering::Acquire) {
10175                        cx.background_executor()
10176                            .timer(Duration::from_millis(lsp_fetch_timeout_ms * 10))
10177                            .await;
10178                    }
10179                    Ok(Some(lsp::CompletionResponse::Array(vec![
10180                        lsp::CompletionItem {
10181                            label: "first".into(),
10182                            ..lsp::CompletionItem::default()
10183                        },
10184                        lsp::CompletionItem {
10185                            label: "last".into(),
10186                            ..lsp::CompletionItem::default()
10187                        },
10188                    ])))
10189                }
10190            });
10191
10192    cx.set_state(indoc! {"
10193        oneˇ
10194        two
10195        three
10196    "});
10197    cx.simulate_keystroke(".");
10198    cx.executor().run_until_parked();
10199    cx.condition(|editor, _| editor.context_menu_visible())
10200        .await;
10201    cx.update_editor(|editor, window, cx| {
10202        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10203        {
10204            assert_eq!(
10205                completion_menu_entries(&menu),
10206                &["first", "last"],
10207                "When LSP server is fast to reply, no fallback word completions are used"
10208            );
10209        } else {
10210            panic!("expected completion menu to be open");
10211        }
10212        editor.cancel(&Cancel, window, cx);
10213    });
10214    cx.executor().run_until_parked();
10215    cx.condition(|editor, _| !editor.context_menu_visible())
10216        .await;
10217
10218    throttle_completions.store(true, atomic::Ordering::Release);
10219    cx.simulate_keystroke(".");
10220    cx.executor()
10221        .advance_clock(Duration::from_millis(lsp_fetch_timeout_ms * 2));
10222    cx.executor().run_until_parked();
10223    cx.condition(|editor, _| editor.context_menu_visible())
10224        .await;
10225    cx.update_editor(|editor, _, _| {
10226        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10227        {
10228            assert_eq!(completion_menu_entries(&menu), &["one", "three", "two"],
10229                "When LSP server is slow, document words can be shown instead, if configured accordingly");
10230        } else {
10231            panic!("expected completion menu to be open");
10232        }
10233    });
10234}
10235
10236#[gpui::test]
10237async fn test_word_completions_do_not_duplicate_lsp_ones(cx: &mut TestAppContext) {
10238    init_test(cx, |language_settings| {
10239        language_settings.defaults.completions = Some(CompletionSettings {
10240            words: WordsCompletionMode::Enabled,
10241            lsp: true,
10242            lsp_fetch_timeout_ms: 0,
10243            lsp_insert_mode: LspInsertMode::Insert,
10244        });
10245    });
10246
10247    let mut cx = EditorLspTestContext::new_rust(
10248        lsp::ServerCapabilities {
10249            completion_provider: Some(lsp::CompletionOptions {
10250                trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
10251                ..lsp::CompletionOptions::default()
10252            }),
10253            signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
10254            ..lsp::ServerCapabilities::default()
10255        },
10256        cx,
10257    )
10258    .await;
10259
10260    let _completion_requests_handler =
10261        cx.lsp
10262            .server
10263            .on_request::<lsp::request::Completion, _, _>(move |_, _| async move {
10264                Ok(Some(lsp::CompletionResponse::Array(vec![
10265                    lsp::CompletionItem {
10266                        label: "first".into(),
10267                        ..lsp::CompletionItem::default()
10268                    },
10269                    lsp::CompletionItem {
10270                        label: "last".into(),
10271                        ..lsp::CompletionItem::default()
10272                    },
10273                ])))
10274            });
10275
10276    cx.set_state(indoc! {"ˇ
10277        first
10278        last
10279        second
10280    "});
10281    cx.simulate_keystroke(".");
10282    cx.executor().run_until_parked();
10283    cx.condition(|editor, _| editor.context_menu_visible())
10284        .await;
10285    cx.update_editor(|editor, _, _| {
10286        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10287        {
10288            assert_eq!(
10289                completion_menu_entries(&menu),
10290                &["first", "last", "second"],
10291                "Word completions that has the same edit as the any of the LSP ones, should not be proposed"
10292            );
10293        } else {
10294            panic!("expected completion menu to be open");
10295        }
10296    });
10297}
10298
10299#[gpui::test]
10300async fn test_word_completions_continue_on_typing(cx: &mut TestAppContext) {
10301    init_test(cx, |language_settings| {
10302        language_settings.defaults.completions = Some(CompletionSettings {
10303            words: WordsCompletionMode::Disabled,
10304            lsp: true,
10305            lsp_fetch_timeout_ms: 0,
10306            lsp_insert_mode: LspInsertMode::Insert,
10307        });
10308    });
10309
10310    let mut cx = EditorLspTestContext::new_rust(
10311        lsp::ServerCapabilities {
10312            completion_provider: Some(lsp::CompletionOptions {
10313                trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
10314                ..lsp::CompletionOptions::default()
10315            }),
10316            signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
10317            ..lsp::ServerCapabilities::default()
10318        },
10319        cx,
10320    )
10321    .await;
10322
10323    let _completion_requests_handler =
10324        cx.lsp
10325            .server
10326            .on_request::<lsp::request::Completion, _, _>(move |_, _| async move {
10327                panic!("LSP completions should not be queried when dealing with word completions")
10328            });
10329
10330    cx.set_state(indoc! {"ˇ
10331        first
10332        last
10333        second
10334    "});
10335    cx.update_editor(|editor, window, cx| {
10336        editor.show_word_completions(&ShowWordCompletions, window, cx);
10337    });
10338    cx.executor().run_until_parked();
10339    cx.condition(|editor, _| editor.context_menu_visible())
10340        .await;
10341    cx.update_editor(|editor, _, _| {
10342        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10343        {
10344            assert_eq!(
10345                completion_menu_entries(&menu),
10346                &["first", "last", "second"],
10347                "`ShowWordCompletions` action should show word completions"
10348            );
10349        } else {
10350            panic!("expected completion menu to be open");
10351        }
10352    });
10353
10354    cx.simulate_keystroke("l");
10355    cx.executor().run_until_parked();
10356    cx.condition(|editor, _| editor.context_menu_visible())
10357        .await;
10358    cx.update_editor(|editor, _, _| {
10359        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10360        {
10361            assert_eq!(
10362                completion_menu_entries(&menu),
10363                &["last"],
10364                "After showing word completions, further editing should filter them and not query the LSP"
10365            );
10366        } else {
10367            panic!("expected completion menu to be open");
10368        }
10369    });
10370}
10371
10372#[gpui::test]
10373async fn test_word_completions_usually_skip_digits(cx: &mut TestAppContext) {
10374    init_test(cx, |language_settings| {
10375        language_settings.defaults.completions = Some(CompletionSettings {
10376            words: WordsCompletionMode::Fallback,
10377            lsp: false,
10378            lsp_fetch_timeout_ms: 0,
10379            lsp_insert_mode: LspInsertMode::Insert,
10380        });
10381    });
10382
10383    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
10384
10385    cx.set_state(indoc! {"ˇ
10386        0_usize
10387        let
10388        33
10389        4.5f32
10390    "});
10391    cx.update_editor(|editor, window, cx| {
10392        editor.show_completions(&ShowCompletions::default(), window, cx);
10393    });
10394    cx.executor().run_until_parked();
10395    cx.condition(|editor, _| editor.context_menu_visible())
10396        .await;
10397    cx.update_editor(|editor, window, cx| {
10398        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10399        {
10400            assert_eq!(
10401                completion_menu_entries(&menu),
10402                &["let"],
10403                "With no digits in the completion query, no digits should be in the word completions"
10404            );
10405        } else {
10406            panic!("expected completion menu to be open");
10407        }
10408        editor.cancel(&Cancel, window, cx);
10409    });
10410
10411    cx.set_state(indoc! {"10412        0_usize
10413        let
10414        3
10415        33.35f32
10416    "});
10417    cx.update_editor(|editor, window, cx| {
10418        editor.show_completions(&ShowCompletions::default(), window, cx);
10419    });
10420    cx.executor().run_until_parked();
10421    cx.condition(|editor, _| editor.context_menu_visible())
10422        .await;
10423    cx.update_editor(|editor, _, _| {
10424        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10425        {
10426            assert_eq!(completion_menu_entries(&menu), &["33", "35f32"], "The digit is in the completion query, \
10427                return matching words with digits (`33`, `35f32`) but exclude query duplicates (`3`)");
10428        } else {
10429            panic!("expected completion menu to be open");
10430        }
10431    });
10432}
10433
10434fn gen_text_edit(params: &CompletionParams, text: &str) -> Option<lsp::CompletionTextEdit> {
10435    let position = || lsp::Position {
10436        line: params.text_document_position.position.line,
10437        character: params.text_document_position.position.character,
10438    };
10439    Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10440        range: lsp::Range {
10441            start: position(),
10442            end: position(),
10443        },
10444        new_text: text.to_string(),
10445    }))
10446}
10447
10448#[gpui::test]
10449async fn test_multiline_completion(cx: &mut TestAppContext) {
10450    init_test(cx, |_| {});
10451
10452    let fs = FakeFs::new(cx.executor());
10453    fs.insert_tree(
10454        path!("/a"),
10455        json!({
10456            "main.ts": "a",
10457        }),
10458    )
10459    .await;
10460
10461    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
10462    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
10463    let typescript_language = Arc::new(Language::new(
10464        LanguageConfig {
10465            name: "TypeScript".into(),
10466            matcher: LanguageMatcher {
10467                path_suffixes: vec!["ts".to_string()],
10468                ..LanguageMatcher::default()
10469            },
10470            line_comments: vec!["// ".into()],
10471            ..LanguageConfig::default()
10472        },
10473        Some(tree_sitter_typescript::LANGUAGE_TYPESCRIPT.into()),
10474    ));
10475    language_registry.add(typescript_language.clone());
10476    let mut fake_servers = language_registry.register_fake_lsp(
10477        "TypeScript",
10478        FakeLspAdapter {
10479            capabilities: lsp::ServerCapabilities {
10480                completion_provider: Some(lsp::CompletionOptions {
10481                    trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
10482                    ..lsp::CompletionOptions::default()
10483                }),
10484                signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
10485                ..lsp::ServerCapabilities::default()
10486            },
10487            // Emulate vtsls label generation
10488            label_for_completion: Some(Box::new(|item, _| {
10489                let text = if let Some(description) = item
10490                    .label_details
10491                    .as_ref()
10492                    .and_then(|label_details| label_details.description.as_ref())
10493                {
10494                    format!("{} {}", item.label, description)
10495                } else if let Some(detail) = &item.detail {
10496                    format!("{} {}", item.label, detail)
10497                } else {
10498                    item.label.clone()
10499                };
10500                let len = text.len();
10501                Some(language::CodeLabel {
10502                    text,
10503                    runs: Vec::new(),
10504                    filter_range: 0..len,
10505                })
10506            })),
10507            ..FakeLspAdapter::default()
10508        },
10509    );
10510    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
10511    let cx = &mut VisualTestContext::from_window(*workspace, cx);
10512    let worktree_id = workspace
10513        .update(cx, |workspace, _window, cx| {
10514            workspace.project().update(cx, |project, cx| {
10515                project.worktrees(cx).next().unwrap().read(cx).id()
10516            })
10517        })
10518        .unwrap();
10519    let _buffer = project
10520        .update(cx, |project, cx| {
10521            project.open_local_buffer_with_lsp(path!("/a/main.ts"), cx)
10522        })
10523        .await
10524        .unwrap();
10525    let editor = workspace
10526        .update(cx, |workspace, window, cx| {
10527            workspace.open_path((worktree_id, "main.ts"), None, true, window, cx)
10528        })
10529        .unwrap()
10530        .await
10531        .unwrap()
10532        .downcast::<Editor>()
10533        .unwrap();
10534    let fake_server = fake_servers.next().await.unwrap();
10535
10536    let multiline_label = "StickyHeaderExcerpt {\n            excerpt,\n            next_excerpt_controls_present,\n            next_buffer_row,\n        }: StickyHeaderExcerpt<'_>,";
10537    let multiline_label_2 = "a\nb\nc\n";
10538    let multiline_detail = "[]struct {\n\tSignerId\tstruct {\n\t\tIssuer\t\t\tstring\t`json:\"issuer\"`\n\t\tSubjectSerialNumber\"`\n}}";
10539    let multiline_description = "d\ne\nf\n";
10540    let multiline_detail_2 = "g\nh\ni\n";
10541
10542    let mut completion_handle = fake_server.set_request_handler::<lsp::request::Completion, _, _>(
10543        move |params, _| async move {
10544            Ok(Some(lsp::CompletionResponse::Array(vec![
10545                lsp::CompletionItem {
10546                    label: multiline_label.to_string(),
10547                    text_edit: gen_text_edit(&params, "new_text_1"),
10548                    ..lsp::CompletionItem::default()
10549                },
10550                lsp::CompletionItem {
10551                    label: "single line label 1".to_string(),
10552                    detail: Some(multiline_detail.to_string()),
10553                    text_edit: gen_text_edit(&params, "new_text_2"),
10554                    ..lsp::CompletionItem::default()
10555                },
10556                lsp::CompletionItem {
10557                    label: "single line label 2".to_string(),
10558                    label_details: Some(lsp::CompletionItemLabelDetails {
10559                        description: Some(multiline_description.to_string()),
10560                        detail: None,
10561                    }),
10562                    text_edit: gen_text_edit(&params, "new_text_2"),
10563                    ..lsp::CompletionItem::default()
10564                },
10565                lsp::CompletionItem {
10566                    label: multiline_label_2.to_string(),
10567                    detail: Some(multiline_detail_2.to_string()),
10568                    text_edit: gen_text_edit(&params, "new_text_3"),
10569                    ..lsp::CompletionItem::default()
10570                },
10571                lsp::CompletionItem {
10572                    label: "Label with many     spaces and \t but without newlines".to_string(),
10573                    detail: Some(
10574                        "Details with many     spaces and \t but without newlines".to_string(),
10575                    ),
10576                    text_edit: gen_text_edit(&params, "new_text_4"),
10577                    ..lsp::CompletionItem::default()
10578                },
10579            ])))
10580        },
10581    );
10582
10583    editor.update_in(cx, |editor, window, cx| {
10584        cx.focus_self(window);
10585        editor.move_to_end(&MoveToEnd, window, cx);
10586        editor.handle_input(".", window, cx);
10587    });
10588    cx.run_until_parked();
10589    completion_handle.next().await.unwrap();
10590
10591    editor.update(cx, |editor, _| {
10592        assert!(editor.context_menu_visible());
10593        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10594        {
10595            let completion_labels = menu
10596                .completions
10597                .borrow()
10598                .iter()
10599                .map(|c| c.label.text.clone())
10600                .collect::<Vec<_>>();
10601            assert_eq!(
10602                completion_labels,
10603                &[
10604                    "StickyHeaderExcerpt { excerpt, next_excerpt_controls_present, next_buffer_row, }: StickyHeaderExcerpt<'_>,",
10605                    "single line label 1 []struct { SignerId struct { Issuer string `json:\"issuer\"` SubjectSerialNumber\"` }}",
10606                    "single line label 2 d e f ",
10607                    "a b c g h i ",
10608                    "Label with many     spaces and \t but without newlines Details with many     spaces and \t but without newlines",
10609                ],
10610                "Completion items should have their labels without newlines, also replacing excessive whitespaces. Completion items without newlines should not be altered.",
10611            );
10612
10613            for completion in menu
10614                .completions
10615                .borrow()
10616                .iter() {
10617                    assert_eq!(
10618                        completion.label.filter_range,
10619                        0..completion.label.text.len(),
10620                        "Adjusted completion items should still keep their filter ranges for the entire label. Item: {completion:?}"
10621                    );
10622                }
10623        } else {
10624            panic!("expected completion menu to be open");
10625        }
10626    });
10627}
10628
10629#[gpui::test]
10630async fn test_completion_page_up_down_keys(cx: &mut TestAppContext) {
10631    init_test(cx, |_| {});
10632    let mut cx = EditorLspTestContext::new_rust(
10633        lsp::ServerCapabilities {
10634            completion_provider: Some(lsp::CompletionOptions {
10635                trigger_characters: Some(vec![".".to_string()]),
10636                ..Default::default()
10637            }),
10638            ..Default::default()
10639        },
10640        cx,
10641    )
10642    .await;
10643    cx.lsp
10644        .set_request_handler::<lsp::request::Completion, _, _>(move |_, _| async move {
10645            Ok(Some(lsp::CompletionResponse::Array(vec![
10646                lsp::CompletionItem {
10647                    label: "first".into(),
10648                    ..Default::default()
10649                },
10650                lsp::CompletionItem {
10651                    label: "last".into(),
10652                    ..Default::default()
10653                },
10654            ])))
10655        });
10656    cx.set_state("variableˇ");
10657    cx.simulate_keystroke(".");
10658    cx.executor().run_until_parked();
10659
10660    cx.update_editor(|editor, _, _| {
10661        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10662        {
10663            assert_eq!(completion_menu_entries(&menu), &["first", "last"]);
10664        } else {
10665            panic!("expected completion menu to be open");
10666        }
10667    });
10668
10669    cx.update_editor(|editor, window, cx| {
10670        editor.move_page_down(&MovePageDown::default(), window, cx);
10671        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10672        {
10673            assert!(
10674                menu.selected_item == 1,
10675                "expected PageDown to select the last item from the context menu"
10676            );
10677        } else {
10678            panic!("expected completion menu to stay open after PageDown");
10679        }
10680    });
10681
10682    cx.update_editor(|editor, window, cx| {
10683        editor.move_page_up(&MovePageUp::default(), window, cx);
10684        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10685        {
10686            assert!(
10687                menu.selected_item == 0,
10688                "expected PageUp to select the first item from the context menu"
10689            );
10690        } else {
10691            panic!("expected completion menu to stay open after PageUp");
10692        }
10693    });
10694}
10695
10696#[gpui::test]
10697async fn test_completion_sort(cx: &mut TestAppContext) {
10698    init_test(cx, |_| {});
10699    let mut cx = EditorLspTestContext::new_rust(
10700        lsp::ServerCapabilities {
10701            completion_provider: Some(lsp::CompletionOptions {
10702                trigger_characters: Some(vec![".".to_string()]),
10703                ..Default::default()
10704            }),
10705            ..Default::default()
10706        },
10707        cx,
10708    )
10709    .await;
10710    cx.lsp
10711        .set_request_handler::<lsp::request::Completion, _, _>(move |_, _| async move {
10712            Ok(Some(lsp::CompletionResponse::Array(vec![
10713                lsp::CompletionItem {
10714                    label: "Range".into(),
10715                    sort_text: Some("a".into()),
10716                    ..Default::default()
10717                },
10718                lsp::CompletionItem {
10719                    label: "r".into(),
10720                    sort_text: Some("b".into()),
10721                    ..Default::default()
10722                },
10723                lsp::CompletionItem {
10724                    label: "ret".into(),
10725                    sort_text: Some("c".into()),
10726                    ..Default::default()
10727                },
10728                lsp::CompletionItem {
10729                    label: "return".into(),
10730                    sort_text: Some("d".into()),
10731                    ..Default::default()
10732                },
10733                lsp::CompletionItem {
10734                    label: "slice".into(),
10735                    sort_text: Some("d".into()),
10736                    ..Default::default()
10737                },
10738            ])))
10739        });
10740    cx.set_state("");
10741    cx.executor().run_until_parked();
10742    cx.update_editor(|editor, window, cx| {
10743        editor.show_completions(
10744            &ShowCompletions {
10745                trigger: Some("r".into()),
10746            },
10747            window,
10748            cx,
10749        );
10750    });
10751    cx.executor().run_until_parked();
10752
10753    cx.update_editor(|editor, _, _| {
10754        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
10755        {
10756            assert_eq!(
10757                completion_menu_entries(&menu),
10758                &["r", "ret", "Range", "return"]
10759            );
10760        } else {
10761            panic!("expected completion menu to be open");
10762        }
10763    });
10764}
10765
10766#[gpui::test]
10767async fn test_as_is_completions(cx: &mut TestAppContext) {
10768    init_test(cx, |_| {});
10769    let mut cx = EditorLspTestContext::new_rust(
10770        lsp::ServerCapabilities {
10771            completion_provider: Some(lsp::CompletionOptions {
10772                ..Default::default()
10773            }),
10774            ..Default::default()
10775        },
10776        cx,
10777    )
10778    .await;
10779    cx.lsp
10780        .set_request_handler::<lsp::request::Completion, _, _>(move |_, _| async move {
10781            Ok(Some(lsp::CompletionResponse::Array(vec![
10782                lsp::CompletionItem {
10783                    label: "unsafe".into(),
10784                    text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10785                        range: lsp::Range {
10786                            start: lsp::Position {
10787                                line: 1,
10788                                character: 2,
10789                            },
10790                            end: lsp::Position {
10791                                line: 1,
10792                                character: 3,
10793                            },
10794                        },
10795                        new_text: "unsafe".to_string(),
10796                    })),
10797                    insert_text_mode: Some(lsp::InsertTextMode::AS_IS),
10798                    ..Default::default()
10799                },
10800            ])))
10801        });
10802    cx.set_state("fn a() {}\n");
10803    cx.executor().run_until_parked();
10804    cx.update_editor(|editor, window, cx| {
10805        editor.show_completions(
10806            &ShowCompletions {
10807                trigger: Some("\n".into()),
10808            },
10809            window,
10810            cx,
10811        );
10812    });
10813    cx.executor().run_until_parked();
10814
10815    cx.update_editor(|editor, window, cx| {
10816        editor.confirm_completion(&Default::default(), window, cx)
10817    });
10818    cx.executor().run_until_parked();
10819    cx.assert_editor_state("fn a() {}\n  unsafeˇ");
10820}
10821
10822#[gpui::test]
10823async fn test_no_duplicated_completion_requests(cx: &mut TestAppContext) {
10824    init_test(cx, |_| {});
10825
10826    let mut cx = EditorLspTestContext::new_rust(
10827        lsp::ServerCapabilities {
10828            completion_provider: Some(lsp::CompletionOptions {
10829                trigger_characters: Some(vec![".".to_string()]),
10830                resolve_provider: Some(true),
10831                ..Default::default()
10832            }),
10833            ..Default::default()
10834        },
10835        cx,
10836    )
10837    .await;
10838
10839    cx.set_state("fn main() { let a = 2ˇ; }");
10840    cx.simulate_keystroke(".");
10841    let completion_item = lsp::CompletionItem {
10842        label: "Some".into(),
10843        kind: Some(lsp::CompletionItemKind::SNIPPET),
10844        detail: Some("Wrap the expression in an `Option::Some`".to_string()),
10845        documentation: Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
10846            kind: lsp::MarkupKind::Markdown,
10847            value: "```rust\nSome(2)\n```".to_string(),
10848        })),
10849        deprecated: Some(false),
10850        sort_text: Some("Some".to_string()),
10851        filter_text: Some("Some".to_string()),
10852        insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
10853        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10854            range: lsp::Range {
10855                start: lsp::Position {
10856                    line: 0,
10857                    character: 22,
10858                },
10859                end: lsp::Position {
10860                    line: 0,
10861                    character: 22,
10862                },
10863            },
10864            new_text: "Some(2)".to_string(),
10865        })),
10866        additional_text_edits: Some(vec![lsp::TextEdit {
10867            range: lsp::Range {
10868                start: lsp::Position {
10869                    line: 0,
10870                    character: 20,
10871                },
10872                end: lsp::Position {
10873                    line: 0,
10874                    character: 22,
10875                },
10876            },
10877            new_text: "".to_string(),
10878        }]),
10879        ..Default::default()
10880    };
10881
10882    let closure_completion_item = completion_item.clone();
10883    let counter = Arc::new(AtomicUsize::new(0));
10884    let counter_clone = counter.clone();
10885    let mut request = cx.set_request_handler::<lsp::request::Completion, _, _>(move |_, _, _| {
10886        let task_completion_item = closure_completion_item.clone();
10887        counter_clone.fetch_add(1, atomic::Ordering::Release);
10888        async move {
10889            Ok(Some(lsp::CompletionResponse::Array(vec![
10890                task_completion_item,
10891            ])))
10892        }
10893    });
10894
10895    cx.condition(|editor, _| editor.context_menu_visible())
10896        .await;
10897    cx.assert_editor_state("fn main() { let a = 2.ˇ; }");
10898    assert!(request.next().await.is_some());
10899    assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
10900
10901    cx.simulate_keystrokes("S o m");
10902    cx.condition(|editor, _| editor.context_menu_visible())
10903        .await;
10904    cx.assert_editor_state("fn main() { let a = 2.Somˇ; }");
10905    assert!(request.next().await.is_some());
10906    assert!(request.next().await.is_some());
10907    assert!(request.next().await.is_some());
10908    request.close();
10909    assert!(request.next().await.is_none());
10910    assert_eq!(
10911        counter.load(atomic::Ordering::Acquire),
10912        4,
10913        "With the completions menu open, only one LSP request should happen per input"
10914    );
10915}
10916
10917#[gpui::test]
10918async fn test_toggle_comment(cx: &mut TestAppContext) {
10919    init_test(cx, |_| {});
10920    let mut cx = EditorTestContext::new(cx).await;
10921    let language = Arc::new(Language::new(
10922        LanguageConfig {
10923            line_comments: vec!["// ".into(), "//! ".into(), "/// ".into()],
10924            ..Default::default()
10925        },
10926        Some(tree_sitter_rust::LANGUAGE.into()),
10927    ));
10928    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
10929
10930    // If multiple selections intersect a line, the line is only toggled once.
10931    cx.set_state(indoc! {"
10932        fn a() {
10933            «//b();
10934            ˇ»// «c();
10935            //ˇ»  d();
10936        }
10937    "});
10938
10939    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
10940
10941    cx.assert_editor_state(indoc! {"
10942        fn a() {
10943            «b();
10944            c();
10945            ˇ» d();
10946        }
10947    "});
10948
10949    // The comment prefix is inserted at the same column for every line in a
10950    // selection.
10951    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
10952
10953    cx.assert_editor_state(indoc! {"
10954        fn a() {
10955            // «b();
10956            // c();
10957            ˇ»//  d();
10958        }
10959    "});
10960
10961    // If a selection ends at the beginning of a line, that line is not toggled.
10962    cx.set_selections_state(indoc! {"
10963        fn a() {
10964            // b();
10965            «// c();
10966        ˇ»    //  d();
10967        }
10968    "});
10969
10970    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
10971
10972    cx.assert_editor_state(indoc! {"
10973        fn a() {
10974            // b();
10975            «c();
10976        ˇ»    //  d();
10977        }
10978    "});
10979
10980    // If a selection span a single line and is empty, the line is toggled.
10981    cx.set_state(indoc! {"
10982        fn a() {
10983            a();
10984            b();
10985        ˇ
10986        }
10987    "});
10988
10989    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
10990
10991    cx.assert_editor_state(indoc! {"
10992        fn a() {
10993            a();
10994            b();
10995        //•ˇ
10996        }
10997    "});
10998
10999    // If a selection span multiple lines, empty lines are not toggled.
11000    cx.set_state(indoc! {"
11001        fn a() {
11002            «a();
11003
11004            c();ˇ»
11005        }
11006    "});
11007
11008    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
11009
11010    cx.assert_editor_state(indoc! {"
11011        fn a() {
11012            // «a();
11013
11014            // c();ˇ»
11015        }
11016    "});
11017
11018    // If a selection includes multiple comment prefixes, all lines are uncommented.
11019    cx.set_state(indoc! {"
11020        fn a() {
11021            «// a();
11022            /// b();
11023            //! c();ˇ»
11024        }
11025    "});
11026
11027    cx.update_editor(|e, window, cx| e.toggle_comments(&ToggleComments::default(), window, cx));
11028
11029    cx.assert_editor_state(indoc! {"
11030        fn a() {
11031            «a();
11032            b();
11033            c();ˇ»
11034        }
11035    "});
11036}
11037
11038#[gpui::test]
11039async fn test_toggle_comment_ignore_indent(cx: &mut TestAppContext) {
11040    init_test(cx, |_| {});
11041    let mut cx = EditorTestContext::new(cx).await;
11042    let language = Arc::new(Language::new(
11043        LanguageConfig {
11044            line_comments: vec!["// ".into(), "//! ".into(), "/// ".into()],
11045            ..Default::default()
11046        },
11047        Some(tree_sitter_rust::LANGUAGE.into()),
11048    ));
11049    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
11050
11051    let toggle_comments = &ToggleComments {
11052        advance_downwards: false,
11053        ignore_indent: true,
11054    };
11055
11056    // If multiple selections intersect a line, the line is only toggled once.
11057    cx.set_state(indoc! {"
11058        fn a() {
11059        //    «b();
11060        //    c();
11061        //    ˇ» d();
11062        }
11063    "});
11064
11065    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11066
11067    cx.assert_editor_state(indoc! {"
11068        fn a() {
11069            «b();
11070            c();
11071            ˇ» d();
11072        }
11073    "});
11074
11075    // The comment prefix is inserted at the beginning of each line
11076    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11077
11078    cx.assert_editor_state(indoc! {"
11079        fn a() {
11080        //    «b();
11081        //    c();
11082        //    ˇ» d();
11083        }
11084    "});
11085
11086    // If a selection ends at the beginning of a line, that line is not toggled.
11087    cx.set_selections_state(indoc! {"
11088        fn a() {
11089        //    b();
11090        //    «c();
11091        ˇ»//     d();
11092        }
11093    "});
11094
11095    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11096
11097    cx.assert_editor_state(indoc! {"
11098        fn a() {
11099        //    b();
11100            «c();
11101        ˇ»//     d();
11102        }
11103    "});
11104
11105    // If a selection span a single line and is empty, the line is toggled.
11106    cx.set_state(indoc! {"
11107        fn a() {
11108            a();
11109            b();
11110        ˇ
11111        }
11112    "});
11113
11114    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11115
11116    cx.assert_editor_state(indoc! {"
11117        fn a() {
11118            a();
11119            b();
11120        //ˇ
11121        }
11122    "});
11123
11124    // If a selection span multiple lines, empty lines are not toggled.
11125    cx.set_state(indoc! {"
11126        fn a() {
11127            «a();
11128
11129            c();ˇ»
11130        }
11131    "});
11132
11133    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11134
11135    cx.assert_editor_state(indoc! {"
11136        fn a() {
11137        //    «a();
11138
11139        //    c();ˇ»
11140        }
11141    "});
11142
11143    // If a selection includes multiple comment prefixes, all lines are uncommented.
11144    cx.set_state(indoc! {"
11145        fn a() {
11146        //    «a();
11147        ///    b();
11148        //!    c();ˇ»
11149        }
11150    "});
11151
11152    cx.update_editor(|e, window, cx| e.toggle_comments(toggle_comments, window, cx));
11153
11154    cx.assert_editor_state(indoc! {"
11155        fn a() {
11156            «a();
11157            b();
11158            c();ˇ»
11159        }
11160    "});
11161}
11162
11163#[gpui::test]
11164async fn test_advance_downward_on_toggle_comment(cx: &mut TestAppContext) {
11165    init_test(cx, |_| {});
11166
11167    let language = Arc::new(Language::new(
11168        LanguageConfig {
11169            line_comments: vec!["// ".into()],
11170            ..Default::default()
11171        },
11172        Some(tree_sitter_rust::LANGUAGE.into()),
11173    ));
11174
11175    let mut cx = EditorTestContext::new(cx).await;
11176
11177    cx.language_registry().add(language.clone());
11178    cx.update_buffer(|buffer, cx| {
11179        buffer.set_language(Some(language), cx);
11180    });
11181
11182    let toggle_comments = &ToggleComments {
11183        advance_downwards: true,
11184        ignore_indent: false,
11185    };
11186
11187    // Single cursor on one line -> advance
11188    // Cursor moves horizontally 3 characters as well on non-blank line
11189    cx.set_state(indoc!(
11190        "fn a() {
11191             ˇdog();
11192             cat();
11193        }"
11194    ));
11195    cx.update_editor(|editor, window, cx| {
11196        editor.toggle_comments(toggle_comments, window, cx);
11197    });
11198    cx.assert_editor_state(indoc!(
11199        "fn a() {
11200             // dog();
11201             catˇ();
11202        }"
11203    ));
11204
11205    // Single selection on one line -> don't advance
11206    cx.set_state(indoc!(
11207        "fn a() {
11208             «dog()ˇ»;
11209             cat();
11210        }"
11211    ));
11212    cx.update_editor(|editor, window, cx| {
11213        editor.toggle_comments(toggle_comments, window, cx);
11214    });
11215    cx.assert_editor_state(indoc!(
11216        "fn a() {
11217             // «dog()ˇ»;
11218             cat();
11219        }"
11220    ));
11221
11222    // Multiple cursors on one line -> advance
11223    cx.set_state(indoc!(
11224        "fn a() {
11225             ˇdˇog();
11226             cat();
11227        }"
11228    ));
11229    cx.update_editor(|editor, window, cx| {
11230        editor.toggle_comments(toggle_comments, window, cx);
11231    });
11232    cx.assert_editor_state(indoc!(
11233        "fn a() {
11234             // dog();
11235             catˇ(ˇ);
11236        }"
11237    ));
11238
11239    // Multiple cursors on one line, with selection -> don't advance
11240    cx.set_state(indoc!(
11241        "fn a() {
11242             ˇdˇog«()ˇ»;
11243             cat();
11244        }"
11245    ));
11246    cx.update_editor(|editor, window, cx| {
11247        editor.toggle_comments(toggle_comments, window, cx);
11248    });
11249    cx.assert_editor_state(indoc!(
11250        "fn a() {
11251             // ˇdˇog«()ˇ»;
11252             cat();
11253        }"
11254    ));
11255
11256    // Single cursor on one line -> advance
11257    // Cursor moves to column 0 on blank line
11258    cx.set_state(indoc!(
11259        "fn a() {
11260             ˇdog();
11261
11262             cat();
11263        }"
11264    ));
11265    cx.update_editor(|editor, window, cx| {
11266        editor.toggle_comments(toggle_comments, window, cx);
11267    });
11268    cx.assert_editor_state(indoc!(
11269        "fn a() {
11270             // dog();
11271        ˇ
11272             cat();
11273        }"
11274    ));
11275
11276    // Single cursor on one line -> advance
11277    // Cursor starts and ends at column 0
11278    cx.set_state(indoc!(
11279        "fn a() {
11280         ˇ    dog();
11281             cat();
11282        }"
11283    ));
11284    cx.update_editor(|editor, window, cx| {
11285        editor.toggle_comments(toggle_comments, window, cx);
11286    });
11287    cx.assert_editor_state(indoc!(
11288        "fn a() {
11289             // dog();
11290         ˇ    cat();
11291        }"
11292    ));
11293}
11294
11295#[gpui::test]
11296async fn test_toggle_block_comment(cx: &mut TestAppContext) {
11297    init_test(cx, |_| {});
11298
11299    let mut cx = EditorTestContext::new(cx).await;
11300
11301    let html_language = Arc::new(
11302        Language::new(
11303            LanguageConfig {
11304                name: "HTML".into(),
11305                block_comment: Some(("<!-- ".into(), " -->".into())),
11306                ..Default::default()
11307            },
11308            Some(tree_sitter_html::LANGUAGE.into()),
11309        )
11310        .with_injection_query(
11311            r#"
11312            (script_element
11313                (raw_text) @injection.content
11314                (#set! injection.language "javascript"))
11315            "#,
11316        )
11317        .unwrap(),
11318    );
11319
11320    let javascript_language = Arc::new(Language::new(
11321        LanguageConfig {
11322            name: "JavaScript".into(),
11323            line_comments: vec!["// ".into()],
11324            ..Default::default()
11325        },
11326        Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
11327    ));
11328
11329    cx.language_registry().add(html_language.clone());
11330    cx.language_registry().add(javascript_language.clone());
11331    cx.update_buffer(|buffer, cx| {
11332        buffer.set_language(Some(html_language), cx);
11333    });
11334
11335    // Toggle comments for empty selections
11336    cx.set_state(
11337        &r#"
11338            <p>A</p>ˇ
11339            <p>B</p>ˇ
11340            <p>C</p>ˇ
11341        "#
11342        .unindent(),
11343    );
11344    cx.update_editor(|editor, window, cx| {
11345        editor.toggle_comments(&ToggleComments::default(), window, cx)
11346    });
11347    cx.assert_editor_state(
11348        &r#"
11349            <!-- <p>A</p>ˇ -->
11350            <!-- <p>B</p>ˇ -->
11351            <!-- <p>C</p>ˇ -->
11352        "#
11353        .unindent(),
11354    );
11355    cx.update_editor(|editor, window, cx| {
11356        editor.toggle_comments(&ToggleComments::default(), window, cx)
11357    });
11358    cx.assert_editor_state(
11359        &r#"
11360            <p>A</p>ˇ
11361            <p>B</p>ˇ
11362            <p>C</p>ˇ
11363        "#
11364        .unindent(),
11365    );
11366
11367    // Toggle comments for mixture of empty and non-empty selections, where
11368    // multiple selections occupy a given line.
11369    cx.set_state(
11370        &r#"
11371            <p>A«</p>
11372            <p>ˇ»B</p>ˇ
11373            <p>C«</p>
11374            <p>ˇ»D</p>ˇ
11375        "#
11376        .unindent(),
11377    );
11378
11379    cx.update_editor(|editor, window, cx| {
11380        editor.toggle_comments(&ToggleComments::default(), window, cx)
11381    });
11382    cx.assert_editor_state(
11383        &r#"
11384            <!-- <p>A«</p>
11385            <p>ˇ»B</p>ˇ -->
11386            <!-- <p>C«</p>
11387            <p>ˇ»D</p>ˇ -->
11388        "#
11389        .unindent(),
11390    );
11391    cx.update_editor(|editor, window, cx| {
11392        editor.toggle_comments(&ToggleComments::default(), window, cx)
11393    });
11394    cx.assert_editor_state(
11395        &r#"
11396            <p>A«</p>
11397            <p>ˇ»B</p>ˇ
11398            <p>C«</p>
11399            <p>ˇ»D</p>ˇ
11400        "#
11401        .unindent(),
11402    );
11403
11404    // Toggle comments when different languages are active for different
11405    // selections.
11406    cx.set_state(
11407        &r#"
11408            ˇ<script>
11409                ˇvar x = new Y();
11410            ˇ</script>
11411        "#
11412        .unindent(),
11413    );
11414    cx.executor().run_until_parked();
11415    cx.update_editor(|editor, window, cx| {
11416        editor.toggle_comments(&ToggleComments::default(), window, cx)
11417    });
11418    // TODO this is how it actually worked in Zed Stable, which is not very ergonomic.
11419    // Uncommenting and commenting from this position brings in even more wrong artifacts.
11420    cx.assert_editor_state(
11421        &r#"
11422            <!-- ˇ<script> -->
11423                // ˇvar x = new Y();
11424            <!-- ˇ</script> -->
11425        "#
11426        .unindent(),
11427    );
11428}
11429
11430#[gpui::test]
11431fn test_editing_disjoint_excerpts(cx: &mut TestAppContext) {
11432    init_test(cx, |_| {});
11433
11434    let buffer = cx.new(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
11435    let multibuffer = cx.new(|cx| {
11436        let mut multibuffer = MultiBuffer::new(ReadWrite);
11437        multibuffer.push_excerpts(
11438            buffer.clone(),
11439            [
11440                ExcerptRange::new(Point::new(0, 0)..Point::new(0, 4)),
11441                ExcerptRange::new(Point::new(1, 0)..Point::new(1, 4)),
11442            ],
11443            cx,
11444        );
11445        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb");
11446        multibuffer
11447    });
11448
11449    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(multibuffer, window, cx));
11450    editor.update_in(cx, |editor, window, cx| {
11451        assert_eq!(editor.text(cx), "aaaa\nbbbb");
11452        editor.change_selections(None, window, cx, |s| {
11453            s.select_ranges([
11454                Point::new(0, 0)..Point::new(0, 0),
11455                Point::new(1, 0)..Point::new(1, 0),
11456            ])
11457        });
11458
11459        editor.handle_input("X", window, cx);
11460        assert_eq!(editor.text(cx), "Xaaaa\nXbbbb");
11461        assert_eq!(
11462            editor.selections.ranges(cx),
11463            [
11464                Point::new(0, 1)..Point::new(0, 1),
11465                Point::new(1, 1)..Point::new(1, 1),
11466            ]
11467        );
11468
11469        // Ensure the cursor's head is respected when deleting across an excerpt boundary.
11470        editor.change_selections(None, window, cx, |s| {
11471            s.select_ranges([Point::new(0, 2)..Point::new(1, 2)])
11472        });
11473        editor.backspace(&Default::default(), window, cx);
11474        assert_eq!(editor.text(cx), "Xa\nbbb");
11475        assert_eq!(
11476            editor.selections.ranges(cx),
11477            [Point::new(1, 0)..Point::new(1, 0)]
11478        );
11479
11480        editor.change_selections(None, window, cx, |s| {
11481            s.select_ranges([Point::new(1, 1)..Point::new(0, 1)])
11482        });
11483        editor.backspace(&Default::default(), window, cx);
11484        assert_eq!(editor.text(cx), "X\nbb");
11485        assert_eq!(
11486            editor.selections.ranges(cx),
11487            [Point::new(0, 1)..Point::new(0, 1)]
11488        );
11489    });
11490}
11491
11492#[gpui::test]
11493fn test_editing_overlapping_excerpts(cx: &mut TestAppContext) {
11494    init_test(cx, |_| {});
11495
11496    let markers = vec![('[', ']').into(), ('(', ')').into()];
11497    let (initial_text, mut excerpt_ranges) = marked_text_ranges_by(
11498        indoc! {"
11499            [aaaa
11500            (bbbb]
11501            cccc)",
11502        },
11503        markers.clone(),
11504    );
11505    let excerpt_ranges = markers.into_iter().map(|marker| {
11506        let context = excerpt_ranges.remove(&marker).unwrap()[0].clone();
11507        ExcerptRange::new(context.clone())
11508    });
11509    let buffer = cx.new(|cx| Buffer::local(initial_text, cx));
11510    let multibuffer = cx.new(|cx| {
11511        let mut multibuffer = MultiBuffer::new(ReadWrite);
11512        multibuffer.push_excerpts(buffer, excerpt_ranges, cx);
11513        multibuffer
11514    });
11515
11516    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(multibuffer, window, cx));
11517    editor.update_in(cx, |editor, window, cx| {
11518        let (expected_text, selection_ranges) = marked_text_ranges(
11519            indoc! {"
11520                aaaa
11521                bˇbbb
11522                bˇbbˇb
11523                cccc"
11524            },
11525            true,
11526        );
11527        assert_eq!(editor.text(cx), expected_text);
11528        editor.change_selections(None, window, cx, |s| s.select_ranges(selection_ranges));
11529
11530        editor.handle_input("X", window, cx);
11531
11532        let (expected_text, expected_selections) = marked_text_ranges(
11533            indoc! {"
11534                aaaa
11535                bXˇbbXb
11536                bXˇbbXˇb
11537                cccc"
11538            },
11539            false,
11540        );
11541        assert_eq!(editor.text(cx), expected_text);
11542        assert_eq!(editor.selections.ranges(cx), expected_selections);
11543
11544        editor.newline(&Newline, window, cx);
11545        let (expected_text, expected_selections) = marked_text_ranges(
11546            indoc! {"
11547                aaaa
11548                bX
11549                ˇbbX
11550                b
11551                bX
11552                ˇbbX
11553                ˇb
11554                cccc"
11555            },
11556            false,
11557        );
11558        assert_eq!(editor.text(cx), expected_text);
11559        assert_eq!(editor.selections.ranges(cx), expected_selections);
11560    });
11561}
11562
11563#[gpui::test]
11564fn test_refresh_selections(cx: &mut TestAppContext) {
11565    init_test(cx, |_| {});
11566
11567    let buffer = cx.new(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
11568    let mut excerpt1_id = None;
11569    let multibuffer = cx.new(|cx| {
11570        let mut multibuffer = MultiBuffer::new(ReadWrite);
11571        excerpt1_id = multibuffer
11572            .push_excerpts(
11573                buffer.clone(),
11574                [
11575                    ExcerptRange::new(Point::new(0, 0)..Point::new(1, 4)),
11576                    ExcerptRange::new(Point::new(1, 0)..Point::new(2, 4)),
11577                ],
11578                cx,
11579            )
11580            .into_iter()
11581            .next();
11582        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb\nbbbb\ncccc");
11583        multibuffer
11584    });
11585
11586    let editor = cx.add_window(|window, cx| {
11587        let mut editor = build_editor(multibuffer.clone(), window, cx);
11588        let snapshot = editor.snapshot(window, cx);
11589        editor.change_selections(None, window, cx, |s| {
11590            s.select_ranges([Point::new(1, 3)..Point::new(1, 3)])
11591        });
11592        editor.begin_selection(
11593            Point::new(2, 1).to_display_point(&snapshot),
11594            true,
11595            1,
11596            window,
11597            cx,
11598        );
11599        assert_eq!(
11600            editor.selections.ranges(cx),
11601            [
11602                Point::new(1, 3)..Point::new(1, 3),
11603                Point::new(2, 1)..Point::new(2, 1),
11604            ]
11605        );
11606        editor
11607    });
11608
11609    // Refreshing selections is a no-op when excerpts haven't changed.
11610    _ = editor.update(cx, |editor, window, cx| {
11611        editor.change_selections(None, window, cx, |s| s.refresh());
11612        assert_eq!(
11613            editor.selections.ranges(cx),
11614            [
11615                Point::new(1, 3)..Point::new(1, 3),
11616                Point::new(2, 1)..Point::new(2, 1),
11617            ]
11618        );
11619    });
11620
11621    multibuffer.update(cx, |multibuffer, cx| {
11622        multibuffer.remove_excerpts([excerpt1_id.unwrap()], cx);
11623    });
11624    _ = editor.update(cx, |editor, window, cx| {
11625        // Removing an excerpt causes the first selection to become degenerate.
11626        assert_eq!(
11627            editor.selections.ranges(cx),
11628            [
11629                Point::new(0, 0)..Point::new(0, 0),
11630                Point::new(0, 1)..Point::new(0, 1)
11631            ]
11632        );
11633
11634        // Refreshing selections will relocate the first selection to the original buffer
11635        // location.
11636        editor.change_selections(None, window, cx, |s| s.refresh());
11637        assert_eq!(
11638            editor.selections.ranges(cx),
11639            [
11640                Point::new(0, 1)..Point::new(0, 1),
11641                Point::new(0, 3)..Point::new(0, 3)
11642            ]
11643        );
11644        assert!(editor.selections.pending_anchor().is_some());
11645    });
11646}
11647
11648#[gpui::test]
11649fn test_refresh_selections_while_selecting_with_mouse(cx: &mut TestAppContext) {
11650    init_test(cx, |_| {});
11651
11652    let buffer = cx.new(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
11653    let mut excerpt1_id = None;
11654    let multibuffer = cx.new(|cx| {
11655        let mut multibuffer = MultiBuffer::new(ReadWrite);
11656        excerpt1_id = multibuffer
11657            .push_excerpts(
11658                buffer.clone(),
11659                [
11660                    ExcerptRange::new(Point::new(0, 0)..Point::new(1, 4)),
11661                    ExcerptRange::new(Point::new(1, 0)..Point::new(2, 4)),
11662                ],
11663                cx,
11664            )
11665            .into_iter()
11666            .next();
11667        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb\nbbbb\ncccc");
11668        multibuffer
11669    });
11670
11671    let editor = cx.add_window(|window, cx| {
11672        let mut editor = build_editor(multibuffer.clone(), window, cx);
11673        let snapshot = editor.snapshot(window, cx);
11674        editor.begin_selection(
11675            Point::new(1, 3).to_display_point(&snapshot),
11676            false,
11677            1,
11678            window,
11679            cx,
11680        );
11681        assert_eq!(
11682            editor.selections.ranges(cx),
11683            [Point::new(1, 3)..Point::new(1, 3)]
11684        );
11685        editor
11686    });
11687
11688    multibuffer.update(cx, |multibuffer, cx| {
11689        multibuffer.remove_excerpts([excerpt1_id.unwrap()], cx);
11690    });
11691    _ = editor.update(cx, |editor, window, cx| {
11692        assert_eq!(
11693            editor.selections.ranges(cx),
11694            [Point::new(0, 0)..Point::new(0, 0)]
11695        );
11696
11697        // Ensure we don't panic when selections are refreshed and that the pending selection is finalized.
11698        editor.change_selections(None, window, cx, |s| s.refresh());
11699        assert_eq!(
11700            editor.selections.ranges(cx),
11701            [Point::new(0, 3)..Point::new(0, 3)]
11702        );
11703        assert!(editor.selections.pending_anchor().is_some());
11704    });
11705}
11706
11707#[gpui::test]
11708async fn test_extra_newline_insertion(cx: &mut TestAppContext) {
11709    init_test(cx, |_| {});
11710
11711    let language = Arc::new(
11712        Language::new(
11713            LanguageConfig {
11714                brackets: BracketPairConfig {
11715                    pairs: vec![
11716                        BracketPair {
11717                            start: "{".to_string(),
11718                            end: "}".to_string(),
11719                            close: true,
11720                            surround: true,
11721                            newline: true,
11722                        },
11723                        BracketPair {
11724                            start: "/* ".to_string(),
11725                            end: " */".to_string(),
11726                            close: true,
11727                            surround: true,
11728                            newline: true,
11729                        },
11730                    ],
11731                    ..Default::default()
11732                },
11733                ..Default::default()
11734            },
11735            Some(tree_sitter_rust::LANGUAGE.into()),
11736        )
11737        .with_indents_query("")
11738        .unwrap(),
11739    );
11740
11741    let text = concat!(
11742        "{   }\n",     //
11743        "  x\n",       //
11744        "  /*   */\n", //
11745        "x\n",         //
11746        "{{} }\n",     //
11747    );
11748
11749    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
11750    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
11751    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
11752    editor
11753        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
11754        .await;
11755
11756    editor.update_in(cx, |editor, window, cx| {
11757        editor.change_selections(None, window, cx, |s| {
11758            s.select_display_ranges([
11759                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 3),
11760                DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),
11761                DisplayPoint::new(DisplayRow(4), 4)..DisplayPoint::new(DisplayRow(4), 4),
11762            ])
11763        });
11764        editor.newline(&Newline, window, cx);
11765
11766        assert_eq!(
11767            editor.buffer().read(cx).read(cx).text(),
11768            concat!(
11769                "{ \n",    // Suppress rustfmt
11770                "\n",      //
11771                "}\n",     //
11772                "  x\n",   //
11773                "  /* \n", //
11774                "  \n",    //
11775                "  */\n",  //
11776                "x\n",     //
11777                "{{} \n",  //
11778                "}\n",     //
11779            )
11780        );
11781    });
11782}
11783
11784#[gpui::test]
11785fn test_highlighted_ranges(cx: &mut TestAppContext) {
11786    init_test(cx, |_| {});
11787
11788    let editor = cx.add_window(|window, cx| {
11789        let buffer = MultiBuffer::build_simple(&sample_text(16, 8, 'a'), cx);
11790        build_editor(buffer.clone(), window, cx)
11791    });
11792
11793    _ = editor.update(cx, |editor, window, cx| {
11794        struct Type1;
11795        struct Type2;
11796
11797        let buffer = editor.buffer.read(cx).snapshot(cx);
11798
11799        let anchor_range =
11800            |range: Range<Point>| buffer.anchor_after(range.start)..buffer.anchor_after(range.end);
11801
11802        editor.highlight_background::<Type1>(
11803            &[
11804                anchor_range(Point::new(2, 1)..Point::new(2, 3)),
11805                anchor_range(Point::new(4, 2)..Point::new(4, 4)),
11806                anchor_range(Point::new(6, 3)..Point::new(6, 5)),
11807                anchor_range(Point::new(8, 4)..Point::new(8, 6)),
11808            ],
11809            |_| Hsla::red(),
11810            cx,
11811        );
11812        editor.highlight_background::<Type2>(
11813            &[
11814                anchor_range(Point::new(3, 2)..Point::new(3, 5)),
11815                anchor_range(Point::new(5, 3)..Point::new(5, 6)),
11816                anchor_range(Point::new(7, 4)..Point::new(7, 7)),
11817                anchor_range(Point::new(9, 5)..Point::new(9, 8)),
11818            ],
11819            |_| Hsla::green(),
11820            cx,
11821        );
11822
11823        let snapshot = editor.snapshot(window, cx);
11824        let mut highlighted_ranges = editor.background_highlights_in_range(
11825            anchor_range(Point::new(3, 4)..Point::new(7, 4)),
11826            &snapshot,
11827            cx.theme().colors(),
11828        );
11829        // Enforce a consistent ordering based on color without relying on the ordering of the
11830        // highlight's `TypeId` which is non-executor.
11831        highlighted_ranges.sort_unstable_by_key(|(_, color)| *color);
11832        assert_eq!(
11833            highlighted_ranges,
11834            &[
11835                (
11836                    DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(4), 4),
11837                    Hsla::red(),
11838                ),
11839                (
11840                    DisplayPoint::new(DisplayRow(6), 3)..DisplayPoint::new(DisplayRow(6), 5),
11841                    Hsla::red(),
11842                ),
11843                (
11844                    DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 5),
11845                    Hsla::green(),
11846                ),
11847                (
11848                    DisplayPoint::new(DisplayRow(5), 3)..DisplayPoint::new(DisplayRow(5), 6),
11849                    Hsla::green(),
11850                ),
11851            ]
11852        );
11853        assert_eq!(
11854            editor.background_highlights_in_range(
11855                anchor_range(Point::new(5, 6)..Point::new(6, 4)),
11856                &snapshot,
11857                cx.theme().colors(),
11858            ),
11859            &[(
11860                DisplayPoint::new(DisplayRow(6), 3)..DisplayPoint::new(DisplayRow(6), 5),
11861                Hsla::red(),
11862            )]
11863        );
11864    });
11865}
11866
11867#[gpui::test]
11868async fn test_following(cx: &mut TestAppContext) {
11869    init_test(cx, |_| {});
11870
11871    let fs = FakeFs::new(cx.executor());
11872    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
11873
11874    let buffer = project.update(cx, |project, cx| {
11875        let buffer = project.create_local_buffer(&sample_text(16, 8, 'a'), None, cx);
11876        cx.new(|cx| MultiBuffer::singleton(buffer, cx))
11877    });
11878    let leader = cx.add_window(|window, cx| build_editor(buffer.clone(), window, cx));
11879    let follower = cx.update(|cx| {
11880        cx.open_window(
11881            WindowOptions {
11882                window_bounds: Some(WindowBounds::Windowed(Bounds::from_corners(
11883                    gpui::Point::new(px(0.), px(0.)),
11884                    gpui::Point::new(px(10.), px(80.)),
11885                ))),
11886                ..Default::default()
11887            },
11888            |window, cx| cx.new(|cx| build_editor(buffer.clone(), window, cx)),
11889        )
11890        .unwrap()
11891    });
11892
11893    let is_still_following = Rc::new(RefCell::new(true));
11894    let follower_edit_event_count = Rc::new(RefCell::new(0));
11895    let pending_update = Rc::new(RefCell::new(None));
11896    let leader_entity = leader.root(cx).unwrap();
11897    let follower_entity = follower.root(cx).unwrap();
11898    _ = follower.update(cx, {
11899        let update = pending_update.clone();
11900        let is_still_following = is_still_following.clone();
11901        let follower_edit_event_count = follower_edit_event_count.clone();
11902        |_, window, cx| {
11903            cx.subscribe_in(
11904                &leader_entity,
11905                window,
11906                move |_, leader, event, window, cx| {
11907                    leader.read(cx).add_event_to_update_proto(
11908                        event,
11909                        &mut update.borrow_mut(),
11910                        window,
11911                        cx,
11912                    );
11913                },
11914            )
11915            .detach();
11916
11917            cx.subscribe_in(
11918                &follower_entity,
11919                window,
11920                move |_, _, event: &EditorEvent, _window, _cx| {
11921                    if matches!(Editor::to_follow_event(event), Some(FollowEvent::Unfollow)) {
11922                        *is_still_following.borrow_mut() = false;
11923                    }
11924
11925                    if let EditorEvent::BufferEdited = event {
11926                        *follower_edit_event_count.borrow_mut() += 1;
11927                    }
11928                },
11929            )
11930            .detach();
11931        }
11932    });
11933
11934    // Update the selections only
11935    _ = leader.update(cx, |leader, window, cx| {
11936        leader.change_selections(None, window, cx, |s| s.select_ranges([1..1]));
11937    });
11938    follower
11939        .update(cx, |follower, window, cx| {
11940            follower.apply_update_proto(
11941                &project,
11942                pending_update.borrow_mut().take().unwrap(),
11943                window,
11944                cx,
11945            )
11946        })
11947        .unwrap()
11948        .await
11949        .unwrap();
11950    _ = follower.update(cx, |follower, _, cx| {
11951        assert_eq!(follower.selections.ranges(cx), vec![1..1]);
11952    });
11953    assert!(*is_still_following.borrow());
11954    assert_eq!(*follower_edit_event_count.borrow(), 0);
11955
11956    // Update the scroll position only
11957    _ = leader.update(cx, |leader, window, cx| {
11958        leader.set_scroll_position(gpui::Point::new(1.5, 3.5), window, cx);
11959    });
11960    follower
11961        .update(cx, |follower, window, cx| {
11962            follower.apply_update_proto(
11963                &project,
11964                pending_update.borrow_mut().take().unwrap(),
11965                window,
11966                cx,
11967            )
11968        })
11969        .unwrap()
11970        .await
11971        .unwrap();
11972    assert_eq!(
11973        follower
11974            .update(cx, |follower, _, cx| follower.scroll_position(cx))
11975            .unwrap(),
11976        gpui::Point::new(1.5, 3.5)
11977    );
11978    assert!(*is_still_following.borrow());
11979    assert_eq!(*follower_edit_event_count.borrow(), 0);
11980
11981    // Update the selections and scroll position. The follower's scroll position is updated
11982    // via autoscroll, not via the leader's exact scroll position.
11983    _ = leader.update(cx, |leader, window, cx| {
11984        leader.change_selections(None, window, cx, |s| s.select_ranges([0..0]));
11985        leader.request_autoscroll(Autoscroll::newest(), cx);
11986        leader.set_scroll_position(gpui::Point::new(1.5, 3.5), window, cx);
11987    });
11988    follower
11989        .update(cx, |follower, window, cx| {
11990            follower.apply_update_proto(
11991                &project,
11992                pending_update.borrow_mut().take().unwrap(),
11993                window,
11994                cx,
11995            )
11996        })
11997        .unwrap()
11998        .await
11999        .unwrap();
12000    _ = follower.update(cx, |follower, _, cx| {
12001        assert_eq!(follower.scroll_position(cx), gpui::Point::new(1.5, 0.0));
12002        assert_eq!(follower.selections.ranges(cx), vec![0..0]);
12003    });
12004    assert!(*is_still_following.borrow());
12005
12006    // Creating a pending selection that precedes another selection
12007    _ = leader.update(cx, |leader, window, cx| {
12008        leader.change_selections(None, window, cx, |s| s.select_ranges([1..1]));
12009        leader.begin_selection(DisplayPoint::new(DisplayRow(0), 0), true, 1, window, cx);
12010    });
12011    follower
12012        .update(cx, |follower, window, cx| {
12013            follower.apply_update_proto(
12014                &project,
12015                pending_update.borrow_mut().take().unwrap(),
12016                window,
12017                cx,
12018            )
12019        })
12020        .unwrap()
12021        .await
12022        .unwrap();
12023    _ = follower.update(cx, |follower, _, cx| {
12024        assert_eq!(follower.selections.ranges(cx), vec![0..0, 1..1]);
12025    });
12026    assert!(*is_still_following.borrow());
12027
12028    // Extend the pending selection so that it surrounds another selection
12029    _ = leader.update(cx, |leader, window, cx| {
12030        leader.extend_selection(DisplayPoint::new(DisplayRow(0), 2), 1, window, cx);
12031    });
12032    follower
12033        .update(cx, |follower, window, cx| {
12034            follower.apply_update_proto(
12035                &project,
12036                pending_update.borrow_mut().take().unwrap(),
12037                window,
12038                cx,
12039            )
12040        })
12041        .unwrap()
12042        .await
12043        .unwrap();
12044    _ = follower.update(cx, |follower, _, cx| {
12045        assert_eq!(follower.selections.ranges(cx), vec![0..2]);
12046    });
12047
12048    // Scrolling locally breaks the follow
12049    _ = follower.update(cx, |follower, window, cx| {
12050        let top_anchor = follower.buffer().read(cx).read(cx).anchor_after(0);
12051        follower.set_scroll_anchor(
12052            ScrollAnchor {
12053                anchor: top_anchor,
12054                offset: gpui::Point::new(0.0, 0.5),
12055            },
12056            window,
12057            cx,
12058        );
12059    });
12060    assert!(!(*is_still_following.borrow()));
12061}
12062
12063#[gpui::test]
12064async fn test_following_with_multiple_excerpts(cx: &mut TestAppContext) {
12065    init_test(cx, |_| {});
12066
12067    let fs = FakeFs::new(cx.executor());
12068    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
12069    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
12070    let pane = workspace
12071        .update(cx, |workspace, _, _| workspace.active_pane().clone())
12072        .unwrap();
12073
12074    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
12075
12076    let leader = pane.update_in(cx, |_, window, cx| {
12077        let multibuffer = cx.new(|_| MultiBuffer::new(ReadWrite));
12078        cx.new(|cx| build_editor(multibuffer.clone(), window, cx))
12079    });
12080
12081    // Start following the editor when it has no excerpts.
12082    let mut state_message =
12083        leader.update_in(cx, |leader, window, cx| leader.to_state_proto(window, cx));
12084    let workspace_entity = workspace.root(cx).unwrap();
12085    let follower_1 = cx
12086        .update_window(*workspace.deref(), |_, window, cx| {
12087            Editor::from_state_proto(
12088                workspace_entity,
12089                ViewId {
12090                    creator: Default::default(),
12091                    id: 0,
12092                },
12093                &mut state_message,
12094                window,
12095                cx,
12096            )
12097        })
12098        .unwrap()
12099        .unwrap()
12100        .await
12101        .unwrap();
12102
12103    let update_message = Rc::new(RefCell::new(None));
12104    follower_1.update_in(cx, {
12105        let update = update_message.clone();
12106        |_, window, cx| {
12107            cx.subscribe_in(&leader, window, move |_, leader, event, window, cx| {
12108                leader.read(cx).add_event_to_update_proto(
12109                    event,
12110                    &mut update.borrow_mut(),
12111                    window,
12112                    cx,
12113                );
12114            })
12115            .detach();
12116        }
12117    });
12118
12119    let (buffer_1, buffer_2) = project.update(cx, |project, cx| {
12120        (
12121            project.create_local_buffer("abc\ndef\nghi\njkl\n", None, cx),
12122            project.create_local_buffer("mno\npqr\nstu\nvwx\n", None, cx),
12123        )
12124    });
12125
12126    // Insert some excerpts.
12127    leader.update(cx, |leader, cx| {
12128        leader.buffer.update(cx, |multibuffer, cx| {
12129            let excerpt_ids = multibuffer.push_excerpts(
12130                buffer_1.clone(),
12131                [
12132                    ExcerptRange::new(1..6),
12133                    ExcerptRange::new(12..15),
12134                    ExcerptRange::new(0..3),
12135                ],
12136                cx,
12137            );
12138            multibuffer.insert_excerpts_after(
12139                excerpt_ids[0],
12140                buffer_2.clone(),
12141                [ExcerptRange::new(8..12), ExcerptRange::new(0..6)],
12142                cx,
12143            );
12144        });
12145    });
12146
12147    // Apply the update of adding the excerpts.
12148    follower_1
12149        .update_in(cx, |follower, window, cx| {
12150            follower.apply_update_proto(
12151                &project,
12152                update_message.borrow().clone().unwrap(),
12153                window,
12154                cx,
12155            )
12156        })
12157        .await
12158        .unwrap();
12159    assert_eq!(
12160        follower_1.update(cx, |editor, cx| editor.text(cx)),
12161        leader.update(cx, |editor, cx| editor.text(cx))
12162    );
12163    update_message.borrow_mut().take();
12164
12165    // Start following separately after it already has excerpts.
12166    let mut state_message =
12167        leader.update_in(cx, |leader, window, cx| leader.to_state_proto(window, cx));
12168    let workspace_entity = workspace.root(cx).unwrap();
12169    let follower_2 = cx
12170        .update_window(*workspace.deref(), |_, window, cx| {
12171            Editor::from_state_proto(
12172                workspace_entity,
12173                ViewId {
12174                    creator: Default::default(),
12175                    id: 0,
12176                },
12177                &mut state_message,
12178                window,
12179                cx,
12180            )
12181        })
12182        .unwrap()
12183        .unwrap()
12184        .await
12185        .unwrap();
12186    assert_eq!(
12187        follower_2.update(cx, |editor, cx| editor.text(cx)),
12188        leader.update(cx, |editor, cx| editor.text(cx))
12189    );
12190
12191    // Remove some excerpts.
12192    leader.update(cx, |leader, cx| {
12193        leader.buffer.update(cx, |multibuffer, cx| {
12194            let excerpt_ids = multibuffer.excerpt_ids();
12195            multibuffer.remove_excerpts([excerpt_ids[1], excerpt_ids[2]], cx);
12196            multibuffer.remove_excerpts([excerpt_ids[0]], cx);
12197        });
12198    });
12199
12200    // Apply the update of removing the excerpts.
12201    follower_1
12202        .update_in(cx, |follower, window, cx| {
12203            follower.apply_update_proto(
12204                &project,
12205                update_message.borrow().clone().unwrap(),
12206                window,
12207                cx,
12208            )
12209        })
12210        .await
12211        .unwrap();
12212    follower_2
12213        .update_in(cx, |follower, window, cx| {
12214            follower.apply_update_proto(
12215                &project,
12216                update_message.borrow().clone().unwrap(),
12217                window,
12218                cx,
12219            )
12220        })
12221        .await
12222        .unwrap();
12223    update_message.borrow_mut().take();
12224    assert_eq!(
12225        follower_1.update(cx, |editor, cx| editor.text(cx)),
12226        leader.update(cx, |editor, cx| editor.text(cx))
12227    );
12228}
12229
12230#[gpui::test]
12231async fn go_to_prev_overlapping_diagnostic(executor: BackgroundExecutor, cx: &mut TestAppContext) {
12232    init_test(cx, |_| {});
12233
12234    let mut cx = EditorTestContext::new(cx).await;
12235    let lsp_store =
12236        cx.update_editor(|editor, _, cx| editor.project.as_ref().unwrap().read(cx).lsp_store());
12237
12238    cx.set_state(indoc! {"
12239        ˇfn func(abc def: i32) -> u32 {
12240        }
12241    "});
12242
12243    cx.update(|_, cx| {
12244        lsp_store.update(cx, |lsp_store, cx| {
12245            lsp_store
12246                .update_diagnostics(
12247                    LanguageServerId(0),
12248                    lsp::PublishDiagnosticsParams {
12249                        uri: lsp::Url::from_file_path(path!("/root/file")).unwrap(),
12250                        version: None,
12251                        diagnostics: vec![
12252                            lsp::Diagnostic {
12253                                range: lsp::Range::new(
12254                                    lsp::Position::new(0, 11),
12255                                    lsp::Position::new(0, 12),
12256                                ),
12257                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12258                                ..Default::default()
12259                            },
12260                            lsp::Diagnostic {
12261                                range: lsp::Range::new(
12262                                    lsp::Position::new(0, 12),
12263                                    lsp::Position::new(0, 15),
12264                                ),
12265                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12266                                ..Default::default()
12267                            },
12268                            lsp::Diagnostic {
12269                                range: lsp::Range::new(
12270                                    lsp::Position::new(0, 25),
12271                                    lsp::Position::new(0, 28),
12272                                ),
12273                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12274                                ..Default::default()
12275                            },
12276                        ],
12277                    },
12278                    &[],
12279                    cx,
12280                )
12281                .unwrap()
12282        });
12283    });
12284
12285    executor.run_until_parked();
12286
12287    cx.update_editor(|editor, window, cx| {
12288        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12289    });
12290
12291    cx.assert_editor_state(indoc! {"
12292        fn func(abc def: i32) -> ˇu32 {
12293        }
12294    "});
12295
12296    cx.update_editor(|editor, window, cx| {
12297        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12298    });
12299
12300    cx.assert_editor_state(indoc! {"
12301        fn func(abc ˇdef: i32) -> u32 {
12302        }
12303    "});
12304
12305    cx.update_editor(|editor, window, cx| {
12306        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12307    });
12308
12309    cx.assert_editor_state(indoc! {"
12310        fn func(abcˇ def: i32) -> u32 {
12311        }
12312    "});
12313
12314    cx.update_editor(|editor, window, cx| {
12315        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12316    });
12317
12318    cx.assert_editor_state(indoc! {"
12319        fn func(abc def: i32) -> ˇu32 {
12320        }
12321    "});
12322}
12323
12324#[gpui::test]
12325async fn cycle_through_same_place_diagnostics(
12326    executor: BackgroundExecutor,
12327    cx: &mut TestAppContext,
12328) {
12329    init_test(cx, |_| {});
12330
12331    let mut cx = EditorTestContext::new(cx).await;
12332    let lsp_store =
12333        cx.update_editor(|editor, _, cx| editor.project.as_ref().unwrap().read(cx).lsp_store());
12334
12335    cx.set_state(indoc! {"
12336        ˇfn func(abc def: i32) -> u32 {
12337        }
12338    "});
12339
12340    cx.update(|_, cx| {
12341        lsp_store.update(cx, |lsp_store, cx| {
12342            lsp_store
12343                .update_diagnostics(
12344                    LanguageServerId(0),
12345                    lsp::PublishDiagnosticsParams {
12346                        uri: lsp::Url::from_file_path(path!("/root/file")).unwrap(),
12347                        version: None,
12348                        diagnostics: vec![
12349                            lsp::Diagnostic {
12350                                range: lsp::Range::new(
12351                                    lsp::Position::new(0, 11),
12352                                    lsp::Position::new(0, 12),
12353                                ),
12354                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12355                                ..Default::default()
12356                            },
12357                            lsp::Diagnostic {
12358                                range: lsp::Range::new(
12359                                    lsp::Position::new(0, 12),
12360                                    lsp::Position::new(0, 15),
12361                                ),
12362                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12363                                ..Default::default()
12364                            },
12365                            lsp::Diagnostic {
12366                                range: lsp::Range::new(
12367                                    lsp::Position::new(0, 12),
12368                                    lsp::Position::new(0, 15),
12369                                ),
12370                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12371                                ..Default::default()
12372                            },
12373                            lsp::Diagnostic {
12374                                range: lsp::Range::new(
12375                                    lsp::Position::new(0, 25),
12376                                    lsp::Position::new(0, 28),
12377                                ),
12378                                severity: Some(lsp::DiagnosticSeverity::ERROR),
12379                                ..Default::default()
12380                            },
12381                        ],
12382                    },
12383                    &[],
12384                    cx,
12385                )
12386                .unwrap()
12387        });
12388    });
12389    executor.run_until_parked();
12390
12391    //// Backward
12392
12393    // Fourth diagnostic
12394    cx.update_editor(|editor, window, cx| {
12395        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12396    });
12397    cx.assert_editor_state(indoc! {"
12398        fn func(abc def: i32) -> ˇu32 {
12399        }
12400    "});
12401
12402    // Third diagnostic
12403    cx.update_editor(|editor, window, cx| {
12404        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12405    });
12406    cx.assert_editor_state(indoc! {"
12407        fn func(abc ˇdef: i32) -> u32 {
12408        }
12409    "});
12410
12411    // Second diagnostic, same place
12412    cx.update_editor(|editor, window, cx| {
12413        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12414    });
12415    cx.assert_editor_state(indoc! {"
12416        fn func(abc ˇdef: i32) -> u32 {
12417        }
12418    "});
12419
12420    // First diagnostic
12421    cx.update_editor(|editor, window, cx| {
12422        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12423    });
12424    cx.assert_editor_state(indoc! {"
12425        fn func(abcˇ def: i32) -> u32 {
12426        }
12427    "});
12428
12429    // Wrapped over, fourth diagnostic
12430    cx.update_editor(|editor, window, cx| {
12431        editor.go_to_prev_diagnostic(&GoToPreviousDiagnostic, window, cx);
12432    });
12433    cx.assert_editor_state(indoc! {"
12434        fn func(abc def: i32) -> ˇu32 {
12435        }
12436    "});
12437
12438    cx.update_editor(|editor, window, cx| {
12439        editor.move_to_beginning(&MoveToBeginning, window, cx);
12440    });
12441    cx.assert_editor_state(indoc! {"
12442        ˇfn func(abc def: i32) -> u32 {
12443        }
12444    "});
12445
12446    //// Forward
12447
12448    // First diagnostic
12449    cx.update_editor(|editor, window, cx| {
12450        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12451    });
12452    cx.assert_editor_state(indoc! {"
12453        fn func(abcˇ def: i32) -> u32 {
12454        }
12455    "});
12456
12457    // Second diagnostic
12458    cx.update_editor(|editor, window, cx| {
12459        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12460    });
12461    cx.assert_editor_state(indoc! {"
12462        fn func(abc ˇdef: i32) -> u32 {
12463        }
12464    "});
12465
12466    // Third diagnostic, same place
12467    cx.update_editor(|editor, window, cx| {
12468        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12469    });
12470    cx.assert_editor_state(indoc! {"
12471        fn func(abc ˇdef: i32) -> u32 {
12472        }
12473    "});
12474
12475    // Fourth diagnostic
12476    cx.update_editor(|editor, window, cx| {
12477        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12478    });
12479    cx.assert_editor_state(indoc! {"
12480        fn func(abc def: i32) -> ˇu32 {
12481        }
12482    "});
12483
12484    // Wrapped around, first diagnostic
12485    cx.update_editor(|editor, window, cx| {
12486        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12487    });
12488    cx.assert_editor_state(indoc! {"
12489        fn func(abcˇ def: i32) -> u32 {
12490        }
12491    "});
12492}
12493
12494#[gpui::test]
12495async fn active_diagnostics_dismiss_after_invalidation(
12496    executor: BackgroundExecutor,
12497    cx: &mut TestAppContext,
12498) {
12499    init_test(cx, |_| {});
12500
12501    let mut cx = EditorTestContext::new(cx).await;
12502    let lsp_store =
12503        cx.update_editor(|editor, _, cx| editor.project.as_ref().unwrap().read(cx).lsp_store());
12504
12505    cx.set_state(indoc! {"
12506        ˇfn func(abc def: i32) -> u32 {
12507        }
12508    "});
12509
12510    let message = "Something's wrong!";
12511    cx.update(|_, cx| {
12512        lsp_store.update(cx, |lsp_store, cx| {
12513            lsp_store
12514                .update_diagnostics(
12515                    LanguageServerId(0),
12516                    lsp::PublishDiagnosticsParams {
12517                        uri: lsp::Url::from_file_path(path!("/root/file")).unwrap(),
12518                        version: None,
12519                        diagnostics: vec![lsp::Diagnostic {
12520                            range: lsp::Range::new(
12521                                lsp::Position::new(0, 11),
12522                                lsp::Position::new(0, 12),
12523                            ),
12524                            severity: Some(lsp::DiagnosticSeverity::ERROR),
12525                            message: message.to_string(),
12526                            ..Default::default()
12527                        }],
12528                    },
12529                    &[],
12530                    cx,
12531                )
12532                .unwrap()
12533        });
12534    });
12535    executor.run_until_parked();
12536
12537    cx.update_editor(|editor, window, cx| {
12538        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12539        assert_eq!(
12540            editor
12541                .active_diagnostics
12542                .as_ref()
12543                .map(|diagnostics_group| diagnostics_group.primary_message.as_str()),
12544            Some(message),
12545            "Should have a diagnostics group activated"
12546        );
12547    });
12548    cx.assert_editor_state(indoc! {"
12549        fn func(abcˇ def: i32) -> u32 {
12550        }
12551    "});
12552
12553    cx.update(|_, cx| {
12554        lsp_store.update(cx, |lsp_store, cx| {
12555            lsp_store
12556                .update_diagnostics(
12557                    LanguageServerId(0),
12558                    lsp::PublishDiagnosticsParams {
12559                        uri: lsp::Url::from_file_path(path!("/root/file")).unwrap(),
12560                        version: None,
12561                        diagnostics: Vec::new(),
12562                    },
12563                    &[],
12564                    cx,
12565                )
12566                .unwrap()
12567        });
12568    });
12569    executor.run_until_parked();
12570    cx.update_editor(|editor, _, _| {
12571        assert_eq!(
12572            editor.active_diagnostics, None,
12573            "After no diagnostics set to the editor, no diagnostics should be active"
12574        );
12575    });
12576    cx.assert_editor_state(indoc! {"
12577        fn func(abcˇ def: i32) -> u32 {
12578        }
12579    "});
12580
12581    cx.update_editor(|editor, window, cx| {
12582        editor.go_to_diagnostic(&GoToDiagnostic, window, cx);
12583        assert_eq!(
12584            editor.active_diagnostics, None,
12585            "Should be no diagnostics to go to and activate"
12586        );
12587    });
12588    cx.assert_editor_state(indoc! {"
12589        fn func(abcˇ def: i32) -> u32 {
12590        }
12591    "});
12592}
12593
12594#[gpui::test]
12595async fn test_diagnostics_with_links(cx: &mut TestAppContext) {
12596    init_test(cx, |_| {});
12597
12598    let mut cx = EditorTestContext::new(cx).await;
12599
12600    cx.set_state(indoc! {"
12601        fn func(abˇc def: i32) -> u32 {
12602        }
12603    "});
12604    let lsp_store =
12605        cx.update_editor(|editor, _, cx| editor.project.as_ref().unwrap().read(cx).lsp_store());
12606
12607    cx.update(|_, cx| {
12608        lsp_store.update(cx, |lsp_store, cx| {
12609            lsp_store.update_diagnostics(
12610                LanguageServerId(0),
12611                lsp::PublishDiagnosticsParams {
12612                    uri: lsp::Url::from_file_path(path!("/root/file")).unwrap(),
12613                    version: None,
12614                    diagnostics: vec![lsp::Diagnostic {
12615                        range: lsp::Range::new(lsp::Position::new(0, 8), lsp::Position::new(0, 12)),
12616                        severity: Some(lsp::DiagnosticSeverity::ERROR),
12617                        message: "we've had problems with <https://link.one>, and <https://link.two> is broken".to_string(),
12618                        ..Default::default()
12619                    }],
12620                },
12621                &[],
12622                cx,
12623            )
12624        })
12625    }).unwrap();
12626    cx.run_until_parked();
12627    cx.update_editor(|editor, window, cx| {
12628        hover_popover::hover(editor, &Default::default(), window, cx)
12629    });
12630    cx.run_until_parked();
12631    cx.update_editor(|editor, _, _| assert!(editor.hover_state.diagnostic_popover.is_some()))
12632}
12633
12634#[gpui::test]
12635async fn test_go_to_hunk(executor: BackgroundExecutor, cx: &mut TestAppContext) {
12636    init_test(cx, |_| {});
12637
12638    let mut cx = EditorTestContext::new(cx).await;
12639
12640    let diff_base = r#"
12641        use some::mod;
12642
12643        const A: u32 = 42;
12644
12645        fn main() {
12646            println!("hello");
12647
12648            println!("world");
12649        }
12650        "#
12651    .unindent();
12652
12653    // Edits are modified, removed, modified, added
12654    cx.set_state(
12655        &r#"
12656        use some::modified;
12657
12658        ˇ
12659        fn main() {
12660            println!("hello there");
12661
12662            println!("around the");
12663            println!("world");
12664        }
12665        "#
12666        .unindent(),
12667    );
12668
12669    cx.set_head_text(&diff_base);
12670    executor.run_until_parked();
12671
12672    cx.update_editor(|editor, window, cx| {
12673        //Wrap around the bottom of the buffer
12674        for _ in 0..3 {
12675            editor.go_to_next_hunk(&GoToHunk, window, cx);
12676        }
12677    });
12678
12679    cx.assert_editor_state(
12680        &r#"
12681        ˇuse some::modified;
12682
12683
12684        fn main() {
12685            println!("hello there");
12686
12687            println!("around the");
12688            println!("world");
12689        }
12690        "#
12691        .unindent(),
12692    );
12693
12694    cx.update_editor(|editor, window, cx| {
12695        //Wrap around the top of the buffer
12696        for _ in 0..2 {
12697            editor.go_to_prev_hunk(&GoToPreviousHunk, window, cx);
12698        }
12699    });
12700
12701    cx.assert_editor_state(
12702        &r#"
12703        use some::modified;
12704
12705
12706        fn main() {
12707        ˇ    println!("hello there");
12708
12709            println!("around the");
12710            println!("world");
12711        }
12712        "#
12713        .unindent(),
12714    );
12715
12716    cx.update_editor(|editor, window, cx| {
12717        editor.go_to_prev_hunk(&GoToPreviousHunk, window, cx);
12718    });
12719
12720    cx.assert_editor_state(
12721        &r#"
12722        use some::modified;
12723
12724        ˇ
12725        fn main() {
12726            println!("hello there");
12727
12728            println!("around the");
12729            println!("world");
12730        }
12731        "#
12732        .unindent(),
12733    );
12734
12735    cx.update_editor(|editor, window, cx| {
12736        editor.go_to_prev_hunk(&GoToPreviousHunk, window, cx);
12737    });
12738
12739    cx.assert_editor_state(
12740        &r#"
12741        ˇuse some::modified;
12742
12743
12744        fn main() {
12745            println!("hello there");
12746
12747            println!("around the");
12748            println!("world");
12749        }
12750        "#
12751        .unindent(),
12752    );
12753
12754    cx.update_editor(|editor, window, cx| {
12755        for _ in 0..2 {
12756            editor.go_to_prev_hunk(&GoToPreviousHunk, window, cx);
12757        }
12758    });
12759
12760    cx.assert_editor_state(
12761        &r#"
12762        use some::modified;
12763
12764
12765        fn main() {
12766        ˇ    println!("hello there");
12767
12768            println!("around the");
12769            println!("world");
12770        }
12771        "#
12772        .unindent(),
12773    );
12774
12775    cx.update_editor(|editor, window, cx| {
12776        editor.fold(&Fold, window, cx);
12777    });
12778
12779    cx.update_editor(|editor, window, cx| {
12780        editor.go_to_next_hunk(&GoToHunk, window, cx);
12781    });
12782
12783    cx.assert_editor_state(
12784        &r#"
12785        ˇuse some::modified;
12786
12787
12788        fn main() {
12789            println!("hello there");
12790
12791            println!("around the");
12792            println!("world");
12793        }
12794        "#
12795        .unindent(),
12796    );
12797}
12798
12799#[test]
12800fn test_split_words() {
12801    fn split(text: &str) -> Vec<&str> {
12802        split_words(text).collect()
12803    }
12804
12805    assert_eq!(split("HelloWorld"), &["Hello", "World"]);
12806    assert_eq!(split("hello_world"), &["hello_", "world"]);
12807    assert_eq!(split("_hello_world_"), &["_", "hello_", "world_"]);
12808    assert_eq!(split("Hello_World"), &["Hello_", "World"]);
12809    assert_eq!(split("helloWOrld"), &["hello", "WOrld"]);
12810    assert_eq!(split("helloworld"), &["helloworld"]);
12811
12812    assert_eq!(split(":do_the_thing"), &[":", "do_", "the_", "thing"]);
12813}
12814
12815#[gpui::test]
12816async fn test_move_to_enclosing_bracket(cx: &mut TestAppContext) {
12817    init_test(cx, |_| {});
12818
12819    let mut cx = EditorLspTestContext::new_typescript(Default::default(), cx).await;
12820    let mut assert = |before, after| {
12821        let _state_context = cx.set_state(before);
12822        cx.run_until_parked();
12823        cx.update_editor(|editor, window, cx| {
12824            editor.move_to_enclosing_bracket(&MoveToEnclosingBracket, window, cx)
12825        });
12826        cx.run_until_parked();
12827        cx.assert_editor_state(after);
12828    };
12829
12830    // Outside bracket jumps to outside of matching bracket
12831    assert("console.logˇ(var);", "console.log(var)ˇ;");
12832    assert("console.log(var)ˇ;", "console.logˇ(var);");
12833
12834    // Inside bracket jumps to inside of matching bracket
12835    assert("console.log(ˇvar);", "console.log(varˇ);");
12836    assert("console.log(varˇ);", "console.log(ˇvar);");
12837
12838    // When outside a bracket and inside, favor jumping to the inside bracket
12839    assert(
12840        "console.log('foo', [1, 2, 3]ˇ);",
12841        "console.log(ˇ'foo', [1, 2, 3]);",
12842    );
12843    assert(
12844        "console.log(ˇ'foo', [1, 2, 3]);",
12845        "console.log('foo', [1, 2, 3]ˇ);",
12846    );
12847
12848    // Bias forward if two options are equally likely
12849    assert(
12850        "let result = curried_fun()ˇ();",
12851        "let result = curried_fun()()ˇ;",
12852    );
12853
12854    // If directly adjacent to a smaller pair but inside a larger (not adjacent), pick the smaller
12855    assert(
12856        indoc! {"
12857            function test() {
12858                console.log('test')ˇ
12859            }"},
12860        indoc! {"
12861            function test() {
12862                console.logˇ('test')
12863            }"},
12864    );
12865}
12866
12867#[gpui::test]
12868async fn test_on_type_formatting_not_triggered(cx: &mut TestAppContext) {
12869    init_test(cx, |_| {});
12870
12871    let fs = FakeFs::new(cx.executor());
12872    fs.insert_tree(
12873        path!("/a"),
12874        json!({
12875            "main.rs": "fn main() { let a = 5; }",
12876            "other.rs": "// Test file",
12877        }),
12878    )
12879    .await;
12880    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
12881
12882    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
12883    language_registry.add(Arc::new(Language::new(
12884        LanguageConfig {
12885            name: "Rust".into(),
12886            matcher: LanguageMatcher {
12887                path_suffixes: vec!["rs".to_string()],
12888                ..Default::default()
12889            },
12890            brackets: BracketPairConfig {
12891                pairs: vec![BracketPair {
12892                    start: "{".to_string(),
12893                    end: "}".to_string(),
12894                    close: true,
12895                    surround: true,
12896                    newline: true,
12897                }],
12898                disabled_scopes_by_bracket_ix: Vec::new(),
12899            },
12900            ..Default::default()
12901        },
12902        Some(tree_sitter_rust::LANGUAGE.into()),
12903    )));
12904    let mut fake_servers = language_registry.register_fake_lsp(
12905        "Rust",
12906        FakeLspAdapter {
12907            capabilities: lsp::ServerCapabilities {
12908                document_on_type_formatting_provider: Some(lsp::DocumentOnTypeFormattingOptions {
12909                    first_trigger_character: "{".to_string(),
12910                    more_trigger_character: None,
12911                }),
12912                ..Default::default()
12913            },
12914            ..Default::default()
12915        },
12916    );
12917
12918    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
12919
12920    let cx = &mut VisualTestContext::from_window(*workspace, cx);
12921
12922    let worktree_id = workspace
12923        .update(cx, |workspace, _, cx| {
12924            workspace.project().update(cx, |project, cx| {
12925                project.worktrees(cx).next().unwrap().read(cx).id()
12926            })
12927        })
12928        .unwrap();
12929
12930    let buffer = project
12931        .update(cx, |project, cx| {
12932            project.open_local_buffer(path!("/a/main.rs"), cx)
12933        })
12934        .await
12935        .unwrap();
12936    let editor_handle = workspace
12937        .update(cx, |workspace, window, cx| {
12938            workspace.open_path((worktree_id, "main.rs"), None, true, window, cx)
12939        })
12940        .unwrap()
12941        .await
12942        .unwrap()
12943        .downcast::<Editor>()
12944        .unwrap();
12945
12946    cx.executor().start_waiting();
12947    let fake_server = fake_servers.next().await.unwrap();
12948
12949    fake_server.set_request_handler::<lsp::request::OnTypeFormatting, _, _>(
12950        |params, _| async move {
12951            assert_eq!(
12952                params.text_document_position.text_document.uri,
12953                lsp::Url::from_file_path(path!("/a/main.rs")).unwrap(),
12954            );
12955            assert_eq!(
12956                params.text_document_position.position,
12957                lsp::Position::new(0, 21),
12958            );
12959
12960            Ok(Some(vec![lsp::TextEdit {
12961                new_text: "]".to_string(),
12962                range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
12963            }]))
12964        },
12965    );
12966
12967    editor_handle.update_in(cx, |editor, window, cx| {
12968        window.focus(&editor.focus_handle(cx));
12969        editor.change_selections(None, window, cx, |s| {
12970            s.select_ranges([Point::new(0, 21)..Point::new(0, 20)])
12971        });
12972        editor.handle_input("{", window, cx);
12973    });
12974
12975    cx.executor().run_until_parked();
12976
12977    buffer.update(cx, |buffer, _| {
12978        assert_eq!(
12979            buffer.text(),
12980            "fn main() { let a = {5}; }",
12981            "No extra braces from on type formatting should appear in the buffer"
12982        )
12983    });
12984}
12985
12986#[gpui::test]
12987async fn test_language_server_restart_due_to_settings_change(cx: &mut TestAppContext) {
12988    init_test(cx, |_| {});
12989
12990    let fs = FakeFs::new(cx.executor());
12991    fs.insert_tree(
12992        path!("/a"),
12993        json!({
12994            "main.rs": "fn main() { let a = 5; }",
12995            "other.rs": "// Test file",
12996        }),
12997    )
12998    .await;
12999
13000    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
13001
13002    let server_restarts = Arc::new(AtomicUsize::new(0));
13003    let closure_restarts = Arc::clone(&server_restarts);
13004    let language_server_name = "test language server";
13005    let language_name: LanguageName = "Rust".into();
13006
13007    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
13008    language_registry.add(Arc::new(Language::new(
13009        LanguageConfig {
13010            name: language_name.clone(),
13011            matcher: LanguageMatcher {
13012                path_suffixes: vec!["rs".to_string()],
13013                ..Default::default()
13014            },
13015            ..Default::default()
13016        },
13017        Some(tree_sitter_rust::LANGUAGE.into()),
13018    )));
13019    let mut fake_servers = language_registry.register_fake_lsp(
13020        "Rust",
13021        FakeLspAdapter {
13022            name: language_server_name,
13023            initialization_options: Some(json!({
13024                "testOptionValue": true
13025            })),
13026            initializer: Some(Box::new(move |fake_server| {
13027                let task_restarts = Arc::clone(&closure_restarts);
13028                fake_server.set_request_handler::<lsp::request::Shutdown, _, _>(move |_, _| {
13029                    task_restarts.fetch_add(1, atomic::Ordering::Release);
13030                    futures::future::ready(Ok(()))
13031                });
13032            })),
13033            ..Default::default()
13034        },
13035    );
13036
13037    let _window = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
13038    let _buffer = project
13039        .update(cx, |project, cx| {
13040            project.open_local_buffer_with_lsp(path!("/a/main.rs"), cx)
13041        })
13042        .await
13043        .unwrap();
13044    let _fake_server = fake_servers.next().await.unwrap();
13045    update_test_language_settings(cx, |language_settings| {
13046        language_settings.languages.insert(
13047            language_name.clone(),
13048            LanguageSettingsContent {
13049                tab_size: NonZeroU32::new(8),
13050                ..Default::default()
13051            },
13052        );
13053    });
13054    cx.executor().run_until_parked();
13055    assert_eq!(
13056        server_restarts.load(atomic::Ordering::Acquire),
13057        0,
13058        "Should not restart LSP server on an unrelated change"
13059    );
13060
13061    update_test_project_settings(cx, |project_settings| {
13062        project_settings.lsp.insert(
13063            "Some other server name".into(),
13064            LspSettings {
13065                binary: None,
13066                settings: None,
13067                initialization_options: Some(json!({
13068                    "some other init value": false
13069                })),
13070                enable_lsp_tasks: false,
13071            },
13072        );
13073    });
13074    cx.executor().run_until_parked();
13075    assert_eq!(
13076        server_restarts.load(atomic::Ordering::Acquire),
13077        0,
13078        "Should not restart LSP server on an unrelated LSP settings change"
13079    );
13080
13081    update_test_project_settings(cx, |project_settings| {
13082        project_settings.lsp.insert(
13083            language_server_name.into(),
13084            LspSettings {
13085                binary: None,
13086                settings: None,
13087                initialization_options: Some(json!({
13088                    "anotherInitValue": false
13089                })),
13090                enable_lsp_tasks: false,
13091            },
13092        );
13093    });
13094    cx.executor().run_until_parked();
13095    assert_eq!(
13096        server_restarts.load(atomic::Ordering::Acquire),
13097        1,
13098        "Should restart LSP server on a related LSP settings change"
13099    );
13100
13101    update_test_project_settings(cx, |project_settings| {
13102        project_settings.lsp.insert(
13103            language_server_name.into(),
13104            LspSettings {
13105                binary: None,
13106                settings: None,
13107                initialization_options: Some(json!({
13108                    "anotherInitValue": false
13109                })),
13110                enable_lsp_tasks: false,
13111            },
13112        );
13113    });
13114    cx.executor().run_until_parked();
13115    assert_eq!(
13116        server_restarts.load(atomic::Ordering::Acquire),
13117        1,
13118        "Should not restart LSP server on a related LSP settings change that is the same"
13119    );
13120
13121    update_test_project_settings(cx, |project_settings| {
13122        project_settings.lsp.insert(
13123            language_server_name.into(),
13124            LspSettings {
13125                binary: None,
13126                settings: None,
13127                initialization_options: None,
13128                enable_lsp_tasks: false,
13129            },
13130        );
13131    });
13132    cx.executor().run_until_parked();
13133    assert_eq!(
13134        server_restarts.load(atomic::Ordering::Acquire),
13135        2,
13136        "Should restart LSP server on another related LSP settings change"
13137    );
13138}
13139
13140#[gpui::test]
13141async fn test_completions_with_additional_edits(cx: &mut TestAppContext) {
13142    init_test(cx, |_| {});
13143
13144    let mut cx = EditorLspTestContext::new_rust(
13145        lsp::ServerCapabilities {
13146            completion_provider: Some(lsp::CompletionOptions {
13147                trigger_characters: Some(vec![".".to_string()]),
13148                resolve_provider: Some(true),
13149                ..Default::default()
13150            }),
13151            ..Default::default()
13152        },
13153        cx,
13154    )
13155    .await;
13156
13157    cx.set_state("fn main() { let a = 2ˇ; }");
13158    cx.simulate_keystroke(".");
13159    let completion_item = lsp::CompletionItem {
13160        label: "some".into(),
13161        kind: Some(lsp::CompletionItemKind::SNIPPET),
13162        detail: Some("Wrap the expression in an `Option::Some`".to_string()),
13163        documentation: Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
13164            kind: lsp::MarkupKind::Markdown,
13165            value: "```rust\nSome(2)\n```".to_string(),
13166        })),
13167        deprecated: Some(false),
13168        sort_text: Some("fffffff2".to_string()),
13169        filter_text: Some("some".to_string()),
13170        insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
13171        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13172            range: lsp::Range {
13173                start: lsp::Position {
13174                    line: 0,
13175                    character: 22,
13176                },
13177                end: lsp::Position {
13178                    line: 0,
13179                    character: 22,
13180                },
13181            },
13182            new_text: "Some(2)".to_string(),
13183        })),
13184        additional_text_edits: Some(vec![lsp::TextEdit {
13185            range: lsp::Range {
13186                start: lsp::Position {
13187                    line: 0,
13188                    character: 20,
13189                },
13190                end: lsp::Position {
13191                    line: 0,
13192                    character: 22,
13193                },
13194            },
13195            new_text: "".to_string(),
13196        }]),
13197        ..Default::default()
13198    };
13199
13200    let closure_completion_item = completion_item.clone();
13201    let mut request = cx.set_request_handler::<lsp::request::Completion, _, _>(move |_, _, _| {
13202        let task_completion_item = closure_completion_item.clone();
13203        async move {
13204            Ok(Some(lsp::CompletionResponse::Array(vec![
13205                task_completion_item,
13206            ])))
13207        }
13208    });
13209
13210    request.next().await;
13211
13212    cx.condition(|editor, _| editor.context_menu_visible())
13213        .await;
13214    let apply_additional_edits = cx.update_editor(|editor, window, cx| {
13215        editor
13216            .confirm_completion(&ConfirmCompletion::default(), window, cx)
13217            .unwrap()
13218    });
13219    cx.assert_editor_state("fn main() { let a = 2.Some(2)ˇ; }");
13220
13221    cx.set_request_handler::<lsp::request::ResolveCompletionItem, _, _>(move |_, _, _| {
13222        let task_completion_item = completion_item.clone();
13223        async move { Ok(task_completion_item) }
13224    })
13225    .next()
13226    .await
13227    .unwrap();
13228    apply_additional_edits.await.unwrap();
13229    cx.assert_editor_state("fn main() { let a = Some(2)ˇ; }");
13230}
13231
13232#[gpui::test]
13233async fn test_completions_resolve_updates_labels_if_filter_text_matches(cx: &mut TestAppContext) {
13234    init_test(cx, |_| {});
13235
13236    let mut cx = EditorLspTestContext::new_rust(
13237        lsp::ServerCapabilities {
13238            completion_provider: Some(lsp::CompletionOptions {
13239                trigger_characters: Some(vec![".".to_string()]),
13240                resolve_provider: Some(true),
13241                ..Default::default()
13242            }),
13243            ..Default::default()
13244        },
13245        cx,
13246    )
13247    .await;
13248
13249    cx.set_state("fn main() { let a = 2ˇ; }");
13250    cx.simulate_keystroke(".");
13251
13252    let item1 = lsp::CompletionItem {
13253        label: "method id()".to_string(),
13254        filter_text: Some("id".to_string()),
13255        detail: None,
13256        documentation: None,
13257        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13258            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
13259            new_text: ".id".to_string(),
13260        })),
13261        ..lsp::CompletionItem::default()
13262    };
13263
13264    let item2 = lsp::CompletionItem {
13265        label: "other".to_string(),
13266        filter_text: Some("other".to_string()),
13267        detail: None,
13268        documentation: None,
13269        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13270            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
13271            new_text: ".other".to_string(),
13272        })),
13273        ..lsp::CompletionItem::default()
13274    };
13275
13276    let item1 = item1.clone();
13277    cx.set_request_handler::<lsp::request::Completion, _, _>({
13278        let item1 = item1.clone();
13279        move |_, _, _| {
13280            let item1 = item1.clone();
13281            let item2 = item2.clone();
13282            async move { Ok(Some(lsp::CompletionResponse::Array(vec![item1, item2]))) }
13283        }
13284    })
13285    .next()
13286    .await;
13287
13288    cx.condition(|editor, _| editor.context_menu_visible())
13289        .await;
13290    cx.update_editor(|editor, _, _| {
13291        let context_menu = editor.context_menu.borrow_mut();
13292        let context_menu = context_menu
13293            .as_ref()
13294            .expect("Should have the context menu deployed");
13295        match context_menu {
13296            CodeContextMenu::Completions(completions_menu) => {
13297                let completions = completions_menu.completions.borrow_mut();
13298                assert_eq!(
13299                    completions
13300                        .iter()
13301                        .map(|completion| &completion.label.text)
13302                        .collect::<Vec<_>>(),
13303                    vec!["method id()", "other"]
13304                )
13305            }
13306            CodeContextMenu::CodeActions(_) => panic!("Should show the completions menu"),
13307        }
13308    });
13309
13310    cx.set_request_handler::<lsp::request::ResolveCompletionItem, _, _>({
13311        let item1 = item1.clone();
13312        move |_, item_to_resolve, _| {
13313            let item1 = item1.clone();
13314            async move {
13315                if item1 == item_to_resolve {
13316                    Ok(lsp::CompletionItem {
13317                        label: "method id()".to_string(),
13318                        filter_text: Some("id".to_string()),
13319                        detail: Some("Now resolved!".to_string()),
13320                        documentation: Some(lsp::Documentation::String("Docs".to_string())),
13321                        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13322                            range: lsp::Range::new(
13323                                lsp::Position::new(0, 22),
13324                                lsp::Position::new(0, 22),
13325                            ),
13326                            new_text: ".id".to_string(),
13327                        })),
13328                        ..lsp::CompletionItem::default()
13329                    })
13330                } else {
13331                    Ok(item_to_resolve)
13332                }
13333            }
13334        }
13335    })
13336    .next()
13337    .await
13338    .unwrap();
13339    cx.run_until_parked();
13340
13341    cx.update_editor(|editor, window, cx| {
13342        editor.context_menu_next(&Default::default(), window, cx);
13343    });
13344
13345    cx.update_editor(|editor, _, _| {
13346        let context_menu = editor.context_menu.borrow_mut();
13347        let context_menu = context_menu
13348            .as_ref()
13349            .expect("Should have the context menu deployed");
13350        match context_menu {
13351            CodeContextMenu::Completions(completions_menu) => {
13352                let completions = completions_menu.completions.borrow_mut();
13353                assert_eq!(
13354                    completions
13355                        .iter()
13356                        .map(|completion| &completion.label.text)
13357                        .collect::<Vec<_>>(),
13358                    vec!["method id() Now resolved!", "other"],
13359                    "Should update first completion label, but not second as the filter text did not match."
13360                );
13361            }
13362            CodeContextMenu::CodeActions(_) => panic!("Should show the completions menu"),
13363        }
13364    });
13365}
13366
13367#[gpui::test]
13368async fn test_completions_resolve_happens_once(cx: &mut TestAppContext) {
13369    init_test(cx, |_| {});
13370
13371    let mut cx = EditorLspTestContext::new_rust(
13372        lsp::ServerCapabilities {
13373            completion_provider: Some(lsp::CompletionOptions {
13374                trigger_characters: Some(vec![".".to_string()]),
13375                resolve_provider: Some(true),
13376                ..Default::default()
13377            }),
13378            ..Default::default()
13379        },
13380        cx,
13381    )
13382    .await;
13383
13384    cx.set_state("fn main() { let a = 2ˇ; }");
13385    cx.simulate_keystroke(".");
13386
13387    let unresolved_item_1 = lsp::CompletionItem {
13388        label: "id".to_string(),
13389        filter_text: Some("id".to_string()),
13390        detail: None,
13391        documentation: None,
13392        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13393            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
13394            new_text: ".id".to_string(),
13395        })),
13396        ..lsp::CompletionItem::default()
13397    };
13398    let resolved_item_1 = lsp::CompletionItem {
13399        additional_text_edits: Some(vec![lsp::TextEdit {
13400            range: lsp::Range::new(lsp::Position::new(0, 20), lsp::Position::new(0, 22)),
13401            new_text: "!!".to_string(),
13402        }]),
13403        ..unresolved_item_1.clone()
13404    };
13405    let unresolved_item_2 = lsp::CompletionItem {
13406        label: "other".to_string(),
13407        filter_text: Some("other".to_string()),
13408        detail: None,
13409        documentation: None,
13410        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13411            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
13412            new_text: ".other".to_string(),
13413        })),
13414        ..lsp::CompletionItem::default()
13415    };
13416    let resolved_item_2 = lsp::CompletionItem {
13417        additional_text_edits: Some(vec![lsp::TextEdit {
13418            range: lsp::Range::new(lsp::Position::new(0, 20), lsp::Position::new(0, 22)),
13419            new_text: "??".to_string(),
13420        }]),
13421        ..unresolved_item_2.clone()
13422    };
13423
13424    let resolve_requests_1 = Arc::new(AtomicUsize::new(0));
13425    let resolve_requests_2 = Arc::new(AtomicUsize::new(0));
13426    cx.lsp
13427        .server
13428        .on_request::<lsp::request::ResolveCompletionItem, _, _>({
13429            let unresolved_item_1 = unresolved_item_1.clone();
13430            let resolved_item_1 = resolved_item_1.clone();
13431            let unresolved_item_2 = unresolved_item_2.clone();
13432            let resolved_item_2 = resolved_item_2.clone();
13433            let resolve_requests_1 = resolve_requests_1.clone();
13434            let resolve_requests_2 = resolve_requests_2.clone();
13435            move |unresolved_request, _| {
13436                let unresolved_item_1 = unresolved_item_1.clone();
13437                let resolved_item_1 = resolved_item_1.clone();
13438                let unresolved_item_2 = unresolved_item_2.clone();
13439                let resolved_item_2 = resolved_item_2.clone();
13440                let resolve_requests_1 = resolve_requests_1.clone();
13441                let resolve_requests_2 = resolve_requests_2.clone();
13442                async move {
13443                    if unresolved_request == unresolved_item_1 {
13444                        resolve_requests_1.fetch_add(1, atomic::Ordering::Release);
13445                        Ok(resolved_item_1.clone())
13446                    } else if unresolved_request == unresolved_item_2 {
13447                        resolve_requests_2.fetch_add(1, atomic::Ordering::Release);
13448                        Ok(resolved_item_2.clone())
13449                    } else {
13450                        panic!("Unexpected completion item {unresolved_request:?}")
13451                    }
13452                }
13453            }
13454        })
13455        .detach();
13456
13457    cx.set_request_handler::<lsp::request::Completion, _, _>(move |_, _, _| {
13458        let unresolved_item_1 = unresolved_item_1.clone();
13459        let unresolved_item_2 = unresolved_item_2.clone();
13460        async move {
13461            Ok(Some(lsp::CompletionResponse::Array(vec![
13462                unresolved_item_1,
13463                unresolved_item_2,
13464            ])))
13465        }
13466    })
13467    .next()
13468    .await;
13469
13470    cx.condition(|editor, _| editor.context_menu_visible())
13471        .await;
13472    cx.update_editor(|editor, _, _| {
13473        let context_menu = editor.context_menu.borrow_mut();
13474        let context_menu = context_menu
13475            .as_ref()
13476            .expect("Should have the context menu deployed");
13477        match context_menu {
13478            CodeContextMenu::Completions(completions_menu) => {
13479                let completions = completions_menu.completions.borrow_mut();
13480                assert_eq!(
13481                    completions
13482                        .iter()
13483                        .map(|completion| &completion.label.text)
13484                        .collect::<Vec<_>>(),
13485                    vec!["id", "other"]
13486                )
13487            }
13488            CodeContextMenu::CodeActions(_) => panic!("Should show the completions menu"),
13489        }
13490    });
13491    cx.run_until_parked();
13492
13493    cx.update_editor(|editor, window, cx| {
13494        editor.context_menu_next(&ContextMenuNext, window, cx);
13495    });
13496    cx.run_until_parked();
13497    cx.update_editor(|editor, window, cx| {
13498        editor.context_menu_prev(&ContextMenuPrevious, window, cx);
13499    });
13500    cx.run_until_parked();
13501    cx.update_editor(|editor, window, cx| {
13502        editor.context_menu_next(&ContextMenuNext, window, cx);
13503    });
13504    cx.run_until_parked();
13505    cx.update_editor(|editor, window, cx| {
13506        editor
13507            .compose_completion(&ComposeCompletion::default(), window, cx)
13508            .expect("No task returned")
13509    })
13510    .await
13511    .expect("Completion failed");
13512    cx.run_until_parked();
13513
13514    cx.update_editor(|editor, _, cx| {
13515        assert_eq!(
13516            resolve_requests_1.load(atomic::Ordering::Acquire),
13517            1,
13518            "Should always resolve once despite multiple selections"
13519        );
13520        assert_eq!(
13521            resolve_requests_2.load(atomic::Ordering::Acquire),
13522            1,
13523            "Should always resolve once after multiple selections and applying the completion"
13524        );
13525        assert_eq!(
13526            editor.text(cx),
13527            "fn main() { let a = ??.other; }",
13528            "Should use resolved data when applying the completion"
13529        );
13530    });
13531}
13532
13533#[gpui::test]
13534async fn test_completions_default_resolve_data_handling(cx: &mut TestAppContext) {
13535    init_test(cx, |_| {});
13536
13537    let item_0 = lsp::CompletionItem {
13538        label: "abs".into(),
13539        insert_text: Some("abs".into()),
13540        data: Some(json!({ "very": "special"})),
13541        insert_text_mode: Some(lsp::InsertTextMode::ADJUST_INDENTATION),
13542        text_edit: Some(lsp::CompletionTextEdit::InsertAndReplace(
13543            lsp::InsertReplaceEdit {
13544                new_text: "abs".to_string(),
13545                insert: lsp::Range::default(),
13546                replace: lsp::Range::default(),
13547            },
13548        )),
13549        ..lsp::CompletionItem::default()
13550    };
13551    let items = iter::once(item_0.clone())
13552        .chain((11..51).map(|i| lsp::CompletionItem {
13553            label: format!("item_{}", i),
13554            insert_text: Some(format!("item_{}", i)),
13555            insert_text_format: Some(lsp::InsertTextFormat::PLAIN_TEXT),
13556            ..lsp::CompletionItem::default()
13557        }))
13558        .collect::<Vec<_>>();
13559
13560    let default_commit_characters = vec!["?".to_string()];
13561    let default_data = json!({ "default": "data"});
13562    let default_insert_text_format = lsp::InsertTextFormat::SNIPPET;
13563    let default_insert_text_mode = lsp::InsertTextMode::AS_IS;
13564    let default_edit_range = lsp::Range {
13565        start: lsp::Position {
13566            line: 0,
13567            character: 5,
13568        },
13569        end: lsp::Position {
13570            line: 0,
13571            character: 5,
13572        },
13573    };
13574
13575    let mut cx = EditorLspTestContext::new_rust(
13576        lsp::ServerCapabilities {
13577            completion_provider: Some(lsp::CompletionOptions {
13578                trigger_characters: Some(vec![".".to_string()]),
13579                resolve_provider: Some(true),
13580                ..Default::default()
13581            }),
13582            ..Default::default()
13583        },
13584        cx,
13585    )
13586    .await;
13587
13588    cx.set_state("fn main() { let a = 2ˇ; }");
13589    cx.simulate_keystroke(".");
13590
13591    let completion_data = default_data.clone();
13592    let completion_characters = default_commit_characters.clone();
13593    let completion_items = items.clone();
13594    cx.set_request_handler::<lsp::request::Completion, _, _>(move |_, _, _| {
13595        let default_data = completion_data.clone();
13596        let default_commit_characters = completion_characters.clone();
13597        let items = completion_items.clone();
13598        async move {
13599            Ok(Some(lsp::CompletionResponse::List(lsp::CompletionList {
13600                items,
13601                item_defaults: Some(lsp::CompletionListItemDefaults {
13602                    data: Some(default_data.clone()),
13603                    commit_characters: Some(default_commit_characters.clone()),
13604                    edit_range: Some(lsp::CompletionListItemDefaultsEditRange::Range(
13605                        default_edit_range,
13606                    )),
13607                    insert_text_format: Some(default_insert_text_format),
13608                    insert_text_mode: Some(default_insert_text_mode),
13609                }),
13610                ..lsp::CompletionList::default()
13611            })))
13612        }
13613    })
13614    .next()
13615    .await;
13616
13617    let resolved_items = Arc::new(Mutex::new(Vec::new()));
13618    cx.lsp
13619        .server
13620        .on_request::<lsp::request::ResolveCompletionItem, _, _>({
13621            let closure_resolved_items = resolved_items.clone();
13622            move |item_to_resolve, _| {
13623                let closure_resolved_items = closure_resolved_items.clone();
13624                async move {
13625                    closure_resolved_items.lock().push(item_to_resolve.clone());
13626                    Ok(item_to_resolve)
13627                }
13628            }
13629        })
13630        .detach();
13631
13632    cx.condition(|editor, _| editor.context_menu_visible())
13633        .await;
13634    cx.run_until_parked();
13635    cx.update_editor(|editor, _, _| {
13636        let menu = editor.context_menu.borrow_mut();
13637        match menu.as_ref().expect("should have the completions menu") {
13638            CodeContextMenu::Completions(completions_menu) => {
13639                assert_eq!(
13640                    completions_menu
13641                        .entries
13642                        .borrow()
13643                        .iter()
13644                        .map(|mat| mat.string.clone())
13645                        .collect::<Vec<String>>(),
13646                    items
13647                        .iter()
13648                        .map(|completion| completion.label.clone())
13649                        .collect::<Vec<String>>()
13650                );
13651            }
13652            CodeContextMenu::CodeActions(_) => panic!("Expected to have the completions menu"),
13653        }
13654    });
13655    // Approximate initial displayed interval is 0..12. With extra item padding of 4 this is 0..16
13656    // with 4 from the end.
13657    assert_eq!(
13658        *resolved_items.lock(),
13659        [&items[0..16], &items[items.len() - 4..items.len()]]
13660            .concat()
13661            .iter()
13662            .cloned()
13663            .map(|mut item| {
13664                if item.data.is_none() {
13665                    item.data = Some(default_data.clone());
13666                }
13667                item
13668            })
13669            .collect::<Vec<lsp::CompletionItem>>(),
13670        "Items sent for resolve should be unchanged modulo resolve `data` filled with default if missing"
13671    );
13672    resolved_items.lock().clear();
13673
13674    cx.update_editor(|editor, window, cx| {
13675        editor.context_menu_prev(&ContextMenuPrevious, window, cx);
13676    });
13677    cx.run_until_parked();
13678    // Completions that have already been resolved are skipped.
13679    assert_eq!(
13680        *resolved_items.lock(),
13681        items[items.len() - 16..items.len() - 4]
13682            .iter()
13683            .cloned()
13684            .map(|mut item| {
13685                if item.data.is_none() {
13686                    item.data = Some(default_data.clone());
13687                }
13688                item
13689            })
13690            .collect::<Vec<lsp::CompletionItem>>()
13691    );
13692    resolved_items.lock().clear();
13693}
13694
13695#[gpui::test]
13696async fn test_completions_in_languages_with_extra_word_characters(cx: &mut TestAppContext) {
13697    init_test(cx, |_| {});
13698
13699    let mut cx = EditorLspTestContext::new(
13700        Language::new(
13701            LanguageConfig {
13702                matcher: LanguageMatcher {
13703                    path_suffixes: vec!["jsx".into()],
13704                    ..Default::default()
13705                },
13706                overrides: [(
13707                    "element".into(),
13708                    LanguageConfigOverride {
13709                        completion_query_characters: Override::Set(['-'].into_iter().collect()),
13710                        ..Default::default()
13711                    },
13712                )]
13713                .into_iter()
13714                .collect(),
13715                ..Default::default()
13716            },
13717            Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
13718        )
13719        .with_override_query("(jsx_self_closing_element) @element")
13720        .unwrap(),
13721        lsp::ServerCapabilities {
13722            completion_provider: Some(lsp::CompletionOptions {
13723                trigger_characters: Some(vec![":".to_string()]),
13724                ..Default::default()
13725            }),
13726            ..Default::default()
13727        },
13728        cx,
13729    )
13730    .await;
13731
13732    cx.lsp
13733        .set_request_handler::<lsp::request::Completion, _, _>(move |_, _| async move {
13734            Ok(Some(lsp::CompletionResponse::Array(vec![
13735                lsp::CompletionItem {
13736                    label: "bg-blue".into(),
13737                    ..Default::default()
13738                },
13739                lsp::CompletionItem {
13740                    label: "bg-red".into(),
13741                    ..Default::default()
13742                },
13743                lsp::CompletionItem {
13744                    label: "bg-yellow".into(),
13745                    ..Default::default()
13746                },
13747            ])))
13748        });
13749
13750    cx.set_state(r#"<p class="bgˇ" />"#);
13751
13752    // Trigger completion when typing a dash, because the dash is an extra
13753    // word character in the 'element' scope, which contains the cursor.
13754    cx.simulate_keystroke("-");
13755    cx.executor().run_until_parked();
13756    cx.update_editor(|editor, _, _| {
13757        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
13758        {
13759            assert_eq!(
13760                completion_menu_entries(&menu),
13761                &["bg-red", "bg-blue", "bg-yellow"]
13762            );
13763        } else {
13764            panic!("expected completion menu to be open");
13765        }
13766    });
13767
13768    cx.simulate_keystroke("l");
13769    cx.executor().run_until_parked();
13770    cx.update_editor(|editor, _, _| {
13771        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
13772        {
13773            assert_eq!(completion_menu_entries(&menu), &["bg-blue", "bg-yellow"]);
13774        } else {
13775            panic!("expected completion menu to be open");
13776        }
13777    });
13778
13779    // When filtering completions, consider the character after the '-' to
13780    // be the start of a subword.
13781    cx.set_state(r#"<p class="yelˇ" />"#);
13782    cx.simulate_keystroke("l");
13783    cx.executor().run_until_parked();
13784    cx.update_editor(|editor, _, _| {
13785        if let Some(CodeContextMenu::Completions(menu)) = editor.context_menu.borrow_mut().as_ref()
13786        {
13787            assert_eq!(completion_menu_entries(&menu), &["bg-yellow"]);
13788        } else {
13789            panic!("expected completion menu to be open");
13790        }
13791    });
13792}
13793
13794fn completion_menu_entries(menu: &CompletionsMenu) -> Vec<String> {
13795    let entries = menu.entries.borrow();
13796    entries.iter().map(|mat| mat.string.clone()).collect()
13797}
13798
13799#[gpui::test]
13800async fn test_document_format_with_prettier(cx: &mut TestAppContext) {
13801    init_test(cx, |settings| {
13802        settings.defaults.formatter = Some(language_settings::SelectedFormatter::List(
13803            FormatterList(vec![Formatter::Prettier].into()),
13804        ))
13805    });
13806
13807    let fs = FakeFs::new(cx.executor());
13808    fs.insert_file(path!("/file.ts"), Default::default()).await;
13809
13810    let project = Project::test(fs, [path!("/file.ts").as_ref()], cx).await;
13811    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
13812
13813    language_registry.add(Arc::new(Language::new(
13814        LanguageConfig {
13815            name: "TypeScript".into(),
13816            matcher: LanguageMatcher {
13817                path_suffixes: vec!["ts".to_string()],
13818                ..Default::default()
13819            },
13820            ..Default::default()
13821        },
13822        Some(tree_sitter_typescript::LANGUAGE_TYPESCRIPT.into()),
13823    )));
13824    update_test_language_settings(cx, |settings| {
13825        settings.defaults.prettier = Some(PrettierSettings {
13826            allowed: true,
13827            ..PrettierSettings::default()
13828        });
13829    });
13830
13831    let test_plugin = "test_plugin";
13832    let _ = language_registry.register_fake_lsp(
13833        "TypeScript",
13834        FakeLspAdapter {
13835            prettier_plugins: vec![test_plugin],
13836            ..Default::default()
13837        },
13838    );
13839
13840    let prettier_format_suffix = project::TEST_PRETTIER_FORMAT_SUFFIX;
13841    let buffer = project
13842        .update(cx, |project, cx| {
13843            project.open_local_buffer(path!("/file.ts"), cx)
13844        })
13845        .await
13846        .unwrap();
13847
13848    let buffer_text = "one\ntwo\nthree\n";
13849    let buffer = cx.new(|cx| MultiBuffer::singleton(buffer, cx));
13850    let (editor, cx) = cx.add_window_view(|window, cx| build_editor(buffer, window, cx));
13851    editor.update_in(cx, |editor, window, cx| {
13852        editor.set_text(buffer_text, window, cx)
13853    });
13854
13855    editor
13856        .update_in(cx, |editor, window, cx| {
13857            editor.perform_format(
13858                project.clone(),
13859                FormatTrigger::Manual,
13860                FormatTarget::Buffers,
13861                window,
13862                cx,
13863            )
13864        })
13865        .unwrap()
13866        .await;
13867    assert_eq!(
13868        editor.update(cx, |editor, cx| editor.text(cx)),
13869        buffer_text.to_string() + prettier_format_suffix,
13870        "Test prettier formatting was not applied to the original buffer text",
13871    );
13872
13873    update_test_language_settings(cx, |settings| {
13874        settings.defaults.formatter = Some(language_settings::SelectedFormatter::Auto)
13875    });
13876    let format = editor.update_in(cx, |editor, window, cx| {
13877        editor.perform_format(
13878            project.clone(),
13879            FormatTrigger::Manual,
13880            FormatTarget::Buffers,
13881            window,
13882            cx,
13883        )
13884    });
13885    format.await.unwrap();
13886    assert_eq!(
13887        editor.update(cx, |editor, cx| editor.text(cx)),
13888        buffer_text.to_string() + prettier_format_suffix + "\n" + prettier_format_suffix,
13889        "Autoformatting (via test prettier) was not applied to the original buffer text",
13890    );
13891}
13892
13893#[gpui::test]
13894async fn test_addition_reverts(cx: &mut TestAppContext) {
13895    init_test(cx, |_| {});
13896    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
13897    let base_text = indoc! {r#"
13898        struct Row;
13899        struct Row1;
13900        struct Row2;
13901
13902        struct Row4;
13903        struct Row5;
13904        struct Row6;
13905
13906        struct Row8;
13907        struct Row9;
13908        struct Row10;"#};
13909
13910    // When addition hunks are not adjacent to carets, no hunk revert is performed
13911    assert_hunk_revert(
13912        indoc! {r#"struct Row;
13913                   struct Row1;
13914                   struct Row1.1;
13915                   struct Row1.2;
13916                   struct Row2;ˇ
13917
13918                   struct Row4;
13919                   struct Row5;
13920                   struct Row6;
13921
13922                   struct Row8;
13923                   ˇstruct Row9;
13924                   struct Row9.1;
13925                   struct Row9.2;
13926                   struct Row9.3;
13927                   struct Row10;"#},
13928        vec![DiffHunkStatusKind::Added, DiffHunkStatusKind::Added],
13929        indoc! {r#"struct Row;
13930                   struct Row1;
13931                   struct Row1.1;
13932                   struct Row1.2;
13933                   struct Row2;ˇ
13934
13935                   struct Row4;
13936                   struct Row5;
13937                   struct Row6;
13938
13939                   struct Row8;
13940                   ˇstruct Row9;
13941                   struct Row9.1;
13942                   struct Row9.2;
13943                   struct Row9.3;
13944                   struct Row10;"#},
13945        base_text,
13946        &mut cx,
13947    );
13948    // Same for selections
13949    assert_hunk_revert(
13950        indoc! {r#"struct Row;
13951                   struct Row1;
13952                   struct Row2;
13953                   struct Row2.1;
13954                   struct Row2.2;
13955                   «ˇ
13956                   struct Row4;
13957                   struct» Row5;
13958                   «struct Row6;
13959                   ˇ»
13960                   struct Row9.1;
13961                   struct Row9.2;
13962                   struct Row9.3;
13963                   struct Row8;
13964                   struct Row9;
13965                   struct Row10;"#},
13966        vec![DiffHunkStatusKind::Added, DiffHunkStatusKind::Added],
13967        indoc! {r#"struct Row;
13968                   struct Row1;
13969                   struct Row2;
13970                   struct Row2.1;
13971                   struct Row2.2;
13972                   «ˇ
13973                   struct Row4;
13974                   struct» Row5;
13975                   «struct Row6;
13976                   ˇ»
13977                   struct Row9.1;
13978                   struct Row9.2;
13979                   struct Row9.3;
13980                   struct Row8;
13981                   struct Row9;
13982                   struct Row10;"#},
13983        base_text,
13984        &mut cx,
13985    );
13986
13987    // When carets and selections intersect the addition hunks, those are reverted.
13988    // Adjacent carets got merged.
13989    assert_hunk_revert(
13990        indoc! {r#"struct Row;
13991                   ˇ// something on the top
13992                   struct Row1;
13993                   struct Row2;
13994                   struct Roˇw3.1;
13995                   struct Row2.2;
13996                   struct Row2.3;ˇ
13997
13998                   struct Row4;
13999                   struct ˇRow5.1;
14000                   struct Row5.2;
14001                   struct «Rowˇ»5.3;
14002                   struct Row5;
14003                   struct Row6;
14004                   ˇ
14005                   struct Row9.1;
14006                   struct «Rowˇ»9.2;
14007                   struct «ˇRow»9.3;
14008                   struct Row8;
14009                   struct Row9;
14010                   «ˇ// something on bottom»
14011                   struct Row10;"#},
14012        vec![
14013            DiffHunkStatusKind::Added,
14014            DiffHunkStatusKind::Added,
14015            DiffHunkStatusKind::Added,
14016            DiffHunkStatusKind::Added,
14017            DiffHunkStatusKind::Added,
14018        ],
14019        indoc! {r#"struct Row;
14020                   ˇstruct Row1;
14021                   struct Row2;
14022                   ˇ
14023                   struct Row4;
14024                   ˇstruct Row5;
14025                   struct Row6;
14026                   ˇ
14027                   ˇstruct Row8;
14028                   struct Row9;
14029                   ˇstruct Row10;"#},
14030        base_text,
14031        &mut cx,
14032    );
14033}
14034
14035#[gpui::test]
14036async fn test_modification_reverts(cx: &mut TestAppContext) {
14037    init_test(cx, |_| {});
14038    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
14039    let base_text = indoc! {r#"
14040        struct Row;
14041        struct Row1;
14042        struct Row2;
14043
14044        struct Row4;
14045        struct Row5;
14046        struct Row6;
14047
14048        struct Row8;
14049        struct Row9;
14050        struct Row10;"#};
14051
14052    // Modification hunks behave the same as the addition ones.
14053    assert_hunk_revert(
14054        indoc! {r#"struct Row;
14055                   struct Row1;
14056                   struct Row33;
14057                   ˇ
14058                   struct Row4;
14059                   struct Row5;
14060                   struct Row6;
14061                   ˇ
14062                   struct Row99;
14063                   struct Row9;
14064                   struct Row10;"#},
14065        vec![DiffHunkStatusKind::Modified, DiffHunkStatusKind::Modified],
14066        indoc! {r#"struct Row;
14067                   struct Row1;
14068                   struct Row33;
14069                   ˇ
14070                   struct Row4;
14071                   struct Row5;
14072                   struct Row6;
14073                   ˇ
14074                   struct Row99;
14075                   struct Row9;
14076                   struct Row10;"#},
14077        base_text,
14078        &mut cx,
14079    );
14080    assert_hunk_revert(
14081        indoc! {r#"struct Row;
14082                   struct Row1;
14083                   struct Row33;
14084                   «ˇ
14085                   struct Row4;
14086                   struct» Row5;
14087                   «struct Row6;
14088                   ˇ»
14089                   struct Row99;
14090                   struct Row9;
14091                   struct Row10;"#},
14092        vec![DiffHunkStatusKind::Modified, DiffHunkStatusKind::Modified],
14093        indoc! {r#"struct Row;
14094                   struct Row1;
14095                   struct Row33;
14096                   «ˇ
14097                   struct Row4;
14098                   struct» Row5;
14099                   «struct Row6;
14100                   ˇ»
14101                   struct Row99;
14102                   struct Row9;
14103                   struct Row10;"#},
14104        base_text,
14105        &mut cx,
14106    );
14107
14108    assert_hunk_revert(
14109        indoc! {r#"ˇstruct Row1.1;
14110                   struct Row1;
14111                   «ˇstr»uct Row22;
14112
14113                   struct ˇRow44;
14114                   struct Row5;
14115                   struct «Rˇ»ow66;ˇ
14116
14117                   «struˇ»ct Row88;
14118                   struct Row9;
14119                   struct Row1011;ˇ"#},
14120        vec![
14121            DiffHunkStatusKind::Modified,
14122            DiffHunkStatusKind::Modified,
14123            DiffHunkStatusKind::Modified,
14124            DiffHunkStatusKind::Modified,
14125            DiffHunkStatusKind::Modified,
14126            DiffHunkStatusKind::Modified,
14127        ],
14128        indoc! {r#"struct Row;
14129                   ˇstruct Row1;
14130                   struct Row2;
14131                   ˇ
14132                   struct Row4;
14133                   ˇstruct Row5;
14134                   struct Row6;
14135                   ˇ
14136                   struct Row8;
14137                   ˇstruct Row9;
14138                   struct Row10;ˇ"#},
14139        base_text,
14140        &mut cx,
14141    );
14142}
14143
14144#[gpui::test]
14145async fn test_deleting_over_diff_hunk(cx: &mut TestAppContext) {
14146    init_test(cx, |_| {});
14147    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
14148    let base_text = indoc! {r#"
14149        one
14150
14151        two
14152        three
14153        "#};
14154
14155    cx.set_head_text(base_text);
14156    cx.set_state("\nˇ\n");
14157    cx.executor().run_until_parked();
14158    cx.update_editor(|editor, _window, cx| {
14159        editor.expand_selected_diff_hunks(cx);
14160    });
14161    cx.executor().run_until_parked();
14162    cx.update_editor(|editor, window, cx| {
14163        editor.backspace(&Default::default(), window, cx);
14164    });
14165    cx.run_until_parked();
14166    cx.assert_state_with_diff(
14167        indoc! {r#"
14168
14169        - two
14170        - threeˇ
14171        +
14172        "#}
14173        .to_string(),
14174    );
14175}
14176
14177#[gpui::test]
14178async fn test_deletion_reverts(cx: &mut TestAppContext) {
14179    init_test(cx, |_| {});
14180    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
14181    let base_text = indoc! {r#"struct Row;
14182struct Row1;
14183struct Row2;
14184
14185struct Row4;
14186struct Row5;
14187struct Row6;
14188
14189struct Row8;
14190struct Row9;
14191struct Row10;"#};
14192
14193    // Deletion hunks trigger with carets on adjacent rows, so carets and selections have to stay farther to avoid the revert
14194    assert_hunk_revert(
14195        indoc! {r#"struct Row;
14196                   struct Row2;
14197
14198                   ˇstruct Row4;
14199                   struct Row5;
14200                   struct Row6;
14201                   ˇ
14202                   struct Row8;
14203                   struct Row10;"#},
14204        vec![DiffHunkStatusKind::Deleted, DiffHunkStatusKind::Deleted],
14205        indoc! {r#"struct Row;
14206                   struct Row2;
14207
14208                   ˇstruct Row4;
14209                   struct Row5;
14210                   struct Row6;
14211                   ˇ
14212                   struct Row8;
14213                   struct Row10;"#},
14214        base_text,
14215        &mut cx,
14216    );
14217    assert_hunk_revert(
14218        indoc! {r#"struct Row;
14219                   struct Row2;
14220
14221                   «ˇstruct Row4;
14222                   struct» Row5;
14223                   «struct Row6;
14224                   ˇ»
14225                   struct Row8;
14226                   struct Row10;"#},
14227        vec![DiffHunkStatusKind::Deleted, DiffHunkStatusKind::Deleted],
14228        indoc! {r#"struct Row;
14229                   struct Row2;
14230
14231                   «ˇstruct Row4;
14232                   struct» Row5;
14233                   «struct Row6;
14234                   ˇ»
14235                   struct Row8;
14236                   struct Row10;"#},
14237        base_text,
14238        &mut cx,
14239    );
14240
14241    // Deletion hunks are ephemeral, so it's impossible to place the caret into them — Zed triggers reverts for lines, adjacent to carets and selections.
14242    assert_hunk_revert(
14243        indoc! {r#"struct Row;
14244                   ˇstruct Row2;
14245
14246                   struct Row4;
14247                   struct Row5;
14248                   struct Row6;
14249
14250                   struct Row8;ˇ
14251                   struct Row10;"#},
14252        vec![DiffHunkStatusKind::Deleted, DiffHunkStatusKind::Deleted],
14253        indoc! {r#"struct Row;
14254                   struct Row1;
14255                   ˇstruct Row2;
14256
14257                   struct Row4;
14258                   struct Row5;
14259                   struct Row6;
14260
14261                   struct Row8;ˇ
14262                   struct Row9;
14263                   struct Row10;"#},
14264        base_text,
14265        &mut cx,
14266    );
14267    assert_hunk_revert(
14268        indoc! {r#"struct Row;
14269                   struct Row2«ˇ;
14270                   struct Row4;
14271                   struct» Row5;
14272                   «struct Row6;
14273
14274                   struct Row8;ˇ»
14275                   struct Row10;"#},
14276        vec![
14277            DiffHunkStatusKind::Deleted,
14278            DiffHunkStatusKind::Deleted,
14279            DiffHunkStatusKind::Deleted,
14280        ],
14281        indoc! {r#"struct Row;
14282                   struct Row1;
14283                   struct Row2«ˇ;
14284
14285                   struct Row4;
14286                   struct» Row5;
14287                   «struct Row6;
14288
14289                   struct Row8;ˇ»
14290                   struct Row9;
14291                   struct Row10;"#},
14292        base_text,
14293        &mut cx,
14294    );
14295}
14296
14297#[gpui::test]
14298async fn test_multibuffer_reverts(cx: &mut TestAppContext) {
14299    init_test(cx, |_| {});
14300
14301    let base_text_1 = "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj";
14302    let base_text_2 = "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu";
14303    let base_text_3 =
14304        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}";
14305
14306    let text_1 = edit_first_char_of_every_line(base_text_1);
14307    let text_2 = edit_first_char_of_every_line(base_text_2);
14308    let text_3 = edit_first_char_of_every_line(base_text_3);
14309
14310    let buffer_1 = cx.new(|cx| Buffer::local(text_1.clone(), cx));
14311    let buffer_2 = cx.new(|cx| Buffer::local(text_2.clone(), cx));
14312    let buffer_3 = cx.new(|cx| Buffer::local(text_3.clone(), cx));
14313
14314    let multibuffer = cx.new(|cx| {
14315        let mut multibuffer = MultiBuffer::new(ReadWrite);
14316        multibuffer.push_excerpts(
14317            buffer_1.clone(),
14318            [
14319                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14320                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14321                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14322            ],
14323            cx,
14324        );
14325        multibuffer.push_excerpts(
14326            buffer_2.clone(),
14327            [
14328                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14329                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14330                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14331            ],
14332            cx,
14333        );
14334        multibuffer.push_excerpts(
14335            buffer_3.clone(),
14336            [
14337                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14338                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14339                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14340            ],
14341            cx,
14342        );
14343        multibuffer
14344    });
14345
14346    let fs = FakeFs::new(cx.executor());
14347    let project = Project::test(fs, [path!("/").as_ref()], cx).await;
14348    let (editor, cx) = cx
14349        .add_window_view(|window, cx| build_editor_with_project(project, multibuffer, window, cx));
14350    editor.update_in(cx, |editor, _window, cx| {
14351        for (buffer, diff_base) in [
14352            (buffer_1.clone(), base_text_1),
14353            (buffer_2.clone(), base_text_2),
14354            (buffer_3.clone(), base_text_3),
14355        ] {
14356            let diff = cx.new(|cx| BufferDiff::new_with_base_text(&diff_base, &buffer, cx));
14357            editor
14358                .buffer
14359                .update(cx, |buffer, cx| buffer.add_diff(diff, cx));
14360        }
14361    });
14362    cx.executor().run_until_parked();
14363
14364    editor.update_in(cx, |editor, window, cx| {
14365        assert_eq!(editor.text(cx), "Xaaa\nXbbb\nXccc\n\nXfff\nXggg\n\nXjjj\nXlll\nXmmm\nXnnn\n\nXqqq\nXrrr\n\nXuuu\nXvvv\nXwww\nXxxx\n\nX{{{\nX|||\n\nX\u{7f}\u{7f}\u{7f}");
14366        editor.select_all(&SelectAll, window, cx);
14367        editor.git_restore(&Default::default(), window, cx);
14368    });
14369    cx.executor().run_until_parked();
14370
14371    // When all ranges are selected, all buffer hunks are reverted.
14372    editor.update(cx, |editor, cx| {
14373        assert_eq!(editor.text(cx), "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj\n\n\nllll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu\n\n\nvvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}\n\n");
14374    });
14375    buffer_1.update(cx, |buffer, _| {
14376        assert_eq!(buffer.text(), base_text_1);
14377    });
14378    buffer_2.update(cx, |buffer, _| {
14379        assert_eq!(buffer.text(), base_text_2);
14380    });
14381    buffer_3.update(cx, |buffer, _| {
14382        assert_eq!(buffer.text(), base_text_3);
14383    });
14384
14385    editor.update_in(cx, |editor, window, cx| {
14386        editor.undo(&Default::default(), window, cx);
14387    });
14388
14389    editor.update_in(cx, |editor, window, cx| {
14390        editor.change_selections(None, window, cx, |s| {
14391            s.select_ranges(Some(Point::new(0, 0)..Point::new(6, 0)));
14392        });
14393        editor.git_restore(&Default::default(), window, cx);
14394    });
14395
14396    // Now, when all ranges selected belong to buffer_1, the revert should succeed,
14397    // but not affect buffer_2 and its related excerpts.
14398    editor.update(cx, |editor, cx| {
14399        assert_eq!(
14400            editor.text(cx),
14401            "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj\n\n\nXlll\nXmmm\nXnnn\n\nXqqq\nXrrr\n\nXuuu\nXvvv\nXwww\nXxxx\n\nX{{{\nX|||\n\nX\u{7f}\u{7f}\u{7f}"
14402        );
14403    });
14404    buffer_1.update(cx, |buffer, _| {
14405        assert_eq!(buffer.text(), base_text_1);
14406    });
14407    buffer_2.update(cx, |buffer, _| {
14408        assert_eq!(
14409            buffer.text(),
14410            "Xlll\nXmmm\nXnnn\nXooo\nXppp\nXqqq\nXrrr\nXsss\nXttt\nXuuu"
14411        );
14412    });
14413    buffer_3.update(cx, |buffer, _| {
14414        assert_eq!(
14415            buffer.text(),
14416            "Xvvv\nXwww\nXxxx\nXyyy\nXzzz\nX{{{\nX|||\nX}}}\nX~~~\nX\u{7f}\u{7f}\u{7f}"
14417        );
14418    });
14419
14420    fn edit_first_char_of_every_line(text: &str) -> String {
14421        text.split('\n')
14422            .map(|line| format!("X{}", &line[1..]))
14423            .collect::<Vec<_>>()
14424            .join("\n")
14425    }
14426}
14427
14428#[gpui::test]
14429async fn test_mutlibuffer_in_navigation_history(cx: &mut TestAppContext) {
14430    init_test(cx, |_| {});
14431
14432    let cols = 4;
14433    let rows = 10;
14434    let sample_text_1 = sample_text(rows, cols, 'a');
14435    assert_eq!(
14436        sample_text_1,
14437        "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj"
14438    );
14439    let sample_text_2 = sample_text(rows, cols, 'l');
14440    assert_eq!(
14441        sample_text_2,
14442        "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu"
14443    );
14444    let sample_text_3 = sample_text(rows, cols, 'v');
14445    assert_eq!(
14446        sample_text_3,
14447        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}"
14448    );
14449
14450    let buffer_1 = cx.new(|cx| Buffer::local(sample_text_1.clone(), cx));
14451    let buffer_2 = cx.new(|cx| Buffer::local(sample_text_2.clone(), cx));
14452    let buffer_3 = cx.new(|cx| Buffer::local(sample_text_3.clone(), cx));
14453
14454    let multi_buffer = cx.new(|cx| {
14455        let mut multibuffer = MultiBuffer::new(ReadWrite);
14456        multibuffer.push_excerpts(
14457            buffer_1.clone(),
14458            [
14459                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14460                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14461                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14462            ],
14463            cx,
14464        );
14465        multibuffer.push_excerpts(
14466            buffer_2.clone(),
14467            [
14468                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14469                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14470                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14471            ],
14472            cx,
14473        );
14474        multibuffer.push_excerpts(
14475            buffer_3.clone(),
14476            [
14477                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14478                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14479                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
14480            ],
14481            cx,
14482        );
14483        multibuffer
14484    });
14485
14486    let fs = FakeFs::new(cx.executor());
14487    fs.insert_tree(
14488        "/a",
14489        json!({
14490            "main.rs": sample_text_1,
14491            "other.rs": sample_text_2,
14492            "lib.rs": sample_text_3,
14493        }),
14494    )
14495    .await;
14496    let project = Project::test(fs, ["/a".as_ref()], cx).await;
14497    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
14498    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
14499    let multi_buffer_editor = cx.new_window_entity(|window, cx| {
14500        Editor::new(
14501            EditorMode::full(),
14502            multi_buffer,
14503            Some(project.clone()),
14504            window,
14505            cx,
14506        )
14507    });
14508    let multibuffer_item_id = workspace
14509        .update(cx, |workspace, window, cx| {
14510            assert!(
14511                workspace.active_item(cx).is_none(),
14512                "active item should be None before the first item is added"
14513            );
14514            workspace.add_item_to_active_pane(
14515                Box::new(multi_buffer_editor.clone()),
14516                None,
14517                true,
14518                window,
14519                cx,
14520            );
14521            let active_item = workspace
14522                .active_item(cx)
14523                .expect("should have an active item after adding the multi buffer");
14524            assert!(
14525                !active_item.is_singleton(cx),
14526                "A multi buffer was expected to active after adding"
14527            );
14528            active_item.item_id()
14529        })
14530        .unwrap();
14531    cx.executor().run_until_parked();
14532
14533    multi_buffer_editor.update_in(cx, |editor, window, cx| {
14534        editor.change_selections(Some(Autoscroll::Next), window, cx, |s| {
14535            s.select_ranges(Some(1..2))
14536        });
14537        editor.open_excerpts(&OpenExcerpts, window, cx);
14538    });
14539    cx.executor().run_until_parked();
14540    let first_item_id = workspace
14541        .update(cx, |workspace, window, cx| {
14542            let active_item = workspace
14543                .active_item(cx)
14544                .expect("should have an active item after navigating into the 1st buffer");
14545            let first_item_id = active_item.item_id();
14546            assert_ne!(
14547                first_item_id, multibuffer_item_id,
14548                "Should navigate into the 1st buffer and activate it"
14549            );
14550            assert!(
14551                active_item.is_singleton(cx),
14552                "New active item should be a singleton buffer"
14553            );
14554            assert_eq!(
14555                active_item
14556                    .act_as::<Editor>(cx)
14557                    .expect("should have navigated into an editor for the 1st buffer")
14558                    .read(cx)
14559                    .text(cx),
14560                sample_text_1
14561            );
14562
14563            workspace
14564                .go_back(workspace.active_pane().downgrade(), window, cx)
14565                .detach_and_log_err(cx);
14566
14567            first_item_id
14568        })
14569        .unwrap();
14570    cx.executor().run_until_parked();
14571    workspace
14572        .update(cx, |workspace, _, cx| {
14573            let active_item = workspace
14574                .active_item(cx)
14575                .expect("should have an active item after navigating back");
14576            assert_eq!(
14577                active_item.item_id(),
14578                multibuffer_item_id,
14579                "Should navigate back to the multi buffer"
14580            );
14581            assert!(!active_item.is_singleton(cx));
14582        })
14583        .unwrap();
14584
14585    multi_buffer_editor.update_in(cx, |editor, window, cx| {
14586        editor.change_selections(Some(Autoscroll::Next), window, cx, |s| {
14587            s.select_ranges(Some(39..40))
14588        });
14589        editor.open_excerpts(&OpenExcerpts, window, cx);
14590    });
14591    cx.executor().run_until_parked();
14592    let second_item_id = workspace
14593        .update(cx, |workspace, window, cx| {
14594            let active_item = workspace
14595                .active_item(cx)
14596                .expect("should have an active item after navigating into the 2nd buffer");
14597            let second_item_id = active_item.item_id();
14598            assert_ne!(
14599                second_item_id, multibuffer_item_id,
14600                "Should navigate away from the multibuffer"
14601            );
14602            assert_ne!(
14603                second_item_id, first_item_id,
14604                "Should navigate into the 2nd buffer and activate it"
14605            );
14606            assert!(
14607                active_item.is_singleton(cx),
14608                "New active item should be a singleton buffer"
14609            );
14610            assert_eq!(
14611                active_item
14612                    .act_as::<Editor>(cx)
14613                    .expect("should have navigated into an editor")
14614                    .read(cx)
14615                    .text(cx),
14616                sample_text_2
14617            );
14618
14619            workspace
14620                .go_back(workspace.active_pane().downgrade(), window, cx)
14621                .detach_and_log_err(cx);
14622
14623            second_item_id
14624        })
14625        .unwrap();
14626    cx.executor().run_until_parked();
14627    workspace
14628        .update(cx, |workspace, _, cx| {
14629            let active_item = workspace
14630                .active_item(cx)
14631                .expect("should have an active item after navigating back from the 2nd buffer");
14632            assert_eq!(
14633                active_item.item_id(),
14634                multibuffer_item_id,
14635                "Should navigate back from the 2nd buffer to the multi buffer"
14636            );
14637            assert!(!active_item.is_singleton(cx));
14638        })
14639        .unwrap();
14640
14641    multi_buffer_editor.update_in(cx, |editor, window, cx| {
14642        editor.change_selections(Some(Autoscroll::Next), window, cx, |s| {
14643            s.select_ranges(Some(70..70))
14644        });
14645        editor.open_excerpts(&OpenExcerpts, window, cx);
14646    });
14647    cx.executor().run_until_parked();
14648    workspace
14649        .update(cx, |workspace, window, cx| {
14650            let active_item = workspace
14651                .active_item(cx)
14652                .expect("should have an active item after navigating into the 3rd buffer");
14653            let third_item_id = active_item.item_id();
14654            assert_ne!(
14655                third_item_id, multibuffer_item_id,
14656                "Should navigate into the 3rd buffer and activate it"
14657            );
14658            assert_ne!(third_item_id, first_item_id);
14659            assert_ne!(third_item_id, second_item_id);
14660            assert!(
14661                active_item.is_singleton(cx),
14662                "New active item should be a singleton buffer"
14663            );
14664            assert_eq!(
14665                active_item
14666                    .act_as::<Editor>(cx)
14667                    .expect("should have navigated into an editor")
14668                    .read(cx)
14669                    .text(cx),
14670                sample_text_3
14671            );
14672
14673            workspace
14674                .go_back(workspace.active_pane().downgrade(), window, cx)
14675                .detach_and_log_err(cx);
14676        })
14677        .unwrap();
14678    cx.executor().run_until_parked();
14679    workspace
14680        .update(cx, |workspace, _, cx| {
14681            let active_item = workspace
14682                .active_item(cx)
14683                .expect("should have an active item after navigating back from the 3rd buffer");
14684            assert_eq!(
14685                active_item.item_id(),
14686                multibuffer_item_id,
14687                "Should navigate back from the 3rd buffer to the multi buffer"
14688            );
14689            assert!(!active_item.is_singleton(cx));
14690        })
14691        .unwrap();
14692}
14693
14694#[gpui::test]
14695async fn test_toggle_selected_diff_hunks(executor: BackgroundExecutor, cx: &mut TestAppContext) {
14696    init_test(cx, |_| {});
14697
14698    let mut cx = EditorTestContext::new(cx).await;
14699
14700    let diff_base = r#"
14701        use some::mod;
14702
14703        const A: u32 = 42;
14704
14705        fn main() {
14706            println!("hello");
14707
14708            println!("world");
14709        }
14710        "#
14711    .unindent();
14712
14713    cx.set_state(
14714        &r#"
14715        use some::modified;
14716
14717        ˇ
14718        fn main() {
14719            println!("hello there");
14720
14721            println!("around the");
14722            println!("world");
14723        }
14724        "#
14725        .unindent(),
14726    );
14727
14728    cx.set_head_text(&diff_base);
14729    executor.run_until_parked();
14730
14731    cx.update_editor(|editor, window, cx| {
14732        editor.go_to_next_hunk(&GoToHunk, window, cx);
14733        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
14734    });
14735    executor.run_until_parked();
14736    cx.assert_state_with_diff(
14737        r#"
14738          use some::modified;
14739
14740
14741          fn main() {
14742        -     println!("hello");
14743        + ˇ    println!("hello there");
14744
14745              println!("around the");
14746              println!("world");
14747          }
14748        "#
14749        .unindent(),
14750    );
14751
14752    cx.update_editor(|editor, window, cx| {
14753        for _ in 0..2 {
14754            editor.go_to_next_hunk(&GoToHunk, window, cx);
14755            editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
14756        }
14757    });
14758    executor.run_until_parked();
14759    cx.assert_state_with_diff(
14760        r#"
14761        - use some::mod;
14762        + ˇuse some::modified;
14763
14764
14765          fn main() {
14766        -     println!("hello");
14767        +     println!("hello there");
14768
14769        +     println!("around the");
14770              println!("world");
14771          }
14772        "#
14773        .unindent(),
14774    );
14775
14776    cx.update_editor(|editor, window, cx| {
14777        editor.go_to_next_hunk(&GoToHunk, window, cx);
14778        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
14779    });
14780    executor.run_until_parked();
14781    cx.assert_state_with_diff(
14782        r#"
14783        - use some::mod;
14784        + use some::modified;
14785
14786        - const A: u32 = 42;
14787          ˇ
14788          fn main() {
14789        -     println!("hello");
14790        +     println!("hello there");
14791
14792        +     println!("around the");
14793              println!("world");
14794          }
14795        "#
14796        .unindent(),
14797    );
14798
14799    cx.update_editor(|editor, window, cx| {
14800        editor.cancel(&Cancel, window, cx);
14801    });
14802
14803    cx.assert_state_with_diff(
14804        r#"
14805          use some::modified;
14806
14807          ˇ
14808          fn main() {
14809              println!("hello there");
14810
14811              println!("around the");
14812              println!("world");
14813          }
14814        "#
14815        .unindent(),
14816    );
14817}
14818
14819#[gpui::test]
14820async fn test_diff_base_change_with_expanded_diff_hunks(
14821    executor: BackgroundExecutor,
14822    cx: &mut TestAppContext,
14823) {
14824    init_test(cx, |_| {});
14825
14826    let mut cx = EditorTestContext::new(cx).await;
14827
14828    let diff_base = r#"
14829        use some::mod1;
14830        use some::mod2;
14831
14832        const A: u32 = 42;
14833        const B: u32 = 42;
14834        const C: u32 = 42;
14835
14836        fn main() {
14837            println!("hello");
14838
14839            println!("world");
14840        }
14841        "#
14842    .unindent();
14843
14844    cx.set_state(
14845        &r#"
14846        use some::mod2;
14847
14848        const A: u32 = 42;
14849        const C: u32 = 42;
14850
14851        fn main(ˇ) {
14852            //println!("hello");
14853
14854            println!("world");
14855            //
14856            //
14857        }
14858        "#
14859        .unindent(),
14860    );
14861
14862    cx.set_head_text(&diff_base);
14863    executor.run_until_parked();
14864
14865    cx.update_editor(|editor, window, cx| {
14866        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
14867    });
14868    executor.run_until_parked();
14869    cx.assert_state_with_diff(
14870        r#"
14871        - use some::mod1;
14872          use some::mod2;
14873
14874          const A: u32 = 42;
14875        - const B: u32 = 42;
14876          const C: u32 = 42;
14877
14878          fn main(ˇ) {
14879        -     println!("hello");
14880        +     //println!("hello");
14881
14882              println!("world");
14883        +     //
14884        +     //
14885          }
14886        "#
14887        .unindent(),
14888    );
14889
14890    cx.set_head_text("new diff base!");
14891    executor.run_until_parked();
14892    cx.assert_state_with_diff(
14893        r#"
14894        - new diff base!
14895        + use some::mod2;
14896        +
14897        + const A: u32 = 42;
14898        + const C: u32 = 42;
14899        +
14900        + fn main(ˇ) {
14901        +     //println!("hello");
14902        +
14903        +     println!("world");
14904        +     //
14905        +     //
14906        + }
14907        "#
14908        .unindent(),
14909    );
14910}
14911
14912#[gpui::test]
14913async fn test_toggle_diff_expand_in_multi_buffer(cx: &mut TestAppContext) {
14914    init_test(cx, |_| {});
14915
14916    let file_1_old = "aaa\nbbb\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj";
14917    let file_1_new = "aaa\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj";
14918    let file_2_old = "lll\nmmm\nnnn\nooo\nppp\nqqq\nrrr\nsss\nttt\nuuu";
14919    let file_2_new = "lll\nmmm\nNNN\nooo\nppp\nqqq\nrrr\nsss\nttt\nuuu";
14920    let file_3_old = "111\n222\n333\n444\n555\n777\n888\n999\n000\n!!!";
14921    let file_3_new = "111\n222\n333\n444\n555\n666\n777\n888\n999\n000\n!!!";
14922
14923    let buffer_1 = cx.new(|cx| Buffer::local(file_1_new.to_string(), cx));
14924    let buffer_2 = cx.new(|cx| Buffer::local(file_2_new.to_string(), cx));
14925    let buffer_3 = cx.new(|cx| Buffer::local(file_3_new.to_string(), cx));
14926
14927    let multi_buffer = cx.new(|cx| {
14928        let mut multibuffer = MultiBuffer::new(ReadWrite);
14929        multibuffer.push_excerpts(
14930            buffer_1.clone(),
14931            [
14932                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14933                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14934                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 3)),
14935            ],
14936            cx,
14937        );
14938        multibuffer.push_excerpts(
14939            buffer_2.clone(),
14940            [
14941                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14942                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14943                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 3)),
14944            ],
14945            cx,
14946        );
14947        multibuffer.push_excerpts(
14948            buffer_3.clone(),
14949            [
14950                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
14951                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
14952                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 3)),
14953            ],
14954            cx,
14955        );
14956        multibuffer
14957    });
14958
14959    let editor =
14960        cx.add_window(|window, cx| Editor::new(EditorMode::full(), multi_buffer, None, window, cx));
14961    editor
14962        .update(cx, |editor, _window, cx| {
14963            for (buffer, diff_base) in [
14964                (buffer_1.clone(), file_1_old),
14965                (buffer_2.clone(), file_2_old),
14966                (buffer_3.clone(), file_3_old),
14967            ] {
14968                let diff = cx.new(|cx| BufferDiff::new_with_base_text(&diff_base, &buffer, cx));
14969                editor
14970                    .buffer
14971                    .update(cx, |buffer, cx| buffer.add_diff(diff, cx));
14972            }
14973        })
14974        .unwrap();
14975
14976    let mut cx = EditorTestContext::for_editor(editor, cx).await;
14977    cx.run_until_parked();
14978
14979    cx.assert_editor_state(
14980        &"
14981            ˇaaa
14982            ccc
14983            ddd
14984
14985            ggg
14986            hhh
14987
14988
14989            lll
14990            mmm
14991            NNN
14992
14993            qqq
14994            rrr
14995
14996            uuu
14997            111
14998            222
14999            333
15000
15001            666
15002            777
15003
15004            000
15005            !!!"
15006        .unindent(),
15007    );
15008
15009    cx.update_editor(|editor, window, cx| {
15010        editor.select_all(&SelectAll, window, cx);
15011        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
15012    });
15013    cx.executor().run_until_parked();
15014
15015    cx.assert_state_with_diff(
15016        "
15017            «aaa
15018          - bbb
15019            ccc
15020            ddd
15021
15022            ggg
15023            hhh
15024
15025
15026            lll
15027            mmm
15028          - nnn
15029          + NNN
15030
15031            qqq
15032            rrr
15033
15034            uuu
15035            111
15036            222
15037            333
15038
15039          + 666
15040            777
15041
15042            000
15043            !!!ˇ»"
15044            .unindent(),
15045    );
15046}
15047
15048#[gpui::test]
15049async fn test_expand_diff_hunk_at_excerpt_boundary(cx: &mut TestAppContext) {
15050    init_test(cx, |_| {});
15051
15052    let base = "aaa\nbbb\nccc\nddd\neee\nfff\nggg\n";
15053    let text = "aaa\nBBB\nBB2\nccc\nDDD\nEEE\nfff\nggg\nhhh\niii\n";
15054
15055    let buffer = cx.new(|cx| Buffer::local(text.to_string(), cx));
15056    let multi_buffer = cx.new(|cx| {
15057        let mut multibuffer = MultiBuffer::new(ReadWrite);
15058        multibuffer.push_excerpts(
15059            buffer.clone(),
15060            [
15061                ExcerptRange::new(Point::new(0, 0)..Point::new(2, 0)),
15062                ExcerptRange::new(Point::new(4, 0)..Point::new(7, 0)),
15063                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 0)),
15064            ],
15065            cx,
15066        );
15067        multibuffer
15068    });
15069
15070    let editor =
15071        cx.add_window(|window, cx| Editor::new(EditorMode::full(), multi_buffer, None, window, cx));
15072    editor
15073        .update(cx, |editor, _window, cx| {
15074            let diff = cx.new(|cx| BufferDiff::new_with_base_text(base, &buffer, cx));
15075            editor
15076                .buffer
15077                .update(cx, |buffer, cx| buffer.add_diff(diff, cx))
15078        })
15079        .unwrap();
15080
15081    let mut cx = EditorTestContext::for_editor(editor, cx).await;
15082    cx.run_until_parked();
15083
15084    cx.update_editor(|editor, window, cx| {
15085        editor.expand_all_diff_hunks(&Default::default(), window, cx)
15086    });
15087    cx.executor().run_until_parked();
15088
15089    // When the start of a hunk coincides with the start of its excerpt,
15090    // the hunk is expanded. When the start of a a hunk is earlier than
15091    // the start of its excerpt, the hunk is not expanded.
15092    cx.assert_state_with_diff(
15093        "
15094            ˇaaa
15095          - bbb
15096          + BBB
15097
15098          - ddd
15099          - eee
15100          + DDD
15101          + EEE
15102            fff
15103
15104            iii
15105        "
15106        .unindent(),
15107    );
15108}
15109
15110#[gpui::test]
15111async fn test_edits_around_expanded_insertion_hunks(
15112    executor: BackgroundExecutor,
15113    cx: &mut TestAppContext,
15114) {
15115    init_test(cx, |_| {});
15116
15117    let mut cx = EditorTestContext::new(cx).await;
15118
15119    let diff_base = r#"
15120        use some::mod1;
15121        use some::mod2;
15122
15123        const A: u32 = 42;
15124
15125        fn main() {
15126            println!("hello");
15127
15128            println!("world");
15129        }
15130        "#
15131    .unindent();
15132    executor.run_until_parked();
15133    cx.set_state(
15134        &r#"
15135        use some::mod1;
15136        use some::mod2;
15137
15138        const A: u32 = 42;
15139        const B: u32 = 42;
15140        const C: u32 = 42;
15141        ˇ
15142
15143        fn main() {
15144            println!("hello");
15145
15146            println!("world");
15147        }
15148        "#
15149        .unindent(),
15150    );
15151
15152    cx.set_head_text(&diff_base);
15153    executor.run_until_parked();
15154
15155    cx.update_editor(|editor, window, cx| {
15156        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
15157    });
15158    executor.run_until_parked();
15159
15160    cx.assert_state_with_diff(
15161        r#"
15162        use some::mod1;
15163        use some::mod2;
15164
15165        const A: u32 = 42;
15166      + const B: u32 = 42;
15167      + const C: u32 = 42;
15168      + ˇ
15169
15170        fn main() {
15171            println!("hello");
15172
15173            println!("world");
15174        }
15175      "#
15176        .unindent(),
15177    );
15178
15179    cx.update_editor(|editor, window, cx| editor.handle_input("const D: u32 = 42;\n", window, cx));
15180    executor.run_until_parked();
15181
15182    cx.assert_state_with_diff(
15183        r#"
15184        use some::mod1;
15185        use some::mod2;
15186
15187        const A: u32 = 42;
15188      + const B: u32 = 42;
15189      + const C: u32 = 42;
15190      + const D: u32 = 42;
15191      + ˇ
15192
15193        fn main() {
15194            println!("hello");
15195
15196            println!("world");
15197        }
15198      "#
15199        .unindent(),
15200    );
15201
15202    cx.update_editor(|editor, window, cx| editor.handle_input("const E: u32 = 42;\n", window, cx));
15203    executor.run_until_parked();
15204
15205    cx.assert_state_with_diff(
15206        r#"
15207        use some::mod1;
15208        use some::mod2;
15209
15210        const A: u32 = 42;
15211      + const B: u32 = 42;
15212      + const C: u32 = 42;
15213      + const D: u32 = 42;
15214      + const E: u32 = 42;
15215      + ˇ
15216
15217        fn main() {
15218            println!("hello");
15219
15220            println!("world");
15221        }
15222      "#
15223        .unindent(),
15224    );
15225
15226    cx.update_editor(|editor, window, cx| {
15227        editor.delete_line(&DeleteLine, window, cx);
15228    });
15229    executor.run_until_parked();
15230
15231    cx.assert_state_with_diff(
15232        r#"
15233        use some::mod1;
15234        use some::mod2;
15235
15236        const A: u32 = 42;
15237      + const B: u32 = 42;
15238      + const C: u32 = 42;
15239      + const D: u32 = 42;
15240      + const E: u32 = 42;
15241        ˇ
15242        fn main() {
15243            println!("hello");
15244
15245            println!("world");
15246        }
15247      "#
15248        .unindent(),
15249    );
15250
15251    cx.update_editor(|editor, window, cx| {
15252        editor.move_up(&MoveUp, window, cx);
15253        editor.delete_line(&DeleteLine, window, cx);
15254        editor.move_up(&MoveUp, window, cx);
15255        editor.delete_line(&DeleteLine, window, cx);
15256        editor.move_up(&MoveUp, window, cx);
15257        editor.delete_line(&DeleteLine, window, cx);
15258    });
15259    executor.run_until_parked();
15260    cx.assert_state_with_diff(
15261        r#"
15262        use some::mod1;
15263        use some::mod2;
15264
15265        const A: u32 = 42;
15266      + const B: u32 = 42;
15267        ˇ
15268        fn main() {
15269            println!("hello");
15270
15271            println!("world");
15272        }
15273      "#
15274        .unindent(),
15275    );
15276
15277    cx.update_editor(|editor, window, cx| {
15278        editor.select_up_by_lines(&SelectUpByLines { lines: 5 }, window, cx);
15279        editor.delete_line(&DeleteLine, window, cx);
15280    });
15281    executor.run_until_parked();
15282    cx.assert_state_with_diff(
15283        r#"
15284        ˇ
15285        fn main() {
15286            println!("hello");
15287
15288            println!("world");
15289        }
15290      "#
15291        .unindent(),
15292    );
15293}
15294
15295#[gpui::test]
15296async fn test_toggling_adjacent_diff_hunks(cx: &mut TestAppContext) {
15297    init_test(cx, |_| {});
15298
15299    let mut cx = EditorTestContext::new(cx).await;
15300    cx.set_head_text(indoc! { "
15301        one
15302        two
15303        three
15304        four
15305        five
15306        "
15307    });
15308    cx.set_state(indoc! { "
15309        one
15310        ˇthree
15311        five
15312    "});
15313    cx.run_until_parked();
15314    cx.update_editor(|editor, window, cx| {
15315        editor.toggle_selected_diff_hunks(&Default::default(), window, cx);
15316    });
15317    cx.assert_state_with_diff(
15318        indoc! { "
15319        one
15320      - two
15321        ˇthree
15322      - four
15323        five
15324    "}
15325        .to_string(),
15326    );
15327    cx.update_editor(|editor, window, cx| {
15328        editor.toggle_selected_diff_hunks(&Default::default(), window, cx);
15329    });
15330
15331    cx.assert_state_with_diff(
15332        indoc! { "
15333        one
15334        ˇthree
15335        five
15336    "}
15337        .to_string(),
15338    );
15339
15340    cx.set_state(indoc! { "
15341        one
15342        ˇTWO
15343        three
15344        four
15345        five
15346    "});
15347    cx.run_until_parked();
15348    cx.update_editor(|editor, window, cx| {
15349        editor.toggle_selected_diff_hunks(&Default::default(), window, cx);
15350    });
15351
15352    cx.assert_state_with_diff(
15353        indoc! { "
15354            one
15355          - two
15356          + ˇTWO
15357            three
15358            four
15359            five
15360        "}
15361        .to_string(),
15362    );
15363    cx.update_editor(|editor, window, cx| {
15364        editor.move_up(&Default::default(), window, cx);
15365        editor.toggle_selected_diff_hunks(&Default::default(), window, cx);
15366    });
15367    cx.assert_state_with_diff(
15368        indoc! { "
15369            one
15370            ˇTWO
15371            three
15372            four
15373            five
15374        "}
15375        .to_string(),
15376    );
15377}
15378
15379#[gpui::test]
15380async fn test_edits_around_expanded_deletion_hunks(
15381    executor: BackgroundExecutor,
15382    cx: &mut TestAppContext,
15383) {
15384    init_test(cx, |_| {});
15385
15386    let mut cx = EditorTestContext::new(cx).await;
15387
15388    let diff_base = r#"
15389        use some::mod1;
15390        use some::mod2;
15391
15392        const A: u32 = 42;
15393        const B: u32 = 42;
15394        const C: u32 = 42;
15395
15396
15397        fn main() {
15398            println!("hello");
15399
15400            println!("world");
15401        }
15402    "#
15403    .unindent();
15404    executor.run_until_parked();
15405    cx.set_state(
15406        &r#"
15407        use some::mod1;
15408        use some::mod2;
15409
15410        ˇconst B: u32 = 42;
15411        const C: u32 = 42;
15412
15413
15414        fn main() {
15415            println!("hello");
15416
15417            println!("world");
15418        }
15419        "#
15420        .unindent(),
15421    );
15422
15423    cx.set_head_text(&diff_base);
15424    executor.run_until_parked();
15425
15426    cx.update_editor(|editor, window, cx| {
15427        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
15428    });
15429    executor.run_until_parked();
15430
15431    cx.assert_state_with_diff(
15432        r#"
15433        use some::mod1;
15434        use some::mod2;
15435
15436      - const A: u32 = 42;
15437        ˇconst B: u32 = 42;
15438        const C: u32 = 42;
15439
15440
15441        fn main() {
15442            println!("hello");
15443
15444            println!("world");
15445        }
15446      "#
15447        .unindent(),
15448    );
15449
15450    cx.update_editor(|editor, window, cx| {
15451        editor.delete_line(&DeleteLine, window, cx);
15452    });
15453    executor.run_until_parked();
15454    cx.assert_state_with_diff(
15455        r#"
15456        use some::mod1;
15457        use some::mod2;
15458
15459      - const A: u32 = 42;
15460      - const B: u32 = 42;
15461        ˇconst C: u32 = 42;
15462
15463
15464        fn main() {
15465            println!("hello");
15466
15467            println!("world");
15468        }
15469      "#
15470        .unindent(),
15471    );
15472
15473    cx.update_editor(|editor, window, cx| {
15474        editor.delete_line(&DeleteLine, window, cx);
15475    });
15476    executor.run_until_parked();
15477    cx.assert_state_with_diff(
15478        r#"
15479        use some::mod1;
15480        use some::mod2;
15481
15482      - const A: u32 = 42;
15483      - const B: u32 = 42;
15484      - const C: u32 = 42;
15485        ˇ
15486
15487        fn main() {
15488            println!("hello");
15489
15490            println!("world");
15491        }
15492      "#
15493        .unindent(),
15494    );
15495
15496    cx.update_editor(|editor, window, cx| {
15497        editor.handle_input("replacement", window, cx);
15498    });
15499    executor.run_until_parked();
15500    cx.assert_state_with_diff(
15501        r#"
15502        use some::mod1;
15503        use some::mod2;
15504
15505      - const A: u32 = 42;
15506      - const B: u32 = 42;
15507      - const C: u32 = 42;
15508      -
15509      + replacementˇ
15510
15511        fn main() {
15512            println!("hello");
15513
15514            println!("world");
15515        }
15516      "#
15517        .unindent(),
15518    );
15519}
15520
15521#[gpui::test]
15522async fn test_backspace_after_deletion_hunk(executor: BackgroundExecutor, cx: &mut TestAppContext) {
15523    init_test(cx, |_| {});
15524
15525    let mut cx = EditorTestContext::new(cx).await;
15526
15527    let base_text = r#"
15528        one
15529        two
15530        three
15531        four
15532        five
15533    "#
15534    .unindent();
15535    executor.run_until_parked();
15536    cx.set_state(
15537        &r#"
15538        one
15539        two
15540        fˇour
15541        five
15542        "#
15543        .unindent(),
15544    );
15545
15546    cx.set_head_text(&base_text);
15547    executor.run_until_parked();
15548
15549    cx.update_editor(|editor, window, cx| {
15550        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
15551    });
15552    executor.run_until_parked();
15553
15554    cx.assert_state_with_diff(
15555        r#"
15556          one
15557          two
15558        - three
15559          fˇour
15560          five
15561        "#
15562        .unindent(),
15563    );
15564
15565    cx.update_editor(|editor, window, cx| {
15566        editor.backspace(&Backspace, window, cx);
15567        editor.backspace(&Backspace, window, cx);
15568    });
15569    executor.run_until_parked();
15570    cx.assert_state_with_diff(
15571        r#"
15572          one
15573          two
15574        - threeˇ
15575        - four
15576        + our
15577          five
15578        "#
15579        .unindent(),
15580    );
15581}
15582
15583#[gpui::test]
15584async fn test_edit_after_expanded_modification_hunk(
15585    executor: BackgroundExecutor,
15586    cx: &mut TestAppContext,
15587) {
15588    init_test(cx, |_| {});
15589
15590    let mut cx = EditorTestContext::new(cx).await;
15591
15592    let diff_base = r#"
15593        use some::mod1;
15594        use some::mod2;
15595
15596        const A: u32 = 42;
15597        const B: u32 = 42;
15598        const C: u32 = 42;
15599        const D: u32 = 42;
15600
15601
15602        fn main() {
15603            println!("hello");
15604
15605            println!("world");
15606        }"#
15607    .unindent();
15608
15609    cx.set_state(
15610        &r#"
15611        use some::mod1;
15612        use some::mod2;
15613
15614        const A: u32 = 42;
15615        const B: u32 = 42;
15616        const C: u32 = 43ˇ
15617        const D: u32 = 42;
15618
15619
15620        fn main() {
15621            println!("hello");
15622
15623            println!("world");
15624        }"#
15625        .unindent(),
15626    );
15627
15628    cx.set_head_text(&diff_base);
15629    executor.run_until_parked();
15630    cx.update_editor(|editor, window, cx| {
15631        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
15632    });
15633    executor.run_until_parked();
15634
15635    cx.assert_state_with_diff(
15636        r#"
15637        use some::mod1;
15638        use some::mod2;
15639
15640        const A: u32 = 42;
15641        const B: u32 = 42;
15642      - const C: u32 = 42;
15643      + const C: u32 = 43ˇ
15644        const D: u32 = 42;
15645
15646
15647        fn main() {
15648            println!("hello");
15649
15650            println!("world");
15651        }"#
15652        .unindent(),
15653    );
15654
15655    cx.update_editor(|editor, window, cx| {
15656        editor.handle_input("\nnew_line\n", window, cx);
15657    });
15658    executor.run_until_parked();
15659
15660    cx.assert_state_with_diff(
15661        r#"
15662        use some::mod1;
15663        use some::mod2;
15664
15665        const A: u32 = 42;
15666        const B: u32 = 42;
15667      - const C: u32 = 42;
15668      + const C: u32 = 43
15669      + new_line
15670      + ˇ
15671        const D: u32 = 42;
15672
15673
15674        fn main() {
15675            println!("hello");
15676
15677            println!("world");
15678        }"#
15679        .unindent(),
15680    );
15681}
15682
15683#[gpui::test]
15684async fn test_stage_and_unstage_added_file_hunk(
15685    executor: BackgroundExecutor,
15686    cx: &mut TestAppContext,
15687) {
15688    init_test(cx, |_| {});
15689
15690    let mut cx = EditorTestContext::new(cx).await;
15691    cx.update_editor(|editor, _, cx| {
15692        editor.set_expand_all_diff_hunks(cx);
15693    });
15694
15695    let working_copy = r#"
15696            ˇfn main() {
15697                println!("hello, world!");
15698            }
15699        "#
15700    .unindent();
15701
15702    cx.set_state(&working_copy);
15703    executor.run_until_parked();
15704
15705    cx.assert_state_with_diff(
15706        r#"
15707            + ˇfn main() {
15708            +     println!("hello, world!");
15709            + }
15710        "#
15711        .unindent(),
15712    );
15713    cx.assert_index_text(None);
15714
15715    cx.update_editor(|editor, window, cx| {
15716        editor.toggle_staged_selected_diff_hunks(&Default::default(), window, cx);
15717    });
15718    executor.run_until_parked();
15719    cx.assert_index_text(Some(&working_copy.replace("ˇ", "")));
15720    cx.assert_state_with_diff(
15721        r#"
15722            + ˇfn main() {
15723            +     println!("hello, world!");
15724            + }
15725        "#
15726        .unindent(),
15727    );
15728
15729    cx.update_editor(|editor, window, cx| {
15730        editor.toggle_staged_selected_diff_hunks(&Default::default(), window, cx);
15731    });
15732    executor.run_until_parked();
15733    cx.assert_index_text(None);
15734}
15735
15736async fn setup_indent_guides_editor(
15737    text: &str,
15738    cx: &mut TestAppContext,
15739) -> (BufferId, EditorTestContext) {
15740    init_test(cx, |_| {});
15741
15742    let mut cx = EditorTestContext::new(cx).await;
15743
15744    let buffer_id = cx.update_editor(|editor, window, cx| {
15745        editor.set_text(text, window, cx);
15746        let buffer_ids = editor.buffer().read(cx).excerpt_buffer_ids();
15747
15748        buffer_ids[0]
15749    });
15750
15751    (buffer_id, cx)
15752}
15753
15754fn assert_indent_guides(
15755    range: Range<u32>,
15756    expected: Vec<IndentGuide>,
15757    active_indices: Option<Vec<usize>>,
15758    cx: &mut EditorTestContext,
15759) {
15760    let indent_guides = cx.update_editor(|editor, window, cx| {
15761        let snapshot = editor.snapshot(window, cx).display_snapshot;
15762        let mut indent_guides: Vec<_> = crate::indent_guides::indent_guides_in_range(
15763            editor,
15764            MultiBufferRow(range.start)..MultiBufferRow(range.end),
15765            true,
15766            &snapshot,
15767            cx,
15768        );
15769
15770        indent_guides.sort_by(|a, b| {
15771            a.depth.cmp(&b.depth).then(
15772                a.start_row
15773                    .cmp(&b.start_row)
15774                    .then(a.end_row.cmp(&b.end_row)),
15775            )
15776        });
15777        indent_guides
15778    });
15779
15780    if let Some(expected) = active_indices {
15781        let active_indices = cx.update_editor(|editor, window, cx| {
15782            let snapshot = editor.snapshot(window, cx).display_snapshot;
15783            editor.find_active_indent_guide_indices(&indent_guides, &snapshot, window, cx)
15784        });
15785
15786        assert_eq!(
15787            active_indices.unwrap().into_iter().collect::<Vec<_>>(),
15788            expected,
15789            "Active indent guide indices do not match"
15790        );
15791    }
15792
15793    assert_eq!(indent_guides, expected, "Indent guides do not match");
15794}
15795
15796fn indent_guide(buffer_id: BufferId, start_row: u32, end_row: u32, depth: u32) -> IndentGuide {
15797    IndentGuide {
15798        buffer_id,
15799        start_row: MultiBufferRow(start_row),
15800        end_row: MultiBufferRow(end_row),
15801        depth,
15802        tab_size: 4,
15803        settings: IndentGuideSettings {
15804            enabled: true,
15805            line_width: 1,
15806            active_line_width: 1,
15807            ..Default::default()
15808        },
15809    }
15810}
15811
15812#[gpui::test]
15813async fn test_indent_guide_single_line(cx: &mut TestAppContext) {
15814    let (buffer_id, mut cx) = setup_indent_guides_editor(
15815        &"
15816    fn main() {
15817        let a = 1;
15818    }"
15819        .unindent(),
15820        cx,
15821    )
15822    .await;
15823
15824    assert_indent_guides(0..3, vec![indent_guide(buffer_id, 1, 1, 0)], None, &mut cx);
15825}
15826
15827#[gpui::test]
15828async fn test_indent_guide_simple_block(cx: &mut TestAppContext) {
15829    let (buffer_id, mut cx) = setup_indent_guides_editor(
15830        &"
15831    fn main() {
15832        let a = 1;
15833        let b = 2;
15834    }"
15835        .unindent(),
15836        cx,
15837    )
15838    .await;
15839
15840    assert_indent_guides(0..4, vec![indent_guide(buffer_id, 1, 2, 0)], None, &mut cx);
15841}
15842
15843#[gpui::test]
15844async fn test_indent_guide_nested(cx: &mut TestAppContext) {
15845    let (buffer_id, mut cx) = setup_indent_guides_editor(
15846        &"
15847    fn main() {
15848        let a = 1;
15849        if a == 3 {
15850            let b = 2;
15851        } else {
15852            let c = 3;
15853        }
15854    }"
15855        .unindent(),
15856        cx,
15857    )
15858    .await;
15859
15860    assert_indent_guides(
15861        0..8,
15862        vec![
15863            indent_guide(buffer_id, 1, 6, 0),
15864            indent_guide(buffer_id, 3, 3, 1),
15865            indent_guide(buffer_id, 5, 5, 1),
15866        ],
15867        None,
15868        &mut cx,
15869    );
15870}
15871
15872#[gpui::test]
15873async fn test_indent_guide_tab(cx: &mut TestAppContext) {
15874    let (buffer_id, mut cx) = setup_indent_guides_editor(
15875        &"
15876    fn main() {
15877        let a = 1;
15878            let b = 2;
15879        let c = 3;
15880    }"
15881        .unindent(),
15882        cx,
15883    )
15884    .await;
15885
15886    assert_indent_guides(
15887        0..5,
15888        vec![
15889            indent_guide(buffer_id, 1, 3, 0),
15890            indent_guide(buffer_id, 2, 2, 1),
15891        ],
15892        None,
15893        &mut cx,
15894    );
15895}
15896
15897#[gpui::test]
15898async fn test_indent_guide_continues_on_empty_line(cx: &mut TestAppContext) {
15899    let (buffer_id, mut cx) = setup_indent_guides_editor(
15900        &"
15901        fn main() {
15902            let a = 1;
15903
15904            let c = 3;
15905        }"
15906        .unindent(),
15907        cx,
15908    )
15909    .await;
15910
15911    assert_indent_guides(0..5, vec![indent_guide(buffer_id, 1, 3, 0)], None, &mut cx);
15912}
15913
15914#[gpui::test]
15915async fn test_indent_guide_complex(cx: &mut TestAppContext) {
15916    let (buffer_id, mut cx) = setup_indent_guides_editor(
15917        &"
15918        fn main() {
15919            let a = 1;
15920
15921            let c = 3;
15922
15923            if a == 3 {
15924                let b = 2;
15925            } else {
15926                let c = 3;
15927            }
15928        }"
15929        .unindent(),
15930        cx,
15931    )
15932    .await;
15933
15934    assert_indent_guides(
15935        0..11,
15936        vec![
15937            indent_guide(buffer_id, 1, 9, 0),
15938            indent_guide(buffer_id, 6, 6, 1),
15939            indent_guide(buffer_id, 8, 8, 1),
15940        ],
15941        None,
15942        &mut cx,
15943    );
15944}
15945
15946#[gpui::test]
15947async fn test_indent_guide_starts_off_screen(cx: &mut TestAppContext) {
15948    let (buffer_id, mut cx) = setup_indent_guides_editor(
15949        &"
15950        fn main() {
15951            let a = 1;
15952
15953            let c = 3;
15954
15955            if a == 3 {
15956                let b = 2;
15957            } else {
15958                let c = 3;
15959            }
15960        }"
15961        .unindent(),
15962        cx,
15963    )
15964    .await;
15965
15966    assert_indent_guides(
15967        1..11,
15968        vec![
15969            indent_guide(buffer_id, 1, 9, 0),
15970            indent_guide(buffer_id, 6, 6, 1),
15971            indent_guide(buffer_id, 8, 8, 1),
15972        ],
15973        None,
15974        &mut cx,
15975    );
15976}
15977
15978#[gpui::test]
15979async fn test_indent_guide_ends_off_screen(cx: &mut TestAppContext) {
15980    let (buffer_id, mut cx) = setup_indent_guides_editor(
15981        &"
15982        fn main() {
15983            let a = 1;
15984
15985            let c = 3;
15986
15987            if a == 3 {
15988                let b = 2;
15989            } else {
15990                let c = 3;
15991            }
15992        }"
15993        .unindent(),
15994        cx,
15995    )
15996    .await;
15997
15998    assert_indent_guides(
15999        1..10,
16000        vec![
16001            indent_guide(buffer_id, 1, 9, 0),
16002            indent_guide(buffer_id, 6, 6, 1),
16003            indent_guide(buffer_id, 8, 8, 1),
16004        ],
16005        None,
16006        &mut cx,
16007    );
16008}
16009
16010#[gpui::test]
16011async fn test_indent_guide_without_brackets(cx: &mut TestAppContext) {
16012    let (buffer_id, mut cx) = setup_indent_guides_editor(
16013        &"
16014        block1
16015            block2
16016                block3
16017                    block4
16018            block2
16019        block1
16020        block1"
16021            .unindent(),
16022        cx,
16023    )
16024    .await;
16025
16026    assert_indent_guides(
16027        1..10,
16028        vec![
16029            indent_guide(buffer_id, 1, 4, 0),
16030            indent_guide(buffer_id, 2, 3, 1),
16031            indent_guide(buffer_id, 3, 3, 2),
16032        ],
16033        None,
16034        &mut cx,
16035    );
16036}
16037
16038#[gpui::test]
16039async fn test_indent_guide_ends_before_empty_line(cx: &mut TestAppContext) {
16040    let (buffer_id, mut cx) = setup_indent_guides_editor(
16041        &"
16042        block1
16043            block2
16044                block3
16045
16046        block1
16047        block1"
16048            .unindent(),
16049        cx,
16050    )
16051    .await;
16052
16053    assert_indent_guides(
16054        0..6,
16055        vec![
16056            indent_guide(buffer_id, 1, 2, 0),
16057            indent_guide(buffer_id, 2, 2, 1),
16058        ],
16059        None,
16060        &mut cx,
16061    );
16062}
16063
16064#[gpui::test]
16065async fn test_indent_guide_continuing_off_screen(cx: &mut TestAppContext) {
16066    let (buffer_id, mut cx) = setup_indent_guides_editor(
16067        &"
16068        block1
16069
16070
16071
16072            block2
16073        "
16074        .unindent(),
16075        cx,
16076    )
16077    .await;
16078
16079    assert_indent_guides(0..1, vec![indent_guide(buffer_id, 1, 1, 0)], None, &mut cx);
16080}
16081
16082#[gpui::test]
16083async fn test_indent_guide_tabs(cx: &mut TestAppContext) {
16084    let (buffer_id, mut cx) = setup_indent_guides_editor(
16085        &"
16086        def a:
16087        \tb = 3
16088        \tif True:
16089        \t\tc = 4
16090        \t\td = 5
16091        \tprint(b)
16092        "
16093        .unindent(),
16094        cx,
16095    )
16096    .await;
16097
16098    assert_indent_guides(
16099        0..6,
16100        vec![
16101            indent_guide(buffer_id, 1, 6, 0),
16102            indent_guide(buffer_id, 3, 4, 1),
16103        ],
16104        None,
16105        &mut cx,
16106    );
16107}
16108
16109#[gpui::test]
16110async fn test_active_indent_guide_single_line(cx: &mut TestAppContext) {
16111    let (buffer_id, mut cx) = setup_indent_guides_editor(
16112        &"
16113    fn main() {
16114        let a = 1;
16115    }"
16116        .unindent(),
16117        cx,
16118    )
16119    .await;
16120
16121    cx.update_editor(|editor, window, cx| {
16122        editor.change_selections(None, window, cx, |s| {
16123            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
16124        });
16125    });
16126
16127    assert_indent_guides(
16128        0..3,
16129        vec![indent_guide(buffer_id, 1, 1, 0)],
16130        Some(vec![0]),
16131        &mut cx,
16132    );
16133}
16134
16135#[gpui::test]
16136async fn test_active_indent_guide_respect_indented_range(cx: &mut TestAppContext) {
16137    let (buffer_id, mut cx) = setup_indent_guides_editor(
16138        &"
16139    fn main() {
16140        if 1 == 2 {
16141            let a = 1;
16142        }
16143    }"
16144        .unindent(),
16145        cx,
16146    )
16147    .await;
16148
16149    cx.update_editor(|editor, window, cx| {
16150        editor.change_selections(None, window, cx, |s| {
16151            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
16152        });
16153    });
16154
16155    assert_indent_guides(
16156        0..4,
16157        vec![
16158            indent_guide(buffer_id, 1, 3, 0),
16159            indent_guide(buffer_id, 2, 2, 1),
16160        ],
16161        Some(vec![1]),
16162        &mut cx,
16163    );
16164
16165    cx.update_editor(|editor, window, cx| {
16166        editor.change_selections(None, window, cx, |s| {
16167            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
16168        });
16169    });
16170
16171    assert_indent_guides(
16172        0..4,
16173        vec![
16174            indent_guide(buffer_id, 1, 3, 0),
16175            indent_guide(buffer_id, 2, 2, 1),
16176        ],
16177        Some(vec![1]),
16178        &mut cx,
16179    );
16180
16181    cx.update_editor(|editor, window, cx| {
16182        editor.change_selections(None, window, cx, |s| {
16183            s.select_ranges([Point::new(3, 0)..Point::new(3, 0)])
16184        });
16185    });
16186
16187    assert_indent_guides(
16188        0..4,
16189        vec![
16190            indent_guide(buffer_id, 1, 3, 0),
16191            indent_guide(buffer_id, 2, 2, 1),
16192        ],
16193        Some(vec![0]),
16194        &mut cx,
16195    );
16196}
16197
16198#[gpui::test]
16199async fn test_active_indent_guide_empty_line(cx: &mut TestAppContext) {
16200    let (buffer_id, mut cx) = setup_indent_guides_editor(
16201        &"
16202    fn main() {
16203        let a = 1;
16204
16205        let b = 2;
16206    }"
16207        .unindent(),
16208        cx,
16209    )
16210    .await;
16211
16212    cx.update_editor(|editor, window, cx| {
16213        editor.change_selections(None, window, cx, |s| {
16214            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
16215        });
16216    });
16217
16218    assert_indent_guides(
16219        0..5,
16220        vec![indent_guide(buffer_id, 1, 3, 0)],
16221        Some(vec![0]),
16222        &mut cx,
16223    );
16224}
16225
16226#[gpui::test]
16227async fn test_active_indent_guide_non_matching_indent(cx: &mut TestAppContext) {
16228    let (buffer_id, mut cx) = setup_indent_guides_editor(
16229        &"
16230    def m:
16231        a = 1
16232        pass"
16233            .unindent(),
16234        cx,
16235    )
16236    .await;
16237
16238    cx.update_editor(|editor, window, cx| {
16239        editor.change_selections(None, window, cx, |s| {
16240            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
16241        });
16242    });
16243
16244    assert_indent_guides(
16245        0..3,
16246        vec![indent_guide(buffer_id, 1, 2, 0)],
16247        Some(vec![0]),
16248        &mut cx,
16249    );
16250}
16251
16252#[gpui::test]
16253async fn test_indent_guide_with_expanded_diff_hunks(cx: &mut TestAppContext) {
16254    init_test(cx, |_| {});
16255    let mut cx = EditorTestContext::new(cx).await;
16256    let text = indoc! {
16257        "
16258        impl A {
16259            fn b() {
16260                0;
16261                3;
16262                5;
16263                6;
16264                7;
16265            }
16266        }
16267        "
16268    };
16269    let base_text = indoc! {
16270        "
16271        impl A {
16272            fn b() {
16273                0;
16274                1;
16275                2;
16276                3;
16277                4;
16278            }
16279            fn c() {
16280                5;
16281                6;
16282                7;
16283            }
16284        }
16285        "
16286    };
16287
16288    cx.update_editor(|editor, window, cx| {
16289        editor.set_text(text, window, cx);
16290
16291        editor.buffer().update(cx, |multibuffer, cx| {
16292            let buffer = multibuffer.as_singleton().unwrap();
16293            let diff = cx.new(|cx| BufferDiff::new_with_base_text(base_text, &buffer, cx));
16294
16295            multibuffer.set_all_diff_hunks_expanded(cx);
16296            multibuffer.add_diff(diff, cx);
16297
16298            buffer.read(cx).remote_id()
16299        })
16300    });
16301    cx.run_until_parked();
16302
16303    cx.assert_state_with_diff(
16304        indoc! { "
16305          impl A {
16306              fn b() {
16307                  0;
16308        -         1;
16309        -         2;
16310                  3;
16311        -         4;
16312        -     }
16313        -     fn c() {
16314                  5;
16315                  6;
16316                  7;
16317              }
16318          }
16319          ˇ"
16320        }
16321        .to_string(),
16322    );
16323
16324    let mut actual_guides = cx.update_editor(|editor, window, cx| {
16325        editor
16326            .snapshot(window, cx)
16327            .buffer_snapshot
16328            .indent_guides_in_range(Anchor::min()..Anchor::max(), false, cx)
16329            .map(|guide| (guide.start_row..=guide.end_row, guide.depth))
16330            .collect::<Vec<_>>()
16331    });
16332    actual_guides.sort_by_key(|item| (*item.0.start(), item.1));
16333    assert_eq!(
16334        actual_guides,
16335        vec![
16336            (MultiBufferRow(1)..=MultiBufferRow(12), 0),
16337            (MultiBufferRow(2)..=MultiBufferRow(6), 1),
16338            (MultiBufferRow(9)..=MultiBufferRow(11), 1),
16339        ]
16340    );
16341}
16342
16343#[gpui::test]
16344async fn test_adjacent_diff_hunks(executor: BackgroundExecutor, cx: &mut TestAppContext) {
16345    init_test(cx, |_| {});
16346    let mut cx = EditorTestContext::new(cx).await;
16347
16348    let diff_base = r#"
16349        a
16350        b
16351        c
16352        "#
16353    .unindent();
16354
16355    cx.set_state(
16356        &r#"
16357        ˇA
16358        b
16359        C
16360        "#
16361        .unindent(),
16362    );
16363    cx.set_head_text(&diff_base);
16364    cx.update_editor(|editor, window, cx| {
16365        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
16366    });
16367    executor.run_until_parked();
16368
16369    let both_hunks_expanded = r#"
16370        - a
16371        + ˇA
16372          b
16373        - c
16374        + C
16375        "#
16376    .unindent();
16377
16378    cx.assert_state_with_diff(both_hunks_expanded.clone());
16379
16380    let hunk_ranges = cx.update_editor(|editor, window, cx| {
16381        let snapshot = editor.snapshot(window, cx);
16382        let hunks = editor
16383            .diff_hunks_in_ranges(&[Anchor::min()..Anchor::max()], &snapshot.buffer_snapshot)
16384            .collect::<Vec<_>>();
16385        let excerpt_id = editor.buffer.read(cx).excerpt_ids()[0];
16386        let buffer_id = hunks[0].buffer_id;
16387        hunks
16388            .into_iter()
16389            .map(|hunk| Anchor::range_in_buffer(excerpt_id, buffer_id, hunk.buffer_range.clone()))
16390            .collect::<Vec<_>>()
16391    });
16392    assert_eq!(hunk_ranges.len(), 2);
16393
16394    cx.update_editor(|editor, _, cx| {
16395        editor.toggle_single_diff_hunk(hunk_ranges[0].clone(), cx);
16396    });
16397    executor.run_until_parked();
16398
16399    let second_hunk_expanded = r#"
16400          ˇA
16401          b
16402        - c
16403        + C
16404        "#
16405    .unindent();
16406
16407    cx.assert_state_with_diff(second_hunk_expanded);
16408
16409    cx.update_editor(|editor, _, cx| {
16410        editor.toggle_single_diff_hunk(hunk_ranges[0].clone(), cx);
16411    });
16412    executor.run_until_parked();
16413
16414    cx.assert_state_with_diff(both_hunks_expanded.clone());
16415
16416    cx.update_editor(|editor, _, cx| {
16417        editor.toggle_single_diff_hunk(hunk_ranges[1].clone(), cx);
16418    });
16419    executor.run_until_parked();
16420
16421    let first_hunk_expanded = r#"
16422        - a
16423        + ˇA
16424          b
16425          C
16426        "#
16427    .unindent();
16428
16429    cx.assert_state_with_diff(first_hunk_expanded);
16430
16431    cx.update_editor(|editor, _, cx| {
16432        editor.toggle_single_diff_hunk(hunk_ranges[1].clone(), cx);
16433    });
16434    executor.run_until_parked();
16435
16436    cx.assert_state_with_diff(both_hunks_expanded);
16437
16438    cx.set_state(
16439        &r#"
16440        ˇA
16441        b
16442        "#
16443        .unindent(),
16444    );
16445    cx.run_until_parked();
16446
16447    // TODO this cursor position seems bad
16448    cx.assert_state_with_diff(
16449        r#"
16450        - ˇa
16451        + A
16452          b
16453        "#
16454        .unindent(),
16455    );
16456
16457    cx.update_editor(|editor, window, cx| {
16458        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
16459    });
16460
16461    cx.assert_state_with_diff(
16462        r#"
16463            - ˇa
16464            + A
16465              b
16466            - c
16467            "#
16468        .unindent(),
16469    );
16470
16471    let hunk_ranges = cx.update_editor(|editor, window, cx| {
16472        let snapshot = editor.snapshot(window, cx);
16473        let hunks = editor
16474            .diff_hunks_in_ranges(&[Anchor::min()..Anchor::max()], &snapshot.buffer_snapshot)
16475            .collect::<Vec<_>>();
16476        let excerpt_id = editor.buffer.read(cx).excerpt_ids()[0];
16477        let buffer_id = hunks[0].buffer_id;
16478        hunks
16479            .into_iter()
16480            .map(|hunk| Anchor::range_in_buffer(excerpt_id, buffer_id, hunk.buffer_range.clone()))
16481            .collect::<Vec<_>>()
16482    });
16483    assert_eq!(hunk_ranges.len(), 2);
16484
16485    cx.update_editor(|editor, _, cx| {
16486        editor.toggle_single_diff_hunk(hunk_ranges[1].clone(), cx);
16487    });
16488    executor.run_until_parked();
16489
16490    cx.assert_state_with_diff(
16491        r#"
16492        - ˇa
16493        + A
16494          b
16495        "#
16496        .unindent(),
16497    );
16498}
16499
16500#[gpui::test]
16501async fn test_toggle_deletion_hunk_at_start_of_file(
16502    executor: BackgroundExecutor,
16503    cx: &mut TestAppContext,
16504) {
16505    init_test(cx, |_| {});
16506    let mut cx = EditorTestContext::new(cx).await;
16507
16508    let diff_base = r#"
16509        a
16510        b
16511        c
16512        "#
16513    .unindent();
16514
16515    cx.set_state(
16516        &r#"
16517        ˇb
16518        c
16519        "#
16520        .unindent(),
16521    );
16522    cx.set_head_text(&diff_base);
16523    cx.update_editor(|editor, window, cx| {
16524        editor.expand_all_diff_hunks(&ExpandAllDiffHunks, window, cx);
16525    });
16526    executor.run_until_parked();
16527
16528    let hunk_expanded = r#"
16529        - a
16530          ˇb
16531          c
16532        "#
16533    .unindent();
16534
16535    cx.assert_state_with_diff(hunk_expanded.clone());
16536
16537    let hunk_ranges = cx.update_editor(|editor, window, cx| {
16538        let snapshot = editor.snapshot(window, cx);
16539        let hunks = editor
16540            .diff_hunks_in_ranges(&[Anchor::min()..Anchor::max()], &snapshot.buffer_snapshot)
16541            .collect::<Vec<_>>();
16542        let excerpt_id = editor.buffer.read(cx).excerpt_ids()[0];
16543        let buffer_id = hunks[0].buffer_id;
16544        hunks
16545            .into_iter()
16546            .map(|hunk| Anchor::range_in_buffer(excerpt_id, buffer_id, hunk.buffer_range.clone()))
16547            .collect::<Vec<_>>()
16548    });
16549    assert_eq!(hunk_ranges.len(), 1);
16550
16551    cx.update_editor(|editor, _, cx| {
16552        editor.toggle_single_diff_hunk(hunk_ranges[0].clone(), cx);
16553    });
16554    executor.run_until_parked();
16555
16556    let hunk_collapsed = r#"
16557          ˇb
16558          c
16559        "#
16560    .unindent();
16561
16562    cx.assert_state_with_diff(hunk_collapsed);
16563
16564    cx.update_editor(|editor, _, cx| {
16565        editor.toggle_single_diff_hunk(hunk_ranges[0].clone(), cx);
16566    });
16567    executor.run_until_parked();
16568
16569    cx.assert_state_with_diff(hunk_expanded.clone());
16570}
16571
16572#[gpui::test]
16573async fn test_display_diff_hunks(cx: &mut TestAppContext) {
16574    init_test(cx, |_| {});
16575
16576    let fs = FakeFs::new(cx.executor());
16577    fs.insert_tree(
16578        path!("/test"),
16579        json!({
16580            ".git": {},
16581            "file-1": "ONE\n",
16582            "file-2": "TWO\n",
16583            "file-3": "THREE\n",
16584        }),
16585    )
16586    .await;
16587
16588    fs.set_head_for_repo(
16589        path!("/test/.git").as_ref(),
16590        &[
16591            ("file-1".into(), "one\n".into()),
16592            ("file-2".into(), "two\n".into()),
16593            ("file-3".into(), "three\n".into()),
16594        ],
16595    );
16596
16597    let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
16598    let mut buffers = vec![];
16599    for i in 1..=3 {
16600        let buffer = project
16601            .update(cx, |project, cx| {
16602                let path = format!(path!("/test/file-{}"), i);
16603                project.open_local_buffer(path, cx)
16604            })
16605            .await
16606            .unwrap();
16607        buffers.push(buffer);
16608    }
16609
16610    let multibuffer = cx.new(|cx| {
16611        let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
16612        multibuffer.set_all_diff_hunks_expanded(cx);
16613        for buffer in &buffers {
16614            let snapshot = buffer.read(cx).snapshot();
16615            multibuffer.set_excerpts_for_path(
16616                PathKey::namespaced(0, buffer.read(cx).file().unwrap().path().clone()),
16617                buffer.clone(),
16618                vec![text::Anchor::MIN.to_point(&snapshot)..text::Anchor::MAX.to_point(&snapshot)],
16619                DEFAULT_MULTIBUFFER_CONTEXT,
16620                cx,
16621            );
16622        }
16623        multibuffer
16624    });
16625
16626    let editor = cx.add_window(|window, cx| {
16627        Editor::new(EditorMode::full(), multibuffer, Some(project), window, cx)
16628    });
16629    cx.run_until_parked();
16630
16631    let snapshot = editor
16632        .update(cx, |editor, window, cx| editor.snapshot(window, cx))
16633        .unwrap();
16634    let hunks = snapshot
16635        .display_diff_hunks_for_rows(DisplayRow(0)..DisplayRow(u32::MAX), &Default::default())
16636        .map(|hunk| match hunk {
16637            DisplayDiffHunk::Unfolded {
16638                display_row_range, ..
16639            } => display_row_range,
16640            DisplayDiffHunk::Folded { .. } => unreachable!(),
16641        })
16642        .collect::<Vec<_>>();
16643    assert_eq!(
16644        hunks,
16645        [
16646            DisplayRow(2)..DisplayRow(4),
16647            DisplayRow(7)..DisplayRow(9),
16648            DisplayRow(12)..DisplayRow(14),
16649        ]
16650    );
16651}
16652
16653#[gpui::test]
16654async fn test_partially_staged_hunk(cx: &mut TestAppContext) {
16655    init_test(cx, |_| {});
16656
16657    let mut cx = EditorTestContext::new(cx).await;
16658    cx.set_head_text(indoc! { "
16659        one
16660        two
16661        three
16662        four
16663        five
16664        "
16665    });
16666    cx.set_index_text(indoc! { "
16667        one
16668        two
16669        three
16670        four
16671        five
16672        "
16673    });
16674    cx.set_state(indoc! {"
16675        one
16676        TWO
16677        ˇTHREE
16678        FOUR
16679        five
16680    "});
16681    cx.run_until_parked();
16682    cx.update_editor(|editor, window, cx| {
16683        editor.toggle_staged_selected_diff_hunks(&Default::default(), window, cx);
16684    });
16685    cx.run_until_parked();
16686    cx.assert_index_text(Some(indoc! {"
16687        one
16688        TWO
16689        THREE
16690        FOUR
16691        five
16692    "}));
16693    cx.set_state(indoc! { "
16694        one
16695        TWO
16696        ˇTHREE-HUNDRED
16697        FOUR
16698        five
16699    "});
16700    cx.run_until_parked();
16701    cx.update_editor(|editor, window, cx| {
16702        let snapshot = editor.snapshot(window, cx);
16703        let hunks = editor
16704            .diff_hunks_in_ranges(&[Anchor::min()..Anchor::max()], &snapshot.buffer_snapshot)
16705            .collect::<Vec<_>>();
16706        assert_eq!(hunks.len(), 1);
16707        assert_eq!(
16708            hunks[0].status(),
16709            DiffHunkStatus {
16710                kind: DiffHunkStatusKind::Modified,
16711                secondary: DiffHunkSecondaryStatus::OverlapsWithSecondaryHunk
16712            }
16713        );
16714
16715        editor.toggle_staged_selected_diff_hunks(&Default::default(), window, cx);
16716    });
16717    cx.run_until_parked();
16718    cx.assert_index_text(Some(indoc! {"
16719        one
16720        TWO
16721        THREE-HUNDRED
16722        FOUR
16723        five
16724    "}));
16725}
16726
16727#[gpui::test]
16728fn test_crease_insertion_and_rendering(cx: &mut TestAppContext) {
16729    init_test(cx, |_| {});
16730
16731    let editor = cx.add_window(|window, cx| {
16732        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
16733        build_editor(buffer, window, cx)
16734    });
16735
16736    let render_args = Arc::new(Mutex::new(None));
16737    let snapshot = editor
16738        .update(cx, |editor, window, cx| {
16739            let snapshot = editor.buffer().read(cx).snapshot(cx);
16740            let range =
16741                snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(2, 6));
16742
16743            struct RenderArgs {
16744                row: MultiBufferRow,
16745                folded: bool,
16746                callback: Arc<dyn Fn(bool, &mut Window, &mut App) + Send + Sync>,
16747            }
16748
16749            let crease = Crease::inline(
16750                range,
16751                FoldPlaceholder::test(),
16752                {
16753                    let toggle_callback = render_args.clone();
16754                    move |row, folded, callback, _window, _cx| {
16755                        *toggle_callback.lock() = Some(RenderArgs {
16756                            row,
16757                            folded,
16758                            callback,
16759                        });
16760                        div()
16761                    }
16762                },
16763                |_row, _folded, _window, _cx| div(),
16764            );
16765
16766            editor.insert_creases(Some(crease), cx);
16767            let snapshot = editor.snapshot(window, cx);
16768            let _div = snapshot.render_crease_toggle(
16769                MultiBufferRow(1),
16770                false,
16771                cx.entity().clone(),
16772                window,
16773                cx,
16774            );
16775            snapshot
16776        })
16777        .unwrap();
16778
16779    let render_args = render_args.lock().take().unwrap();
16780    assert_eq!(render_args.row, MultiBufferRow(1));
16781    assert!(!render_args.folded);
16782    assert!(!snapshot.is_line_folded(MultiBufferRow(1)));
16783
16784    cx.update_window(*editor, |_, window, cx| {
16785        (render_args.callback)(true, window, cx)
16786    })
16787    .unwrap();
16788    let snapshot = editor
16789        .update(cx, |editor, window, cx| editor.snapshot(window, cx))
16790        .unwrap();
16791    assert!(snapshot.is_line_folded(MultiBufferRow(1)));
16792
16793    cx.update_window(*editor, |_, window, cx| {
16794        (render_args.callback)(false, window, cx)
16795    })
16796    .unwrap();
16797    let snapshot = editor
16798        .update(cx, |editor, window, cx| editor.snapshot(window, cx))
16799        .unwrap();
16800    assert!(!snapshot.is_line_folded(MultiBufferRow(1)));
16801}
16802
16803#[gpui::test]
16804async fn test_input_text(cx: &mut TestAppContext) {
16805    init_test(cx, |_| {});
16806    let mut cx = EditorTestContext::new(cx).await;
16807
16808    cx.set_state(
16809        &r#"ˇone
16810        two
16811
16812        three
16813        fourˇ
16814        five
16815
16816        siˇx"#
16817            .unindent(),
16818    );
16819
16820    cx.dispatch_action(HandleInput(String::new()));
16821    cx.assert_editor_state(
16822        &r#"ˇone
16823        two
16824
16825        three
16826        fourˇ
16827        five
16828
16829        siˇx"#
16830            .unindent(),
16831    );
16832
16833    cx.dispatch_action(HandleInput("AAAA".to_string()));
16834    cx.assert_editor_state(
16835        &r#"AAAAˇone
16836        two
16837
16838        three
16839        fourAAAAˇ
16840        five
16841
16842        siAAAAˇx"#
16843            .unindent(),
16844    );
16845}
16846
16847#[gpui::test]
16848async fn test_scroll_cursor_center_top_bottom(cx: &mut TestAppContext) {
16849    init_test(cx, |_| {});
16850
16851    let mut cx = EditorTestContext::new(cx).await;
16852    cx.set_state(
16853        r#"let foo = 1;
16854let foo = 2;
16855let foo = 3;
16856let fooˇ = 4;
16857let foo = 5;
16858let foo = 6;
16859let foo = 7;
16860let foo = 8;
16861let foo = 9;
16862let foo = 10;
16863let foo = 11;
16864let foo = 12;
16865let foo = 13;
16866let foo = 14;
16867let foo = 15;"#,
16868    );
16869
16870    cx.update_editor(|e, window, cx| {
16871        assert_eq!(
16872            e.next_scroll_position,
16873            NextScrollCursorCenterTopBottom::Center,
16874            "Default next scroll direction is center",
16875        );
16876
16877        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, window, cx);
16878        assert_eq!(
16879            e.next_scroll_position,
16880            NextScrollCursorCenterTopBottom::Top,
16881            "After center, next scroll direction should be top",
16882        );
16883
16884        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, window, cx);
16885        assert_eq!(
16886            e.next_scroll_position,
16887            NextScrollCursorCenterTopBottom::Bottom,
16888            "After top, next scroll direction should be bottom",
16889        );
16890
16891        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, window, cx);
16892        assert_eq!(
16893            e.next_scroll_position,
16894            NextScrollCursorCenterTopBottom::Center,
16895            "After bottom, scrolling should start over",
16896        );
16897
16898        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, window, cx);
16899        assert_eq!(
16900            e.next_scroll_position,
16901            NextScrollCursorCenterTopBottom::Top,
16902            "Scrolling continues if retriggered fast enough"
16903        );
16904    });
16905
16906    cx.executor()
16907        .advance_clock(SCROLL_CENTER_TOP_BOTTOM_DEBOUNCE_TIMEOUT + Duration::from_millis(200));
16908    cx.executor().run_until_parked();
16909    cx.update_editor(|e, _, _| {
16910        assert_eq!(
16911            e.next_scroll_position,
16912            NextScrollCursorCenterTopBottom::Center,
16913            "If scrolling is not triggered fast enough, it should reset"
16914        );
16915    });
16916}
16917
16918#[gpui::test]
16919async fn test_goto_definition_with_find_all_references_fallback(cx: &mut TestAppContext) {
16920    init_test(cx, |_| {});
16921    let mut cx = EditorLspTestContext::new_rust(
16922        lsp::ServerCapabilities {
16923            definition_provider: Some(lsp::OneOf::Left(true)),
16924            references_provider: Some(lsp::OneOf::Left(true)),
16925            ..lsp::ServerCapabilities::default()
16926        },
16927        cx,
16928    )
16929    .await;
16930
16931    let set_up_lsp_handlers = |empty_go_to_definition: bool, cx: &mut EditorLspTestContext| {
16932        let go_to_definition = cx
16933            .lsp
16934            .set_request_handler::<lsp::request::GotoDefinition, _, _>(
16935                move |params, _| async move {
16936                    if empty_go_to_definition {
16937                        Ok(None)
16938                    } else {
16939                        Ok(Some(lsp::GotoDefinitionResponse::Scalar(lsp::Location {
16940                            uri: params.text_document_position_params.text_document.uri,
16941                            range: lsp::Range::new(
16942                                lsp::Position::new(4, 3),
16943                                lsp::Position::new(4, 6),
16944                            ),
16945                        })))
16946                    }
16947                },
16948            );
16949        let references = cx
16950            .lsp
16951            .set_request_handler::<lsp::request::References, _, _>(move |params, _| async move {
16952                Ok(Some(vec![lsp::Location {
16953                    uri: params.text_document_position.text_document.uri,
16954                    range: lsp::Range::new(lsp::Position::new(0, 8), lsp::Position::new(0, 11)),
16955                }]))
16956            });
16957        (go_to_definition, references)
16958    };
16959
16960    cx.set_state(
16961        &r#"fn one() {
16962            let mut a = ˇtwo();
16963        }
16964
16965        fn two() {}"#
16966            .unindent(),
16967    );
16968    set_up_lsp_handlers(false, &mut cx);
16969    let navigated = cx
16970        .update_editor(|editor, window, cx| editor.go_to_definition(&GoToDefinition, window, cx))
16971        .await
16972        .expect("Failed to navigate to definition");
16973    assert_eq!(
16974        navigated,
16975        Navigated::Yes,
16976        "Should have navigated to definition from the GetDefinition response"
16977    );
16978    cx.assert_editor_state(
16979        &r#"fn one() {
16980            let mut a = two();
16981        }
16982
16983        fn «twoˇ»() {}"#
16984            .unindent(),
16985    );
16986
16987    let editors = cx.update_workspace(|workspace, _, cx| {
16988        workspace.items_of_type::<Editor>(cx).collect::<Vec<_>>()
16989    });
16990    cx.update_editor(|_, _, test_editor_cx| {
16991        assert_eq!(
16992            editors.len(),
16993            1,
16994            "Initially, only one, test, editor should be open in the workspace"
16995        );
16996        assert_eq!(
16997            test_editor_cx.entity(),
16998            editors.last().expect("Asserted len is 1").clone()
16999        );
17000    });
17001
17002    set_up_lsp_handlers(true, &mut cx);
17003    let navigated = cx
17004        .update_editor(|editor, window, cx| editor.go_to_definition(&GoToDefinition, window, cx))
17005        .await
17006        .expect("Failed to navigate to lookup references");
17007    assert_eq!(
17008        navigated,
17009        Navigated::Yes,
17010        "Should have navigated to references as a fallback after empty GoToDefinition response"
17011    );
17012    // We should not change the selections in the existing file,
17013    // if opening another milti buffer with the references
17014    cx.assert_editor_state(
17015        &r#"fn one() {
17016            let mut a = two();
17017        }
17018
17019        fn «twoˇ»() {}"#
17020            .unindent(),
17021    );
17022    let editors = cx.update_workspace(|workspace, _, cx| {
17023        workspace.items_of_type::<Editor>(cx).collect::<Vec<_>>()
17024    });
17025    cx.update_editor(|_, _, test_editor_cx| {
17026        assert_eq!(
17027            editors.len(),
17028            2,
17029            "After falling back to references search, we open a new editor with the results"
17030        );
17031        let references_fallback_text = editors
17032            .into_iter()
17033            .find(|new_editor| *new_editor != test_editor_cx.entity())
17034            .expect("Should have one non-test editor now")
17035            .read(test_editor_cx)
17036            .text(test_editor_cx);
17037        assert_eq!(
17038            references_fallback_text, "fn one() {\n    let mut a = two();\n}",
17039            "Should use the range from the references response and not the GoToDefinition one"
17040        );
17041    });
17042}
17043
17044#[gpui::test]
17045async fn test_goto_definition_no_fallback(cx: &mut TestAppContext) {
17046    init_test(cx, |_| {});
17047    cx.update(|cx| {
17048        let mut editor_settings = EditorSettings::get_global(cx).clone();
17049        editor_settings.go_to_definition_fallback = GoToDefinitionFallback::None;
17050        EditorSettings::override_global(editor_settings, cx);
17051    });
17052    let mut cx = EditorLspTestContext::new_rust(
17053        lsp::ServerCapabilities {
17054            definition_provider: Some(lsp::OneOf::Left(true)),
17055            references_provider: Some(lsp::OneOf::Left(true)),
17056            ..lsp::ServerCapabilities::default()
17057        },
17058        cx,
17059    )
17060    .await;
17061    let original_state = r#"fn one() {
17062        let mut a = ˇtwo();
17063    }
17064
17065    fn two() {}"#
17066        .unindent();
17067    cx.set_state(&original_state);
17068
17069    let mut go_to_definition = cx
17070        .lsp
17071        .set_request_handler::<lsp::request::GotoDefinition, _, _>(
17072            move |_, _| async move { Ok(None) },
17073        );
17074    let _references = cx
17075        .lsp
17076        .set_request_handler::<lsp::request::References, _, _>(move |_, _| async move {
17077            panic!("Should not call for references with no go to definition fallback")
17078        });
17079
17080    let navigated = cx
17081        .update_editor(|editor, window, cx| editor.go_to_definition(&GoToDefinition, window, cx))
17082        .await
17083        .expect("Failed to navigate to lookup references");
17084    go_to_definition
17085        .next()
17086        .await
17087        .expect("Should have called the go_to_definition handler");
17088
17089    assert_eq!(
17090        navigated,
17091        Navigated::No,
17092        "Should have navigated to references as a fallback after empty GoToDefinition response"
17093    );
17094    cx.assert_editor_state(&original_state);
17095    let editors = cx.update_workspace(|workspace, _, cx| {
17096        workspace.items_of_type::<Editor>(cx).collect::<Vec<_>>()
17097    });
17098    cx.update_editor(|_, _, _| {
17099        assert_eq!(
17100            editors.len(),
17101            1,
17102            "After unsuccessful fallback, no other editor should have been opened"
17103        );
17104    });
17105}
17106
17107#[gpui::test]
17108async fn test_find_enclosing_node_with_task(cx: &mut TestAppContext) {
17109    init_test(cx, |_| {});
17110
17111    let language = Arc::new(Language::new(
17112        LanguageConfig::default(),
17113        Some(tree_sitter_rust::LANGUAGE.into()),
17114    ));
17115
17116    let text = r#"
17117        #[cfg(test)]
17118        mod tests() {
17119            #[test]
17120            fn runnable_1() {
17121                let a = 1;
17122            }
17123
17124            #[test]
17125            fn runnable_2() {
17126                let a = 1;
17127                let b = 2;
17128            }
17129        }
17130    "#
17131    .unindent();
17132
17133    let fs = FakeFs::new(cx.executor());
17134    fs.insert_file("/file.rs", Default::default()).await;
17135
17136    let project = Project::test(fs, ["/a".as_ref()], cx).await;
17137    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
17138    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
17139    let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(language, cx));
17140    let multi_buffer = cx.new(|cx| MultiBuffer::singleton(buffer.clone(), cx));
17141
17142    let editor = cx.new_window_entity(|window, cx| {
17143        Editor::new(
17144            EditorMode::full(),
17145            multi_buffer,
17146            Some(project.clone()),
17147            window,
17148            cx,
17149        )
17150    });
17151
17152    editor.update_in(cx, |editor, window, cx| {
17153        let snapshot = editor.buffer().read(cx).snapshot(cx);
17154        editor.tasks.insert(
17155            (buffer.read(cx).remote_id(), 3),
17156            RunnableTasks {
17157                templates: vec![],
17158                offset: snapshot.anchor_before(43),
17159                column: 0,
17160                extra_variables: HashMap::default(),
17161                context_range: BufferOffset(43)..BufferOffset(85),
17162            },
17163        );
17164        editor.tasks.insert(
17165            (buffer.read(cx).remote_id(), 8),
17166            RunnableTasks {
17167                templates: vec![],
17168                offset: snapshot.anchor_before(86),
17169                column: 0,
17170                extra_variables: HashMap::default(),
17171                context_range: BufferOffset(86)..BufferOffset(191),
17172            },
17173        );
17174
17175        // Test finding task when cursor is inside function body
17176        editor.change_selections(None, window, cx, |s| {
17177            s.select_ranges([Point::new(4, 5)..Point::new(4, 5)])
17178        });
17179        let (_, row, _) = editor.find_enclosing_node_task(cx).unwrap();
17180        assert_eq!(row, 3, "Should find task for cursor inside runnable_1");
17181
17182        // Test finding task when cursor is on function name
17183        editor.change_selections(None, window, cx, |s| {
17184            s.select_ranges([Point::new(8, 4)..Point::new(8, 4)])
17185        });
17186        let (_, row, _) = editor.find_enclosing_node_task(cx).unwrap();
17187        assert_eq!(row, 8, "Should find task when cursor is on function name");
17188    });
17189}
17190
17191#[gpui::test]
17192async fn test_folding_buffers(cx: &mut TestAppContext) {
17193    init_test(cx, |_| {});
17194
17195    let sample_text_1 = "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj".to_string();
17196    let sample_text_2 = "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu".to_string();
17197    let sample_text_3 = "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n1111\n2222\n3333\n4444\n5555".to_string();
17198
17199    let fs = FakeFs::new(cx.executor());
17200    fs.insert_tree(
17201        path!("/a"),
17202        json!({
17203            "first.rs": sample_text_1,
17204            "second.rs": sample_text_2,
17205            "third.rs": sample_text_3,
17206        }),
17207    )
17208    .await;
17209    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
17210    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
17211    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
17212    let worktree = project.update(cx, |project, cx| {
17213        let mut worktrees = project.worktrees(cx).collect::<Vec<_>>();
17214        assert_eq!(worktrees.len(), 1);
17215        worktrees.pop().unwrap()
17216    });
17217    let worktree_id = worktree.update(cx, |worktree, _| worktree.id());
17218
17219    let buffer_1 = project
17220        .update(cx, |project, cx| {
17221            project.open_buffer((worktree_id, "first.rs"), cx)
17222        })
17223        .await
17224        .unwrap();
17225    let buffer_2 = project
17226        .update(cx, |project, cx| {
17227            project.open_buffer((worktree_id, "second.rs"), cx)
17228        })
17229        .await
17230        .unwrap();
17231    let buffer_3 = project
17232        .update(cx, |project, cx| {
17233            project.open_buffer((worktree_id, "third.rs"), cx)
17234        })
17235        .await
17236        .unwrap();
17237
17238    let multi_buffer = cx.new(|cx| {
17239        let mut multi_buffer = MultiBuffer::new(ReadWrite);
17240        multi_buffer.push_excerpts(
17241            buffer_1.clone(),
17242            [
17243                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
17244                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
17245                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
17246            ],
17247            cx,
17248        );
17249        multi_buffer.push_excerpts(
17250            buffer_2.clone(),
17251            [
17252                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
17253                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
17254                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
17255            ],
17256            cx,
17257        );
17258        multi_buffer.push_excerpts(
17259            buffer_3.clone(),
17260            [
17261                ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0)),
17262                ExcerptRange::new(Point::new(5, 0)..Point::new(7, 0)),
17263                ExcerptRange::new(Point::new(9, 0)..Point::new(10, 4)),
17264            ],
17265            cx,
17266        );
17267        multi_buffer
17268    });
17269    let multi_buffer_editor = cx.new_window_entity(|window, cx| {
17270        Editor::new(
17271            EditorMode::full(),
17272            multi_buffer.clone(),
17273            Some(project.clone()),
17274            window,
17275            cx,
17276        )
17277    });
17278
17279    assert_eq!(
17280        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17281        "\n\naaaa\nbbbb\ncccc\n\n\nffff\ngggg\n\n\njjjj\n\n\nllll\nmmmm\nnnnn\n\n\nqqqq\nrrrr\n\n\nuuuu\n\n\nvvvv\nwwww\nxxxx\n\n\n1111\n2222\n\n\n5555",
17282    );
17283
17284    multi_buffer_editor.update(cx, |editor, cx| {
17285        editor.fold_buffer(buffer_1.read(cx).remote_id(), cx)
17286    });
17287    assert_eq!(
17288        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17289        "\n\n\n\nllll\nmmmm\nnnnn\n\n\nqqqq\nrrrr\n\n\nuuuu\n\n\nvvvv\nwwww\nxxxx\n\n\n1111\n2222\n\n\n5555",
17290        "After folding the first buffer, its text should not be displayed"
17291    );
17292
17293    multi_buffer_editor.update(cx, |editor, cx| {
17294        editor.fold_buffer(buffer_2.read(cx).remote_id(), cx)
17295    });
17296    assert_eq!(
17297        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17298        "\n\n\n\n\n\nvvvv\nwwww\nxxxx\n\n\n1111\n2222\n\n\n5555",
17299        "After folding the second buffer, its text should not be displayed"
17300    );
17301
17302    multi_buffer_editor.update(cx, |editor, cx| {
17303        editor.fold_buffer(buffer_3.read(cx).remote_id(), cx)
17304    });
17305    assert_eq!(
17306        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17307        "\n\n\n\n\n",
17308        "After folding the third buffer, its text should not be displayed"
17309    );
17310
17311    // Emulate selection inside the fold logic, that should work
17312    multi_buffer_editor.update_in(cx, |editor, window, cx| {
17313        editor
17314            .snapshot(window, cx)
17315            .next_line_boundary(Point::new(0, 4));
17316    });
17317
17318    multi_buffer_editor.update(cx, |editor, cx| {
17319        editor.unfold_buffer(buffer_2.read(cx).remote_id(), cx)
17320    });
17321    assert_eq!(
17322        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17323        "\n\n\n\nllll\nmmmm\nnnnn\n\n\nqqqq\nrrrr\n\n\nuuuu\n\n",
17324        "After unfolding the second buffer, its text should be displayed"
17325    );
17326
17327    // Typing inside of buffer 1 causes that buffer to be unfolded.
17328    multi_buffer_editor.update_in(cx, |editor, window, cx| {
17329        assert_eq!(
17330            multi_buffer
17331                .read(cx)
17332                .snapshot(cx)
17333                .text_for_range(Point::new(1, 0)..Point::new(1, 4))
17334                .collect::<String>(),
17335            "bbbb"
17336        );
17337        editor.change_selections(None, window, cx, |selections| {
17338            selections.select_ranges(vec![Point::new(1, 0)..Point::new(1, 0)]);
17339        });
17340        editor.handle_input("B", window, cx);
17341    });
17342
17343    assert_eq!(
17344        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17345        "\n\nB\n\n\n\n\n\n\nllll\nmmmm\nnnnn\n\n\nqqqq\nrrrr\n\n\nuuuu\n\n",
17346        "After unfolding the first buffer, its and 2nd buffer's text should be displayed"
17347    );
17348
17349    multi_buffer_editor.update(cx, |editor, cx| {
17350        editor.unfold_buffer(buffer_3.read(cx).remote_id(), cx)
17351    });
17352    assert_eq!(
17353        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17354        "\n\nB\n\n\n\n\n\n\nllll\nmmmm\nnnnn\n\n\nqqqq\nrrrr\n\n\nuuuu\n\n\nvvvv\nwwww\nxxxx\n\n\n1111\n2222\n\n\n5555",
17355        "After unfolding the all buffers, all original text should be displayed"
17356    );
17357}
17358
17359#[gpui::test]
17360async fn test_folding_buffers_with_one_excerpt(cx: &mut TestAppContext) {
17361    init_test(cx, |_| {});
17362
17363    let sample_text_1 = "1111\n2222\n3333".to_string();
17364    let sample_text_2 = "4444\n5555\n6666".to_string();
17365    let sample_text_3 = "7777\n8888\n9999".to_string();
17366
17367    let fs = FakeFs::new(cx.executor());
17368    fs.insert_tree(
17369        path!("/a"),
17370        json!({
17371            "first.rs": sample_text_1,
17372            "second.rs": sample_text_2,
17373            "third.rs": sample_text_3,
17374        }),
17375    )
17376    .await;
17377    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
17378    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
17379    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
17380    let worktree = project.update(cx, |project, cx| {
17381        let mut worktrees = project.worktrees(cx).collect::<Vec<_>>();
17382        assert_eq!(worktrees.len(), 1);
17383        worktrees.pop().unwrap()
17384    });
17385    let worktree_id = worktree.update(cx, |worktree, _| worktree.id());
17386
17387    let buffer_1 = project
17388        .update(cx, |project, cx| {
17389            project.open_buffer((worktree_id, "first.rs"), cx)
17390        })
17391        .await
17392        .unwrap();
17393    let buffer_2 = project
17394        .update(cx, |project, cx| {
17395            project.open_buffer((worktree_id, "second.rs"), cx)
17396        })
17397        .await
17398        .unwrap();
17399    let buffer_3 = project
17400        .update(cx, |project, cx| {
17401            project.open_buffer((worktree_id, "third.rs"), cx)
17402        })
17403        .await
17404        .unwrap();
17405
17406    let multi_buffer = cx.new(|cx| {
17407        let mut multi_buffer = MultiBuffer::new(ReadWrite);
17408        multi_buffer.push_excerpts(
17409            buffer_1.clone(),
17410            [ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0))],
17411            cx,
17412        );
17413        multi_buffer.push_excerpts(
17414            buffer_2.clone(),
17415            [ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0))],
17416            cx,
17417        );
17418        multi_buffer.push_excerpts(
17419            buffer_3.clone(),
17420            [ExcerptRange::new(Point::new(0, 0)..Point::new(3, 0))],
17421            cx,
17422        );
17423        multi_buffer
17424    });
17425
17426    let multi_buffer_editor = cx.new_window_entity(|window, cx| {
17427        Editor::new(
17428            EditorMode::full(),
17429            multi_buffer,
17430            Some(project.clone()),
17431            window,
17432            cx,
17433        )
17434    });
17435
17436    let full_text = "\n\n1111\n2222\n3333\n\n\n4444\n5555\n6666\n\n\n7777\n8888\n9999";
17437    assert_eq!(
17438        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17439        full_text,
17440    );
17441
17442    multi_buffer_editor.update(cx, |editor, cx| {
17443        editor.fold_buffer(buffer_1.read(cx).remote_id(), cx)
17444    });
17445    assert_eq!(
17446        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17447        "\n\n\n\n4444\n5555\n6666\n\n\n7777\n8888\n9999",
17448        "After folding the first buffer, its text should not be displayed"
17449    );
17450
17451    multi_buffer_editor.update(cx, |editor, cx| {
17452        editor.fold_buffer(buffer_2.read(cx).remote_id(), cx)
17453    });
17454
17455    assert_eq!(
17456        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17457        "\n\n\n\n\n\n7777\n8888\n9999",
17458        "After folding the second buffer, its text should not be displayed"
17459    );
17460
17461    multi_buffer_editor.update(cx, |editor, cx| {
17462        editor.fold_buffer(buffer_3.read(cx).remote_id(), cx)
17463    });
17464    assert_eq!(
17465        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17466        "\n\n\n\n\n",
17467        "After folding the third buffer, its text should not be displayed"
17468    );
17469
17470    multi_buffer_editor.update(cx, |editor, cx| {
17471        editor.unfold_buffer(buffer_2.read(cx).remote_id(), cx)
17472    });
17473    assert_eq!(
17474        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17475        "\n\n\n\n4444\n5555\n6666\n\n",
17476        "After unfolding the second buffer, its text should be displayed"
17477    );
17478
17479    multi_buffer_editor.update(cx, |editor, cx| {
17480        editor.unfold_buffer(buffer_1.read(cx).remote_id(), cx)
17481    });
17482    assert_eq!(
17483        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17484        "\n\n1111\n2222\n3333\n\n\n4444\n5555\n6666\n\n",
17485        "After unfolding the first buffer, its text should be displayed"
17486    );
17487
17488    multi_buffer_editor.update(cx, |editor, cx| {
17489        editor.unfold_buffer(buffer_3.read(cx).remote_id(), cx)
17490    });
17491    assert_eq!(
17492        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17493        full_text,
17494        "After unfolding all buffers, all original text should be displayed"
17495    );
17496}
17497
17498#[gpui::test]
17499async fn test_folding_buffer_when_multibuffer_has_only_one_excerpt(cx: &mut TestAppContext) {
17500    init_test(cx, |_| {});
17501
17502    let sample_text = "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj".to_string();
17503
17504    let fs = FakeFs::new(cx.executor());
17505    fs.insert_tree(
17506        path!("/a"),
17507        json!({
17508            "main.rs": sample_text,
17509        }),
17510    )
17511    .await;
17512    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
17513    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
17514    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
17515    let worktree = project.update(cx, |project, cx| {
17516        let mut worktrees = project.worktrees(cx).collect::<Vec<_>>();
17517        assert_eq!(worktrees.len(), 1);
17518        worktrees.pop().unwrap()
17519    });
17520    let worktree_id = worktree.update(cx, |worktree, _| worktree.id());
17521
17522    let buffer_1 = project
17523        .update(cx, |project, cx| {
17524            project.open_buffer((worktree_id, "main.rs"), cx)
17525        })
17526        .await
17527        .unwrap();
17528
17529    let multi_buffer = cx.new(|cx| {
17530        let mut multi_buffer = MultiBuffer::new(ReadWrite);
17531        multi_buffer.push_excerpts(
17532            buffer_1.clone(),
17533            [ExcerptRange::new(
17534                Point::new(0, 0)
17535                    ..Point::new(
17536                        sample_text.chars().filter(|&c| c == '\n').count() as u32 + 1,
17537                        0,
17538                    ),
17539            )],
17540            cx,
17541        );
17542        multi_buffer
17543    });
17544    let multi_buffer_editor = cx.new_window_entity(|window, cx| {
17545        Editor::new(
17546            EditorMode::full(),
17547            multi_buffer,
17548            Some(project.clone()),
17549            window,
17550            cx,
17551        )
17552    });
17553
17554    let selection_range = Point::new(1, 0)..Point::new(2, 0);
17555    multi_buffer_editor.update_in(cx, |editor, window, cx| {
17556        enum TestHighlight {}
17557        let multi_buffer_snapshot = editor.buffer().read(cx).snapshot(cx);
17558        let highlight_range = selection_range.clone().to_anchors(&multi_buffer_snapshot);
17559        editor.highlight_text::<TestHighlight>(
17560            vec![highlight_range.clone()],
17561            HighlightStyle::color(Hsla::green()),
17562            cx,
17563        );
17564        editor.change_selections(None, window, cx, |s| s.select_ranges(Some(highlight_range)));
17565    });
17566
17567    let full_text = format!("\n\n{sample_text}");
17568    assert_eq!(
17569        multi_buffer_editor.update(cx, |editor, cx| editor.display_text(cx)),
17570        full_text,
17571    );
17572}
17573
17574#[gpui::test]
17575async fn test_multi_buffer_navigation_with_folded_buffers(cx: &mut TestAppContext) {
17576    init_test(cx, |_| {});
17577    cx.update(|cx| {
17578        let default_key_bindings = settings::KeymapFile::load_asset_allow_partial_failure(
17579            "keymaps/default-linux.json",
17580            cx,
17581        )
17582        .unwrap();
17583        cx.bind_keys(default_key_bindings);
17584    });
17585
17586    let (editor, cx) = cx.add_window_view(|window, cx| {
17587        let multi_buffer = MultiBuffer::build_multi(
17588            [
17589                ("a0\nb0\nc0\nd0\ne0\n", vec![Point::row_range(0..2)]),
17590                ("a1\nb1\nc1\nd1\ne1\n", vec![Point::row_range(0..2)]),
17591                ("a2\nb2\nc2\nd2\ne2\n", vec![Point::row_range(0..2)]),
17592                ("a3\nb3\nc3\nd3\ne3\n", vec![Point::row_range(0..2)]),
17593            ],
17594            cx,
17595        );
17596        let mut editor = Editor::new(EditorMode::full(), multi_buffer.clone(), None, window, cx);
17597
17598        let buffer_ids = multi_buffer.read(cx).excerpt_buffer_ids();
17599        // fold all but the second buffer, so that we test navigating between two
17600        // adjacent folded buffers, as well as folded buffers at the start and
17601        // end the multibuffer
17602        editor.fold_buffer(buffer_ids[0], cx);
17603        editor.fold_buffer(buffer_ids[2], cx);
17604        editor.fold_buffer(buffer_ids[3], cx);
17605
17606        editor
17607    });
17608    cx.simulate_resize(size(px(1000.), px(1000.)));
17609
17610    let mut cx = EditorTestContext::for_editor_in(editor.clone(), cx).await;
17611    cx.assert_excerpts_with_selections(indoc! {"
17612        [EXCERPT]
17613        ˇ[FOLDED]
17614        [EXCERPT]
17615        a1
17616        b1
17617        [EXCERPT]
17618        [FOLDED]
17619        [EXCERPT]
17620        [FOLDED]
17621        "
17622    });
17623    cx.simulate_keystroke("down");
17624    cx.assert_excerpts_with_selections(indoc! {"
17625        [EXCERPT]
17626        [FOLDED]
17627        [EXCERPT]
17628        ˇa1
17629        b1
17630        [EXCERPT]
17631        [FOLDED]
17632        [EXCERPT]
17633        [FOLDED]
17634        "
17635    });
17636    cx.simulate_keystroke("down");
17637    cx.assert_excerpts_with_selections(indoc! {"
17638        [EXCERPT]
17639        [FOLDED]
17640        [EXCERPT]
17641        a1
17642        ˇb1
17643        [EXCERPT]
17644        [FOLDED]
17645        [EXCERPT]
17646        [FOLDED]
17647        "
17648    });
17649    cx.simulate_keystroke("down");
17650    cx.assert_excerpts_with_selections(indoc! {"
17651        [EXCERPT]
17652        [FOLDED]
17653        [EXCERPT]
17654        a1
17655        b1
17656        ˇ[EXCERPT]
17657        [FOLDED]
17658        [EXCERPT]
17659        [FOLDED]
17660        "
17661    });
17662    cx.simulate_keystroke("down");
17663    cx.assert_excerpts_with_selections(indoc! {"
17664        [EXCERPT]
17665        [FOLDED]
17666        [EXCERPT]
17667        a1
17668        b1
17669        [EXCERPT]
17670        ˇ[FOLDED]
17671        [EXCERPT]
17672        [FOLDED]
17673        "
17674    });
17675    for _ in 0..5 {
17676        cx.simulate_keystroke("down");
17677        cx.assert_excerpts_with_selections(indoc! {"
17678            [EXCERPT]
17679            [FOLDED]
17680            [EXCERPT]
17681            a1
17682            b1
17683            [EXCERPT]
17684            [FOLDED]
17685            [EXCERPT]
17686            ˇ[FOLDED]
17687            "
17688        });
17689    }
17690
17691    cx.simulate_keystroke("up");
17692    cx.assert_excerpts_with_selections(indoc! {"
17693        [EXCERPT]
17694        [FOLDED]
17695        [EXCERPT]
17696        a1
17697        b1
17698        [EXCERPT]
17699        ˇ[FOLDED]
17700        [EXCERPT]
17701        [FOLDED]
17702        "
17703    });
17704    cx.simulate_keystroke("up");
17705    cx.assert_excerpts_with_selections(indoc! {"
17706        [EXCERPT]
17707        [FOLDED]
17708        [EXCERPT]
17709        a1
17710        b1
17711        ˇ[EXCERPT]
17712        [FOLDED]
17713        [EXCERPT]
17714        [FOLDED]
17715        "
17716    });
17717    cx.simulate_keystroke("up");
17718    cx.assert_excerpts_with_selections(indoc! {"
17719        [EXCERPT]
17720        [FOLDED]
17721        [EXCERPT]
17722        a1
17723        ˇb1
17724        [EXCERPT]
17725        [FOLDED]
17726        [EXCERPT]
17727        [FOLDED]
17728        "
17729    });
17730    cx.simulate_keystroke("up");
17731    cx.assert_excerpts_with_selections(indoc! {"
17732        [EXCERPT]
17733        [FOLDED]
17734        [EXCERPT]
17735        ˇa1
17736        b1
17737        [EXCERPT]
17738        [FOLDED]
17739        [EXCERPT]
17740        [FOLDED]
17741        "
17742    });
17743    for _ in 0..5 {
17744        cx.simulate_keystroke("up");
17745        cx.assert_excerpts_with_selections(indoc! {"
17746            [EXCERPT]
17747            ˇ[FOLDED]
17748            [EXCERPT]
17749            a1
17750            b1
17751            [EXCERPT]
17752            [FOLDED]
17753            [EXCERPT]
17754            [FOLDED]
17755            "
17756        });
17757    }
17758}
17759
17760#[gpui::test]
17761async fn test_inline_completion_text(cx: &mut TestAppContext) {
17762    init_test(cx, |_| {});
17763
17764    // Simple insertion
17765    assert_highlighted_edits(
17766        "Hello, world!",
17767        vec![(Point::new(0, 6)..Point::new(0, 6), " beautiful".into())],
17768        true,
17769        cx,
17770        |highlighted_edits, cx| {
17771            assert_eq!(highlighted_edits.text, "Hello, beautiful world!");
17772            assert_eq!(highlighted_edits.highlights.len(), 1);
17773            assert_eq!(highlighted_edits.highlights[0].0, 6..16);
17774            assert_eq!(
17775                highlighted_edits.highlights[0].1.background_color,
17776                Some(cx.theme().status().created_background)
17777            );
17778        },
17779    )
17780    .await;
17781
17782    // Replacement
17783    assert_highlighted_edits(
17784        "This is a test.",
17785        vec![(Point::new(0, 0)..Point::new(0, 4), "That".into())],
17786        false,
17787        cx,
17788        |highlighted_edits, cx| {
17789            assert_eq!(highlighted_edits.text, "That is a test.");
17790            assert_eq!(highlighted_edits.highlights.len(), 1);
17791            assert_eq!(highlighted_edits.highlights[0].0, 0..4);
17792            assert_eq!(
17793                highlighted_edits.highlights[0].1.background_color,
17794                Some(cx.theme().status().created_background)
17795            );
17796        },
17797    )
17798    .await;
17799
17800    // Multiple edits
17801    assert_highlighted_edits(
17802        "Hello, world!",
17803        vec![
17804            (Point::new(0, 0)..Point::new(0, 5), "Greetings".into()),
17805            (Point::new(0, 12)..Point::new(0, 12), " and universe".into()),
17806        ],
17807        false,
17808        cx,
17809        |highlighted_edits, cx| {
17810            assert_eq!(highlighted_edits.text, "Greetings, world and universe!");
17811            assert_eq!(highlighted_edits.highlights.len(), 2);
17812            assert_eq!(highlighted_edits.highlights[0].0, 0..9);
17813            assert_eq!(highlighted_edits.highlights[1].0, 16..29);
17814            assert_eq!(
17815                highlighted_edits.highlights[0].1.background_color,
17816                Some(cx.theme().status().created_background)
17817            );
17818            assert_eq!(
17819                highlighted_edits.highlights[1].1.background_color,
17820                Some(cx.theme().status().created_background)
17821            );
17822        },
17823    )
17824    .await;
17825
17826    // Multiple lines with edits
17827    assert_highlighted_edits(
17828        "First line\nSecond line\nThird line\nFourth line",
17829        vec![
17830            (Point::new(1, 7)..Point::new(1, 11), "modified".to_string()),
17831            (
17832                Point::new(2, 0)..Point::new(2, 10),
17833                "New third line".to_string(),
17834            ),
17835            (Point::new(3, 6)..Point::new(3, 6), " updated".to_string()),
17836        ],
17837        false,
17838        cx,
17839        |highlighted_edits, cx| {
17840            assert_eq!(
17841                highlighted_edits.text,
17842                "Second modified\nNew third line\nFourth updated line"
17843            );
17844            assert_eq!(highlighted_edits.highlights.len(), 3);
17845            assert_eq!(highlighted_edits.highlights[0].0, 7..15); // "modified"
17846            assert_eq!(highlighted_edits.highlights[1].0, 16..30); // "New third line"
17847            assert_eq!(highlighted_edits.highlights[2].0, 37..45); // " updated"
17848            for highlight in &highlighted_edits.highlights {
17849                assert_eq!(
17850                    highlight.1.background_color,
17851                    Some(cx.theme().status().created_background)
17852                );
17853            }
17854        },
17855    )
17856    .await;
17857}
17858
17859#[gpui::test]
17860async fn test_inline_completion_text_with_deletions(cx: &mut TestAppContext) {
17861    init_test(cx, |_| {});
17862
17863    // Deletion
17864    assert_highlighted_edits(
17865        "Hello, world!",
17866        vec![(Point::new(0, 5)..Point::new(0, 11), "".to_string())],
17867        true,
17868        cx,
17869        |highlighted_edits, cx| {
17870            assert_eq!(highlighted_edits.text, "Hello, world!");
17871            assert_eq!(highlighted_edits.highlights.len(), 1);
17872            assert_eq!(highlighted_edits.highlights[0].0, 5..11);
17873            assert_eq!(
17874                highlighted_edits.highlights[0].1.background_color,
17875                Some(cx.theme().status().deleted_background)
17876            );
17877        },
17878    )
17879    .await;
17880
17881    // Insertion
17882    assert_highlighted_edits(
17883        "Hello, world!",
17884        vec![(Point::new(0, 6)..Point::new(0, 6), " digital".to_string())],
17885        true,
17886        cx,
17887        |highlighted_edits, cx| {
17888            assert_eq!(highlighted_edits.highlights.len(), 1);
17889            assert_eq!(highlighted_edits.highlights[0].0, 6..14);
17890            assert_eq!(
17891                highlighted_edits.highlights[0].1.background_color,
17892                Some(cx.theme().status().created_background)
17893            );
17894        },
17895    )
17896    .await;
17897}
17898
17899async fn assert_highlighted_edits(
17900    text: &str,
17901    edits: Vec<(Range<Point>, String)>,
17902    include_deletions: bool,
17903    cx: &mut TestAppContext,
17904    assertion_fn: impl Fn(HighlightedText, &App),
17905) {
17906    let window = cx.add_window(|window, cx| {
17907        let buffer = MultiBuffer::build_simple(text, cx);
17908        Editor::new(EditorMode::full(), buffer, None, window, cx)
17909    });
17910    let cx = &mut VisualTestContext::from_window(*window, cx);
17911
17912    let (buffer, snapshot) = window
17913        .update(cx, |editor, _window, cx| {
17914            (
17915                editor.buffer().clone(),
17916                editor.buffer().read(cx).snapshot(cx),
17917            )
17918        })
17919        .unwrap();
17920
17921    let edits = edits
17922        .into_iter()
17923        .map(|(range, edit)| {
17924            (
17925                snapshot.anchor_after(range.start)..snapshot.anchor_before(range.end),
17926                edit,
17927            )
17928        })
17929        .collect::<Vec<_>>();
17930
17931    let text_anchor_edits = edits
17932        .clone()
17933        .into_iter()
17934        .map(|(range, edit)| (range.start.text_anchor..range.end.text_anchor, edit))
17935        .collect::<Vec<_>>();
17936
17937    let edit_preview = window
17938        .update(cx, |_, _window, cx| {
17939            buffer
17940                .read(cx)
17941                .as_singleton()
17942                .unwrap()
17943                .read(cx)
17944                .preview_edits(text_anchor_edits.into(), cx)
17945        })
17946        .unwrap()
17947        .await;
17948
17949    cx.update(|_window, cx| {
17950        let highlighted_edits = inline_completion_edit_text(
17951            &snapshot.as_singleton().unwrap().2,
17952            &edits,
17953            &edit_preview,
17954            include_deletions,
17955            cx,
17956        );
17957        assertion_fn(highlighted_edits, cx)
17958    });
17959}
17960
17961#[track_caller]
17962fn assert_breakpoint(
17963    breakpoints: &BTreeMap<Arc<Path>, Vec<SourceBreakpoint>>,
17964    path: &Arc<Path>,
17965    expected: Vec<(u32, Breakpoint)>,
17966) {
17967    if expected.len() == 0usize {
17968        assert!(!breakpoints.contains_key(path), "{}", path.display());
17969    } else {
17970        let mut breakpoint = breakpoints
17971            .get(path)
17972            .unwrap()
17973            .into_iter()
17974            .map(|breakpoint| {
17975                (
17976                    breakpoint.row,
17977                    Breakpoint {
17978                        message: breakpoint.message.clone(),
17979                        state: breakpoint.state,
17980                        condition: breakpoint.condition.clone(),
17981                        hit_condition: breakpoint.hit_condition.clone(),
17982                    },
17983                )
17984            })
17985            .collect::<Vec<_>>();
17986
17987        breakpoint.sort_by_key(|(cached_position, _)| *cached_position);
17988
17989        assert_eq!(expected, breakpoint);
17990    }
17991}
17992
17993fn add_log_breakpoint_at_cursor(
17994    editor: &mut Editor,
17995    log_message: &str,
17996    window: &mut Window,
17997    cx: &mut Context<Editor>,
17998) {
17999    let (anchor, bp) = editor
18000        .breakpoints_at_cursors(window, cx)
18001        .first()
18002        .and_then(|(anchor, bp)| {
18003            if let Some(bp) = bp {
18004                Some((*anchor, bp.clone()))
18005            } else {
18006                None
18007            }
18008        })
18009        .unwrap_or_else(|| {
18010            let cursor_position: Point = editor.selections.newest(cx).head();
18011
18012            let breakpoint_position = editor
18013                .snapshot(window, cx)
18014                .display_snapshot
18015                .buffer_snapshot
18016                .anchor_before(Point::new(cursor_position.row, 0));
18017
18018            (breakpoint_position, Breakpoint::new_log(&log_message))
18019        });
18020
18021    editor.edit_breakpoint_at_anchor(
18022        anchor,
18023        bp,
18024        BreakpointEditAction::EditLogMessage(log_message.into()),
18025        cx,
18026    );
18027}
18028
18029#[gpui::test]
18030async fn test_breakpoint_toggling(cx: &mut TestAppContext) {
18031    init_test(cx, |_| {});
18032
18033    let sample_text = "First line\nSecond line\nThird line\nFourth line".to_string();
18034    let fs = FakeFs::new(cx.executor());
18035    fs.insert_tree(
18036        path!("/a"),
18037        json!({
18038            "main.rs": sample_text,
18039        }),
18040    )
18041    .await;
18042    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18043    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
18044    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
18045
18046    let fs = FakeFs::new(cx.executor());
18047    fs.insert_tree(
18048        path!("/a"),
18049        json!({
18050            "main.rs": sample_text,
18051        }),
18052    )
18053    .await;
18054    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18055    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
18056    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
18057    let worktree_id = workspace
18058        .update(cx, |workspace, _window, cx| {
18059            workspace.project().update(cx, |project, cx| {
18060                project.worktrees(cx).next().unwrap().read(cx).id()
18061            })
18062        })
18063        .unwrap();
18064
18065    let buffer = project
18066        .update(cx, |project, cx| {
18067            project.open_buffer((worktree_id, "main.rs"), cx)
18068        })
18069        .await
18070        .unwrap();
18071
18072    let (editor, cx) = cx.add_window_view(|window, cx| {
18073        Editor::new(
18074            EditorMode::full(),
18075            MultiBuffer::build_from_buffer(buffer, cx),
18076            Some(project.clone()),
18077            window,
18078            cx,
18079        )
18080    });
18081
18082    let project_path = editor.update(cx, |editor, cx| editor.project_path(cx).unwrap());
18083    let abs_path = project.read_with(cx, |project, cx| {
18084        project
18085            .absolute_path(&project_path, cx)
18086            .map(|path_buf| Arc::from(path_buf.to_owned()))
18087            .unwrap()
18088    });
18089
18090    // assert we can add breakpoint on the first line
18091    editor.update_in(cx, |editor, window, cx| {
18092        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18093        editor.move_to_end(&MoveToEnd, window, cx);
18094        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18095    });
18096
18097    let breakpoints = editor.update(cx, |editor, cx| {
18098        editor
18099            .breakpoint_store()
18100            .as_ref()
18101            .unwrap()
18102            .read(cx)
18103            .all_breakpoints(cx)
18104            .clone()
18105    });
18106
18107    assert_eq!(1, breakpoints.len());
18108    assert_breakpoint(
18109        &breakpoints,
18110        &abs_path,
18111        vec![
18112            (0, Breakpoint::new_standard()),
18113            (3, Breakpoint::new_standard()),
18114        ],
18115    );
18116
18117    editor.update_in(cx, |editor, window, cx| {
18118        editor.move_to_beginning(&MoveToBeginning, window, cx);
18119        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18120    });
18121
18122    let breakpoints = editor.update(cx, |editor, cx| {
18123        editor
18124            .breakpoint_store()
18125            .as_ref()
18126            .unwrap()
18127            .read(cx)
18128            .all_breakpoints(cx)
18129            .clone()
18130    });
18131
18132    assert_eq!(1, breakpoints.len());
18133    assert_breakpoint(
18134        &breakpoints,
18135        &abs_path,
18136        vec![(3, Breakpoint::new_standard())],
18137    );
18138
18139    editor.update_in(cx, |editor, window, cx| {
18140        editor.move_to_end(&MoveToEnd, window, cx);
18141        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18142    });
18143
18144    let breakpoints = editor.update(cx, |editor, cx| {
18145        editor
18146            .breakpoint_store()
18147            .as_ref()
18148            .unwrap()
18149            .read(cx)
18150            .all_breakpoints(cx)
18151            .clone()
18152    });
18153
18154    assert_eq!(0, breakpoints.len());
18155    assert_breakpoint(&breakpoints, &abs_path, vec![]);
18156}
18157
18158#[gpui::test]
18159async fn test_log_breakpoint_editing(cx: &mut TestAppContext) {
18160    init_test(cx, |_| {});
18161
18162    let sample_text = "First line\nSecond line\nThird line\nFourth line".to_string();
18163
18164    let fs = FakeFs::new(cx.executor());
18165    fs.insert_tree(
18166        path!("/a"),
18167        json!({
18168            "main.rs": sample_text,
18169        }),
18170    )
18171    .await;
18172    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18173    let (workspace, cx) =
18174        cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
18175
18176    let worktree_id = workspace.update(cx, |workspace, cx| {
18177        workspace.project().update(cx, |project, cx| {
18178            project.worktrees(cx).next().unwrap().read(cx).id()
18179        })
18180    });
18181
18182    let buffer = project
18183        .update(cx, |project, cx| {
18184            project.open_buffer((worktree_id, "main.rs"), cx)
18185        })
18186        .await
18187        .unwrap();
18188
18189    let (editor, cx) = cx.add_window_view(|window, cx| {
18190        Editor::new(
18191            EditorMode::full(),
18192            MultiBuffer::build_from_buffer(buffer, cx),
18193            Some(project.clone()),
18194            window,
18195            cx,
18196        )
18197    });
18198
18199    let project_path = editor.update(cx, |editor, cx| editor.project_path(cx).unwrap());
18200    let abs_path = project.read_with(cx, |project, cx| {
18201        project
18202            .absolute_path(&project_path, cx)
18203            .map(|path_buf| Arc::from(path_buf.to_owned()))
18204            .unwrap()
18205    });
18206
18207    editor.update_in(cx, |editor, window, cx| {
18208        add_log_breakpoint_at_cursor(editor, "hello world", window, cx);
18209    });
18210
18211    let breakpoints = editor.update(cx, |editor, cx| {
18212        editor
18213            .breakpoint_store()
18214            .as_ref()
18215            .unwrap()
18216            .read(cx)
18217            .all_breakpoints(cx)
18218            .clone()
18219    });
18220
18221    assert_breakpoint(
18222        &breakpoints,
18223        &abs_path,
18224        vec![(0, Breakpoint::new_log("hello world"))],
18225    );
18226
18227    // Removing a log message from a log breakpoint should remove it
18228    editor.update_in(cx, |editor, window, cx| {
18229        add_log_breakpoint_at_cursor(editor, "", window, cx);
18230    });
18231
18232    let breakpoints = editor.update(cx, |editor, cx| {
18233        editor
18234            .breakpoint_store()
18235            .as_ref()
18236            .unwrap()
18237            .read(cx)
18238            .all_breakpoints(cx)
18239            .clone()
18240    });
18241
18242    assert_breakpoint(&breakpoints, &abs_path, vec![]);
18243
18244    editor.update_in(cx, |editor, window, cx| {
18245        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18246        editor.move_to_end(&MoveToEnd, window, cx);
18247        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18248        // Not adding a log message to a standard breakpoint shouldn't remove it
18249        add_log_breakpoint_at_cursor(editor, "", window, cx);
18250    });
18251
18252    let breakpoints = editor.update(cx, |editor, cx| {
18253        editor
18254            .breakpoint_store()
18255            .as_ref()
18256            .unwrap()
18257            .read(cx)
18258            .all_breakpoints(cx)
18259            .clone()
18260    });
18261
18262    assert_breakpoint(
18263        &breakpoints,
18264        &abs_path,
18265        vec![
18266            (0, Breakpoint::new_standard()),
18267            (3, Breakpoint::new_standard()),
18268        ],
18269    );
18270
18271    editor.update_in(cx, |editor, window, cx| {
18272        add_log_breakpoint_at_cursor(editor, "hello world", window, cx);
18273    });
18274
18275    let breakpoints = editor.update(cx, |editor, cx| {
18276        editor
18277            .breakpoint_store()
18278            .as_ref()
18279            .unwrap()
18280            .read(cx)
18281            .all_breakpoints(cx)
18282            .clone()
18283    });
18284
18285    assert_breakpoint(
18286        &breakpoints,
18287        &abs_path,
18288        vec![
18289            (0, Breakpoint::new_standard()),
18290            (3, Breakpoint::new_log("hello world")),
18291        ],
18292    );
18293
18294    editor.update_in(cx, |editor, window, cx| {
18295        add_log_breakpoint_at_cursor(editor, "hello Earth!!", window, cx);
18296    });
18297
18298    let breakpoints = editor.update(cx, |editor, cx| {
18299        editor
18300            .breakpoint_store()
18301            .as_ref()
18302            .unwrap()
18303            .read(cx)
18304            .all_breakpoints(cx)
18305            .clone()
18306    });
18307
18308    assert_breakpoint(
18309        &breakpoints,
18310        &abs_path,
18311        vec![
18312            (0, Breakpoint::new_standard()),
18313            (3, Breakpoint::new_log("hello Earth!!")),
18314        ],
18315    );
18316}
18317
18318/// This also tests that Editor::breakpoint_at_cursor_head is working properly
18319/// we had some issues where we wouldn't find a breakpoint at Point {row: 0, col: 0}
18320/// or when breakpoints were placed out of order. This tests for a regression too
18321#[gpui::test]
18322async fn test_breakpoint_enabling_and_disabling(cx: &mut TestAppContext) {
18323    init_test(cx, |_| {});
18324
18325    let sample_text = "First line\nSecond line\nThird line\nFourth line".to_string();
18326    let fs = FakeFs::new(cx.executor());
18327    fs.insert_tree(
18328        path!("/a"),
18329        json!({
18330            "main.rs": sample_text,
18331        }),
18332    )
18333    .await;
18334    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18335    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
18336    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
18337
18338    let fs = FakeFs::new(cx.executor());
18339    fs.insert_tree(
18340        path!("/a"),
18341        json!({
18342            "main.rs": sample_text,
18343        }),
18344    )
18345    .await;
18346    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18347    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
18348    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
18349    let worktree_id = workspace
18350        .update(cx, |workspace, _window, cx| {
18351            workspace.project().update(cx, |project, cx| {
18352                project.worktrees(cx).next().unwrap().read(cx).id()
18353            })
18354        })
18355        .unwrap();
18356
18357    let buffer = project
18358        .update(cx, |project, cx| {
18359            project.open_buffer((worktree_id, "main.rs"), cx)
18360        })
18361        .await
18362        .unwrap();
18363
18364    let (editor, cx) = cx.add_window_view(|window, cx| {
18365        Editor::new(
18366            EditorMode::full(),
18367            MultiBuffer::build_from_buffer(buffer, cx),
18368            Some(project.clone()),
18369            window,
18370            cx,
18371        )
18372    });
18373
18374    let project_path = editor.update(cx, |editor, cx| editor.project_path(cx).unwrap());
18375    let abs_path = project.read_with(cx, |project, cx| {
18376        project
18377            .absolute_path(&project_path, cx)
18378            .map(|path_buf| Arc::from(path_buf.to_owned()))
18379            .unwrap()
18380    });
18381
18382    // assert we can add breakpoint on the first line
18383    editor.update_in(cx, |editor, window, cx| {
18384        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18385        editor.move_to_end(&MoveToEnd, window, cx);
18386        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18387        editor.move_up(&MoveUp, window, cx);
18388        editor.toggle_breakpoint(&actions::ToggleBreakpoint, window, cx);
18389    });
18390
18391    let breakpoints = editor.update(cx, |editor, cx| {
18392        editor
18393            .breakpoint_store()
18394            .as_ref()
18395            .unwrap()
18396            .read(cx)
18397            .all_breakpoints(cx)
18398            .clone()
18399    });
18400
18401    assert_eq!(1, breakpoints.len());
18402    assert_breakpoint(
18403        &breakpoints,
18404        &abs_path,
18405        vec![
18406            (0, Breakpoint::new_standard()),
18407            (2, Breakpoint::new_standard()),
18408            (3, Breakpoint::new_standard()),
18409        ],
18410    );
18411
18412    editor.update_in(cx, |editor, window, cx| {
18413        editor.move_to_beginning(&MoveToBeginning, window, cx);
18414        editor.disable_breakpoint(&actions::DisableBreakpoint, window, cx);
18415        editor.move_to_end(&MoveToEnd, window, cx);
18416        editor.disable_breakpoint(&actions::DisableBreakpoint, window, cx);
18417        // Disabling a breakpoint that doesn't exist should do nothing
18418        editor.move_up(&MoveUp, window, cx);
18419        editor.move_up(&MoveUp, window, cx);
18420        editor.disable_breakpoint(&actions::DisableBreakpoint, window, cx);
18421    });
18422
18423    let breakpoints = editor.update(cx, |editor, cx| {
18424        editor
18425            .breakpoint_store()
18426            .as_ref()
18427            .unwrap()
18428            .read(cx)
18429            .all_breakpoints(cx)
18430            .clone()
18431    });
18432
18433    let disable_breakpoint = {
18434        let mut bp = Breakpoint::new_standard();
18435        bp.state = BreakpointState::Disabled;
18436        bp
18437    };
18438
18439    assert_eq!(1, breakpoints.len());
18440    assert_breakpoint(
18441        &breakpoints,
18442        &abs_path,
18443        vec![
18444            (0, disable_breakpoint.clone()),
18445            (2, Breakpoint::new_standard()),
18446            (3, disable_breakpoint.clone()),
18447        ],
18448    );
18449
18450    editor.update_in(cx, |editor, window, cx| {
18451        editor.move_to_beginning(&MoveToBeginning, window, cx);
18452        editor.enable_breakpoint(&actions::EnableBreakpoint, window, cx);
18453        editor.move_to_end(&MoveToEnd, window, cx);
18454        editor.enable_breakpoint(&actions::EnableBreakpoint, window, cx);
18455        editor.move_up(&MoveUp, window, cx);
18456        editor.disable_breakpoint(&actions::DisableBreakpoint, window, cx);
18457    });
18458
18459    let breakpoints = editor.update(cx, |editor, cx| {
18460        editor
18461            .breakpoint_store()
18462            .as_ref()
18463            .unwrap()
18464            .read(cx)
18465            .all_breakpoints(cx)
18466            .clone()
18467    });
18468
18469    assert_eq!(1, breakpoints.len());
18470    assert_breakpoint(
18471        &breakpoints,
18472        &abs_path,
18473        vec![
18474            (0, Breakpoint::new_standard()),
18475            (2, disable_breakpoint),
18476            (3, Breakpoint::new_standard()),
18477        ],
18478    );
18479}
18480
18481#[gpui::test]
18482async fn test_rename_with_duplicate_edits(cx: &mut TestAppContext) {
18483    init_test(cx, |_| {});
18484    let capabilities = lsp::ServerCapabilities {
18485        rename_provider: Some(lsp::OneOf::Right(lsp::RenameOptions {
18486            prepare_provider: Some(true),
18487            work_done_progress_options: Default::default(),
18488        })),
18489        ..Default::default()
18490    };
18491    let mut cx = EditorLspTestContext::new_rust(capabilities, cx).await;
18492
18493    cx.set_state(indoc! {"
18494        struct Fˇoo {}
18495    "});
18496
18497    cx.update_editor(|editor, _, cx| {
18498        let highlight_range = Point::new(0, 7)..Point::new(0, 10);
18499        let highlight_range = highlight_range.to_anchors(&editor.buffer().read(cx).snapshot(cx));
18500        editor.highlight_background::<DocumentHighlightRead>(
18501            &[highlight_range],
18502            |c| c.editor_document_highlight_read_background,
18503            cx,
18504        );
18505    });
18506
18507    let mut prepare_rename_handler = cx
18508        .set_request_handler::<lsp::request::PrepareRenameRequest, _, _>(
18509            move |_, _, _| async move {
18510                Ok(Some(lsp::PrepareRenameResponse::Range(lsp::Range {
18511                    start: lsp::Position {
18512                        line: 0,
18513                        character: 7,
18514                    },
18515                    end: lsp::Position {
18516                        line: 0,
18517                        character: 10,
18518                    },
18519                })))
18520            },
18521        );
18522    let prepare_rename_task = cx
18523        .update_editor(|e, window, cx| e.rename(&Rename, window, cx))
18524        .expect("Prepare rename was not started");
18525    prepare_rename_handler.next().await.unwrap();
18526    prepare_rename_task.await.expect("Prepare rename failed");
18527
18528    let mut rename_handler =
18529        cx.set_request_handler::<lsp::request::Rename, _, _>(move |url, _, _| async move {
18530            let edit = lsp::TextEdit {
18531                range: lsp::Range {
18532                    start: lsp::Position {
18533                        line: 0,
18534                        character: 7,
18535                    },
18536                    end: lsp::Position {
18537                        line: 0,
18538                        character: 10,
18539                    },
18540                },
18541                new_text: "FooRenamed".to_string(),
18542            };
18543            Ok(Some(lsp::WorkspaceEdit::new(
18544                // Specify the same edit twice
18545                std::collections::HashMap::from_iter(Some((url, vec![edit.clone(), edit]))),
18546            )))
18547        });
18548    let rename_task = cx
18549        .update_editor(|e, window, cx| e.confirm_rename(&ConfirmRename, window, cx))
18550        .expect("Confirm rename was not started");
18551    rename_handler.next().await.unwrap();
18552    rename_task.await.expect("Confirm rename failed");
18553    cx.run_until_parked();
18554
18555    // Despite two edits, only one is actually applied as those are identical
18556    cx.assert_editor_state(indoc! {"
18557        struct FooRenamedˇ {}
18558    "});
18559}
18560
18561#[gpui::test]
18562async fn test_rename_without_prepare(cx: &mut TestAppContext) {
18563    init_test(cx, |_| {});
18564    // These capabilities indicate that the server does not support prepare rename.
18565    let capabilities = lsp::ServerCapabilities {
18566        rename_provider: Some(lsp::OneOf::Left(true)),
18567        ..Default::default()
18568    };
18569    let mut cx = EditorLspTestContext::new_rust(capabilities, cx).await;
18570
18571    cx.set_state(indoc! {"
18572        struct Fˇoo {}
18573    "});
18574
18575    cx.update_editor(|editor, _window, cx| {
18576        let highlight_range = Point::new(0, 7)..Point::new(0, 10);
18577        let highlight_range = highlight_range.to_anchors(&editor.buffer().read(cx).snapshot(cx));
18578        editor.highlight_background::<DocumentHighlightRead>(
18579            &[highlight_range],
18580            |c| c.editor_document_highlight_read_background,
18581            cx,
18582        );
18583    });
18584
18585    cx.update_editor(|e, window, cx| e.rename(&Rename, window, cx))
18586        .expect("Prepare rename was not started")
18587        .await
18588        .expect("Prepare rename failed");
18589
18590    let mut rename_handler =
18591        cx.set_request_handler::<lsp::request::Rename, _, _>(move |url, _, _| async move {
18592            let edit = lsp::TextEdit {
18593                range: lsp::Range {
18594                    start: lsp::Position {
18595                        line: 0,
18596                        character: 7,
18597                    },
18598                    end: lsp::Position {
18599                        line: 0,
18600                        character: 10,
18601                    },
18602                },
18603                new_text: "FooRenamed".to_string(),
18604            };
18605            Ok(Some(lsp::WorkspaceEdit::new(
18606                std::collections::HashMap::from_iter(Some((url, vec![edit]))),
18607            )))
18608        });
18609    let rename_task = cx
18610        .update_editor(|e, window, cx| e.confirm_rename(&ConfirmRename, window, cx))
18611        .expect("Confirm rename was not started");
18612    rename_handler.next().await.unwrap();
18613    rename_task.await.expect("Confirm rename failed");
18614    cx.run_until_parked();
18615
18616    // Correct range is renamed, as `surrounding_word` is used to find it.
18617    cx.assert_editor_state(indoc! {"
18618        struct FooRenamedˇ {}
18619    "});
18620}
18621
18622#[gpui::test]
18623async fn test_tree_sitter_brackets_newline_insertion(cx: &mut TestAppContext) {
18624    init_test(cx, |_| {});
18625    let mut cx = EditorTestContext::new(cx).await;
18626
18627    let language = Arc::new(
18628        Language::new(
18629            LanguageConfig::default(),
18630            Some(tree_sitter_html::LANGUAGE.into()),
18631        )
18632        .with_brackets_query(
18633            r#"
18634            ("<" @open "/>" @close)
18635            ("</" @open ">" @close)
18636            ("<" @open ">" @close)
18637            ("\"" @open "\"" @close)
18638            ((element (start_tag) @open (end_tag) @close) (#set! newline.only))
18639        "#,
18640        )
18641        .unwrap(),
18642    );
18643    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
18644
18645    cx.set_state(indoc! {"
18646        <span>ˇ</span>
18647    "});
18648    cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
18649    cx.assert_editor_state(indoc! {"
18650        <span>
18651        ˇ
18652        </span>
18653    "});
18654
18655    cx.set_state(indoc! {"
18656        <span><span></span>ˇ</span>
18657    "});
18658    cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
18659    cx.assert_editor_state(indoc! {"
18660        <span><span></span>
18661        ˇ</span>
18662    "});
18663
18664    cx.set_state(indoc! {"
18665        <span>ˇ
18666        </span>
18667    "});
18668    cx.update_editor(|e, window, cx| e.newline(&Newline, window, cx));
18669    cx.assert_editor_state(indoc! {"
18670        <span>
18671        ˇ
18672        </span>
18673    "});
18674}
18675
18676#[gpui::test(iterations = 10)]
18677async fn test_apply_code_lens_actions_with_commands(cx: &mut gpui::TestAppContext) {
18678    init_test(cx, |_| {});
18679
18680    let fs = FakeFs::new(cx.executor());
18681    fs.insert_tree(
18682        path!("/dir"),
18683        json!({
18684            "a.ts": "a",
18685        }),
18686    )
18687    .await;
18688
18689    let project = Project::test(fs, [path!("/dir").as_ref()], cx).await;
18690    let workspace = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
18691    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
18692
18693    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
18694    language_registry.add(Arc::new(Language::new(
18695        LanguageConfig {
18696            name: "TypeScript".into(),
18697            matcher: LanguageMatcher {
18698                path_suffixes: vec!["ts".to_string()],
18699                ..Default::default()
18700            },
18701            ..Default::default()
18702        },
18703        Some(tree_sitter_typescript::LANGUAGE_TYPESCRIPT.into()),
18704    )));
18705    let mut fake_language_servers = language_registry.register_fake_lsp(
18706        "TypeScript",
18707        FakeLspAdapter {
18708            capabilities: lsp::ServerCapabilities {
18709                code_lens_provider: Some(lsp::CodeLensOptions {
18710                    resolve_provider: Some(true),
18711                }),
18712                execute_command_provider: Some(lsp::ExecuteCommandOptions {
18713                    commands: vec!["_the/command".to_string()],
18714                    ..lsp::ExecuteCommandOptions::default()
18715                }),
18716                ..lsp::ServerCapabilities::default()
18717            },
18718            ..FakeLspAdapter::default()
18719        },
18720    );
18721
18722    let (buffer, _handle) = project
18723        .update(cx, |p, cx| {
18724            p.open_local_buffer_with_lsp(path!("/dir/a.ts"), cx)
18725        })
18726        .await
18727        .unwrap();
18728    cx.executor().run_until_parked();
18729
18730    let fake_server = fake_language_servers.next().await.unwrap();
18731
18732    let buffer_snapshot = buffer.update(cx, |buffer, _| buffer.snapshot());
18733    let anchor = buffer_snapshot.anchor_at(0, text::Bias::Left);
18734    drop(buffer_snapshot);
18735    let actions = cx
18736        .update_window(*workspace, |_, window, cx| {
18737            project.code_actions(&buffer, anchor..anchor, window, cx)
18738        })
18739        .unwrap();
18740
18741    fake_server
18742        .set_request_handler::<lsp::request::CodeLensRequest, _, _>(|_, _| async move {
18743            Ok(Some(vec![
18744                lsp::CodeLens {
18745                    range: lsp::Range::default(),
18746                    command: Some(lsp::Command {
18747                        title: "Code lens command".to_owned(),
18748                        command: "_the/command".to_owned(),
18749                        arguments: None,
18750                    }),
18751                    data: None,
18752                },
18753                lsp::CodeLens {
18754                    range: lsp::Range::default(),
18755                    command: Some(lsp::Command {
18756                        title: "Command not in capabilities".to_owned(),
18757                        command: "not in capabilities".to_owned(),
18758                        arguments: None,
18759                    }),
18760                    data: None,
18761                },
18762                lsp::CodeLens {
18763                    range: lsp::Range {
18764                        start: lsp::Position {
18765                            line: 1,
18766                            character: 1,
18767                        },
18768                        end: lsp::Position {
18769                            line: 1,
18770                            character: 1,
18771                        },
18772                    },
18773                    command: Some(lsp::Command {
18774                        title: "Command not in range".to_owned(),
18775                        command: "_the/command".to_owned(),
18776                        arguments: None,
18777                    }),
18778                    data: None,
18779                },
18780            ]))
18781        })
18782        .next()
18783        .await;
18784
18785    let actions = actions.await.unwrap();
18786    assert_eq!(
18787        actions.len(),
18788        1,
18789        "Should have only one valid action for the 0..0 range"
18790    );
18791    let action = actions[0].clone();
18792    let apply = project.update(cx, |project, cx| {
18793        project.apply_code_action(buffer.clone(), action, true, cx)
18794    });
18795
18796    // Resolving the code action does not populate its edits. In absence of
18797    // edits, we must execute the given command.
18798    fake_server.set_request_handler::<lsp::request::CodeLensResolve, _, _>(
18799        |mut lens, _| async move {
18800            let lens_command = lens.command.as_mut().expect("should have a command");
18801            assert_eq!(lens_command.title, "Code lens command");
18802            lens_command.arguments = Some(vec![json!("the-argument")]);
18803            Ok(lens)
18804        },
18805    );
18806
18807    // While executing the command, the language server sends the editor
18808    // a `workspaceEdit` request.
18809    fake_server
18810        .set_request_handler::<lsp::request::ExecuteCommand, _, _>({
18811            let fake = fake_server.clone();
18812            move |params, _| {
18813                assert_eq!(params.command, "_the/command");
18814                let fake = fake.clone();
18815                async move {
18816                    fake.server
18817                        .request::<lsp::request::ApplyWorkspaceEdit>(
18818                            lsp::ApplyWorkspaceEditParams {
18819                                label: None,
18820                                edit: lsp::WorkspaceEdit {
18821                                    changes: Some(
18822                                        [(
18823                                            lsp::Url::from_file_path(path!("/dir/a.ts")).unwrap(),
18824                                            vec![lsp::TextEdit {
18825                                                range: lsp::Range::new(
18826                                                    lsp::Position::new(0, 0),
18827                                                    lsp::Position::new(0, 0),
18828                                                ),
18829                                                new_text: "X".into(),
18830                                            }],
18831                                        )]
18832                                        .into_iter()
18833                                        .collect(),
18834                                    ),
18835                                    ..Default::default()
18836                                },
18837                            },
18838                        )
18839                        .await
18840                        .unwrap();
18841                    Ok(Some(json!(null)))
18842                }
18843            }
18844        })
18845        .next()
18846        .await;
18847
18848    // Applying the code lens command returns a project transaction containing the edits
18849    // sent by the language server in its `workspaceEdit` request.
18850    let transaction = apply.await.unwrap();
18851    assert!(transaction.0.contains_key(&buffer));
18852    buffer.update(cx, |buffer, cx| {
18853        assert_eq!(buffer.text(), "Xa");
18854        buffer.undo(cx);
18855        assert_eq!(buffer.text(), "a");
18856    });
18857}
18858
18859#[gpui::test]
18860async fn test_editor_restore_data_different_in_panes(cx: &mut TestAppContext) {
18861    init_test(cx, |_| {});
18862
18863    let fs = FakeFs::new(cx.executor());
18864    let main_text = r#"fn main() {
18865println!("1");
18866println!("2");
18867println!("3");
18868println!("4");
18869println!("5");
18870}"#;
18871    let lib_text = "mod foo {}";
18872    fs.insert_tree(
18873        path!("/a"),
18874        json!({
18875            "lib.rs": lib_text,
18876            "main.rs": main_text,
18877        }),
18878    )
18879    .await;
18880
18881    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
18882    let (workspace, cx) =
18883        cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
18884    let worktree_id = workspace.update(cx, |workspace, cx| {
18885        workspace.project().update(cx, |project, cx| {
18886            project.worktrees(cx).next().unwrap().read(cx).id()
18887        })
18888    });
18889
18890    let expected_ranges = vec![
18891        Point::new(0, 0)..Point::new(0, 0),
18892        Point::new(1, 0)..Point::new(1, 1),
18893        Point::new(2, 0)..Point::new(2, 2),
18894        Point::new(3, 0)..Point::new(3, 3),
18895    ];
18896
18897    let pane_1 = workspace.update(cx, |workspace, _| workspace.active_pane().clone());
18898    let editor_1 = workspace
18899        .update_in(cx, |workspace, window, cx| {
18900            workspace.open_path(
18901                (worktree_id, "main.rs"),
18902                Some(pane_1.downgrade()),
18903                true,
18904                window,
18905                cx,
18906            )
18907        })
18908        .unwrap()
18909        .await
18910        .downcast::<Editor>()
18911        .unwrap();
18912    pane_1.update(cx, |pane, cx| {
18913        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
18914        open_editor.update(cx, |editor, cx| {
18915            assert_eq!(
18916                editor.display_text(cx),
18917                main_text,
18918                "Original main.rs text on initial open",
18919            );
18920            assert_eq!(
18921                editor
18922                    .selections
18923                    .all::<Point>(cx)
18924                    .into_iter()
18925                    .map(|s| s.range())
18926                    .collect::<Vec<_>>(),
18927                vec![Point::zero()..Point::zero()],
18928                "Default selections on initial open",
18929            );
18930        })
18931    });
18932    editor_1.update_in(cx, |editor, window, cx| {
18933        editor.change_selections(None, window, cx, |s| {
18934            s.select_ranges(expected_ranges.clone());
18935        });
18936    });
18937
18938    let pane_2 = workspace.update_in(cx, |workspace, window, cx| {
18939        workspace.split_pane(pane_1.clone(), SplitDirection::Right, window, cx)
18940    });
18941    let editor_2 = workspace
18942        .update_in(cx, |workspace, window, cx| {
18943            workspace.open_path(
18944                (worktree_id, "main.rs"),
18945                Some(pane_2.downgrade()),
18946                true,
18947                window,
18948                cx,
18949            )
18950        })
18951        .unwrap()
18952        .await
18953        .downcast::<Editor>()
18954        .unwrap();
18955    pane_2.update(cx, |pane, cx| {
18956        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
18957        open_editor.update(cx, |editor, cx| {
18958            assert_eq!(
18959                editor.display_text(cx),
18960                main_text,
18961                "Original main.rs text on initial open in another panel",
18962            );
18963            assert_eq!(
18964                editor
18965                    .selections
18966                    .all::<Point>(cx)
18967                    .into_iter()
18968                    .map(|s| s.range())
18969                    .collect::<Vec<_>>(),
18970                vec![Point::zero()..Point::zero()],
18971                "Default selections on initial open in another panel",
18972            );
18973        })
18974    });
18975
18976    editor_2.update_in(cx, |editor, window, cx| {
18977        editor.fold_ranges(expected_ranges.clone(), false, window, cx);
18978    });
18979
18980    let _other_editor_1 = workspace
18981        .update_in(cx, |workspace, window, cx| {
18982            workspace.open_path(
18983                (worktree_id, "lib.rs"),
18984                Some(pane_1.downgrade()),
18985                true,
18986                window,
18987                cx,
18988            )
18989        })
18990        .unwrap()
18991        .await
18992        .downcast::<Editor>()
18993        .unwrap();
18994    pane_1
18995        .update_in(cx, |pane, window, cx| {
18996            pane.close_inactive_items(&CloseInactiveItems::default(), window, cx)
18997                .unwrap()
18998        })
18999        .await
19000        .unwrap();
19001    drop(editor_1);
19002    pane_1.update(cx, |pane, cx| {
19003        pane.active_item()
19004            .unwrap()
19005            .downcast::<Editor>()
19006            .unwrap()
19007            .update(cx, |editor, cx| {
19008                assert_eq!(
19009                    editor.display_text(cx),
19010                    lib_text,
19011                    "Other file should be open and active",
19012                );
19013            });
19014        assert_eq!(pane.items().count(), 1, "No other editors should be open");
19015    });
19016
19017    let _other_editor_2 = workspace
19018        .update_in(cx, |workspace, window, cx| {
19019            workspace.open_path(
19020                (worktree_id, "lib.rs"),
19021                Some(pane_2.downgrade()),
19022                true,
19023                window,
19024                cx,
19025            )
19026        })
19027        .unwrap()
19028        .await
19029        .downcast::<Editor>()
19030        .unwrap();
19031    pane_2
19032        .update_in(cx, |pane, window, cx| {
19033            pane.close_inactive_items(&CloseInactiveItems::default(), window, cx)
19034                .unwrap()
19035        })
19036        .await
19037        .unwrap();
19038    drop(editor_2);
19039    pane_2.update(cx, |pane, cx| {
19040        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
19041        open_editor.update(cx, |editor, cx| {
19042            assert_eq!(
19043                editor.display_text(cx),
19044                lib_text,
19045                "Other file should be open and active in another panel too",
19046            );
19047        });
19048        assert_eq!(
19049            pane.items().count(),
19050            1,
19051            "No other editors should be open in another pane",
19052        );
19053    });
19054
19055    let _editor_1_reopened = workspace
19056        .update_in(cx, |workspace, window, cx| {
19057            workspace.open_path(
19058                (worktree_id, "main.rs"),
19059                Some(pane_1.downgrade()),
19060                true,
19061                window,
19062                cx,
19063            )
19064        })
19065        .unwrap()
19066        .await
19067        .downcast::<Editor>()
19068        .unwrap();
19069    let _editor_2_reopened = workspace
19070        .update_in(cx, |workspace, window, cx| {
19071            workspace.open_path(
19072                (worktree_id, "main.rs"),
19073                Some(pane_2.downgrade()),
19074                true,
19075                window,
19076                cx,
19077            )
19078        })
19079        .unwrap()
19080        .await
19081        .downcast::<Editor>()
19082        .unwrap();
19083    pane_1.update(cx, |pane, cx| {
19084        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
19085        open_editor.update(cx, |editor, cx| {
19086            assert_eq!(
19087                editor.display_text(cx),
19088                main_text,
19089                "Previous editor in the 1st panel had no extra text manipulations and should get none on reopen",
19090            );
19091            assert_eq!(
19092                editor
19093                    .selections
19094                    .all::<Point>(cx)
19095                    .into_iter()
19096                    .map(|s| s.range())
19097                    .collect::<Vec<_>>(),
19098                expected_ranges,
19099                "Previous editor in the 1st panel had selections and should get them restored on reopen",
19100            );
19101        })
19102    });
19103    pane_2.update(cx, |pane, cx| {
19104        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
19105        open_editor.update(cx, |editor, cx| {
19106            assert_eq!(
19107                editor.display_text(cx),
19108                r#"fn main() {
19109⋯rintln!("1");
19110⋯intln!("2");
19111⋯ntln!("3");
19112println!("4");
19113println!("5");
19114}"#,
19115                "Previous editor in the 2nd pane had folds and should restore those on reopen in the same pane",
19116            );
19117            assert_eq!(
19118                editor
19119                    .selections
19120                    .all::<Point>(cx)
19121                    .into_iter()
19122                    .map(|s| s.range())
19123                    .collect::<Vec<_>>(),
19124                vec![Point::zero()..Point::zero()],
19125                "Previous editor in the 2nd pane had no selections changed hence should restore none",
19126            );
19127        })
19128    });
19129}
19130
19131#[gpui::test]
19132async fn test_editor_does_not_restore_data_when_turned_off(cx: &mut TestAppContext) {
19133    init_test(cx, |_| {});
19134
19135    let fs = FakeFs::new(cx.executor());
19136    let main_text = r#"fn main() {
19137println!("1");
19138println!("2");
19139println!("3");
19140println!("4");
19141println!("5");
19142}"#;
19143    let lib_text = "mod foo {}";
19144    fs.insert_tree(
19145        path!("/a"),
19146        json!({
19147            "lib.rs": lib_text,
19148            "main.rs": main_text,
19149        }),
19150    )
19151    .await;
19152
19153    let project = Project::test(fs, [path!("/a").as_ref()], cx).await;
19154    let (workspace, cx) =
19155        cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
19156    let worktree_id = workspace.update(cx, |workspace, cx| {
19157        workspace.project().update(cx, |project, cx| {
19158            project.worktrees(cx).next().unwrap().read(cx).id()
19159        })
19160    });
19161
19162    let pane = workspace.update(cx, |workspace, _| workspace.active_pane().clone());
19163    let editor = workspace
19164        .update_in(cx, |workspace, window, cx| {
19165            workspace.open_path(
19166                (worktree_id, "main.rs"),
19167                Some(pane.downgrade()),
19168                true,
19169                window,
19170                cx,
19171            )
19172        })
19173        .unwrap()
19174        .await
19175        .downcast::<Editor>()
19176        .unwrap();
19177    pane.update(cx, |pane, cx| {
19178        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
19179        open_editor.update(cx, |editor, cx| {
19180            assert_eq!(
19181                editor.display_text(cx),
19182                main_text,
19183                "Original main.rs text on initial open",
19184            );
19185        })
19186    });
19187    editor.update_in(cx, |editor, window, cx| {
19188        editor.fold_ranges(vec![Point::new(0, 0)..Point::new(0, 0)], false, window, cx);
19189    });
19190
19191    cx.update_global(|store: &mut SettingsStore, cx| {
19192        store.update_user_settings::<WorkspaceSettings>(cx, |s| {
19193            s.restore_on_file_reopen = Some(false);
19194        });
19195    });
19196    editor.update_in(cx, |editor, window, cx| {
19197        editor.fold_ranges(
19198            vec![
19199                Point::new(1, 0)..Point::new(1, 1),
19200                Point::new(2, 0)..Point::new(2, 2),
19201                Point::new(3, 0)..Point::new(3, 3),
19202            ],
19203            false,
19204            window,
19205            cx,
19206        );
19207    });
19208    pane.update_in(cx, |pane, window, cx| {
19209        pane.close_all_items(&CloseAllItems::default(), window, cx)
19210            .unwrap()
19211    })
19212    .await
19213    .unwrap();
19214    pane.update(cx, |pane, _| {
19215        assert!(pane.active_item().is_none());
19216    });
19217    cx.update_global(|store: &mut SettingsStore, cx| {
19218        store.update_user_settings::<WorkspaceSettings>(cx, |s| {
19219            s.restore_on_file_reopen = Some(true);
19220        });
19221    });
19222
19223    let _editor_reopened = workspace
19224        .update_in(cx, |workspace, window, cx| {
19225            workspace.open_path(
19226                (worktree_id, "main.rs"),
19227                Some(pane.downgrade()),
19228                true,
19229                window,
19230                cx,
19231            )
19232        })
19233        .unwrap()
19234        .await
19235        .downcast::<Editor>()
19236        .unwrap();
19237    pane.update(cx, |pane, cx| {
19238        let open_editor = pane.active_item().unwrap().downcast::<Editor>().unwrap();
19239        open_editor.update(cx, |editor, cx| {
19240            assert_eq!(
19241                editor.display_text(cx),
19242                main_text,
19243                "No folds: even after enabling the restoration, previous editor's data should not be saved to be used for the restoration"
19244            );
19245        })
19246    });
19247}
19248
19249fn empty_range(row: usize, column: usize) -> Range<DisplayPoint> {
19250    let point = DisplayPoint::new(DisplayRow(row as u32), column as u32);
19251    point..point
19252}
19253
19254fn assert_selection_ranges(marked_text: &str, editor: &mut Editor, cx: &mut Context<Editor>) {
19255    let (text, ranges) = marked_text_ranges(marked_text, true);
19256    assert_eq!(editor.text(cx), text);
19257    assert_eq!(
19258        editor.selections.ranges(cx),
19259        ranges,
19260        "Assert selections are {}",
19261        marked_text
19262    );
19263}
19264
19265pub fn handle_signature_help_request(
19266    cx: &mut EditorLspTestContext,
19267    mocked_response: lsp::SignatureHelp,
19268) -> impl Future<Output = ()> + use<> {
19269    let mut request =
19270        cx.set_request_handler::<lsp::request::SignatureHelpRequest, _, _>(move |_, _, _| {
19271            let mocked_response = mocked_response.clone();
19272            async move { Ok(Some(mocked_response)) }
19273        });
19274
19275    async move {
19276        request.next().await;
19277    }
19278}
19279
19280/// Handle completion request passing a marked string specifying where the completion
19281/// should be triggered from using '|' character, what range should be replaced, and what completions
19282/// should be returned using '<' and '>' to delimit the range.
19283///
19284/// Also see `handle_completion_request_with_insert_and_replace`.
19285#[track_caller]
19286pub fn handle_completion_request(
19287    cx: &mut EditorLspTestContext,
19288    marked_string: &str,
19289    completions: Vec<&'static str>,
19290    counter: Arc<AtomicUsize>,
19291) -> impl Future<Output = ()> {
19292    let complete_from_marker: TextRangeMarker = '|'.into();
19293    let replace_range_marker: TextRangeMarker = ('<', '>').into();
19294    let (_, mut marked_ranges) = marked_text_ranges_by(
19295        marked_string,
19296        vec![complete_from_marker.clone(), replace_range_marker.clone()],
19297    );
19298
19299    let complete_from_position =
19300        cx.to_lsp(marked_ranges.remove(&complete_from_marker).unwrap()[0].start);
19301    let replace_range =
19302        cx.to_lsp_range(marked_ranges.remove(&replace_range_marker).unwrap()[0].clone());
19303
19304    let mut request =
19305        cx.set_request_handler::<lsp::request::Completion, _, _>(move |url, params, _| {
19306            let completions = completions.clone();
19307            counter.fetch_add(1, atomic::Ordering::Release);
19308            async move {
19309                assert_eq!(params.text_document_position.text_document.uri, url.clone());
19310                assert_eq!(
19311                    params.text_document_position.position,
19312                    complete_from_position
19313                );
19314                Ok(Some(lsp::CompletionResponse::Array(
19315                    completions
19316                        .iter()
19317                        .map(|completion_text| lsp::CompletionItem {
19318                            label: completion_text.to_string(),
19319                            text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
19320                                range: replace_range,
19321                                new_text: completion_text.to_string(),
19322                            })),
19323                            ..Default::default()
19324                        })
19325                        .collect(),
19326                )))
19327            }
19328        });
19329
19330    async move {
19331        request.next().await;
19332    }
19333}
19334
19335/// Similar to `handle_completion_request`, but a [`CompletionTextEdit::InsertAndReplace`] will be
19336/// given instead, which also contains an `insert` range.
19337///
19338/// This function uses the cursor position to mimic what Rust-Analyzer provides as the `insert` range,
19339/// that is, `replace_range.start..cursor_pos`.
19340pub fn handle_completion_request_with_insert_and_replace(
19341    cx: &mut EditorLspTestContext,
19342    marked_string: &str,
19343    completions: Vec<&'static str>,
19344    counter: Arc<AtomicUsize>,
19345) -> impl Future<Output = ()> {
19346    let complete_from_marker: TextRangeMarker = '|'.into();
19347    let replace_range_marker: TextRangeMarker = ('<', '>').into();
19348    let (_, mut marked_ranges) = marked_text_ranges_by(
19349        marked_string,
19350        vec![complete_from_marker.clone(), replace_range_marker.clone()],
19351    );
19352
19353    let complete_from_position =
19354        cx.to_lsp(marked_ranges.remove(&complete_from_marker).unwrap()[0].start);
19355    let replace_range =
19356        cx.to_lsp_range(marked_ranges.remove(&replace_range_marker).unwrap()[0].clone());
19357
19358    let mut request =
19359        cx.set_request_handler::<lsp::request::Completion, _, _>(move |url, params, _| {
19360            let completions = completions.clone();
19361            counter.fetch_add(1, atomic::Ordering::Release);
19362            async move {
19363                assert_eq!(params.text_document_position.text_document.uri, url.clone());
19364                assert_eq!(
19365                    params.text_document_position.position, complete_from_position,
19366                    "marker `|` position doesn't match",
19367                );
19368                Ok(Some(lsp::CompletionResponse::Array(
19369                    completions
19370                        .iter()
19371                        .map(|completion_text| lsp::CompletionItem {
19372                            label: completion_text.to_string(),
19373                            text_edit: Some(lsp::CompletionTextEdit::InsertAndReplace(
19374                                lsp::InsertReplaceEdit {
19375                                    insert: lsp::Range {
19376                                        start: replace_range.start,
19377                                        end: complete_from_position,
19378                                    },
19379                                    replace: replace_range,
19380                                    new_text: completion_text.to_string(),
19381                                },
19382                            )),
19383                            ..Default::default()
19384                        })
19385                        .collect(),
19386                )))
19387            }
19388        });
19389
19390    async move {
19391        request.next().await;
19392    }
19393}
19394
19395fn handle_resolve_completion_request(
19396    cx: &mut EditorLspTestContext,
19397    edits: Option<Vec<(&'static str, &'static str)>>,
19398) -> impl Future<Output = ()> {
19399    let edits = edits.map(|edits| {
19400        edits
19401            .iter()
19402            .map(|(marked_string, new_text)| {
19403                let (_, marked_ranges) = marked_text_ranges(marked_string, false);
19404                let replace_range = cx.to_lsp_range(marked_ranges[0].clone());
19405                lsp::TextEdit::new(replace_range, new_text.to_string())
19406            })
19407            .collect::<Vec<_>>()
19408    });
19409
19410    let mut request =
19411        cx.set_request_handler::<lsp::request::ResolveCompletionItem, _, _>(move |_, _, _| {
19412            let edits = edits.clone();
19413            async move {
19414                Ok(lsp::CompletionItem {
19415                    additional_text_edits: edits,
19416                    ..Default::default()
19417                })
19418            }
19419        });
19420
19421    async move {
19422        request.next().await;
19423    }
19424}
19425
19426pub(crate) fn update_test_language_settings(
19427    cx: &mut TestAppContext,
19428    f: impl Fn(&mut AllLanguageSettingsContent),
19429) {
19430    cx.update(|cx| {
19431        SettingsStore::update_global(cx, |store, cx| {
19432            store.update_user_settings::<AllLanguageSettings>(cx, f);
19433        });
19434    });
19435}
19436
19437pub(crate) fn update_test_project_settings(
19438    cx: &mut TestAppContext,
19439    f: impl Fn(&mut ProjectSettings),
19440) {
19441    cx.update(|cx| {
19442        SettingsStore::update_global(cx, |store, cx| {
19443            store.update_user_settings::<ProjectSettings>(cx, f);
19444        });
19445    });
19446}
19447
19448pub(crate) fn init_test(cx: &mut TestAppContext, f: fn(&mut AllLanguageSettingsContent)) {
19449    cx.update(|cx| {
19450        assets::Assets.load_test_fonts(cx);
19451        let store = SettingsStore::test(cx);
19452        cx.set_global(store);
19453        theme::init(theme::LoadThemes::JustBase, cx);
19454        release_channel::init(SemanticVersion::default(), cx);
19455        client::init_settings(cx);
19456        language::init(cx);
19457        Project::init_settings(cx);
19458        workspace::init_settings(cx);
19459        crate::init(cx);
19460    });
19461
19462    update_test_language_settings(cx, f);
19463}
19464
19465#[track_caller]
19466fn assert_hunk_revert(
19467    not_reverted_text_with_selections: &str,
19468    expected_hunk_statuses_before: Vec<DiffHunkStatusKind>,
19469    expected_reverted_text_with_selections: &str,
19470    base_text: &str,
19471    cx: &mut EditorLspTestContext,
19472) {
19473    cx.set_state(not_reverted_text_with_selections);
19474    cx.set_head_text(base_text);
19475    cx.executor().run_until_parked();
19476
19477    let actual_hunk_statuses_before = cx.update_editor(|editor, window, cx| {
19478        let snapshot = editor.snapshot(window, cx);
19479        let reverted_hunk_statuses = snapshot
19480            .buffer_snapshot
19481            .diff_hunks_in_range(0..snapshot.buffer_snapshot.len())
19482            .map(|hunk| hunk.status().kind)
19483            .collect::<Vec<_>>();
19484
19485        editor.git_restore(&Default::default(), window, cx);
19486        reverted_hunk_statuses
19487    });
19488    cx.executor().run_until_parked();
19489    cx.assert_editor_state(expected_reverted_text_with_selections);
19490    assert_eq!(actual_hunk_statuses_before, expected_hunk_statuses_before);
19491}