editor_tests.rs

    1use super::*;
    2use crate::{
    3    scroll::scroll_amount::ScrollAmount,
    4    test::{
    5        assert_text_with_selections, build_editor, editor_lsp_test_context::EditorLspTestContext,
    6        editor_test_context::EditorTestContext, select_ranges,
    7    },
    8    JoinLines,
    9};
   10use futures::StreamExt;
   11use gpui::{
   12    div, SemanticVersion, TestAppContext, UpdateGlobal, VisualTestContext, WindowBounds,
   13    WindowOptions,
   14};
   15use indoc::indoc;
   16use language::{
   17    language_settings::{
   18        AllLanguageSettings, AllLanguageSettingsContent, LanguageSettingsContent, PrettierSettings,
   19    },
   20    BracketPairConfig,
   21    Capability::ReadWrite,
   22    FakeLspAdapter, IndentGuide, LanguageConfig, LanguageConfigOverride, LanguageMatcher,
   23    LanguageName, Override, ParsedMarkdown, Point,
   24};
   25use language_settings::{Formatter, FormatterList, IndentGuideSettings};
   26use multi_buffer::MultiBufferIndentGuide;
   27use parking_lot::Mutex;
   28use project::{buffer_store::BufferChangeSet, FakeFs};
   29use project::{
   30    lsp_command::SIGNATURE_HELP_HIGHLIGHT_CURRENT,
   31    project_settings::{LspSettings, ProjectSettings},
   32};
   33use serde_json::{self, json};
   34use std::sync::atomic::AtomicUsize;
   35use std::sync::atomic::{self, AtomicBool};
   36use std::{cell::RefCell, future::Future, rc::Rc, time::Instant};
   37use test::editor_lsp_test_context::rust_lang;
   38use unindent::Unindent;
   39use util::{
   40    assert_set_eq,
   41    test::{marked_text_ranges, marked_text_ranges_by, sample_text, TextRangeMarker},
   42};
   43use workspace::{
   44    item::{FollowEvent, FollowableItem, Item, ItemHandle},
   45    NavigationEntry, ViewId,
   46};
   47
   48#[gpui::test]
   49fn test_edit_events(cx: &mut TestAppContext) {
   50    init_test(cx, |_| {});
   51
   52    let buffer = cx.new_model(|cx| {
   53        let mut buffer = language::Buffer::local("123456", cx);
   54        buffer.set_group_interval(Duration::from_secs(1));
   55        buffer
   56    });
   57
   58    let events = Rc::new(RefCell::new(Vec::new()));
   59    let editor1 = cx.add_window({
   60        let events = events.clone();
   61        |cx| {
   62            let view = cx.view().clone();
   63            cx.subscribe(&view, move |_, _, event: &EditorEvent, _| match event {
   64                EditorEvent::Edited { .. } => events.borrow_mut().push(("editor1", "edited")),
   65                EditorEvent::BufferEdited => events.borrow_mut().push(("editor1", "buffer edited")),
   66                _ => {}
   67            })
   68            .detach();
   69            Editor::for_buffer(buffer.clone(), None, cx)
   70        }
   71    });
   72
   73    let editor2 = cx.add_window({
   74        let events = events.clone();
   75        |cx| {
   76            cx.subscribe(
   77                &cx.view().clone(),
   78                move |_, _, event: &EditorEvent, _| match event {
   79                    EditorEvent::Edited { .. } => events.borrow_mut().push(("editor2", "edited")),
   80                    EditorEvent::BufferEdited => {
   81                        events.borrow_mut().push(("editor2", "buffer edited"))
   82                    }
   83                    _ => {}
   84                },
   85            )
   86            .detach();
   87            Editor::for_buffer(buffer.clone(), None, cx)
   88        }
   89    });
   90
   91    assert_eq!(mem::take(&mut *events.borrow_mut()), []);
   92
   93    // Mutating editor 1 will emit an `Edited` event only for that editor.
   94    _ = editor1.update(cx, |editor, cx| editor.insert("X", cx));
   95    assert_eq!(
   96        mem::take(&mut *events.borrow_mut()),
   97        [
   98            ("editor1", "edited"),
   99            ("editor1", "buffer edited"),
  100            ("editor2", "buffer edited"),
  101        ]
  102    );
  103
  104    // Mutating editor 2 will emit an `Edited` event only for that editor.
  105    _ = editor2.update(cx, |editor, cx| editor.delete(&Delete, cx));
  106    assert_eq!(
  107        mem::take(&mut *events.borrow_mut()),
  108        [
  109            ("editor2", "edited"),
  110            ("editor1", "buffer edited"),
  111            ("editor2", "buffer edited"),
  112        ]
  113    );
  114
  115    // Undoing on editor 1 will emit an `Edited` event only for that editor.
  116    _ = editor1.update(cx, |editor, cx| editor.undo(&Undo, cx));
  117    assert_eq!(
  118        mem::take(&mut *events.borrow_mut()),
  119        [
  120            ("editor1", "edited"),
  121            ("editor1", "buffer edited"),
  122            ("editor2", "buffer edited"),
  123        ]
  124    );
  125
  126    // Redoing on editor 1 will emit an `Edited` event only for that editor.
  127    _ = editor1.update(cx, |editor, cx| editor.redo(&Redo, cx));
  128    assert_eq!(
  129        mem::take(&mut *events.borrow_mut()),
  130        [
  131            ("editor1", "edited"),
  132            ("editor1", "buffer edited"),
  133            ("editor2", "buffer edited"),
  134        ]
  135    );
  136
  137    // Undoing on editor 2 will emit an `Edited` event only for that editor.
  138    _ = editor2.update(cx, |editor, cx| editor.undo(&Undo, cx));
  139    assert_eq!(
  140        mem::take(&mut *events.borrow_mut()),
  141        [
  142            ("editor2", "edited"),
  143            ("editor1", "buffer edited"),
  144            ("editor2", "buffer edited"),
  145        ]
  146    );
  147
  148    // Redoing on editor 2 will emit an `Edited` event only for that editor.
  149    _ = editor2.update(cx, |editor, cx| editor.redo(&Redo, cx));
  150    assert_eq!(
  151        mem::take(&mut *events.borrow_mut()),
  152        [
  153            ("editor2", "edited"),
  154            ("editor1", "buffer edited"),
  155            ("editor2", "buffer edited"),
  156        ]
  157    );
  158
  159    // No event is emitted when the mutation is a no-op.
  160    _ = editor2.update(cx, |editor, cx| {
  161        editor.change_selections(None, cx, |s| s.select_ranges([0..0]));
  162
  163        editor.backspace(&Backspace, cx);
  164    });
  165    assert_eq!(mem::take(&mut *events.borrow_mut()), []);
  166}
  167
  168#[gpui::test]
  169fn test_undo_redo_with_selection_restoration(cx: &mut TestAppContext) {
  170    init_test(cx, |_| {});
  171
  172    let mut now = Instant::now();
  173    let group_interval = Duration::from_millis(1);
  174    let buffer = cx.new_model(|cx| {
  175        let mut buf = language::Buffer::local("123456", cx);
  176        buf.set_group_interval(group_interval);
  177        buf
  178    });
  179    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
  180    let editor = cx.add_window(|cx| build_editor(buffer.clone(), cx));
  181
  182    _ = editor.update(cx, |editor, cx| {
  183        editor.start_transaction_at(now, cx);
  184        editor.change_selections(None, cx, |s| s.select_ranges([2..4]));
  185
  186        editor.insert("cd", cx);
  187        editor.end_transaction_at(now, cx);
  188        assert_eq!(editor.text(cx), "12cd56");
  189        assert_eq!(editor.selections.ranges(cx), vec![4..4]);
  190
  191        editor.start_transaction_at(now, cx);
  192        editor.change_selections(None, cx, |s| s.select_ranges([4..5]));
  193        editor.insert("e", cx);
  194        editor.end_transaction_at(now, cx);
  195        assert_eq!(editor.text(cx), "12cde6");
  196        assert_eq!(editor.selections.ranges(cx), vec![5..5]);
  197
  198        now += group_interval + Duration::from_millis(1);
  199        editor.change_selections(None, cx, |s| s.select_ranges([2..2]));
  200
  201        // Simulate an edit in another editor
  202        buffer.update(cx, |buffer, cx| {
  203            buffer.start_transaction_at(now, cx);
  204            buffer.edit([(0..1, "a")], None, cx);
  205            buffer.edit([(1..1, "b")], None, cx);
  206            buffer.end_transaction_at(now, cx);
  207        });
  208
  209        assert_eq!(editor.text(cx), "ab2cde6");
  210        assert_eq!(editor.selections.ranges(cx), vec![3..3]);
  211
  212        // Last transaction happened past the group interval in a different editor.
  213        // Undo it individually and don't restore selections.
  214        editor.undo(&Undo, cx);
  215        assert_eq!(editor.text(cx), "12cde6");
  216        assert_eq!(editor.selections.ranges(cx), vec![2..2]);
  217
  218        // First two transactions happened within the group interval in this editor.
  219        // Undo them together and restore selections.
  220        editor.undo(&Undo, cx);
  221        editor.undo(&Undo, cx); // Undo stack is empty here, so this is a no-op.
  222        assert_eq!(editor.text(cx), "123456");
  223        assert_eq!(editor.selections.ranges(cx), vec![0..0]);
  224
  225        // Redo the first two transactions together.
  226        editor.redo(&Redo, cx);
  227        assert_eq!(editor.text(cx), "12cde6");
  228        assert_eq!(editor.selections.ranges(cx), vec![5..5]);
  229
  230        // Redo the last transaction on its own.
  231        editor.redo(&Redo, cx);
  232        assert_eq!(editor.text(cx), "ab2cde6");
  233        assert_eq!(editor.selections.ranges(cx), vec![6..6]);
  234
  235        // Test empty transactions.
  236        editor.start_transaction_at(now, cx);
  237        editor.end_transaction_at(now, cx);
  238        editor.undo(&Undo, cx);
  239        assert_eq!(editor.text(cx), "12cde6");
  240    });
  241}
  242
  243#[gpui::test]
  244fn test_ime_composition(cx: &mut TestAppContext) {
  245    init_test(cx, |_| {});
  246
  247    let buffer = cx.new_model(|cx| {
  248        let mut buffer = language::Buffer::local("abcde", cx);
  249        // Ensure automatic grouping doesn't occur.
  250        buffer.set_group_interval(Duration::ZERO);
  251        buffer
  252    });
  253
  254    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
  255    cx.add_window(|cx| {
  256        let mut editor = build_editor(buffer.clone(), cx);
  257
  258        // Start a new IME composition.
  259        editor.replace_and_mark_text_in_range(Some(0..1), "à", None, cx);
  260        editor.replace_and_mark_text_in_range(Some(0..1), "á", None, cx);
  261        editor.replace_and_mark_text_in_range(Some(0..1), "ä", None, cx);
  262        assert_eq!(editor.text(cx), "äbcde");
  263        assert_eq!(
  264            editor.marked_text_ranges(cx),
  265            Some(vec![OffsetUtf16(0)..OffsetUtf16(1)])
  266        );
  267
  268        // Finalize IME composition.
  269        editor.replace_text_in_range(None, "ā", cx);
  270        assert_eq!(editor.text(cx), "ābcde");
  271        assert_eq!(editor.marked_text_ranges(cx), None);
  272
  273        // IME composition edits are grouped and are undone/redone at once.
  274        editor.undo(&Default::default(), cx);
  275        assert_eq!(editor.text(cx), "abcde");
  276        assert_eq!(editor.marked_text_ranges(cx), None);
  277        editor.redo(&Default::default(), cx);
  278        assert_eq!(editor.text(cx), "ābcde");
  279        assert_eq!(editor.marked_text_ranges(cx), None);
  280
  281        // Start a new IME composition.
  282        editor.replace_and_mark_text_in_range(Some(0..1), "à", None, cx);
  283        assert_eq!(
  284            editor.marked_text_ranges(cx),
  285            Some(vec![OffsetUtf16(0)..OffsetUtf16(1)])
  286        );
  287
  288        // Undoing during an IME composition cancels it.
  289        editor.undo(&Default::default(), cx);
  290        assert_eq!(editor.text(cx), "ābcde");
  291        assert_eq!(editor.marked_text_ranges(cx), None);
  292
  293        // Start a new IME composition with an invalid marked range, ensuring it gets clipped.
  294        editor.replace_and_mark_text_in_range(Some(4..999), "è", None, cx);
  295        assert_eq!(editor.text(cx), "ābcdè");
  296        assert_eq!(
  297            editor.marked_text_ranges(cx),
  298            Some(vec![OffsetUtf16(4)..OffsetUtf16(5)])
  299        );
  300
  301        // Finalize IME composition with an invalid replacement range, ensuring it gets clipped.
  302        editor.replace_text_in_range(Some(4..999), "ę", cx);
  303        assert_eq!(editor.text(cx), "ābcdę");
  304        assert_eq!(editor.marked_text_ranges(cx), None);
  305
  306        // Start a new IME composition with multiple cursors.
  307        editor.change_selections(None, cx, |s| {
  308            s.select_ranges([
  309                OffsetUtf16(1)..OffsetUtf16(1),
  310                OffsetUtf16(3)..OffsetUtf16(3),
  311                OffsetUtf16(5)..OffsetUtf16(5),
  312            ])
  313        });
  314        editor.replace_and_mark_text_in_range(Some(4..5), "XYZ", None, cx);
  315        assert_eq!(editor.text(cx), "XYZbXYZdXYZ");
  316        assert_eq!(
  317            editor.marked_text_ranges(cx),
  318            Some(vec![
  319                OffsetUtf16(0)..OffsetUtf16(3),
  320                OffsetUtf16(4)..OffsetUtf16(7),
  321                OffsetUtf16(8)..OffsetUtf16(11)
  322            ])
  323        );
  324
  325        // Ensure the newly-marked range gets treated as relative to the previously-marked ranges.
  326        editor.replace_and_mark_text_in_range(Some(1..2), "1", None, cx);
  327        assert_eq!(editor.text(cx), "X1ZbX1ZdX1Z");
  328        assert_eq!(
  329            editor.marked_text_ranges(cx),
  330            Some(vec![
  331                OffsetUtf16(1)..OffsetUtf16(2),
  332                OffsetUtf16(5)..OffsetUtf16(6),
  333                OffsetUtf16(9)..OffsetUtf16(10)
  334            ])
  335        );
  336
  337        // Finalize IME composition with multiple cursors.
  338        editor.replace_text_in_range(Some(9..10), "2", cx);
  339        assert_eq!(editor.text(cx), "X2ZbX2ZdX2Z");
  340        assert_eq!(editor.marked_text_ranges(cx), None);
  341
  342        editor
  343    });
  344}
  345
  346#[gpui::test]
  347fn test_selection_with_mouse(cx: &mut TestAppContext) {
  348    init_test(cx, |_| {});
  349
  350    let editor = cx.add_window(|cx| {
  351        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
  352        build_editor(buffer, cx)
  353    });
  354
  355    _ = editor.update(cx, |view, cx| {
  356        view.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, cx);
  357    });
  358    assert_eq!(
  359        editor
  360            .update(cx, |view, cx| view.selections.display_ranges(cx))
  361            .unwrap(),
  362        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  363    );
  364
  365    _ = editor.update(cx, |view, cx| {
  366        view.update_selection(
  367            DisplayPoint::new(DisplayRow(3), 3),
  368            0,
  369            gpui::Point::<f32>::default(),
  370            cx,
  371        );
  372    });
  373
  374    assert_eq!(
  375        editor
  376            .update(cx, |view, cx| view.selections.display_ranges(cx))
  377            .unwrap(),
  378        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  379    );
  380
  381    _ = editor.update(cx, |view, cx| {
  382        view.update_selection(
  383            DisplayPoint::new(DisplayRow(1), 1),
  384            0,
  385            gpui::Point::<f32>::default(),
  386            cx,
  387        );
  388    });
  389
  390    assert_eq!(
  391        editor
  392            .update(cx, |view, cx| view.selections.display_ranges(cx))
  393            .unwrap(),
  394        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1)]
  395    );
  396
  397    _ = editor.update(cx, |view, cx| {
  398        view.end_selection(cx);
  399        view.update_selection(
  400            DisplayPoint::new(DisplayRow(3), 3),
  401            0,
  402            gpui::Point::<f32>::default(),
  403            cx,
  404        );
  405    });
  406
  407    assert_eq!(
  408        editor
  409            .update(cx, |view, cx| view.selections.display_ranges(cx))
  410            .unwrap(),
  411        [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1)]
  412    );
  413
  414    _ = editor.update(cx, |view, cx| {
  415        view.begin_selection(DisplayPoint::new(DisplayRow(3), 3), true, 1, cx);
  416        view.update_selection(
  417            DisplayPoint::new(DisplayRow(0), 0),
  418            0,
  419            gpui::Point::<f32>::default(),
  420            cx,
  421        );
  422    });
  423
  424    assert_eq!(
  425        editor
  426            .update(cx, |view, cx| view.selections.display_ranges(cx))
  427            .unwrap(),
  428        [
  429            DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(1), 1),
  430            DisplayPoint::new(DisplayRow(3), 3)..DisplayPoint::new(DisplayRow(0), 0)
  431        ]
  432    );
  433
  434    _ = editor.update(cx, |view, cx| {
  435        view.end_selection(cx);
  436    });
  437
  438    assert_eq!(
  439        editor
  440            .update(cx, |view, cx| view.selections.display_ranges(cx))
  441            .unwrap(),
  442        [DisplayPoint::new(DisplayRow(3), 3)..DisplayPoint::new(DisplayRow(0), 0)]
  443    );
  444}
  445
  446#[gpui::test]
  447fn test_multiple_cursor_removal(cx: &mut TestAppContext) {
  448    init_test(cx, |_| {});
  449
  450    let editor = cx.add_window(|cx| {
  451        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
  452        build_editor(buffer, cx)
  453    });
  454
  455    _ = editor.update(cx, |view, cx| {
  456        view.begin_selection(DisplayPoint::new(DisplayRow(2), 1), false, 1, cx);
  457    });
  458
  459    _ = editor.update(cx, |view, cx| {
  460        view.end_selection(cx);
  461    });
  462
  463    _ = editor.update(cx, |view, cx| {
  464        view.begin_selection(DisplayPoint::new(DisplayRow(3), 2), true, 1, cx);
  465    });
  466
  467    _ = editor.update(cx, |view, cx| {
  468        view.end_selection(cx);
  469    });
  470
  471    assert_eq!(
  472        editor
  473            .update(cx, |view, cx| view.selections.display_ranges(cx))
  474            .unwrap(),
  475        [
  476            DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
  477            DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)
  478        ]
  479    );
  480
  481    _ = editor.update(cx, |view, cx| {
  482        view.begin_selection(DisplayPoint::new(DisplayRow(2), 1), true, 1, cx);
  483    });
  484
  485    _ = editor.update(cx, |view, cx| {
  486        view.end_selection(cx);
  487    });
  488
  489    assert_eq!(
  490        editor
  491            .update(cx, |view, cx| view.selections.display_ranges(cx))
  492            .unwrap(),
  493        [DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)]
  494    );
  495}
  496
  497#[gpui::test]
  498fn test_canceling_pending_selection(cx: &mut TestAppContext) {
  499    init_test(cx, |_| {});
  500
  501    let view = cx.add_window(|cx| {
  502        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  503        build_editor(buffer, cx)
  504    });
  505
  506    _ = view.update(cx, |view, cx| {
  507        view.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, cx);
  508        assert_eq!(
  509            view.selections.display_ranges(cx),
  510            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  511        );
  512    });
  513
  514    _ = view.update(cx, |view, cx| {
  515        view.update_selection(
  516            DisplayPoint::new(DisplayRow(3), 3),
  517            0,
  518            gpui::Point::<f32>::default(),
  519            cx,
  520        );
  521        assert_eq!(
  522            view.selections.display_ranges(cx),
  523            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  524        );
  525    });
  526
  527    _ = view.update(cx, |view, cx| {
  528        view.cancel(&Cancel, cx);
  529        view.update_selection(
  530            DisplayPoint::new(DisplayRow(1), 1),
  531            0,
  532            gpui::Point::<f32>::default(),
  533            cx,
  534        );
  535        assert_eq!(
  536            view.selections.display_ranges(cx),
  537            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3)]
  538        );
  539    });
  540}
  541
  542#[gpui::test]
  543fn test_movement_actions_with_pending_selection(cx: &mut TestAppContext) {
  544    init_test(cx, |_| {});
  545
  546    let view = cx.add_window(|cx| {
  547        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  548        build_editor(buffer, cx)
  549    });
  550
  551    _ = view.update(cx, |view, cx| {
  552        view.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, cx);
  553        assert_eq!(
  554            view.selections.display_ranges(cx),
  555            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  556        );
  557
  558        view.move_down(&Default::default(), cx);
  559        assert_eq!(
  560            view.selections.display_ranges(cx),
  561            [DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 2)]
  562        );
  563
  564        view.begin_selection(DisplayPoint::new(DisplayRow(2), 2), false, 1, cx);
  565        assert_eq!(
  566            view.selections.display_ranges(cx),
  567            [DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(2), 2)]
  568        );
  569
  570        view.move_up(&Default::default(), cx);
  571        assert_eq!(
  572            view.selections.display_ranges(cx),
  573            [DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2)]
  574        );
  575    });
  576}
  577
  578#[gpui::test]
  579fn test_clone(cx: &mut TestAppContext) {
  580    init_test(cx, |_| {});
  581
  582    let (text, selection_ranges) = marked_text_ranges(
  583        indoc! {"
  584            one
  585            two
  586            threeˇ
  587            four
  588            fiveˇ
  589        "},
  590        true,
  591    );
  592
  593    let editor = cx.add_window(|cx| {
  594        let buffer = MultiBuffer::build_simple(&text, cx);
  595        build_editor(buffer, cx)
  596    });
  597
  598    _ = editor.update(cx, |editor, cx| {
  599        editor.change_selections(None, cx, |s| s.select_ranges(selection_ranges.clone()));
  600        editor.fold_creases(
  601            vec![
  602                Crease::simple(Point::new(1, 0)..Point::new(2, 0), FoldPlaceholder::test()),
  603                Crease::simple(Point::new(3, 0)..Point::new(4, 0), FoldPlaceholder::test()),
  604            ],
  605            true,
  606            cx,
  607        );
  608    });
  609
  610    let cloned_editor = editor
  611        .update(cx, |editor, cx| {
  612            cx.open_window(Default::default(), |cx| cx.new_view(|cx| editor.clone(cx)))
  613        })
  614        .unwrap()
  615        .unwrap();
  616
  617    let snapshot = editor.update(cx, |e, cx| e.snapshot(cx)).unwrap();
  618    let cloned_snapshot = cloned_editor.update(cx, |e, cx| e.snapshot(cx)).unwrap();
  619
  620    assert_eq!(
  621        cloned_editor
  622            .update(cx, |e, cx| e.display_text(cx))
  623            .unwrap(),
  624        editor.update(cx, |e, cx| e.display_text(cx)).unwrap()
  625    );
  626    assert_eq!(
  627        cloned_snapshot
  628            .folds_in_range(0..text.len())
  629            .collect::<Vec<_>>(),
  630        snapshot.folds_in_range(0..text.len()).collect::<Vec<_>>(),
  631    );
  632    assert_set_eq!(
  633        cloned_editor
  634            .update(cx, |editor, cx| editor.selections.ranges::<Point>(cx))
  635            .unwrap(),
  636        editor
  637            .update(cx, |editor, cx| editor.selections.ranges(cx))
  638            .unwrap()
  639    );
  640    assert_set_eq!(
  641        cloned_editor
  642            .update(cx, |e, cx| e.selections.display_ranges(cx))
  643            .unwrap(),
  644        editor
  645            .update(cx, |e, cx| e.selections.display_ranges(cx))
  646            .unwrap()
  647    );
  648}
  649
  650#[gpui::test]
  651async fn test_navigation_history(cx: &mut TestAppContext) {
  652    init_test(cx, |_| {});
  653
  654    use workspace::item::Item;
  655
  656    let fs = FakeFs::new(cx.executor());
  657    let project = Project::test(fs, [], cx).await;
  658    let workspace = cx.add_window(|cx| Workspace::test_new(project, cx));
  659    let pane = workspace
  660        .update(cx, |workspace, _| workspace.active_pane().clone())
  661        .unwrap();
  662
  663    _ = workspace.update(cx, |_v, cx| {
  664        cx.new_view(|cx| {
  665            let buffer = MultiBuffer::build_simple(&sample_text(300, 5, 'a'), cx);
  666            let mut editor = build_editor(buffer.clone(), cx);
  667            let handle = cx.view();
  668            editor.set_nav_history(Some(pane.read(cx).nav_history_for_item(handle)));
  669
  670            fn pop_history(editor: &mut Editor, cx: &mut WindowContext) -> Option<NavigationEntry> {
  671                editor.nav_history.as_mut().unwrap().pop_backward(cx)
  672            }
  673
  674            // Move the cursor a small distance.
  675            // Nothing is added to the navigation history.
  676            editor.change_selections(None, cx, |s| {
  677                s.select_display_ranges([
  678                    DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)
  679                ])
  680            });
  681            editor.change_selections(None, cx, |s| {
  682                s.select_display_ranges([
  683                    DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0)
  684                ])
  685            });
  686            assert!(pop_history(&mut editor, cx).is_none());
  687
  688            // Move the cursor a large distance.
  689            // The history can jump back to the previous position.
  690            editor.change_selections(None, cx, |s| {
  691                s.select_display_ranges([
  692                    DisplayPoint::new(DisplayRow(13), 0)..DisplayPoint::new(DisplayRow(13), 3)
  693                ])
  694            });
  695            let nav_entry = pop_history(&mut editor, cx).unwrap();
  696            editor.navigate(nav_entry.data.unwrap(), cx);
  697            assert_eq!(nav_entry.item.id(), cx.entity_id());
  698            assert_eq!(
  699                editor.selections.display_ranges(cx),
  700                &[DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0)]
  701            );
  702            assert!(pop_history(&mut editor, cx).is_none());
  703
  704            // Move the cursor a small distance via the mouse.
  705            // Nothing is added to the navigation history.
  706            editor.begin_selection(DisplayPoint::new(DisplayRow(5), 0), false, 1, cx);
  707            editor.end_selection(cx);
  708            assert_eq!(
  709                editor.selections.display_ranges(cx),
  710                &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 0)]
  711            );
  712            assert!(pop_history(&mut editor, cx).is_none());
  713
  714            // Move the cursor a large distance via the mouse.
  715            // The history can jump back to the previous position.
  716            editor.begin_selection(DisplayPoint::new(DisplayRow(15), 0), false, 1, cx);
  717            editor.end_selection(cx);
  718            assert_eq!(
  719                editor.selections.display_ranges(cx),
  720                &[DisplayPoint::new(DisplayRow(15), 0)..DisplayPoint::new(DisplayRow(15), 0)]
  721            );
  722            let nav_entry = pop_history(&mut editor, cx).unwrap();
  723            editor.navigate(nav_entry.data.unwrap(), cx);
  724            assert_eq!(nav_entry.item.id(), cx.entity_id());
  725            assert_eq!(
  726                editor.selections.display_ranges(cx),
  727                &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 0)]
  728            );
  729            assert!(pop_history(&mut editor, cx).is_none());
  730
  731            // Set scroll position to check later
  732            editor.set_scroll_position(gpui::Point::<f32>::new(5.5, 5.5), cx);
  733            let original_scroll_position = editor.scroll_manager.anchor();
  734
  735            // Jump to the end of the document and adjust scroll
  736            editor.move_to_end(&MoveToEnd, cx);
  737            editor.set_scroll_position(gpui::Point::<f32>::new(-2.5, -0.5), cx);
  738            assert_ne!(editor.scroll_manager.anchor(), original_scroll_position);
  739
  740            let nav_entry = pop_history(&mut editor, cx).unwrap();
  741            editor.navigate(nav_entry.data.unwrap(), cx);
  742            assert_eq!(editor.scroll_manager.anchor(), original_scroll_position);
  743
  744            // Ensure we don't panic when navigation data contains invalid anchors *and* points.
  745            let mut invalid_anchor = editor.scroll_manager.anchor().anchor;
  746            invalid_anchor.text_anchor.buffer_id = BufferId::new(999).ok();
  747            let invalid_point = Point::new(9999, 0);
  748            editor.navigate(
  749                Box::new(NavigationData {
  750                    cursor_anchor: invalid_anchor,
  751                    cursor_position: invalid_point,
  752                    scroll_anchor: ScrollAnchor {
  753                        anchor: invalid_anchor,
  754                        offset: Default::default(),
  755                    },
  756                    scroll_top_row: invalid_point.row,
  757                }),
  758                cx,
  759            );
  760            assert_eq!(
  761                editor.selections.display_ranges(cx),
  762                &[editor.max_point(cx)..editor.max_point(cx)]
  763            );
  764            assert_eq!(
  765                editor.scroll_position(cx),
  766                gpui::Point::new(0., editor.max_point(cx).row().as_f32())
  767            );
  768
  769            editor
  770        })
  771    });
  772}
  773
  774#[gpui::test]
  775fn test_cancel(cx: &mut TestAppContext) {
  776    init_test(cx, |_| {});
  777
  778    let view = cx.add_window(|cx| {
  779        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\ndddddd\n", cx);
  780        build_editor(buffer, cx)
  781    });
  782
  783    _ = view.update(cx, |view, cx| {
  784        view.begin_selection(DisplayPoint::new(DisplayRow(3), 4), false, 1, cx);
  785        view.update_selection(
  786            DisplayPoint::new(DisplayRow(1), 1),
  787            0,
  788            gpui::Point::<f32>::default(),
  789            cx,
  790        );
  791        view.end_selection(cx);
  792
  793        view.begin_selection(DisplayPoint::new(DisplayRow(0), 1), true, 1, cx);
  794        view.update_selection(
  795            DisplayPoint::new(DisplayRow(0), 3),
  796            0,
  797            gpui::Point::<f32>::default(),
  798            cx,
  799        );
  800        view.end_selection(cx);
  801        assert_eq!(
  802            view.selections.display_ranges(cx),
  803            [
  804                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 3),
  805                DisplayPoint::new(DisplayRow(3), 4)..DisplayPoint::new(DisplayRow(1), 1),
  806            ]
  807        );
  808    });
  809
  810    _ = view.update(cx, |view, cx| {
  811        view.cancel(&Cancel, cx);
  812        assert_eq!(
  813            view.selections.display_ranges(cx),
  814            [DisplayPoint::new(DisplayRow(3), 4)..DisplayPoint::new(DisplayRow(1), 1)]
  815        );
  816    });
  817
  818    _ = view.update(cx, |view, cx| {
  819        view.cancel(&Cancel, cx);
  820        assert_eq!(
  821            view.selections.display_ranges(cx),
  822            [DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1)]
  823        );
  824    });
  825}
  826
  827#[gpui::test]
  828fn test_fold_action(cx: &mut TestAppContext) {
  829    init_test(cx, |_| {});
  830
  831    let view = cx.add_window(|cx| {
  832        let buffer = MultiBuffer::build_simple(
  833            &"
  834                impl Foo {
  835                    // Hello!
  836
  837                    fn a() {
  838                        1
  839                    }
  840
  841                    fn b() {
  842                        2
  843                    }
  844
  845                    fn c() {
  846                        3
  847                    }
  848                }
  849            "
  850            .unindent(),
  851            cx,
  852        );
  853        build_editor(buffer.clone(), cx)
  854    });
  855
  856    _ = view.update(cx, |view, cx| {
  857        view.change_selections(None, cx, |s| {
  858            s.select_display_ranges([
  859                DisplayPoint::new(DisplayRow(7), 0)..DisplayPoint::new(DisplayRow(12), 0)
  860            ]);
  861        });
  862        view.fold(&Fold, cx);
  863        assert_eq!(
  864            view.display_text(cx),
  865            "
  866                impl Foo {
  867                    // Hello!
  868
  869                    fn a() {
  870                        1
  871                    }
  872
  873                    fn b() {⋯
  874                    }
  875
  876                    fn c() {⋯
  877                    }
  878                }
  879            "
  880            .unindent(),
  881        );
  882
  883        view.fold(&Fold, cx);
  884        assert_eq!(
  885            view.display_text(cx),
  886            "
  887                impl Foo {⋯
  888                }
  889            "
  890            .unindent(),
  891        );
  892
  893        view.unfold_lines(&UnfoldLines, cx);
  894        assert_eq!(
  895            view.display_text(cx),
  896            "
  897                impl Foo {
  898                    // Hello!
  899
  900                    fn a() {
  901                        1
  902                    }
  903
  904                    fn b() {⋯
  905                    }
  906
  907                    fn c() {⋯
  908                    }
  909                }
  910            "
  911            .unindent(),
  912        );
  913
  914        view.unfold_lines(&UnfoldLines, cx);
  915        assert_eq!(view.display_text(cx), view.buffer.read(cx).read(cx).text());
  916    });
  917}
  918
  919#[gpui::test]
  920fn test_fold_action_whitespace_sensitive_language(cx: &mut TestAppContext) {
  921    init_test(cx, |_| {});
  922
  923    let view = cx.add_window(|cx| {
  924        let buffer = MultiBuffer::build_simple(
  925            &"
  926                class Foo:
  927                    # Hello!
  928
  929                    def a():
  930                        print(1)
  931
  932                    def b():
  933                        print(2)
  934
  935                    def c():
  936                        print(3)
  937            "
  938            .unindent(),
  939            cx,
  940        );
  941        build_editor(buffer.clone(), cx)
  942    });
  943
  944    _ = view.update(cx, |view, cx| {
  945        view.change_selections(None, cx, |s| {
  946            s.select_display_ranges([
  947                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(10), 0)
  948            ]);
  949        });
  950        view.fold(&Fold, cx);
  951        assert_eq!(
  952            view.display_text(cx),
  953            "
  954                class Foo:
  955                    # Hello!
  956
  957                    def a():
  958                        print(1)
  959
  960                    def b():⋯
  961
  962                    def c():⋯
  963            "
  964            .unindent(),
  965        );
  966
  967        view.fold(&Fold, cx);
  968        assert_eq!(
  969            view.display_text(cx),
  970            "
  971                class Foo:⋯
  972            "
  973            .unindent(),
  974        );
  975
  976        view.unfold_lines(&UnfoldLines, cx);
  977        assert_eq!(
  978            view.display_text(cx),
  979            "
  980                class Foo:
  981                    # Hello!
  982
  983                    def a():
  984                        print(1)
  985
  986                    def b():⋯
  987
  988                    def c():⋯
  989            "
  990            .unindent(),
  991        );
  992
  993        view.unfold_lines(&UnfoldLines, cx);
  994        assert_eq!(view.display_text(cx), view.buffer.read(cx).read(cx).text());
  995    });
  996}
  997
  998#[gpui::test]
  999fn test_fold_action_multiple_line_breaks(cx: &mut TestAppContext) {
 1000    init_test(cx, |_| {});
 1001
 1002    let view = cx.add_window(|cx| {
 1003        let buffer = MultiBuffer::build_simple(
 1004            &"
 1005                class Foo:
 1006                    # Hello!
 1007
 1008                    def a():
 1009                        print(1)
 1010
 1011                    def b():
 1012                        print(2)
 1013
 1014
 1015                    def c():
 1016                        print(3)
 1017
 1018
 1019            "
 1020            .unindent(),
 1021            cx,
 1022        );
 1023        build_editor(buffer.clone(), cx)
 1024    });
 1025
 1026    _ = view.update(cx, |view, cx| {
 1027        view.change_selections(None, cx, |s| {
 1028            s.select_display_ranges([
 1029                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(11), 0)
 1030            ]);
 1031        });
 1032        view.fold(&Fold, cx);
 1033        assert_eq!(
 1034            view.display_text(cx),
 1035            "
 1036                class Foo:
 1037                    # Hello!
 1038
 1039                    def a():
 1040                        print(1)
 1041
 1042                    def b():⋯
 1043
 1044
 1045                    def c():⋯
 1046
 1047
 1048            "
 1049            .unindent(),
 1050        );
 1051
 1052        view.fold(&Fold, cx);
 1053        assert_eq!(
 1054            view.display_text(cx),
 1055            "
 1056                class Foo:⋯
 1057
 1058
 1059            "
 1060            .unindent(),
 1061        );
 1062
 1063        view.unfold_lines(&UnfoldLines, cx);
 1064        assert_eq!(
 1065            view.display_text(cx),
 1066            "
 1067                class Foo:
 1068                    # Hello!
 1069
 1070                    def a():
 1071                        print(1)
 1072
 1073                    def b():⋯
 1074
 1075
 1076                    def c():⋯
 1077
 1078
 1079            "
 1080            .unindent(),
 1081        );
 1082
 1083        view.unfold_lines(&UnfoldLines, cx);
 1084        assert_eq!(view.display_text(cx), view.buffer.read(cx).read(cx).text());
 1085    });
 1086}
 1087
 1088#[gpui::test]
 1089fn test_fold_at_level(cx: &mut TestAppContext) {
 1090    init_test(cx, |_| {});
 1091
 1092    let view = cx.add_window(|cx| {
 1093        let buffer = MultiBuffer::build_simple(
 1094            &"
 1095                class Foo:
 1096                    # Hello!
 1097
 1098                    def a():
 1099                        print(1)
 1100
 1101                    def b():
 1102                        print(2)
 1103
 1104
 1105                class Bar:
 1106                    # World!
 1107
 1108                    def a():
 1109                        print(1)
 1110
 1111                    def b():
 1112                        print(2)
 1113
 1114
 1115            "
 1116            .unindent(),
 1117            cx,
 1118        );
 1119        build_editor(buffer.clone(), cx)
 1120    });
 1121
 1122    _ = view.update(cx, |view, cx| {
 1123        view.fold_at_level(&FoldAtLevel { level: 2 }, cx);
 1124        assert_eq!(
 1125            view.display_text(cx),
 1126            "
 1127                class Foo:
 1128                    # Hello!
 1129
 1130                    def a():⋯
 1131
 1132                    def b():⋯
 1133
 1134
 1135                class Bar:
 1136                    # World!
 1137
 1138                    def a():⋯
 1139
 1140                    def b():⋯
 1141
 1142
 1143            "
 1144            .unindent(),
 1145        );
 1146
 1147        view.fold_at_level(&FoldAtLevel { level: 1 }, cx);
 1148        assert_eq!(
 1149            view.display_text(cx),
 1150            "
 1151                class Foo:⋯
 1152
 1153
 1154                class Bar:⋯
 1155
 1156
 1157            "
 1158            .unindent(),
 1159        );
 1160
 1161        view.unfold_all(&UnfoldAll, cx);
 1162        view.fold_at_level(&FoldAtLevel { level: 0 }, cx);
 1163        assert_eq!(
 1164            view.display_text(cx),
 1165            "
 1166                class Foo:
 1167                    # Hello!
 1168
 1169                    def a():
 1170                        print(1)
 1171
 1172                    def b():
 1173                        print(2)
 1174
 1175
 1176                class Bar:
 1177                    # World!
 1178
 1179                    def a():
 1180                        print(1)
 1181
 1182                    def b():
 1183                        print(2)
 1184
 1185
 1186            "
 1187            .unindent(),
 1188        );
 1189
 1190        assert_eq!(view.display_text(cx), view.buffer.read(cx).read(cx).text());
 1191    });
 1192}
 1193
 1194#[gpui::test]
 1195fn test_move_cursor(cx: &mut TestAppContext) {
 1196    init_test(cx, |_| {});
 1197
 1198    let buffer = cx.update(|cx| MultiBuffer::build_simple(&sample_text(6, 6, 'a'), cx));
 1199    let view = cx.add_window(|cx| build_editor(buffer.clone(), cx));
 1200
 1201    buffer.update(cx, |buffer, cx| {
 1202        buffer.edit(
 1203            vec![
 1204                (Point::new(1, 0)..Point::new(1, 0), "\t"),
 1205                (Point::new(1, 1)..Point::new(1, 1), "\t"),
 1206            ],
 1207            None,
 1208            cx,
 1209        );
 1210    });
 1211    _ = view.update(cx, |view, cx| {
 1212        assert_eq!(
 1213            view.selections.display_ranges(cx),
 1214            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1215        );
 1216
 1217        view.move_down(&MoveDown, cx);
 1218        assert_eq!(
 1219            view.selections.display_ranges(cx),
 1220            &[DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)]
 1221        );
 1222
 1223        view.move_right(&MoveRight, cx);
 1224        assert_eq!(
 1225            view.selections.display_ranges(cx),
 1226            &[DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4)]
 1227        );
 1228
 1229        view.move_left(&MoveLeft, cx);
 1230        assert_eq!(
 1231            view.selections.display_ranges(cx),
 1232            &[DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0)]
 1233        );
 1234
 1235        view.move_up(&MoveUp, cx);
 1236        assert_eq!(
 1237            view.selections.display_ranges(cx),
 1238            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1239        );
 1240
 1241        view.move_to_end(&MoveToEnd, cx);
 1242        assert_eq!(
 1243            view.selections.display_ranges(cx),
 1244            &[DisplayPoint::new(DisplayRow(5), 6)..DisplayPoint::new(DisplayRow(5), 6)]
 1245        );
 1246
 1247        view.move_to_beginning(&MoveToBeginning, cx);
 1248        assert_eq!(
 1249            view.selections.display_ranges(cx),
 1250            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 1251        );
 1252
 1253        view.change_selections(None, cx, |s| {
 1254            s.select_display_ranges([
 1255                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 2)
 1256            ]);
 1257        });
 1258        view.select_to_beginning(&SelectToBeginning, cx);
 1259        assert_eq!(
 1260            view.selections.display_ranges(cx),
 1261            &[DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 0)]
 1262        );
 1263
 1264        view.select_to_end(&SelectToEnd, cx);
 1265        assert_eq!(
 1266            view.selections.display_ranges(cx),
 1267            &[DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(5), 6)]
 1268        );
 1269    });
 1270}
 1271
 1272// TODO: Re-enable this test
 1273#[cfg(target_os = "macos")]
 1274#[gpui::test]
 1275fn test_move_cursor_multibyte(cx: &mut TestAppContext) {
 1276    init_test(cx, |_| {});
 1277
 1278    let view = cx.add_window(|cx| {
 1279        let buffer = MultiBuffer::build_simple("ⓐⓑⓒⓓⓔ\nabcde\nαβγδε", cx);
 1280        build_editor(buffer.clone(), cx)
 1281    });
 1282
 1283    assert_eq!('ⓐ'.len_utf8(), 3);
 1284    assert_eq!('α'.len_utf8(), 2);
 1285
 1286    _ = view.update(cx, |view, cx| {
 1287        view.fold_creases(
 1288            vec![
 1289                Crease::simple(Point::new(0, 6)..Point::new(0, 12), FoldPlaceholder::test()),
 1290                Crease::simple(Point::new(1, 2)..Point::new(1, 4), FoldPlaceholder::test()),
 1291                Crease::simple(Point::new(2, 4)..Point::new(2, 8), FoldPlaceholder::test()),
 1292            ],
 1293            true,
 1294            cx,
 1295        );
 1296        assert_eq!(view.display_text(cx), "ⓐⓑ⋯ⓔ\nab⋯e\nαβ⋯ε");
 1297
 1298        view.move_right(&MoveRight, cx);
 1299        assert_eq!(
 1300            view.selections.display_ranges(cx),
 1301            &[empty_range(0, "".len())]
 1302        );
 1303        view.move_right(&MoveRight, cx);
 1304        assert_eq!(
 1305            view.selections.display_ranges(cx),
 1306            &[empty_range(0, "ⓐⓑ".len())]
 1307        );
 1308        view.move_right(&MoveRight, cx);
 1309        assert_eq!(
 1310            view.selections.display_ranges(cx),
 1311            &[empty_range(0, "ⓐⓑ⋯".len())]
 1312        );
 1313
 1314        view.move_down(&MoveDown, cx);
 1315        assert_eq!(
 1316            view.selections.display_ranges(cx),
 1317            &[empty_range(1, "ab⋯e".len())]
 1318        );
 1319        view.move_left(&MoveLeft, cx);
 1320        assert_eq!(
 1321            view.selections.display_ranges(cx),
 1322            &[empty_range(1, "ab⋯".len())]
 1323        );
 1324        view.move_left(&MoveLeft, cx);
 1325        assert_eq!(
 1326            view.selections.display_ranges(cx),
 1327            &[empty_range(1, "ab".len())]
 1328        );
 1329        view.move_left(&MoveLeft, cx);
 1330        assert_eq!(
 1331            view.selections.display_ranges(cx),
 1332            &[empty_range(1, "a".len())]
 1333        );
 1334
 1335        view.move_down(&MoveDown, cx);
 1336        assert_eq!(
 1337            view.selections.display_ranges(cx),
 1338            &[empty_range(2, "α".len())]
 1339        );
 1340        view.move_right(&MoveRight, cx);
 1341        assert_eq!(
 1342            view.selections.display_ranges(cx),
 1343            &[empty_range(2, "αβ".len())]
 1344        );
 1345        view.move_right(&MoveRight, cx);
 1346        assert_eq!(
 1347            view.selections.display_ranges(cx),
 1348            &[empty_range(2, "αβ⋯".len())]
 1349        );
 1350        view.move_right(&MoveRight, cx);
 1351        assert_eq!(
 1352            view.selections.display_ranges(cx),
 1353            &[empty_range(2, "αβ⋯ε".len())]
 1354        );
 1355
 1356        view.move_up(&MoveUp, cx);
 1357        assert_eq!(
 1358            view.selections.display_ranges(cx),
 1359            &[empty_range(1, "ab⋯e".len())]
 1360        );
 1361        view.move_down(&MoveDown, cx);
 1362        assert_eq!(
 1363            view.selections.display_ranges(cx),
 1364            &[empty_range(2, "αβ⋯ε".len())]
 1365        );
 1366        view.move_up(&MoveUp, cx);
 1367        assert_eq!(
 1368            view.selections.display_ranges(cx),
 1369            &[empty_range(1, "ab⋯e".len())]
 1370        );
 1371
 1372        view.move_up(&MoveUp, cx);
 1373        assert_eq!(
 1374            view.selections.display_ranges(cx),
 1375            &[empty_range(0, "ⓐⓑ".len())]
 1376        );
 1377        view.move_left(&MoveLeft, cx);
 1378        assert_eq!(
 1379            view.selections.display_ranges(cx),
 1380            &[empty_range(0, "".len())]
 1381        );
 1382        view.move_left(&MoveLeft, cx);
 1383        assert_eq!(
 1384            view.selections.display_ranges(cx),
 1385            &[empty_range(0, "".len())]
 1386        );
 1387    });
 1388}
 1389
 1390#[gpui::test]
 1391fn test_move_cursor_different_line_lengths(cx: &mut TestAppContext) {
 1392    init_test(cx, |_| {});
 1393
 1394    let view = cx.add_window(|cx| {
 1395        let buffer = MultiBuffer::build_simple("ⓐⓑⓒⓓⓔ\nabcd\nαβγ\nabcd\nⓐⓑⓒⓓⓔ\n", cx);
 1396        build_editor(buffer.clone(), cx)
 1397    });
 1398    _ = view.update(cx, |view, cx| {
 1399        view.change_selections(None, cx, |s| {
 1400            s.select_display_ranges([empty_range(0, "ⓐⓑⓒⓓⓔ".len())]);
 1401        });
 1402
 1403        // moving above start of document should move selection to start of document,
 1404        // but the next move down should still be at the original goal_x
 1405        view.move_up(&MoveUp, cx);
 1406        assert_eq!(
 1407            view.selections.display_ranges(cx),
 1408            &[empty_range(0, "".len())]
 1409        );
 1410
 1411        view.move_down(&MoveDown, cx);
 1412        assert_eq!(
 1413            view.selections.display_ranges(cx),
 1414            &[empty_range(1, "abcd".len())]
 1415        );
 1416
 1417        view.move_down(&MoveDown, cx);
 1418        assert_eq!(
 1419            view.selections.display_ranges(cx),
 1420            &[empty_range(2, "αβγ".len())]
 1421        );
 1422
 1423        view.move_down(&MoveDown, cx);
 1424        assert_eq!(
 1425            view.selections.display_ranges(cx),
 1426            &[empty_range(3, "abcd".len())]
 1427        );
 1428
 1429        view.move_down(&MoveDown, cx);
 1430        assert_eq!(
 1431            view.selections.display_ranges(cx),
 1432            &[empty_range(4, "ⓐⓑⓒⓓⓔ".len())]
 1433        );
 1434
 1435        // moving past end of document should not change goal_x
 1436        view.move_down(&MoveDown, cx);
 1437        assert_eq!(
 1438            view.selections.display_ranges(cx),
 1439            &[empty_range(5, "".len())]
 1440        );
 1441
 1442        view.move_down(&MoveDown, cx);
 1443        assert_eq!(
 1444            view.selections.display_ranges(cx),
 1445            &[empty_range(5, "".len())]
 1446        );
 1447
 1448        view.move_up(&MoveUp, cx);
 1449        assert_eq!(
 1450            view.selections.display_ranges(cx),
 1451            &[empty_range(4, "ⓐⓑⓒⓓⓔ".len())]
 1452        );
 1453
 1454        view.move_up(&MoveUp, cx);
 1455        assert_eq!(
 1456            view.selections.display_ranges(cx),
 1457            &[empty_range(3, "abcd".len())]
 1458        );
 1459
 1460        view.move_up(&MoveUp, cx);
 1461        assert_eq!(
 1462            view.selections.display_ranges(cx),
 1463            &[empty_range(2, "αβγ".len())]
 1464        );
 1465    });
 1466}
 1467
 1468#[gpui::test]
 1469fn test_beginning_end_of_line(cx: &mut TestAppContext) {
 1470    init_test(cx, |_| {});
 1471    let move_to_beg = MoveToBeginningOfLine {
 1472        stop_at_soft_wraps: true,
 1473    };
 1474
 1475    let move_to_end = MoveToEndOfLine {
 1476        stop_at_soft_wraps: true,
 1477    };
 1478
 1479    let view = cx.add_window(|cx| {
 1480        let buffer = MultiBuffer::build_simple("abc\n  def", cx);
 1481        build_editor(buffer, cx)
 1482    });
 1483    _ = view.update(cx, |view, cx| {
 1484        view.change_selections(None, cx, |s| {
 1485            s.select_display_ranges([
 1486                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 1487                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4),
 1488            ]);
 1489        });
 1490    });
 1491
 1492    _ = view.update(cx, |view, cx| {
 1493        view.move_to_beginning_of_line(&move_to_beg, cx);
 1494        assert_eq!(
 1495            view.selections.display_ranges(cx),
 1496            &[
 1497                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1498                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1499            ]
 1500        );
 1501    });
 1502
 1503    _ = view.update(cx, |view, cx| {
 1504        view.move_to_beginning_of_line(&move_to_beg, cx);
 1505        assert_eq!(
 1506            view.selections.display_ranges(cx),
 1507            &[
 1508                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1509                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 1510            ]
 1511        );
 1512    });
 1513
 1514    _ = view.update(cx, |view, cx| {
 1515        view.move_to_beginning_of_line(&move_to_beg, cx);
 1516        assert_eq!(
 1517            view.selections.display_ranges(cx),
 1518            &[
 1519                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1520                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 1521            ]
 1522        );
 1523    });
 1524
 1525    _ = view.update(cx, |view, cx| {
 1526        view.move_to_end_of_line(&move_to_end, cx);
 1527        assert_eq!(
 1528            view.selections.display_ranges(cx),
 1529            &[
 1530                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 1531                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 1532            ]
 1533        );
 1534    });
 1535
 1536    // Moving to the end of line again is a no-op.
 1537    _ = view.update(cx, |view, cx| {
 1538        view.move_to_end_of_line(&move_to_end, cx);
 1539        assert_eq!(
 1540            view.selections.display_ranges(cx),
 1541            &[
 1542                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 1543                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 1544            ]
 1545        );
 1546    });
 1547
 1548    _ = view.update(cx, |view, cx| {
 1549        view.move_left(&MoveLeft, cx);
 1550        view.select_to_beginning_of_line(
 1551            &SelectToBeginningOfLine {
 1552                stop_at_soft_wraps: true,
 1553            },
 1554            cx,
 1555        );
 1556        assert_eq!(
 1557            view.selections.display_ranges(cx),
 1558            &[
 1559                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1560                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 2),
 1561            ]
 1562        );
 1563    });
 1564
 1565    _ = view.update(cx, |view, cx| {
 1566        view.select_to_beginning_of_line(
 1567            &SelectToBeginningOfLine {
 1568                stop_at_soft_wraps: true,
 1569            },
 1570            cx,
 1571        );
 1572        assert_eq!(
 1573            view.selections.display_ranges(cx),
 1574            &[
 1575                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1576                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 0),
 1577            ]
 1578        );
 1579    });
 1580
 1581    _ = view.update(cx, |view, cx| {
 1582        view.select_to_beginning_of_line(
 1583            &SelectToBeginningOfLine {
 1584                stop_at_soft_wraps: true,
 1585            },
 1586            cx,
 1587        );
 1588        assert_eq!(
 1589            view.selections.display_ranges(cx),
 1590            &[
 1591                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 0),
 1592                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 2),
 1593            ]
 1594        );
 1595    });
 1596
 1597    _ = view.update(cx, |view, cx| {
 1598        view.select_to_end_of_line(
 1599            &SelectToEndOfLine {
 1600                stop_at_soft_wraps: true,
 1601            },
 1602            cx,
 1603        );
 1604        assert_eq!(
 1605            view.selections.display_ranges(cx),
 1606            &[
 1607                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 3),
 1608                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 5),
 1609            ]
 1610        );
 1611    });
 1612
 1613    _ = view.update(cx, |view, cx| {
 1614        view.delete_to_end_of_line(&DeleteToEndOfLine, cx);
 1615        assert_eq!(view.display_text(cx), "ab\n  de");
 1616        assert_eq!(
 1617            view.selections.display_ranges(cx),
 1618            &[
 1619                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 1620                DisplayPoint::new(DisplayRow(1), 4)..DisplayPoint::new(DisplayRow(1), 4),
 1621            ]
 1622        );
 1623    });
 1624
 1625    _ = view.update(cx, |view, cx| {
 1626        view.delete_to_beginning_of_line(&DeleteToBeginningOfLine, cx);
 1627        assert_eq!(view.display_text(cx), "\n");
 1628        assert_eq!(
 1629            view.selections.display_ranges(cx),
 1630            &[
 1631                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 1632                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 1633            ]
 1634        );
 1635    });
 1636}
 1637
 1638#[gpui::test]
 1639fn test_beginning_end_of_line_ignore_soft_wrap(cx: &mut TestAppContext) {
 1640    init_test(cx, |_| {});
 1641    let move_to_beg = MoveToBeginningOfLine {
 1642        stop_at_soft_wraps: false,
 1643    };
 1644
 1645    let move_to_end = MoveToEndOfLine {
 1646        stop_at_soft_wraps: false,
 1647    };
 1648
 1649    let view = cx.add_window(|cx| {
 1650        let buffer = MultiBuffer::build_simple("thequickbrownfox\njumpedoverthelazydogs", cx);
 1651        build_editor(buffer, cx)
 1652    });
 1653
 1654    _ = view.update(cx, |view, cx| {
 1655        view.set_wrap_width(Some(140.0.into()), cx);
 1656
 1657        // We expect the following lines after wrapping
 1658        // ```
 1659        // thequickbrownfox
 1660        // jumpedoverthelazydo
 1661        // gs
 1662        // ```
 1663        // The final `gs` was soft-wrapped onto a new line.
 1664        assert_eq!(
 1665            "thequickbrownfox\njumpedoverthelaz\nydogs",
 1666            view.display_text(cx),
 1667        );
 1668
 1669        // First, let's assert behavior on the first line, that was not soft-wrapped.
 1670        // Start the cursor at the `k` on the first line
 1671        view.change_selections(None, cx, |s| {
 1672            s.select_display_ranges([
 1673                DisplayPoint::new(DisplayRow(0), 7)..DisplayPoint::new(DisplayRow(0), 7)
 1674            ]);
 1675        });
 1676
 1677        // Moving to the beginning of the line should put us at the beginning of the line.
 1678        view.move_to_beginning_of_line(&move_to_beg, cx);
 1679        assert_eq!(
 1680            vec![DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),],
 1681            view.selections.display_ranges(cx)
 1682        );
 1683
 1684        // Moving to the end of the line should put us at the end of the line.
 1685        view.move_to_end_of_line(&move_to_end, cx);
 1686        assert_eq!(
 1687            vec![DisplayPoint::new(DisplayRow(0), 16)..DisplayPoint::new(DisplayRow(0), 16),],
 1688            view.selections.display_ranges(cx)
 1689        );
 1690
 1691        // Now, let's assert behavior on the second line, that ended up being soft-wrapped.
 1692        // Start the cursor at the last line (`y` that was wrapped to a new line)
 1693        view.change_selections(None, cx, |s| {
 1694            s.select_display_ranges([
 1695                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 0)
 1696            ]);
 1697        });
 1698
 1699        // Moving to the beginning of the line should put us at the start of the second line of
 1700        // display text, i.e., the `j`.
 1701        view.move_to_beginning_of_line(&move_to_beg, cx);
 1702        assert_eq!(
 1703            vec![DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),],
 1704            view.selections.display_ranges(cx)
 1705        );
 1706
 1707        // Moving to the beginning of the line again should be a no-op.
 1708        view.move_to_beginning_of_line(&move_to_beg, cx);
 1709        assert_eq!(
 1710            vec![DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),],
 1711            view.selections.display_ranges(cx)
 1712        );
 1713
 1714        // Moving to the end of the line should put us right after the `s` that was soft-wrapped to the
 1715        // next display line.
 1716        view.move_to_end_of_line(&move_to_end, cx);
 1717        assert_eq!(
 1718            vec![DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),],
 1719            view.selections.display_ranges(cx)
 1720        );
 1721
 1722        // Moving to the end of the line again should be a no-op.
 1723        view.move_to_end_of_line(&move_to_end, cx);
 1724        assert_eq!(
 1725            vec![DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),],
 1726            view.selections.display_ranges(cx)
 1727        );
 1728    });
 1729}
 1730
 1731#[gpui::test]
 1732fn test_prev_next_word_boundary(cx: &mut TestAppContext) {
 1733    init_test(cx, |_| {});
 1734
 1735    let view = cx.add_window(|cx| {
 1736        let buffer = MultiBuffer::build_simple("use std::str::{foo, bar}\n\n  {baz.qux()}", cx);
 1737        build_editor(buffer, cx)
 1738    });
 1739    _ = view.update(cx, |view, cx| {
 1740        view.change_selections(None, cx, |s| {
 1741            s.select_display_ranges([
 1742                DisplayPoint::new(DisplayRow(0), 11)..DisplayPoint::new(DisplayRow(0), 11),
 1743                DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4),
 1744            ])
 1745        });
 1746
 1747        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1748        assert_selection_ranges("use std::ˇstr::{foo, bar}\n\n  {ˇbaz.qux()}", view, cx);
 1749
 1750        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1751        assert_selection_ranges("use stdˇ::str::{foo, bar}\n\n  ˇ{baz.qux()}", view, cx);
 1752
 1753        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1754        assert_selection_ranges("use ˇstd::str::{foo, bar}\n\nˇ  {baz.qux()}", view, cx);
 1755
 1756        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1757        assert_selection_ranges("ˇuse std::str::{foo, bar}\nˇ\n  {baz.qux()}", view, cx);
 1758
 1759        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1760        assert_selection_ranges("ˇuse std::str::{foo, barˇ}\n\n  {baz.qux()}", view, cx);
 1761
 1762        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1763        assert_selection_ranges("useˇ std::str::{foo, bar}ˇ\n\n  {baz.qux()}", view, cx);
 1764
 1765        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1766        assert_selection_ranges("use stdˇ::str::{foo, bar}\nˇ\n  {baz.qux()}", view, cx);
 1767
 1768        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1769        assert_selection_ranges("use std::ˇstr::{foo, bar}\n\n  {ˇbaz.qux()}", view, cx);
 1770
 1771        view.move_right(&MoveRight, cx);
 1772        view.select_to_previous_word_start(&SelectToPreviousWordStart, cx);
 1773        assert_selection_ranges("use std::«ˇs»tr::{foo, bar}\n\n  {«ˇb»az.qux()}", view, cx);
 1774
 1775        view.select_to_previous_word_start(&SelectToPreviousWordStart, cx);
 1776        assert_selection_ranges("use std«ˇ::s»tr::{foo, bar}\n\n  «ˇ{b»az.qux()}", view, cx);
 1777
 1778        view.select_to_next_word_end(&SelectToNextWordEnd, cx);
 1779        assert_selection_ranges("use std::«ˇs»tr::{foo, bar}\n\n  {«ˇb»az.qux()}", view, cx);
 1780    });
 1781}
 1782
 1783#[gpui::test]
 1784fn test_prev_next_word_bounds_with_soft_wrap(cx: &mut TestAppContext) {
 1785    init_test(cx, |_| {});
 1786
 1787    let view = cx.add_window(|cx| {
 1788        let buffer = MultiBuffer::build_simple("use one::{\n    two::three::four::five\n};", cx);
 1789        build_editor(buffer, cx)
 1790    });
 1791
 1792    _ = view.update(cx, |view, cx| {
 1793        view.set_wrap_width(Some(140.0.into()), cx);
 1794        assert_eq!(
 1795            view.display_text(cx),
 1796            "use one::{\n    two::three::\n    four::five\n};"
 1797        );
 1798
 1799        view.change_selections(None, cx, |s| {
 1800            s.select_display_ranges([
 1801                DisplayPoint::new(DisplayRow(1), 7)..DisplayPoint::new(DisplayRow(1), 7)
 1802            ]);
 1803        });
 1804
 1805        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1806        assert_eq!(
 1807            view.selections.display_ranges(cx),
 1808            &[DisplayPoint::new(DisplayRow(1), 9)..DisplayPoint::new(DisplayRow(1), 9)]
 1809        );
 1810
 1811        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1812        assert_eq!(
 1813            view.selections.display_ranges(cx),
 1814            &[DisplayPoint::new(DisplayRow(1), 14)..DisplayPoint::new(DisplayRow(1), 14)]
 1815        );
 1816
 1817        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1818        assert_eq!(
 1819            view.selections.display_ranges(cx),
 1820            &[DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4)]
 1821        );
 1822
 1823        view.move_to_next_word_end(&MoveToNextWordEnd, cx);
 1824        assert_eq!(
 1825            view.selections.display_ranges(cx),
 1826            &[DisplayPoint::new(DisplayRow(2), 8)..DisplayPoint::new(DisplayRow(2), 8)]
 1827        );
 1828
 1829        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1830        assert_eq!(
 1831            view.selections.display_ranges(cx),
 1832            &[DisplayPoint::new(DisplayRow(2), 4)..DisplayPoint::new(DisplayRow(2), 4)]
 1833        );
 1834
 1835        view.move_to_previous_word_start(&MoveToPreviousWordStart, cx);
 1836        assert_eq!(
 1837            view.selections.display_ranges(cx),
 1838            &[DisplayPoint::new(DisplayRow(1), 14)..DisplayPoint::new(DisplayRow(1), 14)]
 1839        );
 1840    });
 1841}
 1842
 1843#[gpui::test]
 1844async fn test_move_start_of_paragraph_end_of_paragraph(cx: &mut gpui::TestAppContext) {
 1845    init_test(cx, |_| {});
 1846    let mut cx = EditorTestContext::new(cx).await;
 1847
 1848    let line_height = cx.editor(|editor, cx| {
 1849        editor
 1850            .style()
 1851            .unwrap()
 1852            .text
 1853            .line_height_in_pixels(cx.rem_size())
 1854    });
 1855    cx.simulate_window_resize(cx.window, size(px(100.), 4. * line_height));
 1856
 1857    cx.set_state(
 1858        &r#"ˇone
 1859        two
 1860
 1861        three
 1862        fourˇ
 1863        five
 1864
 1865        six"#
 1866            .unindent(),
 1867    );
 1868
 1869    cx.update_editor(|editor, cx| editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, cx));
 1870    cx.assert_editor_state(
 1871        &r#"one
 1872        two
 1873        ˇ
 1874        three
 1875        four
 1876        five
 1877        ˇ
 1878        six"#
 1879            .unindent(),
 1880    );
 1881
 1882    cx.update_editor(|editor, cx| editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, cx));
 1883    cx.assert_editor_state(
 1884        &r#"one
 1885        two
 1886
 1887        three
 1888        four
 1889        five
 1890        ˇ
 1891        sixˇ"#
 1892            .unindent(),
 1893    );
 1894
 1895    cx.update_editor(|editor, cx| editor.move_to_end_of_paragraph(&MoveToEndOfParagraph, cx));
 1896    cx.assert_editor_state(
 1897        &r#"one
 1898        two
 1899
 1900        three
 1901        four
 1902        five
 1903
 1904        sixˇ"#
 1905            .unindent(),
 1906    );
 1907
 1908    cx.update_editor(|editor, cx| editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, cx));
 1909    cx.assert_editor_state(
 1910        &r#"one
 1911        two
 1912
 1913        three
 1914        four
 1915        five
 1916        ˇ
 1917        six"#
 1918            .unindent(),
 1919    );
 1920
 1921    cx.update_editor(|editor, cx| editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, cx));
 1922    cx.assert_editor_state(
 1923        &r#"one
 1924        two
 1925        ˇ
 1926        three
 1927        four
 1928        five
 1929
 1930        six"#
 1931            .unindent(),
 1932    );
 1933
 1934    cx.update_editor(|editor, cx| editor.move_to_start_of_paragraph(&MoveToStartOfParagraph, cx));
 1935    cx.assert_editor_state(
 1936        &r#"ˇone
 1937        two
 1938
 1939        three
 1940        four
 1941        five
 1942
 1943        six"#
 1944            .unindent(),
 1945    );
 1946}
 1947
 1948#[gpui::test]
 1949async fn test_scroll_page_up_page_down(cx: &mut gpui::TestAppContext) {
 1950    init_test(cx, |_| {});
 1951    let mut cx = EditorTestContext::new(cx).await;
 1952    let line_height = cx.editor(|editor, cx| {
 1953        editor
 1954            .style()
 1955            .unwrap()
 1956            .text
 1957            .line_height_in_pixels(cx.rem_size())
 1958    });
 1959    let window = cx.window;
 1960    cx.simulate_window_resize(window, size(px(1000.), 4. * line_height + px(0.5)));
 1961
 1962    cx.set_state(
 1963        r#"ˇone
 1964        two
 1965        three
 1966        four
 1967        five
 1968        six
 1969        seven
 1970        eight
 1971        nine
 1972        ten
 1973        "#,
 1974    );
 1975
 1976    cx.update_editor(|editor, cx| {
 1977        assert_eq!(
 1978            editor.snapshot(cx).scroll_position(),
 1979            gpui::Point::new(0., 0.)
 1980        );
 1981        editor.scroll_screen(&ScrollAmount::Page(1.), cx);
 1982        assert_eq!(
 1983            editor.snapshot(cx).scroll_position(),
 1984            gpui::Point::new(0., 3.)
 1985        );
 1986        editor.scroll_screen(&ScrollAmount::Page(1.), cx);
 1987        assert_eq!(
 1988            editor.snapshot(cx).scroll_position(),
 1989            gpui::Point::new(0., 6.)
 1990        );
 1991        editor.scroll_screen(&ScrollAmount::Page(-1.), cx);
 1992        assert_eq!(
 1993            editor.snapshot(cx).scroll_position(),
 1994            gpui::Point::new(0., 3.)
 1995        );
 1996
 1997        editor.scroll_screen(&ScrollAmount::Page(-0.5), cx);
 1998        assert_eq!(
 1999            editor.snapshot(cx).scroll_position(),
 2000            gpui::Point::new(0., 1.)
 2001        );
 2002        editor.scroll_screen(&ScrollAmount::Page(0.5), cx);
 2003        assert_eq!(
 2004            editor.snapshot(cx).scroll_position(),
 2005            gpui::Point::new(0., 3.)
 2006        );
 2007    });
 2008}
 2009
 2010#[gpui::test]
 2011async fn test_autoscroll(cx: &mut gpui::TestAppContext) {
 2012    init_test(cx, |_| {});
 2013    let mut cx = EditorTestContext::new(cx).await;
 2014
 2015    let line_height = cx.update_editor(|editor, cx| {
 2016        editor.set_vertical_scroll_margin(2, cx);
 2017        editor
 2018            .style()
 2019            .unwrap()
 2020            .text
 2021            .line_height_in_pixels(cx.rem_size())
 2022    });
 2023    let window = cx.window;
 2024    cx.simulate_window_resize(window, size(px(1000.), 6. * line_height));
 2025
 2026    cx.set_state(
 2027        r#"ˇone
 2028            two
 2029            three
 2030            four
 2031            five
 2032            six
 2033            seven
 2034            eight
 2035            nine
 2036            ten
 2037        "#,
 2038    );
 2039    cx.update_editor(|editor, cx| {
 2040        assert_eq!(
 2041            editor.snapshot(cx).scroll_position(),
 2042            gpui::Point::new(0., 0.0)
 2043        );
 2044    });
 2045
 2046    // Add a cursor below the visible area. Since both cursors cannot fit
 2047    // on screen, the editor autoscrolls to reveal the newest cursor, and
 2048    // allows the vertical scroll margin below that cursor.
 2049    cx.update_editor(|editor, cx| {
 2050        editor.change_selections(Some(Autoscroll::fit()), cx, |selections| {
 2051            selections.select_ranges([
 2052                Point::new(0, 0)..Point::new(0, 0),
 2053                Point::new(6, 0)..Point::new(6, 0),
 2054            ]);
 2055        })
 2056    });
 2057    cx.update_editor(|editor, cx| {
 2058        assert_eq!(
 2059            editor.snapshot(cx).scroll_position(),
 2060            gpui::Point::new(0., 3.0)
 2061        );
 2062    });
 2063
 2064    // Move down. The editor cursor scrolls down to track the newest cursor.
 2065    cx.update_editor(|editor, cx| {
 2066        editor.move_down(&Default::default(), cx);
 2067    });
 2068    cx.update_editor(|editor, cx| {
 2069        assert_eq!(
 2070            editor.snapshot(cx).scroll_position(),
 2071            gpui::Point::new(0., 4.0)
 2072        );
 2073    });
 2074
 2075    // Add a cursor above the visible area. Since both cursors fit on screen,
 2076    // the editor scrolls to show both.
 2077    cx.update_editor(|editor, cx| {
 2078        editor.change_selections(Some(Autoscroll::fit()), cx, |selections| {
 2079            selections.select_ranges([
 2080                Point::new(1, 0)..Point::new(1, 0),
 2081                Point::new(6, 0)..Point::new(6, 0),
 2082            ]);
 2083        })
 2084    });
 2085    cx.update_editor(|editor, cx| {
 2086        assert_eq!(
 2087            editor.snapshot(cx).scroll_position(),
 2088            gpui::Point::new(0., 1.0)
 2089        );
 2090    });
 2091}
 2092
 2093#[gpui::test]
 2094async fn test_move_page_up_page_down(cx: &mut gpui::TestAppContext) {
 2095    init_test(cx, |_| {});
 2096    let mut cx = EditorTestContext::new(cx).await;
 2097
 2098    let line_height = cx.editor(|editor, cx| {
 2099        editor
 2100            .style()
 2101            .unwrap()
 2102            .text
 2103            .line_height_in_pixels(cx.rem_size())
 2104    });
 2105    let window = cx.window;
 2106    cx.simulate_window_resize(window, size(px(100.), 4. * line_height));
 2107    cx.set_state(
 2108        &r#"
 2109        ˇone
 2110        two
 2111        threeˇ
 2112        four
 2113        five
 2114        six
 2115        seven
 2116        eight
 2117        nine
 2118        ten
 2119        "#
 2120        .unindent(),
 2121    );
 2122
 2123    cx.update_editor(|editor, cx| editor.move_page_down(&MovePageDown::default(), cx));
 2124    cx.assert_editor_state(
 2125        &r#"
 2126        one
 2127        two
 2128        three
 2129        ˇfour
 2130        five
 2131        sixˇ
 2132        seven
 2133        eight
 2134        nine
 2135        ten
 2136        "#
 2137        .unindent(),
 2138    );
 2139
 2140    cx.update_editor(|editor, cx| editor.move_page_down(&MovePageDown::default(), cx));
 2141    cx.assert_editor_state(
 2142        &r#"
 2143        one
 2144        two
 2145        three
 2146        four
 2147        five
 2148        six
 2149        ˇseven
 2150        eight
 2151        nineˇ
 2152        ten
 2153        "#
 2154        .unindent(),
 2155    );
 2156
 2157    cx.update_editor(|editor, cx| editor.move_page_up(&MovePageUp::default(), cx));
 2158    cx.assert_editor_state(
 2159        &r#"
 2160        one
 2161        two
 2162        three
 2163        ˇfour
 2164        five
 2165        sixˇ
 2166        seven
 2167        eight
 2168        nine
 2169        ten
 2170        "#
 2171        .unindent(),
 2172    );
 2173
 2174    cx.update_editor(|editor, cx| editor.move_page_up(&MovePageUp::default(), cx));
 2175    cx.assert_editor_state(
 2176        &r#"
 2177        ˇone
 2178        two
 2179        threeˇ
 2180        four
 2181        five
 2182        six
 2183        seven
 2184        eight
 2185        nine
 2186        ten
 2187        "#
 2188        .unindent(),
 2189    );
 2190
 2191    // Test select collapsing
 2192    cx.update_editor(|editor, cx| {
 2193        editor.move_page_down(&MovePageDown::default(), cx);
 2194        editor.move_page_down(&MovePageDown::default(), cx);
 2195        editor.move_page_down(&MovePageDown::default(), cx);
 2196    });
 2197    cx.assert_editor_state(
 2198        &r#"
 2199        one
 2200        two
 2201        three
 2202        four
 2203        five
 2204        six
 2205        seven
 2206        eight
 2207        nine
 2208        ˇten
 2209        ˇ"#
 2210        .unindent(),
 2211    );
 2212}
 2213
 2214#[gpui::test]
 2215async fn test_delete_to_beginning_of_line(cx: &mut gpui::TestAppContext) {
 2216    init_test(cx, |_| {});
 2217    let mut cx = EditorTestContext::new(cx).await;
 2218    cx.set_state("one «two threeˇ» four");
 2219    cx.update_editor(|editor, cx| {
 2220        editor.delete_to_beginning_of_line(&DeleteToBeginningOfLine, cx);
 2221        assert_eq!(editor.text(cx), " four");
 2222    });
 2223}
 2224
 2225#[gpui::test]
 2226fn test_delete_to_word_boundary(cx: &mut TestAppContext) {
 2227    init_test(cx, |_| {});
 2228
 2229    let view = cx.add_window(|cx| {
 2230        let buffer = MultiBuffer::build_simple("one two three four", cx);
 2231        build_editor(buffer.clone(), cx)
 2232    });
 2233
 2234    _ = view.update(cx, |view, cx| {
 2235        view.change_selections(None, cx, |s| {
 2236            s.select_display_ranges([
 2237                // an empty selection - the preceding word fragment is deleted
 2238                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 2239                // characters selected - they are deleted
 2240                DisplayPoint::new(DisplayRow(0), 9)..DisplayPoint::new(DisplayRow(0), 12),
 2241            ])
 2242        });
 2243        view.delete_to_previous_word_start(
 2244            &DeleteToPreviousWordStart {
 2245                ignore_newlines: false,
 2246            },
 2247            cx,
 2248        );
 2249        assert_eq!(view.buffer.read(cx).read(cx).text(), "e two te four");
 2250    });
 2251
 2252    _ = view.update(cx, |view, cx| {
 2253        view.change_selections(None, cx, |s| {
 2254            s.select_display_ranges([
 2255                // an empty selection - the following word fragment is deleted
 2256                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 3),
 2257                // characters selected - they are deleted
 2258                DisplayPoint::new(DisplayRow(0), 9)..DisplayPoint::new(DisplayRow(0), 10),
 2259            ])
 2260        });
 2261        view.delete_to_next_word_end(
 2262            &DeleteToNextWordEnd {
 2263                ignore_newlines: false,
 2264            },
 2265            cx,
 2266        );
 2267        assert_eq!(view.buffer.read(cx).read(cx).text(), "e t te our");
 2268    });
 2269}
 2270
 2271#[gpui::test]
 2272fn test_delete_to_previous_word_start_or_newline(cx: &mut TestAppContext) {
 2273    init_test(cx, |_| {});
 2274
 2275    let view = cx.add_window(|cx| {
 2276        let buffer = MultiBuffer::build_simple("one\n2\nthree\n4", cx);
 2277        build_editor(buffer.clone(), cx)
 2278    });
 2279    let del_to_prev_word_start = DeleteToPreviousWordStart {
 2280        ignore_newlines: false,
 2281    };
 2282    let del_to_prev_word_start_ignore_newlines = DeleteToPreviousWordStart {
 2283        ignore_newlines: true,
 2284    };
 2285
 2286    _ = view.update(cx, |view, cx| {
 2287        view.change_selections(None, cx, |s| {
 2288            s.select_display_ranges([
 2289                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1)
 2290            ])
 2291        });
 2292        view.delete_to_previous_word_start(&del_to_prev_word_start, cx);
 2293        assert_eq!(view.buffer.read(cx).read(cx).text(), "one\n2\nthree\n");
 2294        view.delete_to_previous_word_start(&del_to_prev_word_start, cx);
 2295        assert_eq!(view.buffer.read(cx).read(cx).text(), "one\n2\nthree");
 2296        view.delete_to_previous_word_start(&del_to_prev_word_start, cx);
 2297        assert_eq!(view.buffer.read(cx).read(cx).text(), "one\n2\n");
 2298        view.delete_to_previous_word_start(&del_to_prev_word_start, cx);
 2299        assert_eq!(view.buffer.read(cx).read(cx).text(), "one\n2");
 2300        view.delete_to_previous_word_start(&del_to_prev_word_start_ignore_newlines, cx);
 2301        assert_eq!(view.buffer.read(cx).read(cx).text(), "one\n");
 2302        view.delete_to_previous_word_start(&del_to_prev_word_start_ignore_newlines, cx);
 2303        assert_eq!(view.buffer.read(cx).read(cx).text(), "");
 2304    });
 2305}
 2306
 2307#[gpui::test]
 2308fn test_delete_to_next_word_end_or_newline(cx: &mut TestAppContext) {
 2309    init_test(cx, |_| {});
 2310
 2311    let view = cx.add_window(|cx| {
 2312        let buffer = MultiBuffer::build_simple("\none\n   two\nthree\n   four", cx);
 2313        build_editor(buffer.clone(), cx)
 2314    });
 2315    let del_to_next_word_end = DeleteToNextWordEnd {
 2316        ignore_newlines: false,
 2317    };
 2318    let del_to_next_word_end_ignore_newlines = DeleteToNextWordEnd {
 2319        ignore_newlines: true,
 2320    };
 2321
 2322    _ = view.update(cx, |view, cx| {
 2323        view.change_selections(None, cx, |s| {
 2324            s.select_display_ranges([
 2325                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0)
 2326            ])
 2327        });
 2328        view.delete_to_next_word_end(&del_to_next_word_end, cx);
 2329        assert_eq!(
 2330            view.buffer.read(cx).read(cx).text(),
 2331            "one\n   two\nthree\n   four"
 2332        );
 2333        view.delete_to_next_word_end(&del_to_next_word_end, cx);
 2334        assert_eq!(
 2335            view.buffer.read(cx).read(cx).text(),
 2336            "\n   two\nthree\n   four"
 2337        );
 2338        view.delete_to_next_word_end(&del_to_next_word_end, cx);
 2339        assert_eq!(view.buffer.read(cx).read(cx).text(), "two\nthree\n   four");
 2340        view.delete_to_next_word_end(&del_to_next_word_end, cx);
 2341        assert_eq!(view.buffer.read(cx).read(cx).text(), "\nthree\n   four");
 2342        view.delete_to_next_word_end(&del_to_next_word_end_ignore_newlines, cx);
 2343        assert_eq!(view.buffer.read(cx).read(cx).text(), "\n   four");
 2344        view.delete_to_next_word_end(&del_to_next_word_end_ignore_newlines, cx);
 2345        assert_eq!(view.buffer.read(cx).read(cx).text(), "");
 2346    });
 2347}
 2348
 2349#[gpui::test]
 2350fn test_newline(cx: &mut TestAppContext) {
 2351    init_test(cx, |_| {});
 2352
 2353    let view = cx.add_window(|cx| {
 2354        let buffer = MultiBuffer::build_simple("aaaa\n    bbbb\n", cx);
 2355        build_editor(buffer.clone(), cx)
 2356    });
 2357
 2358    _ = view.update(cx, |view, cx| {
 2359        view.change_selections(None, cx, |s| {
 2360            s.select_display_ranges([
 2361                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 2362                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 2363                DisplayPoint::new(DisplayRow(1), 6)..DisplayPoint::new(DisplayRow(1), 6),
 2364            ])
 2365        });
 2366
 2367        view.newline(&Newline, cx);
 2368        assert_eq!(view.text(cx), "aa\naa\n  \n    bb\n    bb\n");
 2369    });
 2370}
 2371
 2372#[gpui::test]
 2373fn test_newline_with_old_selections(cx: &mut TestAppContext) {
 2374    init_test(cx, |_| {});
 2375
 2376    let editor = cx.add_window(|cx| {
 2377        let buffer = MultiBuffer::build_simple(
 2378            "
 2379                a
 2380                b(
 2381                    X
 2382                )
 2383                c(
 2384                    X
 2385                )
 2386            "
 2387            .unindent()
 2388            .as_str(),
 2389            cx,
 2390        );
 2391        let mut editor = build_editor(buffer.clone(), cx);
 2392        editor.change_selections(None, cx, |s| {
 2393            s.select_ranges([
 2394                Point::new(2, 4)..Point::new(2, 5),
 2395                Point::new(5, 4)..Point::new(5, 5),
 2396            ])
 2397        });
 2398        editor
 2399    });
 2400
 2401    _ = editor.update(cx, |editor, cx| {
 2402        // Edit the buffer directly, deleting ranges surrounding the editor's selections
 2403        editor.buffer.update(cx, |buffer, cx| {
 2404            buffer.edit(
 2405                [
 2406                    (Point::new(1, 2)..Point::new(3, 0), ""),
 2407                    (Point::new(4, 2)..Point::new(6, 0), ""),
 2408                ],
 2409                None,
 2410                cx,
 2411            );
 2412            assert_eq!(
 2413                buffer.read(cx).text(),
 2414                "
 2415                    a
 2416                    b()
 2417                    c()
 2418                "
 2419                .unindent()
 2420            );
 2421        });
 2422        assert_eq!(
 2423            editor.selections.ranges(cx),
 2424            &[
 2425                Point::new(1, 2)..Point::new(1, 2),
 2426                Point::new(2, 2)..Point::new(2, 2),
 2427            ],
 2428        );
 2429
 2430        editor.newline(&Newline, cx);
 2431        assert_eq!(
 2432            editor.text(cx),
 2433            "
 2434                a
 2435                b(
 2436                )
 2437                c(
 2438                )
 2439            "
 2440            .unindent()
 2441        );
 2442
 2443        // The selections are moved after the inserted newlines
 2444        assert_eq!(
 2445            editor.selections.ranges(cx),
 2446            &[
 2447                Point::new(2, 0)..Point::new(2, 0),
 2448                Point::new(4, 0)..Point::new(4, 0),
 2449            ],
 2450        );
 2451    });
 2452}
 2453
 2454#[gpui::test]
 2455async fn test_newline_above(cx: &mut gpui::TestAppContext) {
 2456    init_test(cx, |settings| {
 2457        settings.defaults.tab_size = NonZeroU32::new(4)
 2458    });
 2459
 2460    let language = Arc::new(
 2461        Language::new(
 2462            LanguageConfig::default(),
 2463            Some(tree_sitter_rust::LANGUAGE.into()),
 2464        )
 2465        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2466        .unwrap(),
 2467    );
 2468
 2469    let mut cx = EditorTestContext::new(cx).await;
 2470    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2471    cx.set_state(indoc! {"
 2472        const a: ˇA = (
 2473 2474                «const_functionˇ»(ˇ),
 2475                so«mˇ»et«hˇ»ing_ˇelse,ˇ
 2476 2477        ˇ);ˇ
 2478    "});
 2479
 2480    cx.update_editor(|e, cx| e.newline_above(&NewlineAbove, cx));
 2481    cx.assert_editor_state(indoc! {"
 2482        ˇ
 2483        const a: A = (
 2484            ˇ
 2485            (
 2486                ˇ
 2487                ˇ
 2488                const_function(),
 2489                ˇ
 2490                ˇ
 2491                ˇ
 2492                ˇ
 2493                something_else,
 2494                ˇ
 2495            )
 2496            ˇ
 2497            ˇ
 2498        );
 2499    "});
 2500}
 2501
 2502#[gpui::test]
 2503async fn test_newline_below(cx: &mut gpui::TestAppContext) {
 2504    init_test(cx, |settings| {
 2505        settings.defaults.tab_size = NonZeroU32::new(4)
 2506    });
 2507
 2508    let language = Arc::new(
 2509        Language::new(
 2510            LanguageConfig::default(),
 2511            Some(tree_sitter_rust::LANGUAGE.into()),
 2512        )
 2513        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2514        .unwrap(),
 2515    );
 2516
 2517    let mut cx = EditorTestContext::new(cx).await;
 2518    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2519    cx.set_state(indoc! {"
 2520        const a: ˇA = (
 2521 2522                «const_functionˇ»(ˇ),
 2523                so«mˇ»et«hˇ»ing_ˇelse,ˇ
 2524 2525        ˇ);ˇ
 2526    "});
 2527
 2528    cx.update_editor(|e, cx| e.newline_below(&NewlineBelow, cx));
 2529    cx.assert_editor_state(indoc! {"
 2530        const a: A = (
 2531            ˇ
 2532            (
 2533                ˇ
 2534                const_function(),
 2535                ˇ
 2536                ˇ
 2537                something_else,
 2538                ˇ
 2539                ˇ
 2540                ˇ
 2541                ˇ
 2542            )
 2543            ˇ
 2544        );
 2545        ˇ
 2546        ˇ
 2547    "});
 2548}
 2549
 2550#[gpui::test]
 2551async fn test_newline_comments(cx: &mut gpui::TestAppContext) {
 2552    init_test(cx, |settings| {
 2553        settings.defaults.tab_size = NonZeroU32::new(4)
 2554    });
 2555
 2556    let language = Arc::new(Language::new(
 2557        LanguageConfig {
 2558            line_comments: vec!["//".into()],
 2559            ..LanguageConfig::default()
 2560        },
 2561        None,
 2562    ));
 2563    {
 2564        let mut cx = EditorTestContext::new(cx).await;
 2565        cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2566        cx.set_state(indoc! {"
 2567        // Fooˇ
 2568    "});
 2569
 2570        cx.update_editor(|e, cx| e.newline(&Newline, cx));
 2571        cx.assert_editor_state(indoc! {"
 2572        // Foo
 2573        //ˇ
 2574    "});
 2575        // Ensure that if cursor is before the comment start, we do not actually insert a comment prefix.
 2576        cx.set_state(indoc! {"
 2577        ˇ// Foo
 2578    "});
 2579        cx.update_editor(|e, cx| e.newline(&Newline, cx));
 2580        cx.assert_editor_state(indoc! {"
 2581
 2582        ˇ// Foo
 2583    "});
 2584    }
 2585    // Ensure that comment continuations can be disabled.
 2586    update_test_language_settings(cx, |settings| {
 2587        settings.defaults.extend_comment_on_newline = Some(false);
 2588    });
 2589    let mut cx = EditorTestContext::new(cx).await;
 2590    cx.set_state(indoc! {"
 2591        // Fooˇ
 2592    "});
 2593    cx.update_editor(|e, cx| e.newline(&Newline, cx));
 2594    cx.assert_editor_state(indoc! {"
 2595        // Foo
 2596        ˇ
 2597    "});
 2598}
 2599
 2600#[gpui::test]
 2601fn test_insert_with_old_selections(cx: &mut TestAppContext) {
 2602    init_test(cx, |_| {});
 2603
 2604    let editor = cx.add_window(|cx| {
 2605        let buffer = MultiBuffer::build_simple("a( X ), b( Y ), c( Z )", cx);
 2606        let mut editor = build_editor(buffer.clone(), cx);
 2607        editor.change_selections(None, cx, |s| s.select_ranges([3..4, 11..12, 19..20]));
 2608        editor
 2609    });
 2610
 2611    _ = editor.update(cx, |editor, cx| {
 2612        // Edit the buffer directly, deleting ranges surrounding the editor's selections
 2613        editor.buffer.update(cx, |buffer, cx| {
 2614            buffer.edit([(2..5, ""), (10..13, ""), (18..21, "")], None, cx);
 2615            assert_eq!(buffer.read(cx).text(), "a(), b(), c()".unindent());
 2616        });
 2617        assert_eq!(editor.selections.ranges(cx), &[2..2, 7..7, 12..12],);
 2618
 2619        editor.insert("Z", cx);
 2620        assert_eq!(editor.text(cx), "a(Z), b(Z), c(Z)");
 2621
 2622        // The selections are moved after the inserted characters
 2623        assert_eq!(editor.selections.ranges(cx), &[3..3, 9..9, 15..15],);
 2624    });
 2625}
 2626
 2627#[gpui::test]
 2628async fn test_tab(cx: &mut gpui::TestAppContext) {
 2629    init_test(cx, |settings| {
 2630        settings.defaults.tab_size = NonZeroU32::new(3)
 2631    });
 2632
 2633    let mut cx = EditorTestContext::new(cx).await;
 2634    cx.set_state(indoc! {"
 2635        ˇabˇc
 2636        ˇ🏀ˇ🏀ˇefg
 2637 2638    "});
 2639    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2640    cx.assert_editor_state(indoc! {"
 2641           ˇab ˇc
 2642           ˇ🏀  ˇ🏀  ˇefg
 2643        d  ˇ
 2644    "});
 2645
 2646    cx.set_state(indoc! {"
 2647        a
 2648        «🏀ˇ»🏀«🏀ˇ»🏀«🏀ˇ»
 2649    "});
 2650    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2651    cx.assert_editor_state(indoc! {"
 2652        a
 2653           «🏀ˇ»🏀«🏀ˇ»🏀«🏀ˇ»
 2654    "});
 2655}
 2656
 2657#[gpui::test]
 2658async fn test_tab_in_leading_whitespace_auto_indents_lines(cx: &mut gpui::TestAppContext) {
 2659    init_test(cx, |_| {});
 2660
 2661    let mut cx = EditorTestContext::new(cx).await;
 2662    let language = Arc::new(
 2663        Language::new(
 2664            LanguageConfig::default(),
 2665            Some(tree_sitter_rust::LANGUAGE.into()),
 2666        )
 2667        .with_indents_query(r#"(_ "(" ")" @end) @indent"#)
 2668        .unwrap(),
 2669    );
 2670    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2671
 2672    // cursors that are already at the suggested indent level insert
 2673    // a soft tab. cursors that are to the left of the suggested indent
 2674    // auto-indent their line.
 2675    cx.set_state(indoc! {"
 2676        ˇ
 2677        const a: B = (
 2678            c(
 2679                d(
 2680        ˇ
 2681                )
 2682        ˇ
 2683        ˇ    )
 2684        );
 2685    "});
 2686    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2687    cx.assert_editor_state(indoc! {"
 2688            ˇ
 2689        const a: B = (
 2690            c(
 2691                d(
 2692                    ˇ
 2693                )
 2694                ˇ
 2695            ˇ)
 2696        );
 2697    "});
 2698
 2699    // handle auto-indent when there are multiple cursors on the same line
 2700    cx.set_state(indoc! {"
 2701        const a: B = (
 2702            c(
 2703        ˇ    ˇ
 2704        ˇ    )
 2705        );
 2706    "});
 2707    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2708    cx.assert_editor_state(indoc! {"
 2709        const a: B = (
 2710            c(
 2711                ˇ
 2712            ˇ)
 2713        );
 2714    "});
 2715}
 2716
 2717#[gpui::test]
 2718async fn test_tab_with_mixed_whitespace(cx: &mut gpui::TestAppContext) {
 2719    init_test(cx, |settings| {
 2720        settings.defaults.tab_size = NonZeroU32::new(4)
 2721    });
 2722
 2723    let language = Arc::new(
 2724        Language::new(
 2725            LanguageConfig::default(),
 2726            Some(tree_sitter_rust::LANGUAGE.into()),
 2727        )
 2728        .with_indents_query(r#"(_ "{" "}" @end) @indent"#)
 2729        .unwrap(),
 2730    );
 2731
 2732    let mut cx = EditorTestContext::new(cx).await;
 2733    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 2734    cx.set_state(indoc! {"
 2735        fn a() {
 2736            if b {
 2737        \t ˇc
 2738            }
 2739        }
 2740    "});
 2741
 2742    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2743    cx.assert_editor_state(indoc! {"
 2744        fn a() {
 2745            if b {
 2746                ˇc
 2747            }
 2748        }
 2749    "});
 2750}
 2751
 2752#[gpui::test]
 2753async fn test_indent_outdent(cx: &mut gpui::TestAppContext) {
 2754    init_test(cx, |settings| {
 2755        settings.defaults.tab_size = NonZeroU32::new(4);
 2756    });
 2757
 2758    let mut cx = EditorTestContext::new(cx).await;
 2759
 2760    cx.set_state(indoc! {"
 2761          «oneˇ» «twoˇ»
 2762        three
 2763         four
 2764    "});
 2765    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2766    cx.assert_editor_state(indoc! {"
 2767            «oneˇ» «twoˇ»
 2768        three
 2769         four
 2770    "});
 2771
 2772    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2773    cx.assert_editor_state(indoc! {"
 2774        «oneˇ» «twoˇ»
 2775        three
 2776         four
 2777    "});
 2778
 2779    // select across line ending
 2780    cx.set_state(indoc! {"
 2781        one two
 2782        t«hree
 2783        ˇ» four
 2784    "});
 2785    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2786    cx.assert_editor_state(indoc! {"
 2787        one two
 2788            t«hree
 2789        ˇ» four
 2790    "});
 2791
 2792    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2793    cx.assert_editor_state(indoc! {"
 2794        one two
 2795        t«hree
 2796        ˇ» four
 2797    "});
 2798
 2799    // Ensure that indenting/outdenting works when the cursor is at column 0.
 2800    cx.set_state(indoc! {"
 2801        one two
 2802        ˇthree
 2803            four
 2804    "});
 2805    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2806    cx.assert_editor_state(indoc! {"
 2807        one two
 2808            ˇthree
 2809            four
 2810    "});
 2811
 2812    cx.set_state(indoc! {"
 2813        one two
 2814        ˇ    three
 2815            four
 2816    "});
 2817    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2818    cx.assert_editor_state(indoc! {"
 2819        one two
 2820        ˇthree
 2821            four
 2822    "});
 2823}
 2824
 2825#[gpui::test]
 2826async fn test_indent_outdent_with_hard_tabs(cx: &mut gpui::TestAppContext) {
 2827    init_test(cx, |settings| {
 2828        settings.defaults.hard_tabs = Some(true);
 2829    });
 2830
 2831    let mut cx = EditorTestContext::new(cx).await;
 2832
 2833    // select two ranges on one line
 2834    cx.set_state(indoc! {"
 2835        «oneˇ» «twoˇ»
 2836        three
 2837        four
 2838    "});
 2839    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2840    cx.assert_editor_state(indoc! {"
 2841        \t«oneˇ» «twoˇ»
 2842        three
 2843        four
 2844    "});
 2845    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2846    cx.assert_editor_state(indoc! {"
 2847        \t\t«oneˇ» «twoˇ»
 2848        three
 2849        four
 2850    "});
 2851    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2852    cx.assert_editor_state(indoc! {"
 2853        \t«oneˇ» «twoˇ»
 2854        three
 2855        four
 2856    "});
 2857    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2858    cx.assert_editor_state(indoc! {"
 2859        «oneˇ» «twoˇ»
 2860        three
 2861        four
 2862    "});
 2863
 2864    // select across a line ending
 2865    cx.set_state(indoc! {"
 2866        one two
 2867        t«hree
 2868        ˇ»four
 2869    "});
 2870    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2871    cx.assert_editor_state(indoc! {"
 2872        one two
 2873        \tt«hree
 2874        ˇ»four
 2875    "});
 2876    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2877    cx.assert_editor_state(indoc! {"
 2878        one two
 2879        \t\tt«hree
 2880        ˇ»four
 2881    "});
 2882    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2883    cx.assert_editor_state(indoc! {"
 2884        one two
 2885        \tt«hree
 2886        ˇ»four
 2887    "});
 2888    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2889    cx.assert_editor_state(indoc! {"
 2890        one two
 2891        t«hree
 2892        ˇ»four
 2893    "});
 2894
 2895    // Ensure that indenting/outdenting works when the cursor is at column 0.
 2896    cx.set_state(indoc! {"
 2897        one two
 2898        ˇthree
 2899        four
 2900    "});
 2901    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2902    cx.assert_editor_state(indoc! {"
 2903        one two
 2904        ˇthree
 2905        four
 2906    "});
 2907    cx.update_editor(|e, cx| e.tab(&Tab, cx));
 2908    cx.assert_editor_state(indoc! {"
 2909        one two
 2910        \tˇthree
 2911        four
 2912    "});
 2913    cx.update_editor(|e, cx| e.tab_prev(&TabPrev, cx));
 2914    cx.assert_editor_state(indoc! {"
 2915        one two
 2916        ˇthree
 2917        four
 2918    "});
 2919}
 2920
 2921#[gpui::test]
 2922fn test_indent_outdent_with_excerpts(cx: &mut TestAppContext) {
 2923    init_test(cx, |settings| {
 2924        settings.languages.extend([
 2925            (
 2926                "TOML".into(),
 2927                LanguageSettingsContent {
 2928                    tab_size: NonZeroU32::new(2),
 2929                    ..Default::default()
 2930                },
 2931            ),
 2932            (
 2933                "Rust".into(),
 2934                LanguageSettingsContent {
 2935                    tab_size: NonZeroU32::new(4),
 2936                    ..Default::default()
 2937                },
 2938            ),
 2939        ]);
 2940    });
 2941
 2942    let toml_language = Arc::new(Language::new(
 2943        LanguageConfig {
 2944            name: "TOML".into(),
 2945            ..Default::default()
 2946        },
 2947        None,
 2948    ));
 2949    let rust_language = Arc::new(Language::new(
 2950        LanguageConfig {
 2951            name: "Rust".into(),
 2952            ..Default::default()
 2953        },
 2954        None,
 2955    ));
 2956
 2957    let toml_buffer =
 2958        cx.new_model(|cx| Buffer::local("a = 1\nb = 2\n", cx).with_language(toml_language, cx));
 2959    let rust_buffer = cx.new_model(|cx| {
 2960        Buffer::local("const c: usize = 3;\n", cx).with_language(rust_language, cx)
 2961    });
 2962    let multibuffer = cx.new_model(|cx| {
 2963        let mut multibuffer = MultiBuffer::new(ReadWrite);
 2964        multibuffer.push_excerpts(
 2965            toml_buffer.clone(),
 2966            [ExcerptRange {
 2967                context: Point::new(0, 0)..Point::new(2, 0),
 2968                primary: None,
 2969            }],
 2970            cx,
 2971        );
 2972        multibuffer.push_excerpts(
 2973            rust_buffer.clone(),
 2974            [ExcerptRange {
 2975                context: Point::new(0, 0)..Point::new(1, 0),
 2976                primary: None,
 2977            }],
 2978            cx,
 2979        );
 2980        multibuffer
 2981    });
 2982
 2983    cx.add_window(|cx| {
 2984        let mut editor = build_editor(multibuffer, cx);
 2985
 2986        assert_eq!(
 2987            editor.text(cx),
 2988            indoc! {"
 2989                a = 1
 2990                b = 2
 2991
 2992                const c: usize = 3;
 2993            "}
 2994        );
 2995
 2996        select_ranges(
 2997            &mut editor,
 2998            indoc! {"
 2999                «aˇ» = 1
 3000                b = 2
 3001
 3002                «const c:ˇ» usize = 3;
 3003            "},
 3004            cx,
 3005        );
 3006
 3007        editor.tab(&Tab, cx);
 3008        assert_text_with_selections(
 3009            &mut editor,
 3010            indoc! {"
 3011                  «aˇ» = 1
 3012                b = 2
 3013
 3014                    «const c:ˇ» usize = 3;
 3015            "},
 3016            cx,
 3017        );
 3018        editor.tab_prev(&TabPrev, cx);
 3019        assert_text_with_selections(
 3020            &mut editor,
 3021            indoc! {"
 3022                «aˇ» = 1
 3023                b = 2
 3024
 3025                «const c:ˇ» usize = 3;
 3026            "},
 3027            cx,
 3028        );
 3029
 3030        editor
 3031    });
 3032}
 3033
 3034#[gpui::test]
 3035async fn test_backspace(cx: &mut gpui::TestAppContext) {
 3036    init_test(cx, |_| {});
 3037
 3038    let mut cx = EditorTestContext::new(cx).await;
 3039
 3040    // Basic backspace
 3041    cx.set_state(indoc! {"
 3042        onˇe two three
 3043        fou«rˇ» five six
 3044        seven «ˇeight nine
 3045        »ten
 3046    "});
 3047    cx.update_editor(|e, cx| e.backspace(&Backspace, cx));
 3048    cx.assert_editor_state(indoc! {"
 3049        oˇe two three
 3050        fouˇ five six
 3051        seven ˇten
 3052    "});
 3053
 3054    // Test backspace inside and around indents
 3055    cx.set_state(indoc! {"
 3056        zero
 3057            ˇone
 3058                ˇtwo
 3059            ˇ ˇ ˇ  three
 3060        ˇ  ˇ  four
 3061    "});
 3062    cx.update_editor(|e, cx| e.backspace(&Backspace, cx));
 3063    cx.assert_editor_state(indoc! {"
 3064        zero
 3065        ˇone
 3066            ˇtwo
 3067        ˇ  threeˇ  four
 3068    "});
 3069
 3070    // Test backspace with line_mode set to true
 3071    cx.update_editor(|e, _| e.selections.line_mode = true);
 3072    cx.set_state(indoc! {"
 3073        The ˇquick ˇbrown
 3074        fox jumps over
 3075        the lazy dog
 3076        ˇThe qu«ick bˇ»rown"});
 3077    cx.update_editor(|e, cx| e.backspace(&Backspace, cx));
 3078    cx.assert_editor_state(indoc! {"
 3079        ˇfox jumps over
 3080        the lazy dogˇ"});
 3081}
 3082
 3083#[gpui::test]
 3084async fn test_delete(cx: &mut gpui::TestAppContext) {
 3085    init_test(cx, |_| {});
 3086
 3087    let mut cx = EditorTestContext::new(cx).await;
 3088    cx.set_state(indoc! {"
 3089        onˇe two three
 3090        fou«rˇ» five six
 3091        seven «ˇeight nine
 3092        »ten
 3093    "});
 3094    cx.update_editor(|e, cx| e.delete(&Delete, cx));
 3095    cx.assert_editor_state(indoc! {"
 3096        onˇ two three
 3097        fouˇ five six
 3098        seven ˇten
 3099    "});
 3100
 3101    // Test backspace with line_mode set to true
 3102    cx.update_editor(|e, _| e.selections.line_mode = true);
 3103    cx.set_state(indoc! {"
 3104        The ˇquick ˇbrown
 3105        fox «ˇjum»ps over
 3106        the lazy dog
 3107        ˇThe qu«ick bˇ»rown"});
 3108    cx.update_editor(|e, cx| e.backspace(&Backspace, cx));
 3109    cx.assert_editor_state("ˇthe lazy dogˇ");
 3110}
 3111
 3112#[gpui::test]
 3113fn test_delete_line(cx: &mut TestAppContext) {
 3114    init_test(cx, |_| {});
 3115
 3116    let view = cx.add_window(|cx| {
 3117        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3118        build_editor(buffer, cx)
 3119    });
 3120    _ = view.update(cx, |view, cx| {
 3121        view.change_selections(None, cx, |s| {
 3122            s.select_display_ranges([
 3123                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 3124                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 3125                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 3126            ])
 3127        });
 3128        view.delete_line(&DeleteLine, cx);
 3129        assert_eq!(view.display_text(cx), "ghi");
 3130        assert_eq!(
 3131            view.selections.display_ranges(cx),
 3132            vec![
 3133                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 0),
 3134                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1)
 3135            ]
 3136        );
 3137    });
 3138
 3139    let view = cx.add_window(|cx| {
 3140        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3141        build_editor(buffer, cx)
 3142    });
 3143    _ = view.update(cx, |view, cx| {
 3144        view.change_selections(None, cx, |s| {
 3145            s.select_display_ranges([
 3146                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(0), 1)
 3147            ])
 3148        });
 3149        view.delete_line(&DeleteLine, cx);
 3150        assert_eq!(view.display_text(cx), "ghi\n");
 3151        assert_eq!(
 3152            view.selections.display_ranges(cx),
 3153            vec![DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1)]
 3154        );
 3155    });
 3156}
 3157
 3158#[gpui::test]
 3159fn test_join_lines_with_single_selection(cx: &mut TestAppContext) {
 3160    init_test(cx, |_| {});
 3161
 3162    cx.add_window(|cx| {
 3163        let buffer = MultiBuffer::build_simple("aaa\nbbb\nccc\nddd\n\n", cx);
 3164        let mut editor = build_editor(buffer.clone(), cx);
 3165        let buffer = buffer.read(cx).as_singleton().unwrap();
 3166
 3167        assert_eq!(
 3168            editor.selections.ranges::<Point>(cx),
 3169            &[Point::new(0, 0)..Point::new(0, 0)]
 3170        );
 3171
 3172        // When on single line, replace newline at end by space
 3173        editor.join_lines(&JoinLines, cx);
 3174        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n\n");
 3175        assert_eq!(
 3176            editor.selections.ranges::<Point>(cx),
 3177            &[Point::new(0, 3)..Point::new(0, 3)]
 3178        );
 3179
 3180        // When multiple lines are selected, remove newlines that are spanned by the selection
 3181        editor.change_selections(None, cx, |s| {
 3182            s.select_ranges([Point::new(0, 5)..Point::new(2, 2)])
 3183        });
 3184        editor.join_lines(&JoinLines, cx);
 3185        assert_eq!(buffer.read(cx).text(), "aaa bbb ccc ddd\n\n");
 3186        assert_eq!(
 3187            editor.selections.ranges::<Point>(cx),
 3188            &[Point::new(0, 11)..Point::new(0, 11)]
 3189        );
 3190
 3191        // Undo should be transactional
 3192        editor.undo(&Undo, cx);
 3193        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n\n");
 3194        assert_eq!(
 3195            editor.selections.ranges::<Point>(cx),
 3196            &[Point::new(0, 5)..Point::new(2, 2)]
 3197        );
 3198
 3199        // When joining an empty line don't insert a space
 3200        editor.change_selections(None, cx, |s| {
 3201            s.select_ranges([Point::new(2, 1)..Point::new(2, 2)])
 3202        });
 3203        editor.join_lines(&JoinLines, cx);
 3204        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd\n");
 3205        assert_eq!(
 3206            editor.selections.ranges::<Point>(cx),
 3207            [Point::new(2, 3)..Point::new(2, 3)]
 3208        );
 3209
 3210        // We can remove trailing newlines
 3211        editor.join_lines(&JoinLines, cx);
 3212        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd");
 3213        assert_eq!(
 3214            editor.selections.ranges::<Point>(cx),
 3215            [Point::new(2, 3)..Point::new(2, 3)]
 3216        );
 3217
 3218        // We don't blow up on the last line
 3219        editor.join_lines(&JoinLines, cx);
 3220        assert_eq!(buffer.read(cx).text(), "aaa bbb\nccc\nddd");
 3221        assert_eq!(
 3222            editor.selections.ranges::<Point>(cx),
 3223            [Point::new(2, 3)..Point::new(2, 3)]
 3224        );
 3225
 3226        // reset to test indentation
 3227        editor.buffer.update(cx, |buffer, cx| {
 3228            buffer.edit(
 3229                [
 3230                    (Point::new(1, 0)..Point::new(1, 2), "  "),
 3231                    (Point::new(2, 0)..Point::new(2, 3), "  \n\td"),
 3232                ],
 3233                None,
 3234                cx,
 3235            )
 3236        });
 3237
 3238        // We remove any leading spaces
 3239        assert_eq!(buffer.read(cx).text(), "aaa bbb\n  c\n  \n\td");
 3240        editor.change_selections(None, cx, |s| {
 3241            s.select_ranges([Point::new(0, 1)..Point::new(0, 1)])
 3242        });
 3243        editor.join_lines(&JoinLines, cx);
 3244        assert_eq!(buffer.read(cx).text(), "aaa bbb c\n  \n\td");
 3245
 3246        // We don't insert a space for a line containing only spaces
 3247        editor.join_lines(&JoinLines, cx);
 3248        assert_eq!(buffer.read(cx).text(), "aaa bbb c\n\td");
 3249
 3250        // We ignore any leading tabs
 3251        editor.join_lines(&JoinLines, cx);
 3252        assert_eq!(buffer.read(cx).text(), "aaa bbb c d");
 3253
 3254        editor
 3255    });
 3256}
 3257
 3258#[gpui::test]
 3259fn test_join_lines_with_multi_selection(cx: &mut TestAppContext) {
 3260    init_test(cx, |_| {});
 3261
 3262    cx.add_window(|cx| {
 3263        let buffer = MultiBuffer::build_simple("aaa\nbbb\nccc\nddd\n\n", cx);
 3264        let mut editor = build_editor(buffer.clone(), cx);
 3265        let buffer = buffer.read(cx).as_singleton().unwrap();
 3266
 3267        editor.change_selections(None, cx, |s| {
 3268            s.select_ranges([
 3269                Point::new(0, 2)..Point::new(1, 1),
 3270                Point::new(1, 2)..Point::new(1, 2),
 3271                Point::new(3, 1)..Point::new(3, 2),
 3272            ])
 3273        });
 3274
 3275        editor.join_lines(&JoinLines, cx);
 3276        assert_eq!(buffer.read(cx).text(), "aaa bbb ccc\nddd\n");
 3277
 3278        assert_eq!(
 3279            editor.selections.ranges::<Point>(cx),
 3280            [
 3281                Point::new(0, 7)..Point::new(0, 7),
 3282                Point::new(1, 3)..Point::new(1, 3)
 3283            ]
 3284        );
 3285        editor
 3286    });
 3287}
 3288
 3289#[gpui::test]
 3290async fn test_join_lines_with_git_diff_base(
 3291    executor: BackgroundExecutor,
 3292    cx: &mut gpui::TestAppContext,
 3293) {
 3294    init_test(cx, |_| {});
 3295
 3296    let mut cx = EditorTestContext::new(cx).await;
 3297
 3298    let diff_base = r#"
 3299        Line 0
 3300        Line 1
 3301        Line 2
 3302        Line 3
 3303        "#
 3304    .unindent();
 3305
 3306    cx.set_state(
 3307        &r#"
 3308        ˇLine 0
 3309        Line 1
 3310        Line 2
 3311        Line 3
 3312        "#
 3313        .unindent(),
 3314    );
 3315
 3316    cx.set_diff_base(&diff_base);
 3317    executor.run_until_parked();
 3318
 3319    // Join lines
 3320    cx.update_editor(|editor, cx| {
 3321        editor.join_lines(&JoinLines, cx);
 3322    });
 3323    executor.run_until_parked();
 3324
 3325    cx.assert_editor_state(
 3326        &r#"
 3327        Line 0ˇ Line 1
 3328        Line 2
 3329        Line 3
 3330        "#
 3331        .unindent(),
 3332    );
 3333    // Join again
 3334    cx.update_editor(|editor, cx| {
 3335        editor.join_lines(&JoinLines, cx);
 3336    });
 3337    executor.run_until_parked();
 3338
 3339    cx.assert_editor_state(
 3340        &r#"
 3341        Line 0 Line 1ˇ Line 2
 3342        Line 3
 3343        "#
 3344        .unindent(),
 3345    );
 3346}
 3347
 3348#[gpui::test]
 3349async fn test_custom_newlines_cause_no_false_positive_diffs(
 3350    executor: BackgroundExecutor,
 3351    cx: &mut gpui::TestAppContext,
 3352) {
 3353    init_test(cx, |_| {});
 3354    let mut cx = EditorTestContext::new(cx).await;
 3355    cx.set_state("Line 0\r\nLine 1\rˇ\nLine 2\r\nLine 3");
 3356    cx.set_diff_base("Line 0\r\nLine 1\r\nLine 2\r\nLine 3");
 3357    executor.run_until_parked();
 3358
 3359    cx.update_editor(|editor, cx| {
 3360        let snapshot = editor.snapshot(cx);
 3361        assert_eq!(
 3362            snapshot
 3363                .diff_map
 3364                .diff_hunks_in_range(0..snapshot.buffer_snapshot.len(), &snapshot.buffer_snapshot)
 3365                .collect::<Vec<_>>(),
 3366            Vec::new(),
 3367            "Should not have any diffs for files with custom newlines"
 3368        );
 3369    });
 3370}
 3371
 3372#[gpui::test]
 3373async fn test_manipulate_lines_with_single_selection(cx: &mut TestAppContext) {
 3374    init_test(cx, |_| {});
 3375
 3376    let mut cx = EditorTestContext::new(cx).await;
 3377
 3378    // Test sort_lines_case_insensitive()
 3379    cx.set_state(indoc! {"
 3380        «z
 3381        y
 3382        x
 3383        Z
 3384        Y
 3385        Xˇ»
 3386    "});
 3387    cx.update_editor(|e, cx| e.sort_lines_case_insensitive(&SortLinesCaseInsensitive, cx));
 3388    cx.assert_editor_state(indoc! {"
 3389        «x
 3390        X
 3391        y
 3392        Y
 3393        z
 3394        Zˇ»
 3395    "});
 3396
 3397    // Test reverse_lines()
 3398    cx.set_state(indoc! {"
 3399        «5
 3400        4
 3401        3
 3402        2
 3403        1ˇ»
 3404    "});
 3405    cx.update_editor(|e, cx| e.reverse_lines(&ReverseLines, cx));
 3406    cx.assert_editor_state(indoc! {"
 3407        «1
 3408        2
 3409        3
 3410        4
 3411        5ˇ»
 3412    "});
 3413
 3414    // Skip testing shuffle_line()
 3415
 3416    // From here on out, test more complex cases of manipulate_lines() with a single driver method: sort_lines_case_sensitive()
 3417    // Since all methods calling manipulate_lines() are doing the exact same general thing (reordering lines)
 3418
 3419    // Don't manipulate when cursor is on single line, but expand the selection
 3420    cx.set_state(indoc! {"
 3421        ddˇdd
 3422        ccc
 3423        bb
 3424        a
 3425    "});
 3426    cx.update_editor(|e, cx| e.sort_lines_case_sensitive(&SortLinesCaseSensitive, cx));
 3427    cx.assert_editor_state(indoc! {"
 3428        «ddddˇ»
 3429        ccc
 3430        bb
 3431        a
 3432    "});
 3433
 3434    // Basic manipulate case
 3435    // Start selection moves to column 0
 3436    // End of selection shrinks to fit shorter line
 3437    cx.set_state(indoc! {"
 3438        dd«d
 3439        ccc
 3440        bb
 3441        aaaaaˇ»
 3442    "});
 3443    cx.update_editor(|e, cx| e.sort_lines_case_sensitive(&SortLinesCaseSensitive, cx));
 3444    cx.assert_editor_state(indoc! {"
 3445        «aaaaa
 3446        bb
 3447        ccc
 3448        dddˇ»
 3449    "});
 3450
 3451    // Manipulate case with newlines
 3452    cx.set_state(indoc! {"
 3453        dd«d
 3454        ccc
 3455
 3456        bb
 3457        aaaaa
 3458
 3459        ˇ»
 3460    "});
 3461    cx.update_editor(|e, cx| e.sort_lines_case_sensitive(&SortLinesCaseSensitive, cx));
 3462    cx.assert_editor_state(indoc! {"
 3463        «
 3464
 3465        aaaaa
 3466        bb
 3467        ccc
 3468        dddˇ»
 3469
 3470    "});
 3471
 3472    // Adding new line
 3473    cx.set_state(indoc! {"
 3474        aa«a
 3475        bbˇ»b
 3476    "});
 3477    cx.update_editor(|e, cx| e.manipulate_lines(cx, |lines| lines.push("added_line")));
 3478    cx.assert_editor_state(indoc! {"
 3479        «aaa
 3480        bbb
 3481        added_lineˇ»
 3482    "});
 3483
 3484    // Removing line
 3485    cx.set_state(indoc! {"
 3486        aa«a
 3487        bbbˇ»
 3488    "});
 3489    cx.update_editor(|e, cx| {
 3490        e.manipulate_lines(cx, |lines| {
 3491            lines.pop();
 3492        })
 3493    });
 3494    cx.assert_editor_state(indoc! {"
 3495        «aaaˇ»
 3496    "});
 3497
 3498    // Removing all lines
 3499    cx.set_state(indoc! {"
 3500        aa«a
 3501        bbbˇ»
 3502    "});
 3503    cx.update_editor(|e, cx| {
 3504        e.manipulate_lines(cx, |lines| {
 3505            lines.drain(..);
 3506        })
 3507    });
 3508    cx.assert_editor_state(indoc! {"
 3509        ˇ
 3510    "});
 3511}
 3512
 3513#[gpui::test]
 3514async fn test_unique_lines_multi_selection(cx: &mut TestAppContext) {
 3515    init_test(cx, |_| {});
 3516
 3517    let mut cx = EditorTestContext::new(cx).await;
 3518
 3519    // Consider continuous selection as single selection
 3520    cx.set_state(indoc! {"
 3521        Aaa«aa
 3522        cˇ»c«c
 3523        bb
 3524        aaaˇ»aa
 3525    "});
 3526    cx.update_editor(|e, cx| e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, cx));
 3527    cx.assert_editor_state(indoc! {"
 3528        «Aaaaa
 3529        ccc
 3530        bb
 3531        aaaaaˇ»
 3532    "});
 3533
 3534    cx.set_state(indoc! {"
 3535        Aaa«aa
 3536        cˇ»c«c
 3537        bb
 3538        aaaˇ»aa
 3539    "});
 3540    cx.update_editor(|e, cx| e.unique_lines_case_insensitive(&UniqueLinesCaseInsensitive, cx));
 3541    cx.assert_editor_state(indoc! {"
 3542        «Aaaaa
 3543        ccc
 3544        bbˇ»
 3545    "});
 3546
 3547    // Consider non continuous selection as distinct dedup operations
 3548    cx.set_state(indoc! {"
 3549        «aaaaa
 3550        bb
 3551        aaaaa
 3552        aaaaaˇ»
 3553
 3554        aaa«aaˇ»
 3555    "});
 3556    cx.update_editor(|e, cx| e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, cx));
 3557    cx.assert_editor_state(indoc! {"
 3558        «aaaaa
 3559        bbˇ»
 3560
 3561        «aaaaaˇ»
 3562    "});
 3563}
 3564
 3565#[gpui::test]
 3566async fn test_unique_lines_single_selection(cx: &mut TestAppContext) {
 3567    init_test(cx, |_| {});
 3568
 3569    let mut cx = EditorTestContext::new(cx).await;
 3570
 3571    cx.set_state(indoc! {"
 3572        «Aaa
 3573        aAa
 3574        Aaaˇ»
 3575    "});
 3576    cx.update_editor(|e, cx| e.unique_lines_case_sensitive(&UniqueLinesCaseSensitive, cx));
 3577    cx.assert_editor_state(indoc! {"
 3578        «Aaa
 3579        aAaˇ»
 3580    "});
 3581
 3582    cx.set_state(indoc! {"
 3583        «Aaa
 3584        aAa
 3585        aaAˇ»
 3586    "});
 3587    cx.update_editor(|e, cx| e.unique_lines_case_insensitive(&UniqueLinesCaseInsensitive, cx));
 3588    cx.assert_editor_state(indoc! {"
 3589        «Aaaˇ»
 3590    "});
 3591}
 3592
 3593#[gpui::test]
 3594async fn test_manipulate_lines_with_multi_selection(cx: &mut TestAppContext) {
 3595    init_test(cx, |_| {});
 3596
 3597    let mut cx = EditorTestContext::new(cx).await;
 3598
 3599    // Manipulate with multiple selections on a single line
 3600    cx.set_state(indoc! {"
 3601        dd«dd
 3602        cˇ»c«c
 3603        bb
 3604        aaaˇ»aa
 3605    "});
 3606    cx.update_editor(|e, cx| e.sort_lines_case_sensitive(&SortLinesCaseSensitive, cx));
 3607    cx.assert_editor_state(indoc! {"
 3608        «aaaaa
 3609        bb
 3610        ccc
 3611        ddddˇ»
 3612    "});
 3613
 3614    // Manipulate with multiple disjoin selections
 3615    cx.set_state(indoc! {"
 3616 3617        4
 3618        3
 3619        2
 3620        1ˇ»
 3621
 3622        dd«dd
 3623        ccc
 3624        bb
 3625        aaaˇ»aa
 3626    "});
 3627    cx.update_editor(|e, cx| e.sort_lines_case_sensitive(&SortLinesCaseSensitive, cx));
 3628    cx.assert_editor_state(indoc! {"
 3629        «1
 3630        2
 3631        3
 3632        4
 3633        5ˇ»
 3634
 3635        «aaaaa
 3636        bb
 3637        ccc
 3638        ddddˇ»
 3639    "});
 3640
 3641    // Adding lines on each selection
 3642    cx.set_state(indoc! {"
 3643 3644        1ˇ»
 3645
 3646        bb«bb
 3647        aaaˇ»aa
 3648    "});
 3649    cx.update_editor(|e, cx| e.manipulate_lines(cx, |lines| lines.push("added line")));
 3650    cx.assert_editor_state(indoc! {"
 3651        «2
 3652        1
 3653        added lineˇ»
 3654
 3655        «bbbb
 3656        aaaaa
 3657        added lineˇ»
 3658    "});
 3659
 3660    // Removing lines on each selection
 3661    cx.set_state(indoc! {"
 3662 3663        1ˇ»
 3664
 3665        bb«bb
 3666        aaaˇ»aa
 3667    "});
 3668    cx.update_editor(|e, cx| {
 3669        e.manipulate_lines(cx, |lines| {
 3670            lines.pop();
 3671        })
 3672    });
 3673    cx.assert_editor_state(indoc! {"
 3674        «2ˇ»
 3675
 3676        «bbbbˇ»
 3677    "});
 3678}
 3679
 3680#[gpui::test]
 3681async fn test_manipulate_text(cx: &mut TestAppContext) {
 3682    init_test(cx, |_| {});
 3683
 3684    let mut cx = EditorTestContext::new(cx).await;
 3685
 3686    // Test convert_to_upper_case()
 3687    cx.set_state(indoc! {"
 3688        «hello worldˇ»
 3689    "});
 3690    cx.update_editor(|e, cx| e.convert_to_upper_case(&ConvertToUpperCase, cx));
 3691    cx.assert_editor_state(indoc! {"
 3692        «HELLO WORLDˇ»
 3693    "});
 3694
 3695    // Test convert_to_lower_case()
 3696    cx.set_state(indoc! {"
 3697        «HELLO WORLDˇ»
 3698    "});
 3699    cx.update_editor(|e, cx| e.convert_to_lower_case(&ConvertToLowerCase, cx));
 3700    cx.assert_editor_state(indoc! {"
 3701        «hello worldˇ»
 3702    "});
 3703
 3704    // Test multiple line, single selection case
 3705    // Test code hack that covers the fact that to_case crate doesn't support '\n' as a word boundary
 3706    cx.set_state(indoc! {"
 3707        «The quick brown
 3708        fox jumps over
 3709        the lazy dogˇ»
 3710    "});
 3711    cx.update_editor(|e, cx| e.convert_to_title_case(&ConvertToTitleCase, cx));
 3712    cx.assert_editor_state(indoc! {"
 3713        «The Quick Brown
 3714        Fox Jumps Over
 3715        The Lazy Dogˇ»
 3716    "});
 3717
 3718    // Test multiple line, single selection case
 3719    // Test code hack that covers the fact that to_case crate doesn't support '\n' as a word boundary
 3720    cx.set_state(indoc! {"
 3721        «The quick brown
 3722        fox jumps over
 3723        the lazy dogˇ»
 3724    "});
 3725    cx.update_editor(|e, cx| e.convert_to_upper_camel_case(&ConvertToUpperCamelCase, cx));
 3726    cx.assert_editor_state(indoc! {"
 3727        «TheQuickBrown
 3728        FoxJumpsOver
 3729        TheLazyDogˇ»
 3730    "});
 3731
 3732    // From here on out, test more complex cases of manipulate_text()
 3733
 3734    // Test no selection case - should affect words cursors are in
 3735    // Cursor at beginning, middle, and end of word
 3736    cx.set_state(indoc! {"
 3737        ˇhello big beauˇtiful worldˇ
 3738    "});
 3739    cx.update_editor(|e, cx| e.convert_to_upper_case(&ConvertToUpperCase, cx));
 3740    cx.assert_editor_state(indoc! {"
 3741        «HELLOˇ» big «BEAUTIFULˇ» «WORLDˇ»
 3742    "});
 3743
 3744    // Test multiple selections on a single line and across multiple lines
 3745    cx.set_state(indoc! {"
 3746        «Theˇ» quick «brown
 3747        foxˇ» jumps «overˇ»
 3748        the «lazyˇ» dog
 3749    "});
 3750    cx.update_editor(|e, cx| e.convert_to_upper_case(&ConvertToUpperCase, cx));
 3751    cx.assert_editor_state(indoc! {"
 3752        «THEˇ» quick «BROWN
 3753        FOXˇ» jumps «OVERˇ»
 3754        the «LAZYˇ» dog
 3755    "});
 3756
 3757    // Test case where text length grows
 3758    cx.set_state(indoc! {"
 3759        «tschüߡ»
 3760    "});
 3761    cx.update_editor(|e, cx| e.convert_to_upper_case(&ConvertToUpperCase, cx));
 3762    cx.assert_editor_state(indoc! {"
 3763        «TSCHÜSSˇ»
 3764    "});
 3765
 3766    // Test to make sure we don't crash when text shrinks
 3767    cx.set_state(indoc! {"
 3768        aaa_bbbˇ
 3769    "});
 3770    cx.update_editor(|e, cx| e.convert_to_lower_camel_case(&ConvertToLowerCamelCase, cx));
 3771    cx.assert_editor_state(indoc! {"
 3772        «aaaBbbˇ»
 3773    "});
 3774
 3775    // Test to make sure we all aware of the fact that each word can grow and shrink
 3776    // Final selections should be aware of this fact
 3777    cx.set_state(indoc! {"
 3778        aaa_bˇbb bbˇb_ccc ˇccc_ddd
 3779    "});
 3780    cx.update_editor(|e, cx| e.convert_to_lower_camel_case(&ConvertToLowerCamelCase, cx));
 3781    cx.assert_editor_state(indoc! {"
 3782        «aaaBbbˇ» «bbbCccˇ» «cccDddˇ»
 3783    "});
 3784
 3785    cx.set_state(indoc! {"
 3786        «hElLo, WoRld!ˇ»
 3787    "});
 3788    cx.update_editor(|e, cx| e.convert_to_opposite_case(&ConvertToOppositeCase, cx));
 3789    cx.assert_editor_state(indoc! {"
 3790        «HeLlO, wOrLD!ˇ»
 3791    "});
 3792}
 3793
 3794#[gpui::test]
 3795fn test_duplicate_line(cx: &mut TestAppContext) {
 3796    init_test(cx, |_| {});
 3797
 3798    let view = cx.add_window(|cx| {
 3799        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3800        build_editor(buffer, cx)
 3801    });
 3802    _ = view.update(cx, |view, cx| {
 3803        view.change_selections(None, cx, |s| {
 3804            s.select_display_ranges([
 3805                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 3806                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 3807                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 3808                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 3809            ])
 3810        });
 3811        view.duplicate_line_down(&DuplicateLineDown, cx);
 3812        assert_eq!(view.display_text(cx), "abc\nabc\ndef\ndef\nghi\n\n");
 3813        assert_eq!(
 3814            view.selections.display_ranges(cx),
 3815            vec![
 3816                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 3817                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(1), 2),
 3818                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 3819                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(6), 0),
 3820            ]
 3821        );
 3822    });
 3823
 3824    let view = cx.add_window(|cx| {
 3825        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3826        build_editor(buffer, cx)
 3827    });
 3828    _ = view.update(cx, |view, cx| {
 3829        view.change_selections(None, cx, |s| {
 3830            s.select_display_ranges([
 3831                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 3832                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 3833            ])
 3834        });
 3835        view.duplicate_line_down(&DuplicateLineDown, cx);
 3836        assert_eq!(view.display_text(cx), "abc\ndef\nghi\nabc\ndef\nghi\n");
 3837        assert_eq!(
 3838            view.selections.display_ranges(cx),
 3839            vec![
 3840                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(4), 1),
 3841                DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(5), 1),
 3842            ]
 3843        );
 3844    });
 3845
 3846    // With `move_upwards` the selections stay in place, except for
 3847    // the lines inserted above them
 3848    let view = cx.add_window(|cx| {
 3849        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3850        build_editor(buffer, cx)
 3851    });
 3852    _ = view.update(cx, |view, cx| {
 3853        view.change_selections(None, cx, |s| {
 3854            s.select_display_ranges([
 3855                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 3856                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 3857                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 3858                DisplayPoint::new(DisplayRow(3), 0)..DisplayPoint::new(DisplayRow(3), 0),
 3859            ])
 3860        });
 3861        view.duplicate_line_up(&DuplicateLineUp, cx);
 3862        assert_eq!(view.display_text(cx), "abc\nabc\ndef\ndef\nghi\n\n");
 3863        assert_eq!(
 3864            view.selections.display_ranges(cx),
 3865            vec![
 3866                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 3867                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 3868                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 0),
 3869                DisplayPoint::new(DisplayRow(6), 0)..DisplayPoint::new(DisplayRow(6), 0),
 3870            ]
 3871        );
 3872    });
 3873
 3874    let view = cx.add_window(|cx| {
 3875        let buffer = MultiBuffer::build_simple("abc\ndef\nghi\n", cx);
 3876        build_editor(buffer, cx)
 3877    });
 3878    _ = view.update(cx, |view, cx| {
 3879        view.change_selections(None, cx, |s| {
 3880            s.select_display_ranges([
 3881                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 3882                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 3883            ])
 3884        });
 3885        view.duplicate_line_up(&DuplicateLineUp, cx);
 3886        assert_eq!(view.display_text(cx), "abc\ndef\nghi\nabc\ndef\nghi\n");
 3887        assert_eq!(
 3888            view.selections.display_ranges(cx),
 3889            vec![
 3890                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(1), 1),
 3891                DisplayPoint::new(DisplayRow(1), 2)..DisplayPoint::new(DisplayRow(2), 1),
 3892            ]
 3893        );
 3894    });
 3895}
 3896
 3897#[gpui::test]
 3898fn test_move_line_up_down(cx: &mut TestAppContext) {
 3899    init_test(cx, |_| {});
 3900
 3901    let view = cx.add_window(|cx| {
 3902        let buffer = MultiBuffer::build_simple(&sample_text(10, 5, 'a'), cx);
 3903        build_editor(buffer, cx)
 3904    });
 3905    _ = view.update(cx, |view, cx| {
 3906        view.fold_creases(
 3907            vec![
 3908                Crease::simple(Point::new(0, 2)..Point::new(1, 2), FoldPlaceholder::test()),
 3909                Crease::simple(Point::new(2, 3)..Point::new(4, 1), FoldPlaceholder::test()),
 3910                Crease::simple(Point::new(7, 0)..Point::new(8, 4), FoldPlaceholder::test()),
 3911            ],
 3912            true,
 3913            cx,
 3914        );
 3915        view.change_selections(None, cx, |s| {
 3916            s.select_display_ranges([
 3917                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 3918                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 3919                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 3920                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2),
 3921            ])
 3922        });
 3923        assert_eq!(
 3924            view.display_text(cx),
 3925            "aa⋯bbb\nccc⋯eeee\nfffff\nggggg\n⋯i\njjjjj"
 3926        );
 3927
 3928        view.move_line_up(&MoveLineUp, cx);
 3929        assert_eq!(
 3930            view.display_text(cx),
 3931            "aa⋯bbb\nccc⋯eeee\nggggg\n⋯i\njjjjj\nfffff"
 3932        );
 3933        assert_eq!(
 3934            view.selections.display_ranges(cx),
 3935            vec![
 3936                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 3937                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 3938                DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3),
 3939                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(4), 2)
 3940            ]
 3941        );
 3942    });
 3943
 3944    _ = view.update(cx, |view, cx| {
 3945        view.move_line_down(&MoveLineDown, cx);
 3946        assert_eq!(
 3947            view.display_text(cx),
 3948            "ccc⋯eeee\naa⋯bbb\nfffff\nggggg\n⋯i\njjjjj"
 3949        );
 3950        assert_eq!(
 3951            view.selections.display_ranges(cx),
 3952            vec![
 3953                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 3954                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 3955                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 3956                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2)
 3957            ]
 3958        );
 3959    });
 3960
 3961    _ = view.update(cx, |view, cx| {
 3962        view.move_line_down(&MoveLineDown, cx);
 3963        assert_eq!(
 3964            view.display_text(cx),
 3965            "ccc⋯eeee\nfffff\naa⋯bbb\nggggg\n⋯i\njjjjj"
 3966        );
 3967        assert_eq!(
 3968            view.selections.display_ranges(cx),
 3969            vec![
 3970                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 3971                DisplayPoint::new(DisplayRow(3), 1)..DisplayPoint::new(DisplayRow(3), 1),
 3972                DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(4), 3),
 3973                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(5), 2)
 3974            ]
 3975        );
 3976    });
 3977
 3978    _ = view.update(cx, |view, cx| {
 3979        view.move_line_up(&MoveLineUp, cx);
 3980        assert_eq!(
 3981            view.display_text(cx),
 3982            "ccc⋯eeee\naa⋯bbb\nggggg\n⋯i\njjjjj\nfffff"
 3983        );
 3984        assert_eq!(
 3985            view.selections.display_ranges(cx),
 3986            vec![
 3987                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 3988                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1),
 3989                DisplayPoint::new(DisplayRow(2), 2)..DisplayPoint::new(DisplayRow(3), 3),
 3990                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(4), 2)
 3991            ]
 3992        );
 3993    });
 3994}
 3995
 3996#[gpui::test]
 3997fn test_move_line_up_down_with_blocks(cx: &mut TestAppContext) {
 3998    init_test(cx, |_| {});
 3999
 4000    let editor = cx.add_window(|cx| {
 4001        let buffer = MultiBuffer::build_simple(&sample_text(10, 5, 'a'), cx);
 4002        build_editor(buffer, cx)
 4003    });
 4004    _ = editor.update(cx, |editor, cx| {
 4005        let snapshot = editor.buffer.read(cx).snapshot(cx);
 4006        editor.insert_blocks(
 4007            [BlockProperties {
 4008                style: BlockStyle::Fixed,
 4009                placement: BlockPlacement::Below(snapshot.anchor_after(Point::new(2, 0))),
 4010                height: 1,
 4011                render: Arc::new(|_| div().into_any()),
 4012                priority: 0,
 4013            }],
 4014            Some(Autoscroll::fit()),
 4015            cx,
 4016        );
 4017        editor.change_selections(None, cx, |s| {
 4018            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
 4019        });
 4020        editor.move_line_down(&MoveLineDown, cx);
 4021    });
 4022}
 4023
 4024#[gpui::test]
 4025async fn test_selections_and_replace_blocks(cx: &mut TestAppContext) {
 4026    init_test(cx, |_| {});
 4027
 4028    let mut cx = EditorTestContext::new(cx).await;
 4029    cx.set_state(
 4030        &"
 4031            ˇzero
 4032            one
 4033            two
 4034            three
 4035            four
 4036            five
 4037        "
 4038        .unindent(),
 4039    );
 4040
 4041    // Create a four-line block that replaces three lines of text.
 4042    cx.update_editor(|editor, cx| {
 4043        let snapshot = editor.snapshot(cx);
 4044        let snapshot = &snapshot.buffer_snapshot;
 4045        let placement = BlockPlacement::Replace(
 4046            snapshot.anchor_after(Point::new(1, 0))..snapshot.anchor_after(Point::new(3, 0)),
 4047        );
 4048        editor.insert_blocks(
 4049            [BlockProperties {
 4050                placement,
 4051                height: 4,
 4052                style: BlockStyle::Sticky,
 4053                render: Arc::new(|_| gpui::div().into_any_element()),
 4054                priority: 0,
 4055            }],
 4056            None,
 4057            cx,
 4058        );
 4059    });
 4060
 4061    // Move down so that the cursor touches the block.
 4062    cx.update_editor(|editor, cx| {
 4063        editor.move_down(&Default::default(), cx);
 4064    });
 4065    cx.assert_editor_state(
 4066        &"
 4067            zero
 4068            «one
 4069            two
 4070            threeˇ»
 4071            four
 4072            five
 4073        "
 4074        .unindent(),
 4075    );
 4076
 4077    // Move down past the block.
 4078    cx.update_editor(|editor, cx| {
 4079        editor.move_down(&Default::default(), cx);
 4080    });
 4081    cx.assert_editor_state(
 4082        &"
 4083            zero
 4084            one
 4085            two
 4086            three
 4087            ˇfour
 4088            five
 4089        "
 4090        .unindent(),
 4091    );
 4092}
 4093
 4094#[gpui::test]
 4095fn test_transpose(cx: &mut TestAppContext) {
 4096    init_test(cx, |_| {});
 4097
 4098    _ = cx.add_window(|cx| {
 4099        let mut editor = build_editor(MultiBuffer::build_simple("abc", cx), cx);
 4100        editor.set_style(EditorStyle::default(), cx);
 4101        editor.change_selections(None, cx, |s| s.select_ranges([1..1]));
 4102        editor.transpose(&Default::default(), cx);
 4103        assert_eq!(editor.text(cx), "bac");
 4104        assert_eq!(editor.selections.ranges(cx), [2..2]);
 4105
 4106        editor.transpose(&Default::default(), cx);
 4107        assert_eq!(editor.text(cx), "bca");
 4108        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4109
 4110        editor.transpose(&Default::default(), cx);
 4111        assert_eq!(editor.text(cx), "bac");
 4112        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4113
 4114        editor
 4115    });
 4116
 4117    _ = cx.add_window(|cx| {
 4118        let mut editor = build_editor(MultiBuffer::build_simple("abc\nde", cx), cx);
 4119        editor.set_style(EditorStyle::default(), cx);
 4120        editor.change_selections(None, cx, |s| s.select_ranges([3..3]));
 4121        editor.transpose(&Default::default(), cx);
 4122        assert_eq!(editor.text(cx), "acb\nde");
 4123        assert_eq!(editor.selections.ranges(cx), [3..3]);
 4124
 4125        editor.change_selections(None, cx, |s| s.select_ranges([4..4]));
 4126        editor.transpose(&Default::default(), cx);
 4127        assert_eq!(editor.text(cx), "acbd\ne");
 4128        assert_eq!(editor.selections.ranges(cx), [5..5]);
 4129
 4130        editor.transpose(&Default::default(), cx);
 4131        assert_eq!(editor.text(cx), "acbde\n");
 4132        assert_eq!(editor.selections.ranges(cx), [6..6]);
 4133
 4134        editor.transpose(&Default::default(), cx);
 4135        assert_eq!(editor.text(cx), "acbd\ne");
 4136        assert_eq!(editor.selections.ranges(cx), [6..6]);
 4137
 4138        editor
 4139    });
 4140
 4141    _ = cx.add_window(|cx| {
 4142        let mut editor = build_editor(MultiBuffer::build_simple("abc\nde", cx), cx);
 4143        editor.set_style(EditorStyle::default(), cx);
 4144        editor.change_selections(None, cx, |s| s.select_ranges([1..1, 2..2, 4..4]));
 4145        editor.transpose(&Default::default(), cx);
 4146        assert_eq!(editor.text(cx), "bacd\ne");
 4147        assert_eq!(editor.selections.ranges(cx), [2..2, 3..3, 5..5]);
 4148
 4149        editor.transpose(&Default::default(), cx);
 4150        assert_eq!(editor.text(cx), "bcade\n");
 4151        assert_eq!(editor.selections.ranges(cx), [3..3, 4..4, 6..6]);
 4152
 4153        editor.transpose(&Default::default(), cx);
 4154        assert_eq!(editor.text(cx), "bcda\ne");
 4155        assert_eq!(editor.selections.ranges(cx), [4..4, 6..6]);
 4156
 4157        editor.transpose(&Default::default(), cx);
 4158        assert_eq!(editor.text(cx), "bcade\n");
 4159        assert_eq!(editor.selections.ranges(cx), [4..4, 6..6]);
 4160
 4161        editor.transpose(&Default::default(), cx);
 4162        assert_eq!(editor.text(cx), "bcaed\n");
 4163        assert_eq!(editor.selections.ranges(cx), [5..5, 6..6]);
 4164
 4165        editor
 4166    });
 4167
 4168    _ = cx.add_window(|cx| {
 4169        let mut editor = build_editor(MultiBuffer::build_simple("🍐🏀✋", cx), cx);
 4170        editor.set_style(EditorStyle::default(), cx);
 4171        editor.change_selections(None, cx, |s| s.select_ranges([4..4]));
 4172        editor.transpose(&Default::default(), cx);
 4173        assert_eq!(editor.text(cx), "🏀🍐✋");
 4174        assert_eq!(editor.selections.ranges(cx), [8..8]);
 4175
 4176        editor.transpose(&Default::default(), cx);
 4177        assert_eq!(editor.text(cx), "🏀✋🍐");
 4178        assert_eq!(editor.selections.ranges(cx), [11..11]);
 4179
 4180        editor.transpose(&Default::default(), cx);
 4181        assert_eq!(editor.text(cx), "🏀🍐✋");
 4182        assert_eq!(editor.selections.ranges(cx), [11..11]);
 4183
 4184        editor
 4185    });
 4186}
 4187
 4188#[gpui::test]
 4189async fn test_rewrap(cx: &mut TestAppContext) {
 4190    init_test(cx, |_| {});
 4191
 4192    let mut cx = EditorTestContext::new(cx).await;
 4193
 4194    let language_with_c_comments = Arc::new(Language::new(
 4195        LanguageConfig {
 4196            line_comments: vec!["// ".into()],
 4197            ..LanguageConfig::default()
 4198        },
 4199        None,
 4200    ));
 4201    let language_with_pound_comments = Arc::new(Language::new(
 4202        LanguageConfig {
 4203            line_comments: vec!["# ".into()],
 4204            ..LanguageConfig::default()
 4205        },
 4206        None,
 4207    ));
 4208    let markdown_language = Arc::new(Language::new(
 4209        LanguageConfig {
 4210            name: "Markdown".into(),
 4211            ..LanguageConfig::default()
 4212        },
 4213        None,
 4214    ));
 4215    let language_with_doc_comments = Arc::new(Language::new(
 4216        LanguageConfig {
 4217            line_comments: vec!["// ".into(), "/// ".into()],
 4218            ..LanguageConfig::default()
 4219        },
 4220        Some(tree_sitter_rust::LANGUAGE.into()),
 4221    ));
 4222
 4223    let plaintext_language = Arc::new(Language::new(
 4224        LanguageConfig {
 4225            name: "Plain Text".into(),
 4226            ..LanguageConfig::default()
 4227        },
 4228        None,
 4229    ));
 4230
 4231    assert_rewrap(
 4232        indoc! {"
 4233            // 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.
 4234        "},
 4235        indoc! {"
 4236            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4237            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4238            // auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam
 4239            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4240            // Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed
 4241            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4242            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4243            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4244            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4245            // porttitor id. Aliquam id accumsan eros.
 4246        "},
 4247        language_with_c_comments.clone(),
 4248        &mut cx,
 4249    );
 4250
 4251    // Test that rewrapping works inside of a selection
 4252    assert_rewrap(
 4253        indoc! {"
 4254            «// 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»
 4255        "},
 4256        indoc! {"
 4257            «// Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4258            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4259            // auctor, eu lacinia sapien scelerisque. Vivamus sit amet neque et quam
 4260            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4261            // Pellentesque odio lectus, iaculis ac volutpat et, blandit quis urna. Sed
 4262            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4263            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4264            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4265            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4266            // porttitor id. Aliquam id accumsan eros.ˇ»
 4267        "},
 4268        language_with_c_comments.clone(),
 4269        &mut cx,
 4270    );
 4271
 4272    // Test that cursors that expand to the same region are collapsed.
 4273    assert_rewrap(
 4274        indoc! {"
 4275            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit.
 4276            // ˇVivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque.
 4277            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4278            // 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.
 4279        "},
 4280        indoc! {"
 4281            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. ˇVivamus mollis elit
 4282            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4283            // auctor, eu lacinia sapien scelerisque. ˇVivamus sit amet neque et quam
 4284            // tincidunt hendrerit. Praesent semper egestas tellus id dignissim.
 4285            // Pellentesque odio lectus, iaculis ac volutpat et, ˇblandit quis urna. Sed
 4286            // vestibulum nisi sit amet nisl venenatis tempus. Donec molestie blandit quam,
 4287            // et porta nunc laoreet in. Integer sit amet scelerisque nisi. Lorem ipsum
 4288            // dolor sit amet, consectetur adipiscing elit. Cras egestas porta metus, eu
 4289            // viverra ipsum efficitur quis. Donec luctus eros turpis, id vulputate turpis
 4290            // porttitor id. Aliquam id accumsan eros.
 4291        "},
 4292        language_with_c_comments.clone(),
 4293        &mut cx,
 4294    );
 4295
 4296    // Test that non-contiguous selections are treated separately.
 4297    assert_rewrap(
 4298        indoc! {"
 4299            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit.
 4300            // ˇVivamus mollis elit purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor, eu lacinia sapien scelerisque.
 4301            //
 4302            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4303            // 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.
 4304        "},
 4305        indoc! {"
 4306            // ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. ˇVivamus mollis elit
 4307            // purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus
 4308            // auctor, eu lacinia sapien scelerisque.
 4309            //
 4310            // ˇVivamus sit amet neque et quam tincidunt hendrerit. Praesent semper egestas
 4311            // tellus id dignissim. Pellentesque odio lectus, iaculis ac volutpat et,
 4312            // ˇblandit quis urna. Sed vestibulum nisi sit amet nisl venenatis tempus. Donec
 4313            // molestie blandit quam, et porta nunc laoreet in. Integer sit amet scelerisque
 4314            // nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras egestas
 4315            // porta metus, eu viverra ipsum efficitur quis. Donec luctus eros turpis, id
 4316            // vulputate turpis porttitor id. Aliquam id accumsan eros.
 4317        "},
 4318        language_with_c_comments.clone(),
 4319        &mut cx,
 4320    );
 4321
 4322    // Test that different comment prefixes are supported.
 4323    assert_rewrap(
 4324        indoc! {"
 4325            # 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.
 4326        "},
 4327        indoc! {"
 4328            # ˇLorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit
 4329            # purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4330            # eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4331            # hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4332            # lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit
 4333            # amet nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet
 4334            # in. Integer sit amet scelerisque nisi. Lorem ipsum dolor sit amet, consectetur
 4335            # adipiscing elit. Cras egestas porta metus, eu viverra ipsum efficitur quis.
 4336            # Donec luctus eros turpis, id vulputate turpis porttitor id. Aliquam id
 4337            # accumsan eros.
 4338        "},
 4339        language_with_pound_comments.clone(),
 4340        &mut cx,
 4341    );
 4342
 4343    // Test that rewrapping is ignored outside of comments in most languages.
 4344    assert_rewrap(
 4345        indoc! {"
 4346            /// Adds two numbers.
 4347            /// Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.ˇ
 4348            fn add(a: u32, b: u32) -> u32 {
 4349                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
 4350            }
 4351        "},
 4352        indoc! {"
 4353            /// Adds two numbers. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 4354            /// Vivamus mollis elit purus, a ornare lacus gravida vitae.ˇ
 4355            fn add(a: u32, b: u32) -> u32 {
 4356                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
 4357            }
 4358        "},
 4359        language_with_doc_comments.clone(),
 4360        &mut cx,
 4361    );
 4362
 4363    // Test that rewrapping works in Markdown and Plain Text languages.
 4364    assert_rewrap(
 4365        indoc! {"
 4366            # Hello
 4367
 4368            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.
 4369        "},
 4370        indoc! {"
 4371            # Hello
 4372
 4373            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit
 4374            purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4375            eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4376            hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4377            lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet
 4378            nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in.
 4379            Integer sit amet scelerisque nisi.
 4380        "},
 4381        markdown_language,
 4382        &mut cx,
 4383    );
 4384
 4385    assert_rewrap(
 4386        indoc! {"
 4387            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.
 4388        "},
 4389        indoc! {"
 4390            Lorem ipsum dolor sit amet, ˇconsectetur adipiscing elit. Vivamus mollis elit
 4391            purus, a ornare lacus gravida vitae. Proin consectetur felis vel purus auctor,
 4392            eu lacinia sapien scelerisque. Vivamus sit amet neque et quam tincidunt
 4393            hendrerit. Praesent semper egestas tellus id dignissim. Pellentesque odio
 4394            lectus, iaculis ac volutpat et, blandit quis urna. Sed vestibulum nisi sit amet
 4395            nisl venenatis tempus. Donec molestie blandit quam, et porta nunc laoreet in.
 4396            Integer sit amet scelerisque nisi.
 4397        "},
 4398        plaintext_language,
 4399        &mut cx,
 4400    );
 4401
 4402    // Test rewrapping unaligned comments in a selection.
 4403    assert_rewrap(
 4404        indoc! {"
 4405            fn foo() {
 4406                if true {
 4407            «        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.
 4408            // Praesent semper egestas tellus id dignissim.ˇ»
 4409                    do_something();
 4410                } else {
 4411                    //
 4412                }
 4413            }
 4414        "},
 4415        indoc! {"
 4416            fn foo() {
 4417                if true {
 4418            «        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus
 4419                    // mollis elit purus, a ornare lacus gravida vitae. Praesent semper
 4420                    // egestas tellus id dignissim.ˇ»
 4421                    do_something();
 4422                } else {
 4423                    //
 4424                }
 4425            }
 4426        "},
 4427        language_with_doc_comments.clone(),
 4428        &mut cx,
 4429    );
 4430
 4431    assert_rewrap(
 4432        indoc! {"
 4433            fn foo() {
 4434                if true {
 4435            «ˇ        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus mollis elit purus, a ornare lacus gravida vitae.
 4436            // Praesent semper egestas tellus id dignissim.»
 4437                    do_something();
 4438                } else {
 4439                    //
 4440                }
 4441
 4442            }
 4443        "},
 4444        indoc! {"
 4445            fn foo() {
 4446                if true {
 4447            «ˇ        // Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus
 4448                    // mollis elit purus, a ornare lacus gravida vitae. Praesent semper
 4449                    // egestas tellus id dignissim.»
 4450                    do_something();
 4451                } else {
 4452                    //
 4453                }
 4454
 4455            }
 4456        "},
 4457        language_with_doc_comments.clone(),
 4458        &mut cx,
 4459    );
 4460
 4461    #[track_caller]
 4462    fn assert_rewrap(
 4463        unwrapped_text: &str,
 4464        wrapped_text: &str,
 4465        language: Arc<Language>,
 4466        cx: &mut EditorTestContext,
 4467    ) {
 4468        cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 4469        cx.set_state(unwrapped_text);
 4470        cx.update_editor(|e, cx| e.rewrap(&Rewrap, cx));
 4471        cx.assert_editor_state(wrapped_text);
 4472    }
 4473}
 4474
 4475#[gpui::test]
 4476async fn test_clipboard(cx: &mut gpui::TestAppContext) {
 4477    init_test(cx, |_| {});
 4478
 4479    let mut cx = EditorTestContext::new(cx).await;
 4480
 4481    cx.set_state("«one✅ ˇ»two «three ˇ»four «five ˇ»six ");
 4482    cx.update_editor(|e, cx| e.cut(&Cut, cx));
 4483    cx.assert_editor_state("ˇtwo ˇfour ˇsix ");
 4484
 4485    // Paste with three cursors. Each cursor pastes one slice of the clipboard text.
 4486    cx.set_state("two ˇfour ˇsix ˇ");
 4487    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4488    cx.assert_editor_state("two one✅ ˇfour three ˇsix five ˇ");
 4489
 4490    // Paste again but with only two cursors. Since the number of cursors doesn't
 4491    // match the number of slices in the clipboard, the entire clipboard text
 4492    // is pasted at each cursor.
 4493    cx.set_state("ˇtwo one✅ four three six five ˇ");
 4494    cx.update_editor(|e, cx| {
 4495        e.handle_input("( ", cx);
 4496        e.paste(&Paste, cx);
 4497        e.handle_input(") ", cx);
 4498    });
 4499    cx.assert_editor_state(
 4500        &([
 4501            "( one✅ ",
 4502            "three ",
 4503            "five ) ˇtwo one✅ four three six five ( one✅ ",
 4504            "three ",
 4505            "five ) ˇ",
 4506        ]
 4507        .join("\n")),
 4508    );
 4509
 4510    // Cut with three selections, one of which is full-line.
 4511    cx.set_state(indoc! {"
 4512        1«2ˇ»3
 4513        4ˇ567
 4514        «8ˇ»9"});
 4515    cx.update_editor(|e, cx| e.cut(&Cut, cx));
 4516    cx.assert_editor_state(indoc! {"
 4517        1ˇ3
 4518        ˇ9"});
 4519
 4520    // Paste with three selections, noticing how the copied selection that was full-line
 4521    // gets inserted before the second cursor.
 4522    cx.set_state(indoc! {"
 4523        1ˇ3
 4524 4525        «oˇ»ne"});
 4526    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4527    cx.assert_editor_state(indoc! {"
 4528        12ˇ3
 4529        4567
 4530 4531        8ˇne"});
 4532
 4533    // Copy with a single cursor only, which writes the whole line into the clipboard.
 4534    cx.set_state(indoc! {"
 4535        The quick brown
 4536        fox juˇmps over
 4537        the lazy dog"});
 4538    cx.update_editor(|e, cx| e.copy(&Copy, cx));
 4539    assert_eq!(
 4540        cx.read_from_clipboard()
 4541            .and_then(|item| item.text().as_deref().map(str::to_string)),
 4542        Some("fox jumps over\n".to_string())
 4543    );
 4544
 4545    // Paste with three selections, noticing how the copied full-line selection is inserted
 4546    // before the empty selections but replaces the selection that is non-empty.
 4547    cx.set_state(indoc! {"
 4548        Tˇhe quick brown
 4549        «foˇ»x jumps over
 4550        tˇhe lazy dog"});
 4551    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4552    cx.assert_editor_state(indoc! {"
 4553        fox jumps over
 4554        Tˇhe quick brown
 4555        fox jumps over
 4556        ˇx jumps over
 4557        fox jumps over
 4558        tˇhe lazy dog"});
 4559}
 4560
 4561#[gpui::test]
 4562async fn test_paste_multiline(cx: &mut gpui::TestAppContext) {
 4563    init_test(cx, |_| {});
 4564
 4565    let mut cx = EditorTestContext::new(cx).await;
 4566    let language = Arc::new(Language::new(
 4567        LanguageConfig::default(),
 4568        Some(tree_sitter_rust::LANGUAGE.into()),
 4569    ));
 4570    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 4571
 4572    // Cut an indented block, without the leading whitespace.
 4573    cx.set_state(indoc! {"
 4574        const a: B = (
 4575            c(),
 4576            «d(
 4577                e,
 4578                f
 4579            )ˇ»
 4580        );
 4581    "});
 4582    cx.update_editor(|e, cx| e.cut(&Cut, cx));
 4583    cx.assert_editor_state(indoc! {"
 4584        const a: B = (
 4585            c(),
 4586            ˇ
 4587        );
 4588    "});
 4589
 4590    // Paste it at the same position.
 4591    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4592    cx.assert_editor_state(indoc! {"
 4593        const a: B = (
 4594            c(),
 4595            d(
 4596                e,
 4597                f
 4598 4599        );
 4600    "});
 4601
 4602    // Paste it at a line with a lower indent level.
 4603    cx.set_state(indoc! {"
 4604        ˇ
 4605        const a: B = (
 4606            c(),
 4607        );
 4608    "});
 4609    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4610    cx.assert_editor_state(indoc! {"
 4611        d(
 4612            e,
 4613            f
 4614 4615        const a: B = (
 4616            c(),
 4617        );
 4618    "});
 4619
 4620    // Cut an indented block, with the leading whitespace.
 4621    cx.set_state(indoc! {"
 4622        const a: B = (
 4623            c(),
 4624        «    d(
 4625                e,
 4626                f
 4627            )
 4628        ˇ»);
 4629    "});
 4630    cx.update_editor(|e, cx| e.cut(&Cut, cx));
 4631    cx.assert_editor_state(indoc! {"
 4632        const a: B = (
 4633            c(),
 4634        ˇ);
 4635    "});
 4636
 4637    // Paste it at the same position.
 4638    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4639    cx.assert_editor_state(indoc! {"
 4640        const a: B = (
 4641            c(),
 4642            d(
 4643                e,
 4644                f
 4645            )
 4646        ˇ);
 4647    "});
 4648
 4649    // Paste it at a line with a higher indent level.
 4650    cx.set_state(indoc! {"
 4651        const a: B = (
 4652            c(),
 4653            d(
 4654                e,
 4655 4656            )
 4657        );
 4658    "});
 4659    cx.update_editor(|e, cx| e.paste(&Paste, cx));
 4660    cx.assert_editor_state(indoc! {"
 4661        const a: B = (
 4662            c(),
 4663            d(
 4664                e,
 4665                f    d(
 4666                    e,
 4667                    f
 4668                )
 4669        ˇ
 4670            )
 4671        );
 4672    "});
 4673}
 4674
 4675#[gpui::test]
 4676fn test_select_all(cx: &mut TestAppContext) {
 4677    init_test(cx, |_| {});
 4678
 4679    let view = cx.add_window(|cx| {
 4680        let buffer = MultiBuffer::build_simple("abc\nde\nfgh", cx);
 4681        build_editor(buffer, cx)
 4682    });
 4683    _ = view.update(cx, |view, cx| {
 4684        view.select_all(&SelectAll, cx);
 4685        assert_eq!(
 4686            view.selections.display_ranges(cx),
 4687            &[DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(2), 3)]
 4688        );
 4689    });
 4690}
 4691
 4692#[gpui::test]
 4693fn test_select_line(cx: &mut TestAppContext) {
 4694    init_test(cx, |_| {});
 4695
 4696    let view = cx.add_window(|cx| {
 4697        let buffer = MultiBuffer::build_simple(&sample_text(6, 5, 'a'), cx);
 4698        build_editor(buffer, cx)
 4699    });
 4700    _ = view.update(cx, |view, cx| {
 4701        view.change_selections(None, cx, |s| {
 4702            s.select_display_ranges([
 4703                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 4704                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4705                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 4706                DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(4), 2),
 4707            ])
 4708        });
 4709        view.select_line(&SelectLine, cx);
 4710        assert_eq!(
 4711            view.selections.display_ranges(cx),
 4712            vec![
 4713                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(2), 0),
 4714                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(5), 0),
 4715            ]
 4716        );
 4717    });
 4718
 4719    _ = view.update(cx, |view, cx| {
 4720        view.select_line(&SelectLine, cx);
 4721        assert_eq!(
 4722            view.selections.display_ranges(cx),
 4723            vec![
 4724                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(3), 0),
 4725                DisplayPoint::new(DisplayRow(4), 0)..DisplayPoint::new(DisplayRow(5), 5),
 4726            ]
 4727        );
 4728    });
 4729
 4730    _ = view.update(cx, |view, cx| {
 4731        view.select_line(&SelectLine, cx);
 4732        assert_eq!(
 4733            view.selections.display_ranges(cx),
 4734            vec![DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(5), 5)]
 4735        );
 4736    });
 4737}
 4738
 4739#[gpui::test]
 4740fn test_split_selection_into_lines(cx: &mut TestAppContext) {
 4741    init_test(cx, |_| {});
 4742
 4743    let view = cx.add_window(|cx| {
 4744        let buffer = MultiBuffer::build_simple(&sample_text(9, 5, 'a'), cx);
 4745        build_editor(buffer, cx)
 4746    });
 4747    _ = view.update(cx, |view, cx| {
 4748        view.fold_creases(
 4749            vec![
 4750                Crease::simple(Point::new(0, 2)..Point::new(1, 2), FoldPlaceholder::test()),
 4751                Crease::simple(Point::new(2, 3)..Point::new(4, 1), FoldPlaceholder::test()),
 4752                Crease::simple(Point::new(7, 0)..Point::new(8, 4), FoldPlaceholder::test()),
 4753            ],
 4754            true,
 4755            cx,
 4756        );
 4757        view.change_selections(None, cx, |s| {
 4758            s.select_display_ranges([
 4759                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 4760                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4761                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 0),
 4762                DisplayPoint::new(DisplayRow(4), 4)..DisplayPoint::new(DisplayRow(4), 4),
 4763            ])
 4764        });
 4765        assert_eq!(view.display_text(cx), "aa⋯bbb\nccc⋯eeee\nfffff\nggggg\n⋯i");
 4766    });
 4767
 4768    _ = view.update(cx, |view, cx| {
 4769        view.split_selection_into_lines(&SplitSelectionIntoLines, cx);
 4770        assert_eq!(
 4771            view.display_text(cx),
 4772            "aaaaa\nbbbbb\nccc⋯eeee\nfffff\nggggg\n⋯i"
 4773        );
 4774        assert_eq!(
 4775            view.selections.display_ranges(cx),
 4776            [
 4777                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 4778                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 2),
 4779                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 0),
 4780                DisplayPoint::new(DisplayRow(5), 4)..DisplayPoint::new(DisplayRow(5), 4)
 4781            ]
 4782        );
 4783    });
 4784
 4785    _ = view.update(cx, |view, cx| {
 4786        view.change_selections(None, cx, |s| {
 4787            s.select_display_ranges([
 4788                DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 1)
 4789            ])
 4790        });
 4791        view.split_selection_into_lines(&SplitSelectionIntoLines, cx);
 4792        assert_eq!(
 4793            view.display_text(cx),
 4794            "aaaaa\nbbbbb\nccccc\nddddd\neeeee\nfffff\nggggg\nhhhhh\niiiii"
 4795        );
 4796        assert_eq!(
 4797            view.selections.display_ranges(cx),
 4798            [
 4799                DisplayPoint::new(DisplayRow(0), 5)..DisplayPoint::new(DisplayRow(0), 5),
 4800                DisplayPoint::new(DisplayRow(1), 5)..DisplayPoint::new(DisplayRow(1), 5),
 4801                DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),
 4802                DisplayPoint::new(DisplayRow(3), 5)..DisplayPoint::new(DisplayRow(3), 5),
 4803                DisplayPoint::new(DisplayRow(4), 5)..DisplayPoint::new(DisplayRow(4), 5),
 4804                DisplayPoint::new(DisplayRow(5), 5)..DisplayPoint::new(DisplayRow(5), 5),
 4805                DisplayPoint::new(DisplayRow(6), 5)..DisplayPoint::new(DisplayRow(6), 5),
 4806                DisplayPoint::new(DisplayRow(7), 0)..DisplayPoint::new(DisplayRow(7), 0)
 4807            ]
 4808        );
 4809    });
 4810}
 4811
 4812#[gpui::test]
 4813async fn test_add_selection_above_below(cx: &mut TestAppContext) {
 4814    init_test(cx, |_| {});
 4815
 4816    let mut cx = EditorTestContext::new(cx).await;
 4817
 4818    // let buffer = MultiBuffer::build_simple("abc\ndefghi\n\njk\nlmno\n", cx);
 4819    cx.set_state(indoc!(
 4820        r#"abc
 4821           defˇghi
 4822
 4823           jk
 4824           nlmo
 4825           "#
 4826    ));
 4827
 4828    cx.update_editor(|editor, cx| {
 4829        editor.add_selection_above(&Default::default(), cx);
 4830    });
 4831
 4832    cx.assert_editor_state(indoc!(
 4833        r#"abcˇ
 4834           defˇghi
 4835
 4836           jk
 4837           nlmo
 4838           "#
 4839    ));
 4840
 4841    cx.update_editor(|editor, cx| {
 4842        editor.add_selection_above(&Default::default(), cx);
 4843    });
 4844
 4845    cx.assert_editor_state(indoc!(
 4846        r#"abcˇ
 4847            defˇghi
 4848
 4849            jk
 4850            nlmo
 4851            "#
 4852    ));
 4853
 4854    cx.update_editor(|view, cx| {
 4855        view.add_selection_below(&Default::default(), cx);
 4856    });
 4857
 4858    cx.assert_editor_state(indoc!(
 4859        r#"abc
 4860           defˇghi
 4861
 4862           jk
 4863           nlmo
 4864           "#
 4865    ));
 4866
 4867    cx.update_editor(|view, cx| {
 4868        view.undo_selection(&Default::default(), cx);
 4869    });
 4870
 4871    cx.assert_editor_state(indoc!(
 4872        r#"abcˇ
 4873           defˇghi
 4874
 4875           jk
 4876           nlmo
 4877           "#
 4878    ));
 4879
 4880    cx.update_editor(|view, cx| {
 4881        view.redo_selection(&Default::default(), cx);
 4882    });
 4883
 4884    cx.assert_editor_state(indoc!(
 4885        r#"abc
 4886           defˇghi
 4887
 4888           jk
 4889           nlmo
 4890           "#
 4891    ));
 4892
 4893    cx.update_editor(|view, cx| {
 4894        view.add_selection_below(&Default::default(), cx);
 4895    });
 4896
 4897    cx.assert_editor_state(indoc!(
 4898        r#"abc
 4899           defˇghi
 4900
 4901           jk
 4902           nlmˇo
 4903           "#
 4904    ));
 4905
 4906    cx.update_editor(|view, cx| {
 4907        view.add_selection_below(&Default::default(), cx);
 4908    });
 4909
 4910    cx.assert_editor_state(indoc!(
 4911        r#"abc
 4912           defˇghi
 4913
 4914           jk
 4915           nlmˇo
 4916           "#
 4917    ));
 4918
 4919    // change selections
 4920    cx.set_state(indoc!(
 4921        r#"abc
 4922           def«ˇg»hi
 4923
 4924           jk
 4925           nlmo
 4926           "#
 4927    ));
 4928
 4929    cx.update_editor(|view, cx| {
 4930        view.add_selection_below(&Default::default(), cx);
 4931    });
 4932
 4933    cx.assert_editor_state(indoc!(
 4934        r#"abc
 4935           def«ˇg»hi
 4936
 4937           jk
 4938           nlm«ˇo»
 4939           "#
 4940    ));
 4941
 4942    cx.update_editor(|view, cx| {
 4943        view.add_selection_below(&Default::default(), cx);
 4944    });
 4945
 4946    cx.assert_editor_state(indoc!(
 4947        r#"abc
 4948           def«ˇg»hi
 4949
 4950           jk
 4951           nlm«ˇo»
 4952           "#
 4953    ));
 4954
 4955    cx.update_editor(|view, cx| {
 4956        view.add_selection_above(&Default::default(), cx);
 4957    });
 4958
 4959    cx.assert_editor_state(indoc!(
 4960        r#"abc
 4961           def«ˇg»hi
 4962
 4963           jk
 4964           nlmo
 4965           "#
 4966    ));
 4967
 4968    cx.update_editor(|view, cx| {
 4969        view.add_selection_above(&Default::default(), cx);
 4970    });
 4971
 4972    cx.assert_editor_state(indoc!(
 4973        r#"abc
 4974           def«ˇg»hi
 4975
 4976           jk
 4977           nlmo
 4978           "#
 4979    ));
 4980
 4981    // Change selections again
 4982    cx.set_state(indoc!(
 4983        r#"a«bc
 4984           defgˇ»hi
 4985
 4986           jk
 4987           nlmo
 4988           "#
 4989    ));
 4990
 4991    cx.update_editor(|view, cx| {
 4992        view.add_selection_below(&Default::default(), cx);
 4993    });
 4994
 4995    cx.assert_editor_state(indoc!(
 4996        r#"a«bcˇ»
 4997           d«efgˇ»hi
 4998
 4999           j«kˇ»
 5000           nlmo
 5001           "#
 5002    ));
 5003
 5004    cx.update_editor(|view, cx| {
 5005        view.add_selection_below(&Default::default(), cx);
 5006    });
 5007    cx.assert_editor_state(indoc!(
 5008        r#"a«bcˇ»
 5009           d«efgˇ»hi
 5010
 5011           j«kˇ»
 5012           n«lmoˇ»
 5013           "#
 5014    ));
 5015    cx.update_editor(|view, cx| {
 5016        view.add_selection_above(&Default::default(), cx);
 5017    });
 5018
 5019    cx.assert_editor_state(indoc!(
 5020        r#"a«bcˇ»
 5021           d«efgˇ»hi
 5022
 5023           j«kˇ»
 5024           nlmo
 5025           "#
 5026    ));
 5027
 5028    // Change selections again
 5029    cx.set_state(indoc!(
 5030        r#"abc
 5031           d«ˇefghi
 5032
 5033           jk
 5034           nlm»o
 5035           "#
 5036    ));
 5037
 5038    cx.update_editor(|view, cx| {
 5039        view.add_selection_above(&Default::default(), cx);
 5040    });
 5041
 5042    cx.assert_editor_state(indoc!(
 5043        r#"a«ˇbc»
 5044           d«ˇef»ghi
 5045
 5046           j«ˇk»
 5047           n«ˇlm»o
 5048           "#
 5049    ));
 5050
 5051    cx.update_editor(|view, cx| {
 5052        view.add_selection_below(&Default::default(), cx);
 5053    });
 5054
 5055    cx.assert_editor_state(indoc!(
 5056        r#"abc
 5057           d«ˇef»ghi
 5058
 5059           j«ˇk»
 5060           n«ˇlm»o
 5061           "#
 5062    ));
 5063}
 5064
 5065#[gpui::test]
 5066async fn test_select_next(cx: &mut gpui::TestAppContext) {
 5067    init_test(cx, |_| {});
 5068
 5069    let mut cx = EditorTestContext::new(cx).await;
 5070    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 5071
 5072    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5073        .unwrap();
 5074    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5075
 5076    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5077        .unwrap();
 5078    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\nabc");
 5079
 5080    cx.update_editor(|view, cx| view.undo_selection(&UndoSelection, cx));
 5081    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5082
 5083    cx.update_editor(|view, cx| view.redo_selection(&RedoSelection, cx));
 5084    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\nabc");
 5085
 5086    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5087        .unwrap();
 5088    cx.assert_editor_state("abc\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5089
 5090    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5091        .unwrap();
 5092    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5093}
 5094
 5095#[gpui::test]
 5096async fn test_select_all_matches(cx: &mut gpui::TestAppContext) {
 5097    init_test(cx, |_| {});
 5098
 5099    let mut cx = EditorTestContext::new(cx).await;
 5100    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 5101
 5102    cx.update_editor(|e, cx| e.select_all_matches(&SelectAllMatches, cx))
 5103        .unwrap();
 5104    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndefabc\n«abcˇ»");
 5105}
 5106
 5107#[gpui::test]
 5108async fn test_select_next_with_multiple_carets(cx: &mut gpui::TestAppContext) {
 5109    init_test(cx, |_| {});
 5110
 5111    let mut cx = EditorTestContext::new(cx).await;
 5112    cx.set_state(
 5113        r#"let foo = 2;
 5114lˇet foo = 2;
 5115let fooˇ = 2;
 5116let foo = 2;
 5117let foo = ˇ2;"#,
 5118    );
 5119
 5120    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5121        .unwrap();
 5122    cx.assert_editor_state(
 5123        r#"let foo = 2;
 5124«letˇ» foo = 2;
 5125let «fooˇ» = 2;
 5126let foo = 2;
 5127let foo = «2ˇ»;"#,
 5128    );
 5129
 5130    // noop for multiple selections with different contents
 5131    cx.update_editor(|e, cx| e.select_next(&SelectNext::default(), cx))
 5132        .unwrap();
 5133    cx.assert_editor_state(
 5134        r#"let foo = 2;
 5135«letˇ» foo = 2;
 5136let «fooˇ» = 2;
 5137let foo = 2;
 5138let foo = «2ˇ»;"#,
 5139    );
 5140}
 5141
 5142#[gpui::test]
 5143async fn test_select_previous_multibuffer(cx: &mut gpui::TestAppContext) {
 5144    init_test(cx, |_| {});
 5145
 5146    let mut cx =
 5147        EditorTestContext::new_multibuffer(cx, ["aaa\n«bbb\nccc\n»ddd", "aaa\n«bbb\nccc\n»ddd"]);
 5148
 5149    cx.assert_editor_state(indoc! {"
 5150        ˇbbb
 5151        ccc
 5152
 5153        bbb
 5154        ccc
 5155        "});
 5156    cx.dispatch_action(SelectPrevious::default());
 5157    cx.assert_editor_state(indoc! {"
 5158                «bbbˇ»
 5159                ccc
 5160
 5161                bbb
 5162                ccc
 5163                "});
 5164    cx.dispatch_action(SelectPrevious::default());
 5165    cx.assert_editor_state(indoc! {"
 5166                «bbbˇ»
 5167                ccc
 5168
 5169                «bbbˇ»
 5170                ccc
 5171                "});
 5172}
 5173
 5174#[gpui::test]
 5175async fn test_select_previous_with_single_caret(cx: &mut gpui::TestAppContext) {
 5176    init_test(cx, |_| {});
 5177
 5178    let mut cx = EditorTestContext::new(cx).await;
 5179    cx.set_state("abc\nˇabc abc\ndefabc\nabc");
 5180
 5181    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5182        .unwrap();
 5183    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5184
 5185    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5186        .unwrap();
 5187    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\nabc");
 5188
 5189    cx.update_editor(|view, cx| view.undo_selection(&UndoSelection, cx));
 5190    cx.assert_editor_state("abc\n«abcˇ» abc\ndefabc\nabc");
 5191
 5192    cx.update_editor(|view, cx| view.redo_selection(&RedoSelection, cx));
 5193    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\nabc");
 5194
 5195    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5196        .unwrap();
 5197    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndefabc\n«abcˇ»");
 5198
 5199    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5200        .unwrap();
 5201    cx.assert_editor_state("«abcˇ»\n«abcˇ» abc\ndef«abcˇ»\n«abcˇ»");
 5202
 5203    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5204        .unwrap();
 5205    cx.assert_editor_state("«abcˇ»\n«abcˇ» «abcˇ»\ndef«abcˇ»\n«abcˇ»");
 5206}
 5207
 5208#[gpui::test]
 5209async fn test_select_previous_with_multiple_carets(cx: &mut gpui::TestAppContext) {
 5210    init_test(cx, |_| {});
 5211
 5212    let mut cx = EditorTestContext::new(cx).await;
 5213    cx.set_state(
 5214        r#"let foo = 2;
 5215lˇet foo = 2;
 5216let fooˇ = 2;
 5217let foo = 2;
 5218let foo = ˇ2;"#,
 5219    );
 5220
 5221    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5222        .unwrap();
 5223    cx.assert_editor_state(
 5224        r#"let foo = 2;
 5225«letˇ» foo = 2;
 5226let «fooˇ» = 2;
 5227let foo = 2;
 5228let foo = «2ˇ»;"#,
 5229    );
 5230
 5231    // noop for multiple selections with different contents
 5232    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5233        .unwrap();
 5234    cx.assert_editor_state(
 5235        r#"let foo = 2;
 5236«letˇ» foo = 2;
 5237let «fooˇ» = 2;
 5238let foo = 2;
 5239let foo = «2ˇ»;"#,
 5240    );
 5241}
 5242
 5243#[gpui::test]
 5244async fn test_select_previous_with_single_selection(cx: &mut gpui::TestAppContext) {
 5245    init_test(cx, |_| {});
 5246
 5247    let mut cx = EditorTestContext::new(cx).await;
 5248    cx.set_state("abc\n«ˇabc» abc\ndefabc\nabc");
 5249
 5250    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5251        .unwrap();
 5252    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\nabc");
 5253
 5254    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5255        .unwrap();
 5256    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\n«abcˇ»");
 5257
 5258    cx.update_editor(|view, cx| view.undo_selection(&UndoSelection, cx));
 5259    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\nabc");
 5260
 5261    cx.update_editor(|view, cx| view.redo_selection(&RedoSelection, cx));
 5262    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndefabc\n«abcˇ»");
 5263
 5264    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5265        .unwrap();
 5266    cx.assert_editor_state("«abcˇ»\n«ˇabc» abc\ndef«abcˇ»\n«abcˇ»");
 5267
 5268    cx.update_editor(|e, cx| e.select_previous(&SelectPrevious::default(), cx))
 5269        .unwrap();
 5270    cx.assert_editor_state("«abcˇ»\n«ˇabc» «abcˇ»\ndef«abcˇ»\n«abcˇ»");
 5271}
 5272
 5273#[gpui::test]
 5274async fn test_select_larger_smaller_syntax_node(cx: &mut gpui::TestAppContext) {
 5275    init_test(cx, |_| {});
 5276
 5277    let language = Arc::new(Language::new(
 5278        LanguageConfig::default(),
 5279        Some(tree_sitter_rust::LANGUAGE.into()),
 5280    ));
 5281
 5282    let text = r#"
 5283        use mod1::mod2::{mod3, mod4};
 5284
 5285        fn fn_1(param1: bool, param2: &str) {
 5286            let var1 = "text";
 5287        }
 5288    "#
 5289    .unindent();
 5290
 5291    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
 5292    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 5293    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 5294
 5295    editor
 5296        .condition::<crate::EditorEvent>(cx, |view, cx| !view.buffer.read(cx).is_parsing(cx))
 5297        .await;
 5298
 5299    editor.update(cx, |view, cx| {
 5300        view.change_selections(None, cx, |s| {
 5301            s.select_display_ranges([
 5302                DisplayPoint::new(DisplayRow(0), 25)..DisplayPoint::new(DisplayRow(0), 25),
 5303                DisplayPoint::new(DisplayRow(2), 24)..DisplayPoint::new(DisplayRow(2), 12),
 5304                DisplayPoint::new(DisplayRow(3), 18)..DisplayPoint::new(DisplayRow(3), 18),
 5305            ]);
 5306        });
 5307        view.select_larger_syntax_node(&SelectLargerSyntaxNode, cx);
 5308    });
 5309    editor.update(cx, |editor, cx| {
 5310        assert_text_with_selections(
 5311            editor,
 5312            indoc! {r#"
 5313                use mod1::mod2::{mod3, «mod4ˇ»};
 5314
 5315                fn fn_1«ˇ(param1: bool, param2: &str)» {
 5316                    let var1 = "«textˇ»";
 5317                }
 5318            "#},
 5319            cx,
 5320        );
 5321    });
 5322
 5323    editor.update(cx, |view, cx| {
 5324        view.select_larger_syntax_node(&SelectLargerSyntaxNode, cx);
 5325    });
 5326    editor.update(cx, |editor, cx| {
 5327        assert_text_with_selections(
 5328            editor,
 5329            indoc! {r#"
 5330                use mod1::mod2::«{mod3, mod4}ˇ»;
 5331
 5332                «ˇfn fn_1(param1: bool, param2: &str) {
 5333                    let var1 = "text";
 5334 5335            "#},
 5336            cx,
 5337        );
 5338    });
 5339
 5340    editor.update(cx, |view, cx| {
 5341        view.select_larger_syntax_node(&SelectLargerSyntaxNode, cx);
 5342    });
 5343    assert_eq!(
 5344        editor.update(cx, |view, cx| view.selections.display_ranges(cx)),
 5345        &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 5346    );
 5347
 5348    // Trying to expand the selected syntax node one more time has no effect.
 5349    editor.update(cx, |view, cx| {
 5350        view.select_larger_syntax_node(&SelectLargerSyntaxNode, cx);
 5351    });
 5352    assert_eq!(
 5353        editor.update(cx, |view, cx| view.selections.display_ranges(cx)),
 5354        &[DisplayPoint::new(DisplayRow(5), 0)..DisplayPoint::new(DisplayRow(0), 0)]
 5355    );
 5356
 5357    editor.update(cx, |view, cx| {
 5358        view.select_smaller_syntax_node(&SelectSmallerSyntaxNode, cx);
 5359    });
 5360    editor.update(cx, |editor, cx| {
 5361        assert_text_with_selections(
 5362            editor,
 5363            indoc! {r#"
 5364                use mod1::mod2::«{mod3, mod4}ˇ»;
 5365
 5366                «ˇfn fn_1(param1: bool, param2: &str) {
 5367                    let var1 = "text";
 5368 5369            "#},
 5370            cx,
 5371        );
 5372    });
 5373
 5374    editor.update(cx, |view, cx| {
 5375        view.select_smaller_syntax_node(&SelectSmallerSyntaxNode, cx);
 5376    });
 5377    editor.update(cx, |editor, cx| {
 5378        assert_text_with_selections(
 5379            editor,
 5380            indoc! {r#"
 5381                use mod1::mod2::{mod3, «mod4ˇ»};
 5382
 5383                fn fn_1«ˇ(param1: bool, param2: &str)» {
 5384                    let var1 = "«textˇ»";
 5385                }
 5386            "#},
 5387            cx,
 5388        );
 5389    });
 5390
 5391    editor.update(cx, |view, cx| {
 5392        view.select_smaller_syntax_node(&SelectSmallerSyntaxNode, cx);
 5393    });
 5394    editor.update(cx, |editor, cx| {
 5395        assert_text_with_selections(
 5396            editor,
 5397            indoc! {r#"
 5398                use mod1::mod2::{mod3, mo«ˇ»d4};
 5399
 5400                fn fn_1(para«ˇm1: bool, pa»ram2: &str) {
 5401                    let var1 = "te«ˇ»xt";
 5402                }
 5403            "#},
 5404            cx,
 5405        );
 5406    });
 5407
 5408    // Trying to shrink the selected syntax node one more time has no effect.
 5409    editor.update(cx, |view, cx| {
 5410        view.select_smaller_syntax_node(&SelectSmallerSyntaxNode, cx);
 5411    });
 5412    editor.update(cx, |editor, cx| {
 5413        assert_text_with_selections(
 5414            editor,
 5415            indoc! {r#"
 5416                use mod1::mod2::{mod3, mo«ˇ»d4};
 5417
 5418                fn fn_1(para«ˇm1: bool, pa»ram2: &str) {
 5419                    let var1 = "te«ˇ»xt";
 5420                }
 5421            "#},
 5422            cx,
 5423        );
 5424    });
 5425
 5426    // Ensure that we keep expanding the selection if the larger selection starts or ends within
 5427    // a fold.
 5428    editor.update(cx, |view, cx| {
 5429        view.fold_creases(
 5430            vec![
 5431                Crease::simple(
 5432                    Point::new(0, 21)..Point::new(0, 24),
 5433                    FoldPlaceholder::test(),
 5434                ),
 5435                Crease::simple(
 5436                    Point::new(3, 20)..Point::new(3, 22),
 5437                    FoldPlaceholder::test(),
 5438                ),
 5439            ],
 5440            true,
 5441            cx,
 5442        );
 5443        view.select_larger_syntax_node(&SelectLargerSyntaxNode, cx);
 5444    });
 5445    editor.update(cx, |editor, cx| {
 5446        assert_text_with_selections(
 5447            editor,
 5448            indoc! {r#"
 5449                use mod1::mod2::«{mod3, mod4}ˇ»;
 5450
 5451                fn fn_1«ˇ(param1: bool, param2: &str)» {
 5452                    «let var1 = "text";ˇ»
 5453                }
 5454            "#},
 5455            cx,
 5456        );
 5457    });
 5458}
 5459
 5460#[gpui::test]
 5461async fn test_autoindent(cx: &mut gpui::TestAppContext) {
 5462    init_test(cx, |_| {});
 5463
 5464    let language = Arc::new(
 5465        Language::new(
 5466            LanguageConfig {
 5467                brackets: BracketPairConfig {
 5468                    pairs: vec![
 5469                        BracketPair {
 5470                            start: "{".to_string(),
 5471                            end: "}".to_string(),
 5472                            close: false,
 5473                            surround: false,
 5474                            newline: true,
 5475                        },
 5476                        BracketPair {
 5477                            start: "(".to_string(),
 5478                            end: ")".to_string(),
 5479                            close: false,
 5480                            surround: false,
 5481                            newline: true,
 5482                        },
 5483                    ],
 5484                    ..Default::default()
 5485                },
 5486                ..Default::default()
 5487            },
 5488            Some(tree_sitter_rust::LANGUAGE.into()),
 5489        )
 5490        .with_indents_query(
 5491            r#"
 5492                (_ "(" ")" @end) @indent
 5493                (_ "{" "}" @end) @indent
 5494            "#,
 5495        )
 5496        .unwrap(),
 5497    );
 5498
 5499    let text = "fn a() {}";
 5500
 5501    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
 5502    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 5503    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 5504    editor
 5505        .condition::<crate::EditorEvent>(cx, |editor, cx| !editor.buffer.read(cx).is_parsing(cx))
 5506        .await;
 5507
 5508    editor.update(cx, |editor, cx| {
 5509        editor.change_selections(None, cx, |s| s.select_ranges([5..5, 8..8, 9..9]));
 5510        editor.newline(&Newline, cx);
 5511        assert_eq!(editor.text(cx), "fn a(\n    \n) {\n    \n}\n");
 5512        assert_eq!(
 5513            editor.selections.ranges(cx),
 5514            &[
 5515                Point::new(1, 4)..Point::new(1, 4),
 5516                Point::new(3, 4)..Point::new(3, 4),
 5517                Point::new(5, 0)..Point::new(5, 0)
 5518            ]
 5519        );
 5520    });
 5521}
 5522
 5523#[gpui::test]
 5524async fn test_autoindent_selections(cx: &mut gpui::TestAppContext) {
 5525    init_test(cx, |_| {});
 5526
 5527    {
 5528        let mut cx = EditorLspTestContext::new_rust(Default::default(), cx).await;
 5529        cx.set_state(indoc! {"
 5530            impl A {
 5531
 5532                fn b() {}
 5533
 5534            «fn c() {
 5535
 5536            }ˇ»
 5537            }
 5538        "});
 5539
 5540        cx.update_editor(|editor, cx| {
 5541            editor.autoindent(&Default::default(), cx);
 5542        });
 5543
 5544        cx.assert_editor_state(indoc! {"
 5545            impl A {
 5546
 5547                fn b() {}
 5548
 5549                «fn c() {
 5550
 5551                }ˇ»
 5552            }
 5553        "});
 5554    }
 5555
 5556    {
 5557        let mut cx = EditorTestContext::new_multibuffer(
 5558            cx,
 5559            [indoc! { "
 5560                impl A {
 5561                «
 5562                // a
 5563                fn b(){}
 5564                »
 5565                «
 5566                    }
 5567                    fn c(){}
 5568                »
 5569            "}],
 5570        );
 5571
 5572        let buffer = cx.update_editor(|editor, cx| {
 5573            let buffer = editor.buffer().update(cx, |buffer, _| {
 5574                buffer.all_buffers().iter().next().unwrap().clone()
 5575            });
 5576            buffer.update(cx, |buffer, cx| buffer.set_language(Some(rust_lang()), cx));
 5577            buffer
 5578        });
 5579
 5580        cx.run_until_parked();
 5581        cx.update_editor(|editor, cx| {
 5582            editor.select_all(&Default::default(), cx);
 5583            editor.autoindent(&Default::default(), cx)
 5584        });
 5585        cx.run_until_parked();
 5586
 5587        cx.update(|cx| {
 5588            pretty_assertions::assert_eq!(
 5589                buffer.read(cx).text(),
 5590                indoc! { "
 5591                    impl A {
 5592
 5593                        // a
 5594                        fn b(){}
 5595
 5596
 5597                    }
 5598                    fn c(){}
 5599
 5600                " }
 5601            )
 5602        });
 5603    }
 5604}
 5605
 5606#[gpui::test]
 5607async fn test_autoclose_and_auto_surround_pairs(cx: &mut gpui::TestAppContext) {
 5608    init_test(cx, |_| {});
 5609
 5610    let mut cx = EditorTestContext::new(cx).await;
 5611
 5612    let language = Arc::new(Language::new(
 5613        LanguageConfig {
 5614            brackets: BracketPairConfig {
 5615                pairs: vec![
 5616                    BracketPair {
 5617                        start: "{".to_string(),
 5618                        end: "}".to_string(),
 5619                        close: true,
 5620                        surround: true,
 5621                        newline: true,
 5622                    },
 5623                    BracketPair {
 5624                        start: "(".to_string(),
 5625                        end: ")".to_string(),
 5626                        close: true,
 5627                        surround: true,
 5628                        newline: true,
 5629                    },
 5630                    BracketPair {
 5631                        start: "/*".to_string(),
 5632                        end: " */".to_string(),
 5633                        close: true,
 5634                        surround: true,
 5635                        newline: true,
 5636                    },
 5637                    BracketPair {
 5638                        start: "[".to_string(),
 5639                        end: "]".to_string(),
 5640                        close: false,
 5641                        surround: false,
 5642                        newline: true,
 5643                    },
 5644                    BracketPair {
 5645                        start: "\"".to_string(),
 5646                        end: "\"".to_string(),
 5647                        close: true,
 5648                        surround: true,
 5649                        newline: false,
 5650                    },
 5651                    BracketPair {
 5652                        start: "<".to_string(),
 5653                        end: ">".to_string(),
 5654                        close: false,
 5655                        surround: true,
 5656                        newline: true,
 5657                    },
 5658                ],
 5659                ..Default::default()
 5660            },
 5661            autoclose_before: "})]".to_string(),
 5662            ..Default::default()
 5663        },
 5664        Some(tree_sitter_rust::LANGUAGE.into()),
 5665    ));
 5666
 5667    cx.language_registry().add(language.clone());
 5668    cx.update_buffer(|buffer, cx| {
 5669        buffer.set_language(Some(language), cx);
 5670    });
 5671
 5672    cx.set_state(
 5673        &r#"
 5674            🏀ˇ
 5675            εˇ
 5676            ❤️ˇ
 5677        "#
 5678        .unindent(),
 5679    );
 5680
 5681    // autoclose multiple nested brackets at multiple cursors
 5682    cx.update_editor(|view, cx| {
 5683        view.handle_input("{", cx);
 5684        view.handle_input("{", cx);
 5685        view.handle_input("{", cx);
 5686    });
 5687    cx.assert_editor_state(
 5688        &"
 5689            🏀{{{ˇ}}}
 5690            ε{{{ˇ}}}
 5691            ❤️{{{ˇ}}}
 5692        "
 5693        .unindent(),
 5694    );
 5695
 5696    // insert a different closing bracket
 5697    cx.update_editor(|view, cx| {
 5698        view.handle_input(")", cx);
 5699    });
 5700    cx.assert_editor_state(
 5701        &"
 5702            🏀{{{)ˇ}}}
 5703            ε{{{)ˇ}}}
 5704            ❤️{{{)ˇ}}}
 5705        "
 5706        .unindent(),
 5707    );
 5708
 5709    // skip over the auto-closed brackets when typing a closing bracket
 5710    cx.update_editor(|view, cx| {
 5711        view.move_right(&MoveRight, cx);
 5712        view.handle_input("}", cx);
 5713        view.handle_input("}", cx);
 5714        view.handle_input("}", cx);
 5715    });
 5716    cx.assert_editor_state(
 5717        &"
 5718            🏀{{{)}}}}ˇ
 5719            ε{{{)}}}}ˇ
 5720            ❤️{{{)}}}}ˇ
 5721        "
 5722        .unindent(),
 5723    );
 5724
 5725    // autoclose multi-character pairs
 5726    cx.set_state(
 5727        &"
 5728            ˇ
 5729            ˇ
 5730        "
 5731        .unindent(),
 5732    );
 5733    cx.update_editor(|view, cx| {
 5734        view.handle_input("/", cx);
 5735        view.handle_input("*", cx);
 5736    });
 5737    cx.assert_editor_state(
 5738        &"
 5739            /*ˇ */
 5740            /*ˇ */
 5741        "
 5742        .unindent(),
 5743    );
 5744
 5745    // one cursor autocloses a multi-character pair, one cursor
 5746    // does not autoclose.
 5747    cx.set_state(
 5748        &"
 5749 5750            ˇ
 5751        "
 5752        .unindent(),
 5753    );
 5754    cx.update_editor(|view, cx| view.handle_input("*", cx));
 5755    cx.assert_editor_state(
 5756        &"
 5757            /*ˇ */
 5758 5759        "
 5760        .unindent(),
 5761    );
 5762
 5763    // Don't autoclose if the next character isn't whitespace and isn't
 5764    // listed in the language's "autoclose_before" section.
 5765    cx.set_state("ˇa b");
 5766    cx.update_editor(|view, cx| view.handle_input("{", cx));
 5767    cx.assert_editor_state("{ˇa b");
 5768
 5769    // Don't autoclose if `close` is false for the bracket pair
 5770    cx.set_state("ˇ");
 5771    cx.update_editor(|view, cx| view.handle_input("[", cx));
 5772    cx.assert_editor_state("");
 5773
 5774    // Surround with brackets if text is selected
 5775    cx.set_state("«aˇ» b");
 5776    cx.update_editor(|view, cx| view.handle_input("{", cx));
 5777    cx.assert_editor_state("{«aˇ»} b");
 5778
 5779    // Autclose pair where the start and end characters are the same
 5780    cx.set_state("");
 5781    cx.update_editor(|view, cx| view.handle_input("\"", cx));
 5782    cx.assert_editor_state("a\"ˇ\"");
 5783    cx.update_editor(|view, cx| view.handle_input("\"", cx));
 5784    cx.assert_editor_state("a\"\"ˇ");
 5785
 5786    // Don't autoclose pair if autoclose is disabled
 5787    cx.set_state("ˇ");
 5788    cx.update_editor(|view, cx| view.handle_input("<", cx));
 5789    cx.assert_editor_state("");
 5790
 5791    // Surround with brackets if text is selected and auto_surround is enabled, even if autoclose is disabled
 5792    cx.set_state("«aˇ» b");
 5793    cx.update_editor(|view, cx| view.handle_input("<", cx));
 5794    cx.assert_editor_state("<«aˇ»> b");
 5795}
 5796
 5797#[gpui::test]
 5798async fn test_always_treat_brackets_as_autoclosed_skip_over(cx: &mut gpui::TestAppContext) {
 5799    init_test(cx, |settings| {
 5800        settings.defaults.always_treat_brackets_as_autoclosed = Some(true);
 5801    });
 5802
 5803    let mut cx = EditorTestContext::new(cx).await;
 5804
 5805    let language = Arc::new(Language::new(
 5806        LanguageConfig {
 5807            brackets: BracketPairConfig {
 5808                pairs: vec![
 5809                    BracketPair {
 5810                        start: "{".to_string(),
 5811                        end: "}".to_string(),
 5812                        close: true,
 5813                        surround: true,
 5814                        newline: true,
 5815                    },
 5816                    BracketPair {
 5817                        start: "(".to_string(),
 5818                        end: ")".to_string(),
 5819                        close: true,
 5820                        surround: true,
 5821                        newline: true,
 5822                    },
 5823                    BracketPair {
 5824                        start: "[".to_string(),
 5825                        end: "]".to_string(),
 5826                        close: false,
 5827                        surround: false,
 5828                        newline: true,
 5829                    },
 5830                ],
 5831                ..Default::default()
 5832            },
 5833            autoclose_before: "})]".to_string(),
 5834            ..Default::default()
 5835        },
 5836        Some(tree_sitter_rust::LANGUAGE.into()),
 5837    ));
 5838
 5839    cx.language_registry().add(language.clone());
 5840    cx.update_buffer(|buffer, cx| {
 5841        buffer.set_language(Some(language), cx);
 5842    });
 5843
 5844    cx.set_state(
 5845        &"
 5846            ˇ
 5847            ˇ
 5848            ˇ
 5849        "
 5850        .unindent(),
 5851    );
 5852
 5853    // ensure only matching closing brackets are skipped over
 5854    cx.update_editor(|view, cx| {
 5855        view.handle_input("}", cx);
 5856        view.move_left(&MoveLeft, cx);
 5857        view.handle_input(")", cx);
 5858        view.move_left(&MoveLeft, cx);
 5859    });
 5860    cx.assert_editor_state(
 5861        &"
 5862            ˇ)}
 5863            ˇ)}
 5864            ˇ)}
 5865        "
 5866        .unindent(),
 5867    );
 5868
 5869    // skip-over closing brackets at multiple cursors
 5870    cx.update_editor(|view, cx| {
 5871        view.handle_input(")", cx);
 5872        view.handle_input("}", cx);
 5873    });
 5874    cx.assert_editor_state(
 5875        &"
 5876            )}ˇ
 5877            )}ˇ
 5878            )}ˇ
 5879        "
 5880        .unindent(),
 5881    );
 5882
 5883    // ignore non-close brackets
 5884    cx.update_editor(|view, cx| {
 5885        view.handle_input("]", cx);
 5886        view.move_left(&MoveLeft, cx);
 5887        view.handle_input("]", cx);
 5888    });
 5889    cx.assert_editor_state(
 5890        &"
 5891            )}]ˇ]
 5892            )}]ˇ]
 5893            )}]ˇ]
 5894        "
 5895        .unindent(),
 5896    );
 5897}
 5898
 5899#[gpui::test]
 5900async fn test_autoclose_with_embedded_language(cx: &mut gpui::TestAppContext) {
 5901    init_test(cx, |_| {});
 5902
 5903    let mut cx = EditorTestContext::new(cx).await;
 5904
 5905    let html_language = Arc::new(
 5906        Language::new(
 5907            LanguageConfig {
 5908                name: "HTML".into(),
 5909                brackets: BracketPairConfig {
 5910                    pairs: vec![
 5911                        BracketPair {
 5912                            start: "<".into(),
 5913                            end: ">".into(),
 5914                            close: true,
 5915                            ..Default::default()
 5916                        },
 5917                        BracketPair {
 5918                            start: "{".into(),
 5919                            end: "}".into(),
 5920                            close: true,
 5921                            ..Default::default()
 5922                        },
 5923                        BracketPair {
 5924                            start: "(".into(),
 5925                            end: ")".into(),
 5926                            close: true,
 5927                            ..Default::default()
 5928                        },
 5929                    ],
 5930                    ..Default::default()
 5931                },
 5932                autoclose_before: "})]>".into(),
 5933                ..Default::default()
 5934            },
 5935            Some(tree_sitter_html::language()),
 5936        )
 5937        .with_injection_query(
 5938            r#"
 5939            (script_element
 5940                (raw_text) @content
 5941                (#set! "language" "javascript"))
 5942            "#,
 5943        )
 5944        .unwrap(),
 5945    );
 5946
 5947    let javascript_language = Arc::new(Language::new(
 5948        LanguageConfig {
 5949            name: "JavaScript".into(),
 5950            brackets: BracketPairConfig {
 5951                pairs: vec![
 5952                    BracketPair {
 5953                        start: "/*".into(),
 5954                        end: " */".into(),
 5955                        close: true,
 5956                        ..Default::default()
 5957                    },
 5958                    BracketPair {
 5959                        start: "{".into(),
 5960                        end: "}".into(),
 5961                        close: true,
 5962                        ..Default::default()
 5963                    },
 5964                    BracketPair {
 5965                        start: "(".into(),
 5966                        end: ")".into(),
 5967                        close: true,
 5968                        ..Default::default()
 5969                    },
 5970                ],
 5971                ..Default::default()
 5972            },
 5973            autoclose_before: "})]>".into(),
 5974            ..Default::default()
 5975        },
 5976        Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
 5977    ));
 5978
 5979    cx.language_registry().add(html_language.clone());
 5980    cx.language_registry().add(javascript_language.clone());
 5981
 5982    cx.update_buffer(|buffer, cx| {
 5983        buffer.set_language(Some(html_language), cx);
 5984    });
 5985
 5986    cx.set_state(
 5987        &r#"
 5988            <body>ˇ
 5989                <script>
 5990                    var x = 1;ˇ
 5991                </script>
 5992            </body>ˇ
 5993        "#
 5994        .unindent(),
 5995    );
 5996
 5997    // Precondition: different languages are active at different locations.
 5998    cx.update_editor(|editor, cx| {
 5999        let snapshot = editor.snapshot(cx);
 6000        let cursors = editor.selections.ranges::<usize>(cx);
 6001        let languages = cursors
 6002            .iter()
 6003            .map(|c| snapshot.language_at(c.start).unwrap().name())
 6004            .collect::<Vec<_>>();
 6005        assert_eq!(
 6006            languages,
 6007            &["HTML".into(), "JavaScript".into(), "HTML".into()]
 6008        );
 6009    });
 6010
 6011    // Angle brackets autoclose in HTML, but not JavaScript.
 6012    cx.update_editor(|editor, cx| {
 6013        editor.handle_input("<", cx);
 6014        editor.handle_input("a", cx);
 6015    });
 6016    cx.assert_editor_state(
 6017        &r#"
 6018            <body><aˇ>
 6019                <script>
 6020                    var x = 1;<aˇ
 6021                </script>
 6022            </body><aˇ>
 6023        "#
 6024        .unindent(),
 6025    );
 6026
 6027    // Curly braces and parens autoclose in both HTML and JavaScript.
 6028    cx.update_editor(|editor, cx| {
 6029        editor.handle_input(" b=", cx);
 6030        editor.handle_input("{", cx);
 6031        editor.handle_input("c", cx);
 6032        editor.handle_input("(", cx);
 6033    });
 6034    cx.assert_editor_state(
 6035        &r#"
 6036            <body><a b={c(ˇ)}>
 6037                <script>
 6038                    var x = 1;<a b={c(ˇ)}
 6039                </script>
 6040            </body><a b={c(ˇ)}>
 6041        "#
 6042        .unindent(),
 6043    );
 6044
 6045    // Brackets that were already autoclosed are skipped.
 6046    cx.update_editor(|editor, cx| {
 6047        editor.handle_input(")", cx);
 6048        editor.handle_input("d", cx);
 6049        editor.handle_input("}", cx);
 6050    });
 6051    cx.assert_editor_state(
 6052        &r#"
 6053            <body><a b={c()d}ˇ>
 6054                <script>
 6055                    var x = 1;<a b={c()d}ˇ
 6056                </script>
 6057            </body><a b={c()d}ˇ>
 6058        "#
 6059        .unindent(),
 6060    );
 6061    cx.update_editor(|editor, cx| {
 6062        editor.handle_input(">", cx);
 6063    });
 6064    cx.assert_editor_state(
 6065        &r#"
 6066            <body><a b={c()d}>ˇ
 6067                <script>
 6068                    var x = 1;<a b={c()d}>ˇ
 6069                </script>
 6070            </body><a b={c()d}>ˇ
 6071        "#
 6072        .unindent(),
 6073    );
 6074
 6075    // Reset
 6076    cx.set_state(
 6077        &r#"
 6078            <body>ˇ
 6079                <script>
 6080                    var x = 1;ˇ
 6081                </script>
 6082            </body>ˇ
 6083        "#
 6084        .unindent(),
 6085    );
 6086
 6087    cx.update_editor(|editor, cx| {
 6088        editor.handle_input("<", cx);
 6089    });
 6090    cx.assert_editor_state(
 6091        &r#"
 6092            <body><ˇ>
 6093                <script>
 6094                    var x = 1;<ˇ
 6095                </script>
 6096            </body><ˇ>
 6097        "#
 6098        .unindent(),
 6099    );
 6100
 6101    // When backspacing, the closing angle brackets are removed.
 6102    cx.update_editor(|editor, cx| {
 6103        editor.backspace(&Backspace, cx);
 6104    });
 6105    cx.assert_editor_state(
 6106        &r#"
 6107            <body>ˇ
 6108                <script>
 6109                    var x = 1;ˇ
 6110                </script>
 6111            </body>ˇ
 6112        "#
 6113        .unindent(),
 6114    );
 6115
 6116    // Block comments autoclose in JavaScript, but not HTML.
 6117    cx.update_editor(|editor, cx| {
 6118        editor.handle_input("/", cx);
 6119        editor.handle_input("*", cx);
 6120    });
 6121    cx.assert_editor_state(
 6122        &r#"
 6123            <body>/*ˇ
 6124                <script>
 6125                    var x = 1;/*ˇ */
 6126                </script>
 6127            </body>/*ˇ
 6128        "#
 6129        .unindent(),
 6130    );
 6131}
 6132
 6133#[gpui::test]
 6134async fn test_autoclose_with_overrides(cx: &mut gpui::TestAppContext) {
 6135    init_test(cx, |_| {});
 6136
 6137    let mut cx = EditorTestContext::new(cx).await;
 6138
 6139    let rust_language = Arc::new(
 6140        Language::new(
 6141            LanguageConfig {
 6142                name: "Rust".into(),
 6143                brackets: serde_json::from_value(json!([
 6144                    { "start": "{", "end": "}", "close": true, "newline": true },
 6145                    { "start": "\"", "end": "\"", "close": true, "newline": false, "not_in": ["string"] },
 6146                ]))
 6147                .unwrap(),
 6148                autoclose_before: "})]>".into(),
 6149                ..Default::default()
 6150            },
 6151            Some(tree_sitter_rust::LANGUAGE.into()),
 6152        )
 6153        .with_override_query("(string_literal) @string")
 6154        .unwrap(),
 6155    );
 6156
 6157    cx.language_registry().add(rust_language.clone());
 6158    cx.update_buffer(|buffer, cx| {
 6159        buffer.set_language(Some(rust_language), cx);
 6160    });
 6161
 6162    cx.set_state(
 6163        &r#"
 6164            let x = ˇ
 6165        "#
 6166        .unindent(),
 6167    );
 6168
 6169    // Inserting a quotation mark. A closing quotation mark is automatically inserted.
 6170    cx.update_editor(|editor, cx| {
 6171        editor.handle_input("\"", cx);
 6172    });
 6173    cx.assert_editor_state(
 6174        &r#"
 6175            let x = "ˇ"
 6176        "#
 6177        .unindent(),
 6178    );
 6179
 6180    // Inserting another quotation mark. The cursor moves across the existing
 6181    // automatically-inserted quotation mark.
 6182    cx.update_editor(|editor, cx| {
 6183        editor.handle_input("\"", cx);
 6184    });
 6185    cx.assert_editor_state(
 6186        &r#"
 6187            let x = ""ˇ
 6188        "#
 6189        .unindent(),
 6190    );
 6191
 6192    // Reset
 6193    cx.set_state(
 6194        &r#"
 6195            let x = ˇ
 6196        "#
 6197        .unindent(),
 6198    );
 6199
 6200    // Inserting a quotation mark inside of a string. A second quotation mark is not inserted.
 6201    cx.update_editor(|editor, cx| {
 6202        editor.handle_input("\"", cx);
 6203        editor.handle_input(" ", cx);
 6204        editor.move_left(&Default::default(), cx);
 6205        editor.handle_input("\\", cx);
 6206        editor.handle_input("\"", cx);
 6207    });
 6208    cx.assert_editor_state(
 6209        &r#"
 6210            let x = "\"ˇ "
 6211        "#
 6212        .unindent(),
 6213    );
 6214
 6215    // Inserting a closing quotation mark at the position of an automatically-inserted quotation
 6216    // mark. Nothing is inserted.
 6217    cx.update_editor(|editor, cx| {
 6218        editor.move_right(&Default::default(), cx);
 6219        editor.handle_input("\"", cx);
 6220    });
 6221    cx.assert_editor_state(
 6222        &r#"
 6223            let x = "\" "ˇ
 6224        "#
 6225        .unindent(),
 6226    );
 6227}
 6228
 6229#[gpui::test]
 6230async fn test_surround_with_pair(cx: &mut gpui::TestAppContext) {
 6231    init_test(cx, |_| {});
 6232
 6233    let language = Arc::new(Language::new(
 6234        LanguageConfig {
 6235            brackets: BracketPairConfig {
 6236                pairs: vec![
 6237                    BracketPair {
 6238                        start: "{".to_string(),
 6239                        end: "}".to_string(),
 6240                        close: true,
 6241                        surround: true,
 6242                        newline: true,
 6243                    },
 6244                    BracketPair {
 6245                        start: "/* ".to_string(),
 6246                        end: "*/".to_string(),
 6247                        close: true,
 6248                        surround: true,
 6249                        ..Default::default()
 6250                    },
 6251                ],
 6252                ..Default::default()
 6253            },
 6254            ..Default::default()
 6255        },
 6256        Some(tree_sitter_rust::LANGUAGE.into()),
 6257    ));
 6258
 6259    let text = r#"
 6260        a
 6261        b
 6262        c
 6263    "#
 6264    .unindent();
 6265
 6266    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
 6267    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 6268    let (view, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6269    view.condition::<crate::EditorEvent>(cx, |view, cx| !view.buffer.read(cx).is_parsing(cx))
 6270        .await;
 6271
 6272    view.update(cx, |view, cx| {
 6273        view.change_selections(None, cx, |s| {
 6274            s.select_display_ranges([
 6275                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 6276                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 6277                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1),
 6278            ])
 6279        });
 6280
 6281        view.handle_input("{", cx);
 6282        view.handle_input("{", cx);
 6283        view.handle_input("{", cx);
 6284        assert_eq!(
 6285            view.text(cx),
 6286            "
 6287                {{{a}}}
 6288                {{{b}}}
 6289                {{{c}}}
 6290            "
 6291            .unindent()
 6292        );
 6293        assert_eq!(
 6294            view.selections.display_ranges(cx),
 6295            [
 6296                DisplayPoint::new(DisplayRow(0), 3)..DisplayPoint::new(DisplayRow(0), 4),
 6297                DisplayPoint::new(DisplayRow(1), 3)..DisplayPoint::new(DisplayRow(1), 4),
 6298                DisplayPoint::new(DisplayRow(2), 3)..DisplayPoint::new(DisplayRow(2), 4)
 6299            ]
 6300        );
 6301
 6302        view.undo(&Undo, cx);
 6303        view.undo(&Undo, cx);
 6304        view.undo(&Undo, cx);
 6305        assert_eq!(
 6306            view.text(cx),
 6307            "
 6308                a
 6309                b
 6310                c
 6311            "
 6312            .unindent()
 6313        );
 6314        assert_eq!(
 6315            view.selections.display_ranges(cx),
 6316            [
 6317                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 6318                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 6319                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1)
 6320            ]
 6321        );
 6322
 6323        // Ensure inserting the first character of a multi-byte bracket pair
 6324        // doesn't surround the selections with the bracket.
 6325        view.handle_input("/", cx);
 6326        assert_eq!(
 6327            view.text(cx),
 6328            "
 6329                /
 6330                /
 6331                /
 6332            "
 6333            .unindent()
 6334        );
 6335        assert_eq!(
 6336            view.selections.display_ranges(cx),
 6337            [
 6338                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 6339                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 6340                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1)
 6341            ]
 6342        );
 6343
 6344        view.undo(&Undo, cx);
 6345        assert_eq!(
 6346            view.text(cx),
 6347            "
 6348                a
 6349                b
 6350                c
 6351            "
 6352            .unindent()
 6353        );
 6354        assert_eq!(
 6355            view.selections.display_ranges(cx),
 6356            [
 6357                DisplayPoint::new(DisplayRow(0), 0)..DisplayPoint::new(DisplayRow(0), 1),
 6358                DisplayPoint::new(DisplayRow(1), 0)..DisplayPoint::new(DisplayRow(1), 1),
 6359                DisplayPoint::new(DisplayRow(2), 0)..DisplayPoint::new(DisplayRow(2), 1)
 6360            ]
 6361        );
 6362
 6363        // Ensure inserting the last character of a multi-byte bracket pair
 6364        // doesn't surround the selections with the bracket.
 6365        view.handle_input("*", cx);
 6366        assert_eq!(
 6367            view.text(cx),
 6368            "
 6369                *
 6370                *
 6371                *
 6372            "
 6373            .unindent()
 6374        );
 6375        assert_eq!(
 6376            view.selections.display_ranges(cx),
 6377            [
 6378                DisplayPoint::new(DisplayRow(0), 1)..DisplayPoint::new(DisplayRow(0), 1),
 6379                DisplayPoint::new(DisplayRow(1), 1)..DisplayPoint::new(DisplayRow(1), 1),
 6380                DisplayPoint::new(DisplayRow(2), 1)..DisplayPoint::new(DisplayRow(2), 1)
 6381            ]
 6382        );
 6383    });
 6384}
 6385
 6386#[gpui::test]
 6387async fn test_delete_autoclose_pair(cx: &mut gpui::TestAppContext) {
 6388    init_test(cx, |_| {});
 6389
 6390    let language = Arc::new(Language::new(
 6391        LanguageConfig {
 6392            brackets: BracketPairConfig {
 6393                pairs: vec![BracketPair {
 6394                    start: "{".to_string(),
 6395                    end: "}".to_string(),
 6396                    close: true,
 6397                    surround: true,
 6398                    newline: true,
 6399                }],
 6400                ..Default::default()
 6401            },
 6402            autoclose_before: "}".to_string(),
 6403            ..Default::default()
 6404        },
 6405        Some(tree_sitter_rust::LANGUAGE.into()),
 6406    ));
 6407
 6408    let text = r#"
 6409        a
 6410        b
 6411        c
 6412    "#
 6413    .unindent();
 6414
 6415    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
 6416    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 6417    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6418    editor
 6419        .condition::<crate::EditorEvent>(cx, |view, cx| !view.buffer.read(cx).is_parsing(cx))
 6420        .await;
 6421
 6422    editor.update(cx, |editor, cx| {
 6423        editor.change_selections(None, cx, |s| {
 6424            s.select_ranges([
 6425                Point::new(0, 1)..Point::new(0, 1),
 6426                Point::new(1, 1)..Point::new(1, 1),
 6427                Point::new(2, 1)..Point::new(2, 1),
 6428            ])
 6429        });
 6430
 6431        editor.handle_input("{", cx);
 6432        editor.handle_input("{", cx);
 6433        editor.handle_input("_", cx);
 6434        assert_eq!(
 6435            editor.text(cx),
 6436            "
 6437                a{{_}}
 6438                b{{_}}
 6439                c{{_}}
 6440            "
 6441            .unindent()
 6442        );
 6443        assert_eq!(
 6444            editor.selections.ranges::<Point>(cx),
 6445            [
 6446                Point::new(0, 4)..Point::new(0, 4),
 6447                Point::new(1, 4)..Point::new(1, 4),
 6448                Point::new(2, 4)..Point::new(2, 4)
 6449            ]
 6450        );
 6451
 6452        editor.backspace(&Default::default(), cx);
 6453        editor.backspace(&Default::default(), cx);
 6454        assert_eq!(
 6455            editor.text(cx),
 6456            "
 6457                a{}
 6458                b{}
 6459                c{}
 6460            "
 6461            .unindent()
 6462        );
 6463        assert_eq!(
 6464            editor.selections.ranges::<Point>(cx),
 6465            [
 6466                Point::new(0, 2)..Point::new(0, 2),
 6467                Point::new(1, 2)..Point::new(1, 2),
 6468                Point::new(2, 2)..Point::new(2, 2)
 6469            ]
 6470        );
 6471
 6472        editor.delete_to_previous_word_start(&Default::default(), cx);
 6473        assert_eq!(
 6474            editor.text(cx),
 6475            "
 6476                a
 6477                b
 6478                c
 6479            "
 6480            .unindent()
 6481        );
 6482        assert_eq!(
 6483            editor.selections.ranges::<Point>(cx),
 6484            [
 6485                Point::new(0, 1)..Point::new(0, 1),
 6486                Point::new(1, 1)..Point::new(1, 1),
 6487                Point::new(2, 1)..Point::new(2, 1)
 6488            ]
 6489        );
 6490    });
 6491}
 6492
 6493#[gpui::test]
 6494async fn test_always_treat_brackets_as_autoclosed_delete(cx: &mut gpui::TestAppContext) {
 6495    init_test(cx, |settings| {
 6496        settings.defaults.always_treat_brackets_as_autoclosed = Some(true);
 6497    });
 6498
 6499    let mut cx = EditorTestContext::new(cx).await;
 6500
 6501    let language = Arc::new(Language::new(
 6502        LanguageConfig {
 6503            brackets: BracketPairConfig {
 6504                pairs: vec![
 6505                    BracketPair {
 6506                        start: "{".to_string(),
 6507                        end: "}".to_string(),
 6508                        close: true,
 6509                        surround: true,
 6510                        newline: true,
 6511                    },
 6512                    BracketPair {
 6513                        start: "(".to_string(),
 6514                        end: ")".to_string(),
 6515                        close: true,
 6516                        surround: true,
 6517                        newline: true,
 6518                    },
 6519                    BracketPair {
 6520                        start: "[".to_string(),
 6521                        end: "]".to_string(),
 6522                        close: false,
 6523                        surround: true,
 6524                        newline: true,
 6525                    },
 6526                ],
 6527                ..Default::default()
 6528            },
 6529            autoclose_before: "})]".to_string(),
 6530            ..Default::default()
 6531        },
 6532        Some(tree_sitter_rust::LANGUAGE.into()),
 6533    ));
 6534
 6535    cx.language_registry().add(language.clone());
 6536    cx.update_buffer(|buffer, cx| {
 6537        buffer.set_language(Some(language), cx);
 6538    });
 6539
 6540    cx.set_state(
 6541        &"
 6542            {(ˇ)}
 6543            [[ˇ]]
 6544            {(ˇ)}
 6545        "
 6546        .unindent(),
 6547    );
 6548
 6549    cx.update_editor(|view, cx| {
 6550        view.backspace(&Default::default(), cx);
 6551        view.backspace(&Default::default(), cx);
 6552    });
 6553
 6554    cx.assert_editor_state(
 6555        &"
 6556            ˇ
 6557            ˇ]]
 6558            ˇ
 6559        "
 6560        .unindent(),
 6561    );
 6562
 6563    cx.update_editor(|view, cx| {
 6564        view.handle_input("{", cx);
 6565        view.handle_input("{", cx);
 6566        view.move_right(&MoveRight, cx);
 6567        view.move_right(&MoveRight, cx);
 6568        view.move_left(&MoveLeft, cx);
 6569        view.move_left(&MoveLeft, cx);
 6570        view.backspace(&Default::default(), cx);
 6571    });
 6572
 6573    cx.assert_editor_state(
 6574        &"
 6575            {ˇ}
 6576            {ˇ}]]
 6577            {ˇ}
 6578        "
 6579        .unindent(),
 6580    );
 6581
 6582    cx.update_editor(|view, cx| {
 6583        view.backspace(&Default::default(), cx);
 6584    });
 6585
 6586    cx.assert_editor_state(
 6587        &"
 6588            ˇ
 6589            ˇ]]
 6590            ˇ
 6591        "
 6592        .unindent(),
 6593    );
 6594}
 6595
 6596#[gpui::test]
 6597async fn test_auto_replace_emoji_shortcode(cx: &mut gpui::TestAppContext) {
 6598    init_test(cx, |_| {});
 6599
 6600    let language = Arc::new(Language::new(
 6601        LanguageConfig::default(),
 6602        Some(tree_sitter_rust::LANGUAGE.into()),
 6603    ));
 6604
 6605    let buffer = cx.new_model(|cx| Buffer::local("", cx).with_language(language, cx));
 6606    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 6607    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6608    editor
 6609        .condition::<crate::EditorEvent>(cx, |view, cx| !view.buffer.read(cx).is_parsing(cx))
 6610        .await;
 6611
 6612    editor.update(cx, |editor, cx| {
 6613        editor.set_auto_replace_emoji_shortcode(true);
 6614
 6615        editor.handle_input("Hello ", cx);
 6616        editor.handle_input(":wave", cx);
 6617        assert_eq!(editor.text(cx), "Hello :wave".unindent());
 6618
 6619        editor.handle_input(":", cx);
 6620        assert_eq!(editor.text(cx), "Hello 👋".unindent());
 6621
 6622        editor.handle_input(" :smile", cx);
 6623        assert_eq!(editor.text(cx), "Hello 👋 :smile".unindent());
 6624
 6625        editor.handle_input(":", cx);
 6626        assert_eq!(editor.text(cx), "Hello 👋 😄".unindent());
 6627
 6628        // Ensure shortcode gets replaced when it is part of a word that only consists of emojis
 6629        editor.handle_input(":wave", cx);
 6630        assert_eq!(editor.text(cx), "Hello 👋 😄:wave".unindent());
 6631
 6632        editor.handle_input(":", cx);
 6633        assert_eq!(editor.text(cx), "Hello 👋 😄👋".unindent());
 6634
 6635        editor.handle_input(":1", cx);
 6636        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1".unindent());
 6637
 6638        editor.handle_input(":", cx);
 6639        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1:".unindent());
 6640
 6641        // Ensure shortcode does not get replaced when it is part of a word
 6642        editor.handle_input(" Test:wave", cx);
 6643        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1: Test:wave".unindent());
 6644
 6645        editor.handle_input(":", cx);
 6646        assert_eq!(editor.text(cx), "Hello 👋 😄👋:1: Test:wave:".unindent());
 6647
 6648        editor.set_auto_replace_emoji_shortcode(false);
 6649
 6650        // Ensure shortcode does not get replaced when auto replace is off
 6651        editor.handle_input(" :wave", cx);
 6652        assert_eq!(
 6653            editor.text(cx),
 6654            "Hello 👋 😄👋:1: Test:wave: :wave".unindent()
 6655        );
 6656
 6657        editor.handle_input(":", cx);
 6658        assert_eq!(
 6659            editor.text(cx),
 6660            "Hello 👋 😄👋:1: Test:wave: :wave:".unindent()
 6661        );
 6662    });
 6663}
 6664
 6665#[gpui::test]
 6666async fn test_snippet_placeholder_choices(cx: &mut gpui::TestAppContext) {
 6667    init_test(cx, |_| {});
 6668
 6669    let (text, insertion_ranges) = marked_text_ranges(
 6670        indoc! {"
 6671            ˇ
 6672        "},
 6673        false,
 6674    );
 6675
 6676    let buffer = cx.update(|cx| MultiBuffer::build_simple(&text, cx));
 6677    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6678
 6679    _ = editor.update(cx, |editor, cx| {
 6680        let snippet = Snippet::parse("type ${1|,i32,u32|} = $2").unwrap();
 6681
 6682        editor
 6683            .insert_snippet(&insertion_ranges, snippet, cx)
 6684            .unwrap();
 6685
 6686        fn assert(editor: &mut Editor, cx: &mut ViewContext<Editor>, marked_text: &str) {
 6687            let (expected_text, selection_ranges) = marked_text_ranges(marked_text, false);
 6688            assert_eq!(editor.text(cx), expected_text);
 6689            assert_eq!(editor.selections.ranges::<usize>(cx), selection_ranges);
 6690        }
 6691
 6692        assert(
 6693            editor,
 6694            cx,
 6695            indoc! {"
 6696            type «» =•
 6697            "},
 6698        );
 6699
 6700        assert!(editor.context_menu_visible(), "There should be a matches");
 6701    });
 6702}
 6703
 6704#[gpui::test]
 6705async fn test_snippets(cx: &mut gpui::TestAppContext) {
 6706    init_test(cx, |_| {});
 6707
 6708    let (text, insertion_ranges) = marked_text_ranges(
 6709        indoc! {"
 6710            a.ˇ b
 6711            a.ˇ b
 6712            a.ˇ b
 6713        "},
 6714        false,
 6715    );
 6716
 6717    let buffer = cx.update(|cx| MultiBuffer::build_simple(&text, cx));
 6718    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6719
 6720    editor.update(cx, |editor, cx| {
 6721        let snippet = Snippet::parse("f(${1:one}, ${2:two}, ${1:three})$0").unwrap();
 6722
 6723        editor
 6724            .insert_snippet(&insertion_ranges, snippet, cx)
 6725            .unwrap();
 6726
 6727        fn assert(editor: &mut Editor, cx: &mut ViewContext<Editor>, marked_text: &str) {
 6728            let (expected_text, selection_ranges) = marked_text_ranges(marked_text, false);
 6729            assert_eq!(editor.text(cx), expected_text);
 6730            assert_eq!(editor.selections.ranges::<usize>(cx), selection_ranges);
 6731        }
 6732
 6733        assert(
 6734            editor,
 6735            cx,
 6736            indoc! {"
 6737                a.f(«one», two, «three») b
 6738                a.f(«one», two, «three») b
 6739                a.f(«one», two, «three») b
 6740            "},
 6741        );
 6742
 6743        // Can't move earlier than the first tab stop
 6744        assert!(!editor.move_to_prev_snippet_tabstop(cx));
 6745        assert(
 6746            editor,
 6747            cx,
 6748            indoc! {"
 6749                a.f(«one», two, «three») b
 6750                a.f(«one», two, «three») b
 6751                a.f(«one», two, «three») b
 6752            "},
 6753        );
 6754
 6755        assert!(editor.move_to_next_snippet_tabstop(cx));
 6756        assert(
 6757            editor,
 6758            cx,
 6759            indoc! {"
 6760                a.f(one, «two», three) b
 6761                a.f(one, «two», three) b
 6762                a.f(one, «two», three) b
 6763            "},
 6764        );
 6765
 6766        editor.move_to_prev_snippet_tabstop(cx);
 6767        assert(
 6768            editor,
 6769            cx,
 6770            indoc! {"
 6771                a.f(«one», two, «three») b
 6772                a.f(«one», two, «three») b
 6773                a.f(«one», two, «three») b
 6774            "},
 6775        );
 6776
 6777        assert!(editor.move_to_next_snippet_tabstop(cx));
 6778        assert(
 6779            editor,
 6780            cx,
 6781            indoc! {"
 6782                a.f(one, «two», three) b
 6783                a.f(one, «two», three) b
 6784                a.f(one, «two», three) b
 6785            "},
 6786        );
 6787        assert!(editor.move_to_next_snippet_tabstop(cx));
 6788        assert(
 6789            editor,
 6790            cx,
 6791            indoc! {"
 6792                a.f(one, two, three)ˇ b
 6793                a.f(one, two, three)ˇ b
 6794                a.f(one, two, three)ˇ b
 6795            "},
 6796        );
 6797
 6798        // As soon as the last tab stop is reached, snippet state is gone
 6799        editor.move_to_prev_snippet_tabstop(cx);
 6800        assert(
 6801            editor,
 6802            cx,
 6803            indoc! {"
 6804                a.f(one, two, three)ˇ b
 6805                a.f(one, two, three)ˇ b
 6806                a.f(one, two, three)ˇ b
 6807            "},
 6808        );
 6809    });
 6810}
 6811
 6812#[gpui::test]
 6813async fn test_document_format_during_save(cx: &mut gpui::TestAppContext) {
 6814    init_test(cx, |_| {});
 6815
 6816    let fs = FakeFs::new(cx.executor());
 6817    fs.insert_file("/file.rs", Default::default()).await;
 6818
 6819    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 6820
 6821    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 6822    language_registry.add(rust_lang());
 6823    let mut fake_servers = language_registry.register_fake_lsp(
 6824        "Rust",
 6825        FakeLspAdapter {
 6826            capabilities: lsp::ServerCapabilities {
 6827                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 6828                ..Default::default()
 6829            },
 6830            ..Default::default()
 6831        },
 6832    );
 6833
 6834    let buffer = project
 6835        .update(cx, |project, cx| project.open_local_buffer("/file.rs", cx))
 6836        .await
 6837        .unwrap();
 6838
 6839    cx.executor().start_waiting();
 6840    let fake_server = fake_servers.next().await.unwrap();
 6841
 6842    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 6843    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 6844    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 6845    assert!(cx.read(|cx| editor.is_dirty(cx)));
 6846
 6847    let save = editor
 6848        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 6849        .unwrap();
 6850    fake_server
 6851        .handle_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 6852            assert_eq!(
 6853                params.text_document.uri,
 6854                lsp::Url::from_file_path("/file.rs").unwrap()
 6855            );
 6856            assert_eq!(params.options.tab_size, 4);
 6857            Ok(Some(vec![lsp::TextEdit::new(
 6858                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 6859                ", ".to_string(),
 6860            )]))
 6861        })
 6862        .next()
 6863        .await;
 6864    cx.executor().start_waiting();
 6865    save.await;
 6866
 6867    assert_eq!(
 6868        editor.update(cx, |editor, cx| editor.text(cx)),
 6869        "one, two\nthree\n"
 6870    );
 6871    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 6872
 6873    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 6874    assert!(cx.read(|cx| editor.is_dirty(cx)));
 6875
 6876    // Ensure we can still save even if formatting hangs.
 6877    fake_server.handle_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 6878        assert_eq!(
 6879            params.text_document.uri,
 6880            lsp::Url::from_file_path("/file.rs").unwrap()
 6881        );
 6882        futures::future::pending::<()>().await;
 6883        unreachable!()
 6884    });
 6885    let save = editor
 6886        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 6887        .unwrap();
 6888    cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 6889    cx.executor().start_waiting();
 6890    save.await;
 6891    assert_eq!(
 6892        editor.update(cx, |editor, cx| editor.text(cx)),
 6893        "one\ntwo\nthree\n"
 6894    );
 6895    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 6896
 6897    // For non-dirty buffer, no formatting request should be sent
 6898    let save = editor
 6899        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 6900        .unwrap();
 6901    let _pending_format_request = fake_server
 6902        .handle_request::<lsp::request::RangeFormatting, _, _>(move |_, _| async move {
 6903            panic!("Should not be invoked on non-dirty buffer");
 6904        })
 6905        .next();
 6906    cx.executor().start_waiting();
 6907    save.await;
 6908
 6909    // Set rust language override and assert overridden tabsize is sent to language server
 6910    update_test_language_settings(cx, |settings| {
 6911        settings.languages.insert(
 6912            "Rust".into(),
 6913            LanguageSettingsContent {
 6914                tab_size: NonZeroU32::new(8),
 6915                ..Default::default()
 6916            },
 6917        );
 6918    });
 6919
 6920    editor.update(cx, |editor, cx| editor.set_text("somehting_new\n", cx));
 6921    assert!(cx.read(|cx| editor.is_dirty(cx)));
 6922    let save = editor
 6923        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 6924        .unwrap();
 6925    fake_server
 6926        .handle_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 6927            assert_eq!(
 6928                params.text_document.uri,
 6929                lsp::Url::from_file_path("/file.rs").unwrap()
 6930            );
 6931            assert_eq!(params.options.tab_size, 8);
 6932            Ok(Some(vec![]))
 6933        })
 6934        .next()
 6935        .await;
 6936    cx.executor().start_waiting();
 6937    save.await;
 6938}
 6939
 6940#[gpui::test]
 6941async fn test_multibuffer_format_during_save(cx: &mut gpui::TestAppContext) {
 6942    init_test(cx, |_| {});
 6943
 6944    let cols = 4;
 6945    let rows = 10;
 6946    let sample_text_1 = sample_text(rows, cols, 'a');
 6947    assert_eq!(
 6948        sample_text_1,
 6949        "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj"
 6950    );
 6951    let sample_text_2 = sample_text(rows, cols, 'l');
 6952    assert_eq!(
 6953        sample_text_2,
 6954        "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu"
 6955    );
 6956    let sample_text_3 = sample_text(rows, cols, 'v');
 6957    assert_eq!(
 6958        sample_text_3,
 6959        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}"
 6960    );
 6961
 6962    let fs = FakeFs::new(cx.executor());
 6963    fs.insert_tree(
 6964        "/a",
 6965        json!({
 6966            "main.rs": sample_text_1,
 6967            "other.rs": sample_text_2,
 6968            "lib.rs": sample_text_3,
 6969        }),
 6970    )
 6971    .await;
 6972
 6973    let project = Project::test(fs, ["/a".as_ref()], cx).await;
 6974    let workspace = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
 6975    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
 6976
 6977    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 6978    language_registry.add(rust_lang());
 6979    let mut fake_servers = language_registry.register_fake_lsp(
 6980        "Rust",
 6981        FakeLspAdapter {
 6982            capabilities: lsp::ServerCapabilities {
 6983                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 6984                ..Default::default()
 6985            },
 6986            ..Default::default()
 6987        },
 6988    );
 6989
 6990    let worktree = project.update(cx, |project, cx| {
 6991        let mut worktrees = project.worktrees(cx).collect::<Vec<_>>();
 6992        assert_eq!(worktrees.len(), 1);
 6993        worktrees.pop().unwrap()
 6994    });
 6995    let worktree_id = worktree.update(cx, |worktree, _| worktree.id());
 6996
 6997    let buffer_1 = project
 6998        .update(cx, |project, cx| {
 6999            project.open_buffer((worktree_id, "main.rs"), cx)
 7000        })
 7001        .await
 7002        .unwrap();
 7003    let buffer_2 = project
 7004        .update(cx, |project, cx| {
 7005            project.open_buffer((worktree_id, "other.rs"), cx)
 7006        })
 7007        .await
 7008        .unwrap();
 7009    let buffer_3 = project
 7010        .update(cx, |project, cx| {
 7011            project.open_buffer((worktree_id, "lib.rs"), cx)
 7012        })
 7013        .await
 7014        .unwrap();
 7015
 7016    let multi_buffer = cx.new_model(|cx| {
 7017        let mut multi_buffer = MultiBuffer::new(ReadWrite);
 7018        multi_buffer.push_excerpts(
 7019            buffer_1.clone(),
 7020            [
 7021                ExcerptRange {
 7022                    context: Point::new(0, 0)..Point::new(3, 0),
 7023                    primary: None,
 7024                },
 7025                ExcerptRange {
 7026                    context: Point::new(5, 0)..Point::new(7, 0),
 7027                    primary: None,
 7028                },
 7029                ExcerptRange {
 7030                    context: Point::new(9, 0)..Point::new(10, 4),
 7031                    primary: None,
 7032                },
 7033            ],
 7034            cx,
 7035        );
 7036        multi_buffer.push_excerpts(
 7037            buffer_2.clone(),
 7038            [
 7039                ExcerptRange {
 7040                    context: Point::new(0, 0)..Point::new(3, 0),
 7041                    primary: None,
 7042                },
 7043                ExcerptRange {
 7044                    context: Point::new(5, 0)..Point::new(7, 0),
 7045                    primary: None,
 7046                },
 7047                ExcerptRange {
 7048                    context: Point::new(9, 0)..Point::new(10, 4),
 7049                    primary: None,
 7050                },
 7051            ],
 7052            cx,
 7053        );
 7054        multi_buffer.push_excerpts(
 7055            buffer_3.clone(),
 7056            [
 7057                ExcerptRange {
 7058                    context: Point::new(0, 0)..Point::new(3, 0),
 7059                    primary: None,
 7060                },
 7061                ExcerptRange {
 7062                    context: Point::new(5, 0)..Point::new(7, 0),
 7063                    primary: None,
 7064                },
 7065                ExcerptRange {
 7066                    context: Point::new(9, 0)..Point::new(10, 4),
 7067                    primary: None,
 7068                },
 7069            ],
 7070            cx,
 7071        );
 7072        multi_buffer
 7073    });
 7074    let multi_buffer_editor = cx.new_view(|cx| {
 7075        Editor::new(
 7076            EditorMode::Full,
 7077            multi_buffer,
 7078            Some(project.clone()),
 7079            true,
 7080            cx,
 7081        )
 7082    });
 7083
 7084    multi_buffer_editor.update(cx, |editor, cx| {
 7085        editor.change_selections(Some(Autoscroll::Next), cx, |s| s.select_ranges(Some(1..2)));
 7086        editor.insert("|one|two|three|", cx);
 7087    });
 7088    assert!(cx.read(|cx| multi_buffer_editor.is_dirty(cx)));
 7089    multi_buffer_editor.update(cx, |editor, cx| {
 7090        editor.change_selections(Some(Autoscroll::Next), cx, |s| {
 7091            s.select_ranges(Some(60..70))
 7092        });
 7093        editor.insert("|four|five|six|", cx);
 7094    });
 7095    assert!(cx.read(|cx| multi_buffer_editor.is_dirty(cx)));
 7096
 7097    // First two buffers should be edited, but not the third one.
 7098    assert_eq!(
 7099        multi_buffer_editor.update(cx, |editor, cx| editor.text(cx)),
 7100        "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}",
 7101    );
 7102    buffer_1.update(cx, |buffer, _| {
 7103        assert!(buffer.is_dirty());
 7104        assert_eq!(
 7105            buffer.text(),
 7106            "a|one|two|three|aa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj",
 7107        )
 7108    });
 7109    buffer_2.update(cx, |buffer, _| {
 7110        assert!(buffer.is_dirty());
 7111        assert_eq!(
 7112            buffer.text(),
 7113            "llll\nmmmm\nnnnn|four|five|six|oooo\npppp\nr\nssss\ntttt\nuuuu",
 7114        )
 7115    });
 7116    buffer_3.update(cx, |buffer, _| {
 7117        assert!(!buffer.is_dirty());
 7118        assert_eq!(buffer.text(), sample_text_3,)
 7119    });
 7120
 7121    cx.executor().start_waiting();
 7122    let save = multi_buffer_editor
 7123        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 7124        .unwrap();
 7125
 7126    let fake_server = fake_servers.next().await.unwrap();
 7127    fake_server
 7128        .server
 7129        .on_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 7130            Ok(Some(vec![lsp::TextEdit::new(
 7131                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 7132                format!("[{} formatted]", params.text_document.uri),
 7133            )]))
 7134        })
 7135        .detach();
 7136    save.await;
 7137
 7138    // After multibuffer saving, only first two buffers should be reformatted, but not the third one (as it was not dirty).
 7139    assert!(cx.read(|cx| !multi_buffer_editor.is_dirty(cx)));
 7140    assert_eq!(
 7141        multi_buffer_editor.update(cx, |editor, cx| editor.text(cx)),
 7142        "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}",
 7143    );
 7144    buffer_1.update(cx, |buffer, _| {
 7145        assert!(!buffer.is_dirty());
 7146        assert_eq!(
 7147            buffer.text(),
 7148            "a|o[file:///a/main.rs formatted]bbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj\n",
 7149        )
 7150    });
 7151    buffer_2.update(cx, |buffer, _| {
 7152        assert!(!buffer.is_dirty());
 7153        assert_eq!(
 7154            buffer.text(),
 7155            "lll[file:///a/other.rs formatted]mmmm\nnnnn|four|five|six|oooo\npppp\nr\nssss\ntttt\nuuuu\n",
 7156        )
 7157    });
 7158    buffer_3.update(cx, |buffer, _| {
 7159        assert!(!buffer.is_dirty());
 7160        assert_eq!(buffer.text(), sample_text_3,)
 7161    });
 7162}
 7163
 7164#[gpui::test]
 7165async fn test_range_format_during_save(cx: &mut gpui::TestAppContext) {
 7166    init_test(cx, |_| {});
 7167
 7168    let fs = FakeFs::new(cx.executor());
 7169    fs.insert_file("/file.rs", Default::default()).await;
 7170
 7171    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 7172
 7173    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 7174    language_registry.add(rust_lang());
 7175    let mut fake_servers = language_registry.register_fake_lsp(
 7176        "Rust",
 7177        FakeLspAdapter {
 7178            capabilities: lsp::ServerCapabilities {
 7179                document_range_formatting_provider: Some(lsp::OneOf::Left(true)),
 7180                ..Default::default()
 7181            },
 7182            ..Default::default()
 7183        },
 7184    );
 7185
 7186    let buffer = project
 7187        .update(cx, |project, cx| project.open_local_buffer("/file.rs", cx))
 7188        .await
 7189        .unwrap();
 7190
 7191    cx.executor().start_waiting();
 7192    let fake_server = fake_servers.next().await.unwrap();
 7193
 7194    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 7195    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 7196    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 7197    assert!(cx.read(|cx| editor.is_dirty(cx)));
 7198
 7199    let save = editor
 7200        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 7201        .unwrap();
 7202    fake_server
 7203        .handle_request::<lsp::request::RangeFormatting, _, _>(move |params, _| async move {
 7204            assert_eq!(
 7205                params.text_document.uri,
 7206                lsp::Url::from_file_path("/file.rs").unwrap()
 7207            );
 7208            assert_eq!(params.options.tab_size, 4);
 7209            Ok(Some(vec![lsp::TextEdit::new(
 7210                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 7211                ", ".to_string(),
 7212            )]))
 7213        })
 7214        .next()
 7215        .await;
 7216    cx.executor().start_waiting();
 7217    save.await;
 7218    assert_eq!(
 7219        editor.update(cx, |editor, cx| editor.text(cx)),
 7220        "one, two\nthree\n"
 7221    );
 7222    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 7223
 7224    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 7225    assert!(cx.read(|cx| editor.is_dirty(cx)));
 7226
 7227    // Ensure we can still save even if formatting hangs.
 7228    fake_server.handle_request::<lsp::request::RangeFormatting, _, _>(
 7229        move |params, _| async move {
 7230            assert_eq!(
 7231                params.text_document.uri,
 7232                lsp::Url::from_file_path("/file.rs").unwrap()
 7233            );
 7234            futures::future::pending::<()>().await;
 7235            unreachable!()
 7236        },
 7237    );
 7238    let save = editor
 7239        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 7240        .unwrap();
 7241    cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 7242    cx.executor().start_waiting();
 7243    save.await;
 7244    assert_eq!(
 7245        editor.update(cx, |editor, cx| editor.text(cx)),
 7246        "one\ntwo\nthree\n"
 7247    );
 7248    assert!(!cx.read(|cx| editor.is_dirty(cx)));
 7249
 7250    // For non-dirty buffer, no formatting request should be sent
 7251    let save = editor
 7252        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 7253        .unwrap();
 7254    let _pending_format_request = fake_server
 7255        .handle_request::<lsp::request::RangeFormatting, _, _>(move |_, _| async move {
 7256            panic!("Should not be invoked on non-dirty buffer");
 7257        })
 7258        .next();
 7259    cx.executor().start_waiting();
 7260    save.await;
 7261
 7262    // Set Rust language override and assert overridden tabsize is sent to language server
 7263    update_test_language_settings(cx, |settings| {
 7264        settings.languages.insert(
 7265            "Rust".into(),
 7266            LanguageSettingsContent {
 7267                tab_size: NonZeroU32::new(8),
 7268                ..Default::default()
 7269            },
 7270        );
 7271    });
 7272
 7273    editor.update(cx, |editor, cx| editor.set_text("somehting_new\n", cx));
 7274    assert!(cx.read(|cx| editor.is_dirty(cx)));
 7275    let save = editor
 7276        .update(cx, |editor, cx| editor.save(true, project.clone(), cx))
 7277        .unwrap();
 7278    fake_server
 7279        .handle_request::<lsp::request::RangeFormatting, _, _>(move |params, _| async move {
 7280            assert_eq!(
 7281                params.text_document.uri,
 7282                lsp::Url::from_file_path("/file.rs").unwrap()
 7283            );
 7284            assert_eq!(params.options.tab_size, 8);
 7285            Ok(Some(vec![]))
 7286        })
 7287        .next()
 7288        .await;
 7289    cx.executor().start_waiting();
 7290    save.await;
 7291}
 7292
 7293#[gpui::test]
 7294async fn test_document_format_manual_trigger(cx: &mut gpui::TestAppContext) {
 7295    init_test(cx, |settings| {
 7296        settings.defaults.formatter = Some(language_settings::SelectedFormatter::List(
 7297            FormatterList(vec![Formatter::LanguageServer { name: None }].into()),
 7298        ))
 7299    });
 7300
 7301    let fs = FakeFs::new(cx.executor());
 7302    fs.insert_file("/file.rs", Default::default()).await;
 7303
 7304    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 7305
 7306    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
 7307    language_registry.add(Arc::new(Language::new(
 7308        LanguageConfig {
 7309            name: "Rust".into(),
 7310            matcher: LanguageMatcher {
 7311                path_suffixes: vec!["rs".to_string()],
 7312                ..Default::default()
 7313            },
 7314            ..LanguageConfig::default()
 7315        },
 7316        Some(tree_sitter_rust::LANGUAGE.into()),
 7317    )));
 7318    update_test_language_settings(cx, |settings| {
 7319        // Enable Prettier formatting for the same buffer, and ensure
 7320        // LSP is called instead of Prettier.
 7321        settings.defaults.prettier = Some(PrettierSettings {
 7322            allowed: true,
 7323            ..PrettierSettings::default()
 7324        });
 7325    });
 7326    let mut fake_servers = language_registry.register_fake_lsp(
 7327        "Rust",
 7328        FakeLspAdapter {
 7329            capabilities: lsp::ServerCapabilities {
 7330                document_formatting_provider: Some(lsp::OneOf::Left(true)),
 7331                ..Default::default()
 7332            },
 7333            ..Default::default()
 7334        },
 7335    );
 7336
 7337    let buffer = project
 7338        .update(cx, |project, cx| project.open_local_buffer("/file.rs", cx))
 7339        .await
 7340        .unwrap();
 7341
 7342    cx.executor().start_waiting();
 7343    let fake_server = fake_servers.next().await.unwrap();
 7344
 7345    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 7346    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 7347    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 7348
 7349    let format = editor
 7350        .update(cx, |editor, cx| {
 7351            editor.perform_format(
 7352                project.clone(),
 7353                FormatTrigger::Manual,
 7354                FormatTarget::Buffer,
 7355                cx,
 7356            )
 7357        })
 7358        .unwrap();
 7359    fake_server
 7360        .handle_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 7361            assert_eq!(
 7362                params.text_document.uri,
 7363                lsp::Url::from_file_path("/file.rs").unwrap()
 7364            );
 7365            assert_eq!(params.options.tab_size, 4);
 7366            Ok(Some(vec![lsp::TextEdit::new(
 7367                lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(1, 0)),
 7368                ", ".to_string(),
 7369            )]))
 7370        })
 7371        .next()
 7372        .await;
 7373    cx.executor().start_waiting();
 7374    format.await;
 7375    assert_eq!(
 7376        editor.update(cx, |editor, cx| editor.text(cx)),
 7377        "one, two\nthree\n"
 7378    );
 7379
 7380    editor.update(cx, |editor, cx| editor.set_text("one\ntwo\nthree\n", cx));
 7381    // Ensure we don't lock if formatting hangs.
 7382    fake_server.handle_request::<lsp::request::Formatting, _, _>(move |params, _| async move {
 7383        assert_eq!(
 7384            params.text_document.uri,
 7385            lsp::Url::from_file_path("/file.rs").unwrap()
 7386        );
 7387        futures::future::pending::<()>().await;
 7388        unreachable!()
 7389    });
 7390    let format = editor
 7391        .update(cx, |editor, cx| {
 7392            editor.perform_format(project, FormatTrigger::Manual, FormatTarget::Buffer, cx)
 7393        })
 7394        .unwrap();
 7395    cx.executor().advance_clock(super::FORMAT_TIMEOUT);
 7396    cx.executor().start_waiting();
 7397    format.await;
 7398    assert_eq!(
 7399        editor.update(cx, |editor, cx| editor.text(cx)),
 7400        "one\ntwo\nthree\n"
 7401    );
 7402}
 7403
 7404#[gpui::test]
 7405async fn test_concurrent_format_requests(cx: &mut gpui::TestAppContext) {
 7406    init_test(cx, |_| {});
 7407
 7408    let mut cx = EditorLspTestContext::new_rust(
 7409        lsp::ServerCapabilities {
 7410            document_formatting_provider: Some(lsp::OneOf::Left(true)),
 7411            ..Default::default()
 7412        },
 7413        cx,
 7414    )
 7415    .await;
 7416
 7417    cx.set_state(indoc! {"
 7418        one.twoˇ
 7419    "});
 7420
 7421    // The format request takes a long time. When it completes, it inserts
 7422    // a newline and an indent before the `.`
 7423    cx.lsp
 7424        .handle_request::<lsp::request::Formatting, _, _>(move |_, cx| {
 7425            let executor = cx.background_executor().clone();
 7426            async move {
 7427                executor.timer(Duration::from_millis(100)).await;
 7428                Ok(Some(vec![lsp::TextEdit {
 7429                    range: lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(0, 3)),
 7430                    new_text: "\n    ".into(),
 7431                }]))
 7432            }
 7433        });
 7434
 7435    // Submit a format request.
 7436    let format_1 = cx
 7437        .update_editor(|editor, cx| editor.format(&Format, cx))
 7438        .unwrap();
 7439    cx.executor().run_until_parked();
 7440
 7441    // Submit a second format request.
 7442    let format_2 = cx
 7443        .update_editor(|editor, cx| editor.format(&Format, cx))
 7444        .unwrap();
 7445    cx.executor().run_until_parked();
 7446
 7447    // Wait for both format requests to complete
 7448    cx.executor().advance_clock(Duration::from_millis(200));
 7449    cx.executor().start_waiting();
 7450    format_1.await.unwrap();
 7451    cx.executor().start_waiting();
 7452    format_2.await.unwrap();
 7453
 7454    // The formatting edits only happens once.
 7455    cx.assert_editor_state(indoc! {"
 7456        one
 7457            .twoˇ
 7458    "});
 7459}
 7460
 7461#[gpui::test]
 7462async fn test_strip_whitespace_and_format_via_lsp(cx: &mut gpui::TestAppContext) {
 7463    init_test(cx, |settings| {
 7464        settings.defaults.formatter = Some(language_settings::SelectedFormatter::Auto)
 7465    });
 7466
 7467    let mut cx = EditorLspTestContext::new_rust(
 7468        lsp::ServerCapabilities {
 7469            document_formatting_provider: Some(lsp::OneOf::Left(true)),
 7470            ..Default::default()
 7471        },
 7472        cx,
 7473    )
 7474    .await;
 7475
 7476    // Set up a buffer white some trailing whitespace and no trailing newline.
 7477    cx.set_state(
 7478        &[
 7479            "one ",   //
 7480            "twoˇ",   //
 7481            "three ", //
 7482            "four",   //
 7483        ]
 7484        .join("\n"),
 7485    );
 7486
 7487    // Submit a format request.
 7488    let format = cx
 7489        .update_editor(|editor, cx| editor.format(&Format, cx))
 7490        .unwrap();
 7491
 7492    // Record which buffer changes have been sent to the language server
 7493    let buffer_changes = Arc::new(Mutex::new(Vec::new()));
 7494    cx.lsp
 7495        .handle_notification::<lsp::notification::DidChangeTextDocument, _>({
 7496            let buffer_changes = buffer_changes.clone();
 7497            move |params, _| {
 7498                buffer_changes.lock().extend(
 7499                    params
 7500                        .content_changes
 7501                        .into_iter()
 7502                        .map(|e| (e.range.unwrap(), e.text)),
 7503                );
 7504            }
 7505        });
 7506
 7507    // Handle formatting requests to the language server.
 7508    cx.lsp.handle_request::<lsp::request::Formatting, _, _>({
 7509        let buffer_changes = buffer_changes.clone();
 7510        move |_, _| {
 7511            // When formatting is requested, trailing whitespace has already been stripped,
 7512            // and the trailing newline has already been added.
 7513            assert_eq!(
 7514                &buffer_changes.lock()[1..],
 7515                &[
 7516                    (
 7517                        lsp::Range::new(lsp::Position::new(0, 3), lsp::Position::new(0, 4)),
 7518                        "".into()
 7519                    ),
 7520                    (
 7521                        lsp::Range::new(lsp::Position::new(2, 5), lsp::Position::new(2, 6)),
 7522                        "".into()
 7523                    ),
 7524                    (
 7525                        lsp::Range::new(lsp::Position::new(3, 4), lsp::Position::new(3, 4)),
 7526                        "\n".into()
 7527                    ),
 7528                ]
 7529            );
 7530
 7531            // Insert blank lines between each line of the buffer.
 7532            async move {
 7533                Ok(Some(vec![
 7534                    lsp::TextEdit {
 7535                        range: lsp::Range::new(lsp::Position::new(1, 0), lsp::Position::new(1, 0)),
 7536                        new_text: "\n".into(),
 7537                    },
 7538                    lsp::TextEdit {
 7539                        range: lsp::Range::new(lsp::Position::new(2, 0), lsp::Position::new(2, 0)),
 7540                        new_text: "\n".into(),
 7541                    },
 7542                ]))
 7543            }
 7544        }
 7545    });
 7546
 7547    // After formatting the buffer, the trailing whitespace is stripped,
 7548    // a newline is appended, and the edits provided by the language server
 7549    // have been applied.
 7550    format.await.unwrap();
 7551    cx.assert_editor_state(
 7552        &[
 7553            "one",   //
 7554            "",      //
 7555            "twoˇ",  //
 7556            "",      //
 7557            "three", //
 7558            "four",  //
 7559            "",      //
 7560        ]
 7561        .join("\n"),
 7562    );
 7563
 7564    // Undoing the formatting undoes the trailing whitespace removal, the
 7565    // trailing newline, and the LSP edits.
 7566    cx.update_buffer(|buffer, cx| buffer.undo(cx));
 7567    cx.assert_editor_state(
 7568        &[
 7569            "one ",   //
 7570            "twoˇ",   //
 7571            "three ", //
 7572            "four",   //
 7573        ]
 7574        .join("\n"),
 7575    );
 7576}
 7577
 7578#[gpui::test]
 7579async fn test_handle_input_for_show_signature_help_auto_signature_help_true(
 7580    cx: &mut gpui::TestAppContext,
 7581) {
 7582    init_test(cx, |_| {});
 7583
 7584    cx.update(|cx| {
 7585        cx.update_global::<SettingsStore, _>(|settings, cx| {
 7586            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 7587                settings.auto_signature_help = Some(true);
 7588            });
 7589        });
 7590    });
 7591
 7592    let mut cx = EditorLspTestContext::new_rust(
 7593        lsp::ServerCapabilities {
 7594            signature_help_provider: Some(lsp::SignatureHelpOptions {
 7595                ..Default::default()
 7596            }),
 7597            ..Default::default()
 7598        },
 7599        cx,
 7600    )
 7601    .await;
 7602
 7603    let language = Language::new(
 7604        LanguageConfig {
 7605            name: "Rust".into(),
 7606            brackets: BracketPairConfig {
 7607                pairs: vec![
 7608                    BracketPair {
 7609                        start: "{".to_string(),
 7610                        end: "}".to_string(),
 7611                        close: true,
 7612                        surround: true,
 7613                        newline: true,
 7614                    },
 7615                    BracketPair {
 7616                        start: "(".to_string(),
 7617                        end: ")".to_string(),
 7618                        close: true,
 7619                        surround: true,
 7620                        newline: true,
 7621                    },
 7622                    BracketPair {
 7623                        start: "/*".to_string(),
 7624                        end: " */".to_string(),
 7625                        close: true,
 7626                        surround: true,
 7627                        newline: true,
 7628                    },
 7629                    BracketPair {
 7630                        start: "[".to_string(),
 7631                        end: "]".to_string(),
 7632                        close: false,
 7633                        surround: false,
 7634                        newline: true,
 7635                    },
 7636                    BracketPair {
 7637                        start: "\"".to_string(),
 7638                        end: "\"".to_string(),
 7639                        close: true,
 7640                        surround: true,
 7641                        newline: false,
 7642                    },
 7643                    BracketPair {
 7644                        start: "<".to_string(),
 7645                        end: ">".to_string(),
 7646                        close: false,
 7647                        surround: true,
 7648                        newline: true,
 7649                    },
 7650                ],
 7651                ..Default::default()
 7652            },
 7653            autoclose_before: "})]".to_string(),
 7654            ..Default::default()
 7655        },
 7656        Some(tree_sitter_rust::LANGUAGE.into()),
 7657    );
 7658    let language = Arc::new(language);
 7659
 7660    cx.language_registry().add(language.clone());
 7661    cx.update_buffer(|buffer, cx| {
 7662        buffer.set_language(Some(language), cx);
 7663    });
 7664
 7665    cx.set_state(
 7666        &r#"
 7667            fn main() {
 7668                sampleˇ
 7669            }
 7670        "#
 7671        .unindent(),
 7672    );
 7673
 7674    cx.update_editor(|view, cx| {
 7675        view.handle_input("(", cx);
 7676    });
 7677    cx.assert_editor_state(
 7678        &"
 7679            fn main() {
 7680                sample(ˇ)
 7681            }
 7682        "
 7683        .unindent(),
 7684    );
 7685
 7686    let mocked_response = lsp::SignatureHelp {
 7687        signatures: vec![lsp::SignatureInformation {
 7688            label: "fn sample(param1: u8, param2: u8)".to_string(),
 7689            documentation: None,
 7690            parameters: Some(vec![
 7691                lsp::ParameterInformation {
 7692                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 7693                    documentation: None,
 7694                },
 7695                lsp::ParameterInformation {
 7696                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 7697                    documentation: None,
 7698                },
 7699            ]),
 7700            active_parameter: None,
 7701        }],
 7702        active_signature: Some(0),
 7703        active_parameter: Some(0),
 7704    };
 7705    handle_signature_help_request(&mut cx, mocked_response).await;
 7706
 7707    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 7708        .await;
 7709
 7710    cx.editor(|editor, _| {
 7711        let signature_help_state = editor.signature_help_state.popover().cloned();
 7712        assert!(signature_help_state.is_some());
 7713        let ParsedMarkdown {
 7714            text, highlights, ..
 7715        } = signature_help_state.unwrap().parsed_content;
 7716        assert_eq!(text, "param1: u8, param2: u8");
 7717        assert_eq!(highlights, vec![(0..10, SIGNATURE_HELP_HIGHLIGHT_CURRENT)]);
 7718    });
 7719}
 7720
 7721#[gpui::test]
 7722async fn test_handle_input_with_different_show_signature_settings(cx: &mut gpui::TestAppContext) {
 7723    init_test(cx, |_| {});
 7724
 7725    cx.update(|cx| {
 7726        cx.update_global::<SettingsStore, _>(|settings, cx| {
 7727            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 7728                settings.auto_signature_help = Some(false);
 7729                settings.show_signature_help_after_edits = Some(false);
 7730            });
 7731        });
 7732    });
 7733
 7734    let mut cx = EditorLspTestContext::new_rust(
 7735        lsp::ServerCapabilities {
 7736            signature_help_provider: Some(lsp::SignatureHelpOptions {
 7737                ..Default::default()
 7738            }),
 7739            ..Default::default()
 7740        },
 7741        cx,
 7742    )
 7743    .await;
 7744
 7745    let language = Language::new(
 7746        LanguageConfig {
 7747            name: "Rust".into(),
 7748            brackets: BracketPairConfig {
 7749                pairs: vec![
 7750                    BracketPair {
 7751                        start: "{".to_string(),
 7752                        end: "}".to_string(),
 7753                        close: true,
 7754                        surround: true,
 7755                        newline: true,
 7756                    },
 7757                    BracketPair {
 7758                        start: "(".to_string(),
 7759                        end: ")".to_string(),
 7760                        close: true,
 7761                        surround: true,
 7762                        newline: true,
 7763                    },
 7764                    BracketPair {
 7765                        start: "/*".to_string(),
 7766                        end: " */".to_string(),
 7767                        close: true,
 7768                        surround: true,
 7769                        newline: true,
 7770                    },
 7771                    BracketPair {
 7772                        start: "[".to_string(),
 7773                        end: "]".to_string(),
 7774                        close: false,
 7775                        surround: false,
 7776                        newline: true,
 7777                    },
 7778                    BracketPair {
 7779                        start: "\"".to_string(),
 7780                        end: "\"".to_string(),
 7781                        close: true,
 7782                        surround: true,
 7783                        newline: false,
 7784                    },
 7785                    BracketPair {
 7786                        start: "<".to_string(),
 7787                        end: ">".to_string(),
 7788                        close: false,
 7789                        surround: true,
 7790                        newline: true,
 7791                    },
 7792                ],
 7793                ..Default::default()
 7794            },
 7795            autoclose_before: "})]".to_string(),
 7796            ..Default::default()
 7797        },
 7798        Some(tree_sitter_rust::LANGUAGE.into()),
 7799    );
 7800    let language = Arc::new(language);
 7801
 7802    cx.language_registry().add(language.clone());
 7803    cx.update_buffer(|buffer, cx| {
 7804        buffer.set_language(Some(language), cx);
 7805    });
 7806
 7807    // Ensure that signature_help is not called when no signature help is enabled.
 7808    cx.set_state(
 7809        &r#"
 7810            fn main() {
 7811                sampleˇ
 7812            }
 7813        "#
 7814        .unindent(),
 7815    );
 7816    cx.update_editor(|view, cx| {
 7817        view.handle_input("(", cx);
 7818    });
 7819    cx.assert_editor_state(
 7820        &"
 7821            fn main() {
 7822                sample(ˇ)
 7823            }
 7824        "
 7825        .unindent(),
 7826    );
 7827    cx.editor(|editor, _| {
 7828        assert!(editor.signature_help_state.task().is_none());
 7829    });
 7830
 7831    let mocked_response = lsp::SignatureHelp {
 7832        signatures: vec![lsp::SignatureInformation {
 7833            label: "fn sample(param1: u8, param2: u8)".to_string(),
 7834            documentation: None,
 7835            parameters: Some(vec![
 7836                lsp::ParameterInformation {
 7837                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 7838                    documentation: None,
 7839                },
 7840                lsp::ParameterInformation {
 7841                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 7842                    documentation: None,
 7843                },
 7844            ]),
 7845            active_parameter: None,
 7846        }],
 7847        active_signature: Some(0),
 7848        active_parameter: Some(0),
 7849    };
 7850
 7851    // Ensure that signature_help is called when enabled afte edits
 7852    cx.update(|cx| {
 7853        cx.update_global::<SettingsStore, _>(|settings, cx| {
 7854            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 7855                settings.auto_signature_help = Some(false);
 7856                settings.show_signature_help_after_edits = Some(true);
 7857            });
 7858        });
 7859    });
 7860    cx.set_state(
 7861        &r#"
 7862            fn main() {
 7863                sampleˇ
 7864            }
 7865        "#
 7866        .unindent(),
 7867    );
 7868    cx.update_editor(|view, cx| {
 7869        view.handle_input("(", cx);
 7870    });
 7871    cx.assert_editor_state(
 7872        &"
 7873            fn main() {
 7874                sample(ˇ)
 7875            }
 7876        "
 7877        .unindent(),
 7878    );
 7879    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 7880    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 7881        .await;
 7882    cx.update_editor(|editor, _| {
 7883        let signature_help_state = editor.signature_help_state.popover().cloned();
 7884        assert!(signature_help_state.is_some());
 7885        let ParsedMarkdown {
 7886            text, highlights, ..
 7887        } = signature_help_state.unwrap().parsed_content;
 7888        assert_eq!(text, "param1: u8, param2: u8");
 7889        assert_eq!(highlights, vec![(0..10, SIGNATURE_HELP_HIGHLIGHT_CURRENT)]);
 7890        editor.signature_help_state = SignatureHelpState::default();
 7891    });
 7892
 7893    // Ensure that signature_help is called when auto signature help override is enabled
 7894    cx.update(|cx| {
 7895        cx.update_global::<SettingsStore, _>(|settings, cx| {
 7896            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 7897                settings.auto_signature_help = Some(true);
 7898                settings.show_signature_help_after_edits = Some(false);
 7899            });
 7900        });
 7901    });
 7902    cx.set_state(
 7903        &r#"
 7904            fn main() {
 7905                sampleˇ
 7906            }
 7907        "#
 7908        .unindent(),
 7909    );
 7910    cx.update_editor(|view, cx| {
 7911        view.handle_input("(", cx);
 7912    });
 7913    cx.assert_editor_state(
 7914        &"
 7915            fn main() {
 7916                sample(ˇ)
 7917            }
 7918        "
 7919        .unindent(),
 7920    );
 7921    handle_signature_help_request(&mut cx, mocked_response).await;
 7922    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 7923        .await;
 7924    cx.editor(|editor, _| {
 7925        let signature_help_state = editor.signature_help_state.popover().cloned();
 7926        assert!(signature_help_state.is_some());
 7927        let ParsedMarkdown {
 7928            text, highlights, ..
 7929        } = signature_help_state.unwrap().parsed_content;
 7930        assert_eq!(text, "param1: u8, param2: u8");
 7931        assert_eq!(highlights, vec![(0..10, SIGNATURE_HELP_HIGHLIGHT_CURRENT)]);
 7932    });
 7933}
 7934
 7935#[gpui::test]
 7936async fn test_signature_help(cx: &mut gpui::TestAppContext) {
 7937    init_test(cx, |_| {});
 7938    cx.update(|cx| {
 7939        cx.update_global::<SettingsStore, _>(|settings, cx| {
 7940            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 7941                settings.auto_signature_help = Some(true);
 7942            });
 7943        });
 7944    });
 7945
 7946    let mut cx = EditorLspTestContext::new_rust(
 7947        lsp::ServerCapabilities {
 7948            signature_help_provider: Some(lsp::SignatureHelpOptions {
 7949                ..Default::default()
 7950            }),
 7951            ..Default::default()
 7952        },
 7953        cx,
 7954    )
 7955    .await;
 7956
 7957    // A test that directly calls `show_signature_help`
 7958    cx.update_editor(|editor, cx| {
 7959        editor.show_signature_help(&ShowSignatureHelp, cx);
 7960    });
 7961
 7962    let mocked_response = lsp::SignatureHelp {
 7963        signatures: vec![lsp::SignatureInformation {
 7964            label: "fn sample(param1: u8, param2: u8)".to_string(),
 7965            documentation: None,
 7966            parameters: Some(vec![
 7967                lsp::ParameterInformation {
 7968                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 7969                    documentation: None,
 7970                },
 7971                lsp::ParameterInformation {
 7972                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 7973                    documentation: None,
 7974                },
 7975            ]),
 7976            active_parameter: None,
 7977        }],
 7978        active_signature: Some(0),
 7979        active_parameter: Some(0),
 7980    };
 7981    handle_signature_help_request(&mut cx, mocked_response).await;
 7982
 7983    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 7984        .await;
 7985
 7986    cx.editor(|editor, _| {
 7987        let signature_help_state = editor.signature_help_state.popover().cloned();
 7988        assert!(signature_help_state.is_some());
 7989        let ParsedMarkdown {
 7990            text, highlights, ..
 7991        } = signature_help_state.unwrap().parsed_content;
 7992        assert_eq!(text, "param1: u8, param2: u8");
 7993        assert_eq!(highlights, vec![(0..10, SIGNATURE_HELP_HIGHLIGHT_CURRENT)]);
 7994    });
 7995
 7996    // When exiting outside from inside the brackets, `signature_help` is closed.
 7997    cx.set_state(indoc! {"
 7998        fn main() {
 7999            sample(ˇ);
 8000        }
 8001
 8002        fn sample(param1: u8, param2: u8) {}
 8003    "});
 8004
 8005    cx.update_editor(|editor, cx| {
 8006        editor.change_selections(None, cx, |s| s.select_ranges([0..0]));
 8007    });
 8008
 8009    let mocked_response = lsp::SignatureHelp {
 8010        signatures: Vec::new(),
 8011        active_signature: None,
 8012        active_parameter: None,
 8013    };
 8014    handle_signature_help_request(&mut cx, mocked_response).await;
 8015
 8016    cx.condition(|editor, _| !editor.signature_help_state.is_shown())
 8017        .await;
 8018
 8019    cx.editor(|editor, _| {
 8020        assert!(!editor.signature_help_state.is_shown());
 8021    });
 8022
 8023    // When entering inside the brackets from outside, `show_signature_help` is automatically called.
 8024    cx.set_state(indoc! {"
 8025        fn main() {
 8026            sample(ˇ);
 8027        }
 8028
 8029        fn sample(param1: u8, param2: u8) {}
 8030    "});
 8031
 8032    let mocked_response = lsp::SignatureHelp {
 8033        signatures: vec![lsp::SignatureInformation {
 8034            label: "fn sample(param1: u8, param2: u8)".to_string(),
 8035            documentation: None,
 8036            parameters: Some(vec![
 8037                lsp::ParameterInformation {
 8038                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 8039                    documentation: None,
 8040                },
 8041                lsp::ParameterInformation {
 8042                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 8043                    documentation: None,
 8044                },
 8045            ]),
 8046            active_parameter: None,
 8047        }],
 8048        active_signature: Some(0),
 8049        active_parameter: Some(0),
 8050    };
 8051    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 8052    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 8053        .await;
 8054    cx.editor(|editor, _| {
 8055        assert!(editor.signature_help_state.is_shown());
 8056    });
 8057
 8058    // Restore the popover with more parameter input
 8059    cx.set_state(indoc! {"
 8060        fn main() {
 8061            sample(param1, param2ˇ);
 8062        }
 8063
 8064        fn sample(param1: u8, param2: u8) {}
 8065    "});
 8066
 8067    let mocked_response = lsp::SignatureHelp {
 8068        signatures: vec![lsp::SignatureInformation {
 8069            label: "fn sample(param1: u8, param2: u8)".to_string(),
 8070            documentation: None,
 8071            parameters: Some(vec![
 8072                lsp::ParameterInformation {
 8073                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 8074                    documentation: None,
 8075                },
 8076                lsp::ParameterInformation {
 8077                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 8078                    documentation: None,
 8079                },
 8080            ]),
 8081            active_parameter: None,
 8082        }],
 8083        active_signature: Some(0),
 8084        active_parameter: Some(1),
 8085    };
 8086    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 8087    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 8088        .await;
 8089
 8090    // When selecting a range, the popover is gone.
 8091    // Avoid using `cx.set_state` to not actually edit the document, just change its selections.
 8092    cx.update_editor(|editor, cx| {
 8093        editor.change_selections(None, cx, |s| {
 8094            s.select_ranges(Some(Point::new(1, 25)..Point::new(1, 19)));
 8095        })
 8096    });
 8097    cx.assert_editor_state(indoc! {"
 8098        fn main() {
 8099            sample(param1, «ˇparam2»);
 8100        }
 8101
 8102        fn sample(param1: u8, param2: u8) {}
 8103    "});
 8104    cx.editor(|editor, _| {
 8105        assert!(!editor.signature_help_state.is_shown());
 8106    });
 8107
 8108    // When unselecting again, the popover is back if within the brackets.
 8109    cx.update_editor(|editor, cx| {
 8110        editor.change_selections(None, cx, |s| {
 8111            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 8112        })
 8113    });
 8114    cx.assert_editor_state(indoc! {"
 8115        fn main() {
 8116            sample(param1, ˇparam2);
 8117        }
 8118
 8119        fn sample(param1: u8, param2: u8) {}
 8120    "});
 8121    handle_signature_help_request(&mut cx, mocked_response).await;
 8122    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 8123        .await;
 8124    cx.editor(|editor, _| {
 8125        assert!(editor.signature_help_state.is_shown());
 8126    });
 8127
 8128    // Test to confirm that SignatureHelp does not appear after deselecting multiple ranges when it was hidden by pressing Escape.
 8129    cx.update_editor(|editor, cx| {
 8130        editor.change_selections(None, cx, |s| {
 8131            s.select_ranges(Some(Point::new(0, 0)..Point::new(0, 0)));
 8132            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 8133        })
 8134    });
 8135    cx.assert_editor_state(indoc! {"
 8136        fn main() {
 8137            sample(param1, ˇparam2);
 8138        }
 8139
 8140        fn sample(param1: u8, param2: u8) {}
 8141    "});
 8142
 8143    let mocked_response = lsp::SignatureHelp {
 8144        signatures: vec![lsp::SignatureInformation {
 8145            label: "fn sample(param1: u8, param2: u8)".to_string(),
 8146            documentation: None,
 8147            parameters: Some(vec![
 8148                lsp::ParameterInformation {
 8149                    label: lsp::ParameterLabel::Simple("param1: u8".to_string()),
 8150                    documentation: None,
 8151                },
 8152                lsp::ParameterInformation {
 8153                    label: lsp::ParameterLabel::Simple("param2: u8".to_string()),
 8154                    documentation: None,
 8155                },
 8156            ]),
 8157            active_parameter: None,
 8158        }],
 8159        active_signature: Some(0),
 8160        active_parameter: Some(1),
 8161    };
 8162    handle_signature_help_request(&mut cx, mocked_response.clone()).await;
 8163    cx.condition(|editor, _| editor.signature_help_state.is_shown())
 8164        .await;
 8165    cx.update_editor(|editor, cx| {
 8166        editor.hide_signature_help(cx, SignatureHelpHiddenBy::Escape);
 8167    });
 8168    cx.condition(|editor, _| !editor.signature_help_state.is_shown())
 8169        .await;
 8170    cx.update_editor(|editor, cx| {
 8171        editor.change_selections(None, cx, |s| {
 8172            s.select_ranges(Some(Point::new(1, 25)..Point::new(1, 19)));
 8173        })
 8174    });
 8175    cx.assert_editor_state(indoc! {"
 8176        fn main() {
 8177            sample(param1, «ˇparam2»);
 8178        }
 8179
 8180        fn sample(param1: u8, param2: u8) {}
 8181    "});
 8182    cx.update_editor(|editor, cx| {
 8183        editor.change_selections(None, cx, |s| {
 8184            s.select_ranges(Some(Point::new(1, 19)..Point::new(1, 19)));
 8185        })
 8186    });
 8187    cx.assert_editor_state(indoc! {"
 8188        fn main() {
 8189            sample(param1, ˇparam2);
 8190        }
 8191
 8192        fn sample(param1: u8, param2: u8) {}
 8193    "});
 8194    cx.condition(|editor, _| !editor.signature_help_state.is_shown()) // because hidden by escape
 8195        .await;
 8196}
 8197
 8198#[gpui::test]
 8199async fn test_completion(cx: &mut gpui::TestAppContext) {
 8200    init_test(cx, |_| {});
 8201
 8202    let mut cx = EditorLspTestContext::new_rust(
 8203        lsp::ServerCapabilities {
 8204            completion_provider: Some(lsp::CompletionOptions {
 8205                trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
 8206                resolve_provider: Some(true),
 8207                ..Default::default()
 8208            }),
 8209            signature_help_provider: Some(lsp::SignatureHelpOptions::default()),
 8210            ..Default::default()
 8211        },
 8212        cx,
 8213    )
 8214    .await;
 8215    let counter = Arc::new(AtomicUsize::new(0));
 8216
 8217    cx.set_state(indoc! {"
 8218        oneˇ
 8219        two
 8220        three
 8221    "});
 8222    cx.simulate_keystroke(".");
 8223    handle_completion_request(
 8224        &mut cx,
 8225        indoc! {"
 8226            one.|<>
 8227            two
 8228            three
 8229        "},
 8230        vec!["first_completion", "second_completion"],
 8231        counter.clone(),
 8232    )
 8233    .await;
 8234    cx.condition(|editor, _| editor.context_menu_visible())
 8235        .await;
 8236    assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
 8237
 8238    let _handler = handle_signature_help_request(
 8239        &mut cx,
 8240        lsp::SignatureHelp {
 8241            signatures: vec![lsp::SignatureInformation {
 8242                label: "test signature".to_string(),
 8243                documentation: None,
 8244                parameters: Some(vec![lsp::ParameterInformation {
 8245                    label: lsp::ParameterLabel::Simple("foo: u8".to_string()),
 8246                    documentation: None,
 8247                }]),
 8248                active_parameter: None,
 8249            }],
 8250            active_signature: None,
 8251            active_parameter: None,
 8252        },
 8253    );
 8254    cx.update_editor(|editor, cx| {
 8255        assert!(
 8256            !editor.signature_help_state.is_shown(),
 8257            "No signature help was called for"
 8258        );
 8259        editor.show_signature_help(&ShowSignatureHelp, cx);
 8260    });
 8261    cx.run_until_parked();
 8262    cx.update_editor(|editor, _| {
 8263        assert!(
 8264            !editor.signature_help_state.is_shown(),
 8265            "No signature help should be shown when completions menu is open"
 8266        );
 8267    });
 8268
 8269    let apply_additional_edits = cx.update_editor(|editor, cx| {
 8270        editor.context_menu_next(&Default::default(), cx);
 8271        editor
 8272            .confirm_completion(&ConfirmCompletion::default(), cx)
 8273            .unwrap()
 8274    });
 8275    cx.assert_editor_state(indoc! {"
 8276        one.second_completionˇ
 8277        two
 8278        three
 8279    "});
 8280
 8281    handle_resolve_completion_request(
 8282        &mut cx,
 8283        Some(vec![
 8284            (
 8285                //This overlaps with the primary completion edit which is
 8286                //misbehavior from the LSP spec, test that we filter it out
 8287                indoc! {"
 8288                    one.second_ˇcompletion
 8289                    two
 8290                    threeˇ
 8291                "},
 8292                "overlapping additional edit",
 8293            ),
 8294            (
 8295                indoc! {"
 8296                    one.second_completion
 8297                    two
 8298                    threeˇ
 8299                "},
 8300                "\nadditional edit",
 8301            ),
 8302        ]),
 8303    )
 8304    .await;
 8305    apply_additional_edits.await.unwrap();
 8306    cx.assert_editor_state(indoc! {"
 8307        one.second_completionˇ
 8308        two
 8309        three
 8310        additional edit
 8311    "});
 8312
 8313    cx.set_state(indoc! {"
 8314        one.second_completion
 8315        twoˇ
 8316        threeˇ
 8317        additional edit
 8318    "});
 8319    cx.simulate_keystroke(" ");
 8320    assert!(cx.editor(|e, _| e.context_menu.read().is_none()));
 8321    cx.simulate_keystroke("s");
 8322    assert!(cx.editor(|e, _| e.context_menu.read().is_none()));
 8323
 8324    cx.assert_editor_state(indoc! {"
 8325        one.second_completion
 8326        two sˇ
 8327        three sˇ
 8328        additional edit
 8329    "});
 8330    handle_completion_request(
 8331        &mut cx,
 8332        indoc! {"
 8333            one.second_completion
 8334            two s
 8335            three <s|>
 8336            additional edit
 8337        "},
 8338        vec!["fourth_completion", "fifth_completion", "sixth_completion"],
 8339        counter.clone(),
 8340    )
 8341    .await;
 8342    cx.condition(|editor, _| editor.context_menu_visible())
 8343        .await;
 8344    assert_eq!(counter.load(atomic::Ordering::Acquire), 2);
 8345
 8346    cx.simulate_keystroke("i");
 8347
 8348    handle_completion_request(
 8349        &mut cx,
 8350        indoc! {"
 8351            one.second_completion
 8352            two si
 8353            three <si|>
 8354            additional edit
 8355        "},
 8356        vec!["fourth_completion", "fifth_completion", "sixth_completion"],
 8357        counter.clone(),
 8358    )
 8359    .await;
 8360    cx.condition(|editor, _| editor.context_menu_visible())
 8361        .await;
 8362    assert_eq!(counter.load(atomic::Ordering::Acquire), 3);
 8363
 8364    let apply_additional_edits = cx.update_editor(|editor, cx| {
 8365        editor
 8366            .confirm_completion(&ConfirmCompletion::default(), cx)
 8367            .unwrap()
 8368    });
 8369    cx.assert_editor_state(indoc! {"
 8370        one.second_completion
 8371        two sixth_completionˇ
 8372        three sixth_completionˇ
 8373        additional edit
 8374    "});
 8375
 8376    handle_resolve_completion_request(&mut cx, None).await;
 8377    apply_additional_edits.await.unwrap();
 8378
 8379    cx.update(|cx| {
 8380        cx.update_global::<SettingsStore, _>(|settings, cx| {
 8381            settings.update_user_settings::<EditorSettings>(cx, |settings| {
 8382                settings.show_completions_on_input = Some(false);
 8383            });
 8384        })
 8385    });
 8386    cx.set_state("editorˇ");
 8387    cx.simulate_keystroke(".");
 8388    assert!(cx.editor(|e, _| e.context_menu.read().is_none()));
 8389    cx.simulate_keystroke("c");
 8390    cx.simulate_keystroke("l");
 8391    cx.simulate_keystroke("o");
 8392    cx.assert_editor_state("editor.cloˇ");
 8393    assert!(cx.editor(|e, _| e.context_menu.read().is_none()));
 8394    cx.update_editor(|editor, cx| {
 8395        editor.show_completions(&ShowCompletions { trigger: None }, cx);
 8396    });
 8397    handle_completion_request(
 8398        &mut cx,
 8399        "editor.<clo|>",
 8400        vec!["close", "clobber"],
 8401        counter.clone(),
 8402    )
 8403    .await;
 8404    cx.condition(|editor, _| editor.context_menu_visible())
 8405        .await;
 8406    assert_eq!(counter.load(atomic::Ordering::Acquire), 4);
 8407
 8408    let apply_additional_edits = cx.update_editor(|editor, cx| {
 8409        editor
 8410            .confirm_completion(&ConfirmCompletion::default(), cx)
 8411            .unwrap()
 8412    });
 8413    cx.assert_editor_state("editor.closeˇ");
 8414    handle_resolve_completion_request(&mut cx, None).await;
 8415    apply_additional_edits.await.unwrap();
 8416}
 8417
 8418#[gpui::test]
 8419async fn test_completion_page_up_down_keys(cx: &mut gpui::TestAppContext) {
 8420    init_test(cx, |_| {});
 8421    let mut cx = EditorLspTestContext::new_rust(
 8422        lsp::ServerCapabilities {
 8423            completion_provider: Some(lsp::CompletionOptions {
 8424                trigger_characters: Some(vec![".".to_string()]),
 8425                ..Default::default()
 8426            }),
 8427            ..Default::default()
 8428        },
 8429        cx,
 8430    )
 8431    .await;
 8432    cx.lsp
 8433        .handle_request::<lsp::request::Completion, _, _>(move |_, _| async move {
 8434            Ok(Some(lsp::CompletionResponse::Array(vec![
 8435                lsp::CompletionItem {
 8436                    label: "first".into(),
 8437                    ..Default::default()
 8438                },
 8439                lsp::CompletionItem {
 8440                    label: "last".into(),
 8441                    ..Default::default()
 8442                },
 8443            ])))
 8444        });
 8445    cx.set_state("variableˇ");
 8446    cx.simulate_keystroke(".");
 8447    cx.executor().run_until_parked();
 8448
 8449    cx.update_editor(|editor, _| {
 8450        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
 8451            assert_eq!(
 8452                menu.matches.iter().map(|m| &m.string).collect::<Vec<_>>(),
 8453                &["first", "last"]
 8454            );
 8455        } else {
 8456            panic!("expected completion menu to be open");
 8457        }
 8458    });
 8459
 8460    cx.update_editor(|editor, cx| {
 8461        editor.move_page_down(&MovePageDown::default(), cx);
 8462        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
 8463            assert!(
 8464                menu.selected_item == 1,
 8465                "expected PageDown to select the last item from the context menu"
 8466            );
 8467        } else {
 8468            panic!("expected completion menu to stay open after PageDown");
 8469        }
 8470    });
 8471
 8472    cx.update_editor(|editor, cx| {
 8473        editor.move_page_up(&MovePageUp::default(), cx);
 8474        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
 8475            assert!(
 8476                menu.selected_item == 0,
 8477                "expected PageUp to select the first item from the context menu"
 8478            );
 8479        } else {
 8480            panic!("expected completion menu to stay open after PageUp");
 8481        }
 8482    });
 8483}
 8484
 8485#[gpui::test]
 8486async fn test_completion_sort(cx: &mut gpui::TestAppContext) {
 8487    init_test(cx, |_| {});
 8488    let mut cx = EditorLspTestContext::new_rust(
 8489        lsp::ServerCapabilities {
 8490            completion_provider: Some(lsp::CompletionOptions {
 8491                trigger_characters: Some(vec![".".to_string()]),
 8492                ..Default::default()
 8493            }),
 8494            ..Default::default()
 8495        },
 8496        cx,
 8497    )
 8498    .await;
 8499    cx.lsp
 8500        .handle_request::<lsp::request::Completion, _, _>(move |_, _| async move {
 8501            Ok(Some(lsp::CompletionResponse::Array(vec![
 8502                lsp::CompletionItem {
 8503                    label: "Range".into(),
 8504                    sort_text: Some("a".into()),
 8505                    ..Default::default()
 8506                },
 8507                lsp::CompletionItem {
 8508                    label: "r".into(),
 8509                    sort_text: Some("b".into()),
 8510                    ..Default::default()
 8511                },
 8512                lsp::CompletionItem {
 8513                    label: "ret".into(),
 8514                    sort_text: Some("c".into()),
 8515                    ..Default::default()
 8516                },
 8517                lsp::CompletionItem {
 8518                    label: "return".into(),
 8519                    sort_text: Some("d".into()),
 8520                    ..Default::default()
 8521                },
 8522                lsp::CompletionItem {
 8523                    label: "slice".into(),
 8524                    sort_text: Some("d".into()),
 8525                    ..Default::default()
 8526                },
 8527            ])))
 8528        });
 8529    cx.set_state("");
 8530    cx.executor().run_until_parked();
 8531    cx.update_editor(|editor, cx| {
 8532        editor.show_completions(
 8533            &ShowCompletions {
 8534                trigger: Some("r".into()),
 8535            },
 8536            cx,
 8537        );
 8538    });
 8539    cx.executor().run_until_parked();
 8540
 8541    cx.update_editor(|editor, _| {
 8542        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
 8543            assert_eq!(
 8544                menu.matches.iter().map(|m| &m.string).collect::<Vec<_>>(),
 8545                &["r", "ret", "Range", "return"]
 8546            );
 8547        } else {
 8548            panic!("expected completion menu to be open");
 8549        }
 8550    });
 8551}
 8552
 8553#[gpui::test]
 8554async fn test_no_duplicated_completion_requests(cx: &mut gpui::TestAppContext) {
 8555    init_test(cx, |_| {});
 8556
 8557    let mut cx = EditorLspTestContext::new_rust(
 8558        lsp::ServerCapabilities {
 8559            completion_provider: Some(lsp::CompletionOptions {
 8560                trigger_characters: Some(vec![".".to_string()]),
 8561                resolve_provider: Some(true),
 8562                ..Default::default()
 8563            }),
 8564            ..Default::default()
 8565        },
 8566        cx,
 8567    )
 8568    .await;
 8569
 8570    cx.set_state(indoc! {"fn main() { let a = 2ˇ; }"});
 8571    cx.simulate_keystroke(".");
 8572    let completion_item = lsp::CompletionItem {
 8573        label: "Some".into(),
 8574        kind: Some(lsp::CompletionItemKind::SNIPPET),
 8575        detail: Some("Wrap the expression in an `Option::Some`".to_string()),
 8576        documentation: Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
 8577            kind: lsp::MarkupKind::Markdown,
 8578            value: "```rust\nSome(2)\n```".to_string(),
 8579        })),
 8580        deprecated: Some(false),
 8581        sort_text: Some("Some".to_string()),
 8582        filter_text: Some("Some".to_string()),
 8583        insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
 8584        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
 8585            range: lsp::Range {
 8586                start: lsp::Position {
 8587                    line: 0,
 8588                    character: 22,
 8589                },
 8590                end: lsp::Position {
 8591                    line: 0,
 8592                    character: 22,
 8593                },
 8594            },
 8595            new_text: "Some(2)".to_string(),
 8596        })),
 8597        additional_text_edits: Some(vec![lsp::TextEdit {
 8598            range: lsp::Range {
 8599                start: lsp::Position {
 8600                    line: 0,
 8601                    character: 20,
 8602                },
 8603                end: lsp::Position {
 8604                    line: 0,
 8605                    character: 22,
 8606                },
 8607            },
 8608            new_text: "".to_string(),
 8609        }]),
 8610        ..Default::default()
 8611    };
 8612
 8613    let closure_completion_item = completion_item.clone();
 8614    let counter = Arc::new(AtomicUsize::new(0));
 8615    let counter_clone = counter.clone();
 8616    let mut request = cx.handle_request::<lsp::request::Completion, _, _>(move |_, _, _| {
 8617        let task_completion_item = closure_completion_item.clone();
 8618        counter_clone.fetch_add(1, atomic::Ordering::Release);
 8619        async move {
 8620            Ok(Some(lsp::CompletionResponse::Array(vec![
 8621                task_completion_item,
 8622            ])))
 8623        }
 8624    });
 8625
 8626    cx.condition(|editor, _| editor.context_menu_visible())
 8627        .await;
 8628    cx.assert_editor_state(indoc! {"fn main() { let a = 2.ˇ; }"});
 8629    assert!(request.next().await.is_some());
 8630    assert_eq!(counter.load(atomic::Ordering::Acquire), 1);
 8631
 8632    cx.simulate_keystroke("S");
 8633    cx.simulate_keystroke("o");
 8634    cx.simulate_keystroke("m");
 8635    cx.condition(|editor, _| editor.context_menu_visible())
 8636        .await;
 8637    cx.assert_editor_state(indoc! {"fn main() { let a = 2.Somˇ; }"});
 8638    assert!(request.next().await.is_some());
 8639    assert!(request.next().await.is_some());
 8640    assert!(request.next().await.is_some());
 8641    request.close();
 8642    assert!(request.next().await.is_none());
 8643    assert_eq!(
 8644        counter.load(atomic::Ordering::Acquire),
 8645        4,
 8646        "With the completions menu open, only one LSP request should happen per input"
 8647    );
 8648}
 8649
 8650#[gpui::test]
 8651async fn test_toggle_comment(cx: &mut gpui::TestAppContext) {
 8652    init_test(cx, |_| {});
 8653    let mut cx = EditorTestContext::new(cx).await;
 8654    let language = Arc::new(Language::new(
 8655        LanguageConfig {
 8656            line_comments: vec!["// ".into(), "//! ".into(), "/// ".into()],
 8657            ..Default::default()
 8658        },
 8659        Some(tree_sitter_rust::LANGUAGE.into()),
 8660    ));
 8661    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 8662
 8663    // If multiple selections intersect a line, the line is only toggled once.
 8664    cx.set_state(indoc! {"
 8665        fn a() {
 8666            «//b();
 8667            ˇ»// «c();
 8668            //ˇ»  d();
 8669        }
 8670    "});
 8671
 8672    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8673
 8674    cx.assert_editor_state(indoc! {"
 8675        fn a() {
 8676            «b();
 8677            c();
 8678            ˇ» d();
 8679        }
 8680    "});
 8681
 8682    // The comment prefix is inserted at the same column for every line in a
 8683    // selection.
 8684    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8685
 8686    cx.assert_editor_state(indoc! {"
 8687        fn a() {
 8688            // «b();
 8689            // c();
 8690            ˇ»//  d();
 8691        }
 8692    "});
 8693
 8694    // If a selection ends at the beginning of a line, that line is not toggled.
 8695    cx.set_selections_state(indoc! {"
 8696        fn a() {
 8697            // b();
 8698            «// c();
 8699        ˇ»    //  d();
 8700        }
 8701    "});
 8702
 8703    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8704
 8705    cx.assert_editor_state(indoc! {"
 8706        fn a() {
 8707            // b();
 8708            «c();
 8709        ˇ»    //  d();
 8710        }
 8711    "});
 8712
 8713    // If a selection span a single line and is empty, the line is toggled.
 8714    cx.set_state(indoc! {"
 8715        fn a() {
 8716            a();
 8717            b();
 8718        ˇ
 8719        }
 8720    "});
 8721
 8722    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8723
 8724    cx.assert_editor_state(indoc! {"
 8725        fn a() {
 8726            a();
 8727            b();
 8728        //•ˇ
 8729        }
 8730    "});
 8731
 8732    // If a selection span multiple lines, empty lines are not toggled.
 8733    cx.set_state(indoc! {"
 8734        fn a() {
 8735            «a();
 8736
 8737            c();ˇ»
 8738        }
 8739    "});
 8740
 8741    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8742
 8743    cx.assert_editor_state(indoc! {"
 8744        fn a() {
 8745            // «a();
 8746
 8747            // c();ˇ»
 8748        }
 8749    "});
 8750
 8751    // If a selection includes multiple comment prefixes, all lines are uncommented.
 8752    cx.set_state(indoc! {"
 8753        fn a() {
 8754            «// a();
 8755            /// b();
 8756            //! c();ˇ»
 8757        }
 8758    "});
 8759
 8760    cx.update_editor(|e, cx| e.toggle_comments(&ToggleComments::default(), cx));
 8761
 8762    cx.assert_editor_state(indoc! {"
 8763        fn a() {
 8764            «a();
 8765            b();
 8766            c();ˇ»
 8767        }
 8768    "});
 8769}
 8770
 8771#[gpui::test]
 8772async fn test_toggle_comment_ignore_indent(cx: &mut gpui::TestAppContext) {
 8773    init_test(cx, |_| {});
 8774    let mut cx = EditorTestContext::new(cx).await;
 8775    let language = Arc::new(Language::new(
 8776        LanguageConfig {
 8777            line_comments: vec!["// ".into(), "//! ".into(), "/// ".into()],
 8778            ..Default::default()
 8779        },
 8780        Some(tree_sitter_rust::LANGUAGE.into()),
 8781    ));
 8782    cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
 8783
 8784    let toggle_comments = &ToggleComments {
 8785        advance_downwards: false,
 8786        ignore_indent: true,
 8787    };
 8788
 8789    // If multiple selections intersect a line, the line is only toggled once.
 8790    cx.set_state(indoc! {"
 8791        fn a() {
 8792        //    «b();
 8793        //    c();
 8794        //    ˇ» d();
 8795        }
 8796    "});
 8797
 8798    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8799
 8800    cx.assert_editor_state(indoc! {"
 8801        fn a() {
 8802            «b();
 8803            c();
 8804            ˇ» d();
 8805        }
 8806    "});
 8807
 8808    // The comment prefix is inserted at the beginning of each line
 8809    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8810
 8811    cx.assert_editor_state(indoc! {"
 8812        fn a() {
 8813        //    «b();
 8814        //    c();
 8815        //    ˇ» d();
 8816        }
 8817    "});
 8818
 8819    // If a selection ends at the beginning of a line, that line is not toggled.
 8820    cx.set_selections_state(indoc! {"
 8821        fn a() {
 8822        //    b();
 8823        //    «c();
 8824        ˇ»//     d();
 8825        }
 8826    "});
 8827
 8828    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8829
 8830    cx.assert_editor_state(indoc! {"
 8831        fn a() {
 8832        //    b();
 8833            «c();
 8834        ˇ»//     d();
 8835        }
 8836    "});
 8837
 8838    // If a selection span a single line and is empty, the line is toggled.
 8839    cx.set_state(indoc! {"
 8840        fn a() {
 8841            a();
 8842            b();
 8843        ˇ
 8844        }
 8845    "});
 8846
 8847    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8848
 8849    cx.assert_editor_state(indoc! {"
 8850        fn a() {
 8851            a();
 8852            b();
 8853        //ˇ
 8854        }
 8855    "});
 8856
 8857    // If a selection span multiple lines, empty lines are not toggled.
 8858    cx.set_state(indoc! {"
 8859        fn a() {
 8860            «a();
 8861
 8862            c();ˇ»
 8863        }
 8864    "});
 8865
 8866    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8867
 8868    cx.assert_editor_state(indoc! {"
 8869        fn a() {
 8870        //    «a();
 8871
 8872        //    c();ˇ»
 8873        }
 8874    "});
 8875
 8876    // If a selection includes multiple comment prefixes, all lines are uncommented.
 8877    cx.set_state(indoc! {"
 8878        fn a() {
 8879        //    «a();
 8880        ///    b();
 8881        //!    c();ˇ»
 8882        }
 8883    "});
 8884
 8885    cx.update_editor(|e, cx| e.toggle_comments(toggle_comments, cx));
 8886
 8887    cx.assert_editor_state(indoc! {"
 8888        fn a() {
 8889            «a();
 8890            b();
 8891            c();ˇ»
 8892        }
 8893    "});
 8894}
 8895
 8896#[gpui::test]
 8897async fn test_advance_downward_on_toggle_comment(cx: &mut gpui::TestAppContext) {
 8898    init_test(cx, |_| {});
 8899
 8900    let language = Arc::new(Language::new(
 8901        LanguageConfig {
 8902            line_comments: vec!["// ".into()],
 8903            ..Default::default()
 8904        },
 8905        Some(tree_sitter_rust::LANGUAGE.into()),
 8906    ));
 8907
 8908    let mut cx = EditorTestContext::new(cx).await;
 8909
 8910    cx.language_registry().add(language.clone());
 8911    cx.update_buffer(|buffer, cx| {
 8912        buffer.set_language(Some(language), cx);
 8913    });
 8914
 8915    let toggle_comments = &ToggleComments {
 8916        advance_downwards: true,
 8917        ignore_indent: false,
 8918    };
 8919
 8920    // Single cursor on one line -> advance
 8921    // Cursor moves horizontally 3 characters as well on non-blank line
 8922    cx.set_state(indoc!(
 8923        "fn a() {
 8924             ˇdog();
 8925             cat();
 8926        }"
 8927    ));
 8928    cx.update_editor(|editor, cx| {
 8929        editor.toggle_comments(toggle_comments, cx);
 8930    });
 8931    cx.assert_editor_state(indoc!(
 8932        "fn a() {
 8933             // dog();
 8934             catˇ();
 8935        }"
 8936    ));
 8937
 8938    // Single selection on one line -> don't advance
 8939    cx.set_state(indoc!(
 8940        "fn a() {
 8941             «dog()ˇ»;
 8942             cat();
 8943        }"
 8944    ));
 8945    cx.update_editor(|editor, cx| {
 8946        editor.toggle_comments(toggle_comments, cx);
 8947    });
 8948    cx.assert_editor_state(indoc!(
 8949        "fn a() {
 8950             // «dog()ˇ»;
 8951             cat();
 8952        }"
 8953    ));
 8954
 8955    // Multiple cursors on one line -> advance
 8956    cx.set_state(indoc!(
 8957        "fn a() {
 8958             ˇdˇog();
 8959             cat();
 8960        }"
 8961    ));
 8962    cx.update_editor(|editor, cx| {
 8963        editor.toggle_comments(toggle_comments, cx);
 8964    });
 8965    cx.assert_editor_state(indoc!(
 8966        "fn a() {
 8967             // dog();
 8968             catˇ(ˇ);
 8969        }"
 8970    ));
 8971
 8972    // Multiple cursors on one line, with selection -> don't advance
 8973    cx.set_state(indoc!(
 8974        "fn a() {
 8975             ˇdˇog«()ˇ»;
 8976             cat();
 8977        }"
 8978    ));
 8979    cx.update_editor(|editor, cx| {
 8980        editor.toggle_comments(toggle_comments, cx);
 8981    });
 8982    cx.assert_editor_state(indoc!(
 8983        "fn a() {
 8984             // ˇdˇog«()ˇ»;
 8985             cat();
 8986        }"
 8987    ));
 8988
 8989    // Single cursor on one line -> advance
 8990    // Cursor moves to column 0 on blank line
 8991    cx.set_state(indoc!(
 8992        "fn a() {
 8993             ˇdog();
 8994
 8995             cat();
 8996        }"
 8997    ));
 8998    cx.update_editor(|editor, cx| {
 8999        editor.toggle_comments(toggle_comments, cx);
 9000    });
 9001    cx.assert_editor_state(indoc!(
 9002        "fn a() {
 9003             // dog();
 9004        ˇ
 9005             cat();
 9006        }"
 9007    ));
 9008
 9009    // Single cursor on one line -> advance
 9010    // Cursor starts and ends at column 0
 9011    cx.set_state(indoc!(
 9012        "fn a() {
 9013         ˇ    dog();
 9014             cat();
 9015        }"
 9016    ));
 9017    cx.update_editor(|editor, cx| {
 9018        editor.toggle_comments(toggle_comments, cx);
 9019    });
 9020    cx.assert_editor_state(indoc!(
 9021        "fn a() {
 9022             // dog();
 9023         ˇ    cat();
 9024        }"
 9025    ));
 9026}
 9027
 9028#[gpui::test]
 9029async fn test_toggle_block_comment(cx: &mut gpui::TestAppContext) {
 9030    init_test(cx, |_| {});
 9031
 9032    let mut cx = EditorTestContext::new(cx).await;
 9033
 9034    let html_language = Arc::new(
 9035        Language::new(
 9036            LanguageConfig {
 9037                name: "HTML".into(),
 9038                block_comment: Some(("<!-- ".into(), " -->".into())),
 9039                ..Default::default()
 9040            },
 9041            Some(tree_sitter_html::language()),
 9042        )
 9043        .with_injection_query(
 9044            r#"
 9045            (script_element
 9046                (raw_text) @content
 9047                (#set! "language" "javascript"))
 9048            "#,
 9049        )
 9050        .unwrap(),
 9051    );
 9052
 9053    let javascript_language = Arc::new(Language::new(
 9054        LanguageConfig {
 9055            name: "JavaScript".into(),
 9056            line_comments: vec!["// ".into()],
 9057            ..Default::default()
 9058        },
 9059        Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
 9060    ));
 9061
 9062    cx.language_registry().add(html_language.clone());
 9063    cx.language_registry().add(javascript_language.clone());
 9064    cx.update_buffer(|buffer, cx| {
 9065        buffer.set_language(Some(html_language), cx);
 9066    });
 9067
 9068    // Toggle comments for empty selections
 9069    cx.set_state(
 9070        &r#"
 9071            <p>A</p>ˇ
 9072            <p>B</p>ˇ
 9073            <p>C</p>ˇ
 9074        "#
 9075        .unindent(),
 9076    );
 9077    cx.update_editor(|editor, cx| editor.toggle_comments(&ToggleComments::default(), cx));
 9078    cx.assert_editor_state(
 9079        &r#"
 9080            <!-- <p>A</p>ˇ -->
 9081            <!-- <p>B</p>ˇ -->
 9082            <!-- <p>C</p>ˇ -->
 9083        "#
 9084        .unindent(),
 9085    );
 9086    cx.update_editor(|editor, cx| editor.toggle_comments(&ToggleComments::default(), cx));
 9087    cx.assert_editor_state(
 9088        &r#"
 9089            <p>A</p>ˇ
 9090            <p>B</p>ˇ
 9091            <p>C</p>ˇ
 9092        "#
 9093        .unindent(),
 9094    );
 9095
 9096    // Toggle comments for mixture of empty and non-empty selections, where
 9097    // multiple selections occupy a given line.
 9098    cx.set_state(
 9099        &r#"
 9100            <p>A«</p>
 9101            <p>ˇ»B</p>ˇ
 9102            <p>C«</p>
 9103            <p>ˇ»D</p>ˇ
 9104        "#
 9105        .unindent(),
 9106    );
 9107
 9108    cx.update_editor(|editor, cx| editor.toggle_comments(&ToggleComments::default(), cx));
 9109    cx.assert_editor_state(
 9110        &r#"
 9111            <!-- <p>A«</p>
 9112            <p>ˇ»B</p>ˇ -->
 9113            <!-- <p>C«</p>
 9114            <p>ˇ»D</p>ˇ -->
 9115        "#
 9116        .unindent(),
 9117    );
 9118    cx.update_editor(|editor, cx| editor.toggle_comments(&ToggleComments::default(), cx));
 9119    cx.assert_editor_state(
 9120        &r#"
 9121            <p>A«</p>
 9122            <p>ˇ»B</p>ˇ
 9123            <p>C«</p>
 9124            <p>ˇ»D</p>ˇ
 9125        "#
 9126        .unindent(),
 9127    );
 9128
 9129    // Toggle comments when different languages are active for different
 9130    // selections.
 9131    cx.set_state(
 9132        &r#"
 9133            ˇ<script>
 9134                ˇvar x = new Y();
 9135            ˇ</script>
 9136        "#
 9137        .unindent(),
 9138    );
 9139    cx.executor().run_until_parked();
 9140    cx.update_editor(|editor, cx| editor.toggle_comments(&ToggleComments::default(), cx));
 9141    // TODO this is how it actually worked in Zed Stable, which is not very ergonomic.
 9142    // Uncommenting and commenting from this position brings in even more wrong artifacts.
 9143    cx.assert_editor_state(
 9144        &r#"
 9145            <!-- ˇ<script> -->
 9146                // ˇvar x = new Y();
 9147            // ˇ</script>
 9148        "#
 9149        .unindent(),
 9150    );
 9151}
 9152
 9153#[gpui::test]
 9154fn test_editing_disjoint_excerpts(cx: &mut TestAppContext) {
 9155    init_test(cx, |_| {});
 9156
 9157    let buffer = cx.new_model(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
 9158    let multibuffer = cx.new_model(|cx| {
 9159        let mut multibuffer = MultiBuffer::new(ReadWrite);
 9160        multibuffer.push_excerpts(
 9161            buffer.clone(),
 9162            [
 9163                ExcerptRange {
 9164                    context: Point::new(0, 0)..Point::new(0, 4),
 9165                    primary: None,
 9166                },
 9167                ExcerptRange {
 9168                    context: Point::new(1, 0)..Point::new(1, 4),
 9169                    primary: None,
 9170                },
 9171            ],
 9172            cx,
 9173        );
 9174        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb");
 9175        multibuffer
 9176    });
 9177
 9178    let (view, cx) = cx.add_window_view(|cx| build_editor(multibuffer, cx));
 9179    view.update(cx, |view, cx| {
 9180        assert_eq!(view.text(cx), "aaaa\nbbbb");
 9181        view.change_selections(None, cx, |s| {
 9182            s.select_ranges([
 9183                Point::new(0, 0)..Point::new(0, 0),
 9184                Point::new(1, 0)..Point::new(1, 0),
 9185            ])
 9186        });
 9187
 9188        view.handle_input("X", cx);
 9189        assert_eq!(view.text(cx), "Xaaaa\nXbbbb");
 9190        assert_eq!(
 9191            view.selections.ranges(cx),
 9192            [
 9193                Point::new(0, 1)..Point::new(0, 1),
 9194                Point::new(1, 1)..Point::new(1, 1),
 9195            ]
 9196        );
 9197
 9198        // Ensure the cursor's head is respected when deleting across an excerpt boundary.
 9199        view.change_selections(None, cx, |s| {
 9200            s.select_ranges([Point::new(0, 2)..Point::new(1, 2)])
 9201        });
 9202        view.backspace(&Default::default(), cx);
 9203        assert_eq!(view.text(cx), "Xa\nbbb");
 9204        assert_eq!(
 9205            view.selections.ranges(cx),
 9206            [Point::new(1, 0)..Point::new(1, 0)]
 9207        );
 9208
 9209        view.change_selections(None, cx, |s| {
 9210            s.select_ranges([Point::new(1, 1)..Point::new(0, 1)])
 9211        });
 9212        view.backspace(&Default::default(), cx);
 9213        assert_eq!(view.text(cx), "X\nbb");
 9214        assert_eq!(
 9215            view.selections.ranges(cx),
 9216            [Point::new(0, 1)..Point::new(0, 1)]
 9217        );
 9218    });
 9219}
 9220
 9221#[gpui::test]
 9222fn test_editing_overlapping_excerpts(cx: &mut TestAppContext) {
 9223    init_test(cx, |_| {});
 9224
 9225    let markers = vec![('[', ']').into(), ('(', ')').into()];
 9226    let (initial_text, mut excerpt_ranges) = marked_text_ranges_by(
 9227        indoc! {"
 9228            [aaaa
 9229            (bbbb]
 9230            cccc)",
 9231        },
 9232        markers.clone(),
 9233    );
 9234    let excerpt_ranges = markers.into_iter().map(|marker| {
 9235        let context = excerpt_ranges.remove(&marker).unwrap()[0].clone();
 9236        ExcerptRange {
 9237            context,
 9238            primary: None,
 9239        }
 9240    });
 9241    let buffer = cx.new_model(|cx| Buffer::local(initial_text, cx));
 9242    let multibuffer = cx.new_model(|cx| {
 9243        let mut multibuffer = MultiBuffer::new(ReadWrite);
 9244        multibuffer.push_excerpts(buffer, excerpt_ranges, cx);
 9245        multibuffer
 9246    });
 9247
 9248    let (view, cx) = cx.add_window_view(|cx| build_editor(multibuffer, cx));
 9249    view.update(cx, |view, cx| {
 9250        let (expected_text, selection_ranges) = marked_text_ranges(
 9251            indoc! {"
 9252                aaaa
 9253                bˇbbb
 9254                bˇbbˇb
 9255                cccc"
 9256            },
 9257            true,
 9258        );
 9259        assert_eq!(view.text(cx), expected_text);
 9260        view.change_selections(None, cx, |s| s.select_ranges(selection_ranges));
 9261
 9262        view.handle_input("X", cx);
 9263
 9264        let (expected_text, expected_selections) = marked_text_ranges(
 9265            indoc! {"
 9266                aaaa
 9267                bXˇbbXb
 9268                bXˇbbXˇb
 9269                cccc"
 9270            },
 9271            false,
 9272        );
 9273        assert_eq!(view.text(cx), expected_text);
 9274        assert_eq!(view.selections.ranges(cx), expected_selections);
 9275
 9276        view.newline(&Newline, cx);
 9277        let (expected_text, expected_selections) = marked_text_ranges(
 9278            indoc! {"
 9279                aaaa
 9280                bX
 9281                ˇbbX
 9282                b
 9283                bX
 9284                ˇbbX
 9285                ˇb
 9286                cccc"
 9287            },
 9288            false,
 9289        );
 9290        assert_eq!(view.text(cx), expected_text);
 9291        assert_eq!(view.selections.ranges(cx), expected_selections);
 9292    });
 9293}
 9294
 9295#[gpui::test]
 9296fn test_refresh_selections(cx: &mut TestAppContext) {
 9297    init_test(cx, |_| {});
 9298
 9299    let buffer = cx.new_model(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
 9300    let mut excerpt1_id = None;
 9301    let multibuffer = cx.new_model(|cx| {
 9302        let mut multibuffer = MultiBuffer::new(ReadWrite);
 9303        excerpt1_id = multibuffer
 9304            .push_excerpts(
 9305                buffer.clone(),
 9306                [
 9307                    ExcerptRange {
 9308                        context: Point::new(0, 0)..Point::new(1, 4),
 9309                        primary: None,
 9310                    },
 9311                    ExcerptRange {
 9312                        context: Point::new(1, 0)..Point::new(2, 4),
 9313                        primary: None,
 9314                    },
 9315                ],
 9316                cx,
 9317            )
 9318            .into_iter()
 9319            .next();
 9320        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb\nbbbb\ncccc");
 9321        multibuffer
 9322    });
 9323
 9324    let editor = cx.add_window(|cx| {
 9325        let mut editor = build_editor(multibuffer.clone(), cx);
 9326        let snapshot = editor.snapshot(cx);
 9327        editor.change_selections(None, cx, |s| {
 9328            s.select_ranges([Point::new(1, 3)..Point::new(1, 3)])
 9329        });
 9330        editor.begin_selection(Point::new(2, 1).to_display_point(&snapshot), true, 1, cx);
 9331        assert_eq!(
 9332            editor.selections.ranges(cx),
 9333            [
 9334                Point::new(1, 3)..Point::new(1, 3),
 9335                Point::new(2, 1)..Point::new(2, 1),
 9336            ]
 9337        );
 9338        editor
 9339    });
 9340
 9341    // Refreshing selections is a no-op when excerpts haven't changed.
 9342    _ = editor.update(cx, |editor, cx| {
 9343        editor.change_selections(None, cx, |s| s.refresh());
 9344        assert_eq!(
 9345            editor.selections.ranges(cx),
 9346            [
 9347                Point::new(1, 3)..Point::new(1, 3),
 9348                Point::new(2, 1)..Point::new(2, 1),
 9349            ]
 9350        );
 9351    });
 9352
 9353    multibuffer.update(cx, |multibuffer, cx| {
 9354        multibuffer.remove_excerpts([excerpt1_id.unwrap()], cx);
 9355    });
 9356    _ = editor.update(cx, |editor, cx| {
 9357        // Removing an excerpt causes the first selection to become degenerate.
 9358        assert_eq!(
 9359            editor.selections.ranges(cx),
 9360            [
 9361                Point::new(0, 0)..Point::new(0, 0),
 9362                Point::new(0, 1)..Point::new(0, 1)
 9363            ]
 9364        );
 9365
 9366        // Refreshing selections will relocate the first selection to the original buffer
 9367        // location.
 9368        editor.change_selections(None, cx, |s| s.refresh());
 9369        assert_eq!(
 9370            editor.selections.ranges(cx),
 9371            [
 9372                Point::new(0, 1)..Point::new(0, 1),
 9373                Point::new(0, 3)..Point::new(0, 3)
 9374            ]
 9375        );
 9376        assert!(editor.selections.pending_anchor().is_some());
 9377    });
 9378}
 9379
 9380#[gpui::test]
 9381fn test_refresh_selections_while_selecting_with_mouse(cx: &mut TestAppContext) {
 9382    init_test(cx, |_| {});
 9383
 9384    let buffer = cx.new_model(|cx| Buffer::local(sample_text(3, 4, 'a'), cx));
 9385    let mut excerpt1_id = None;
 9386    let multibuffer = cx.new_model(|cx| {
 9387        let mut multibuffer = MultiBuffer::new(ReadWrite);
 9388        excerpt1_id = multibuffer
 9389            .push_excerpts(
 9390                buffer.clone(),
 9391                [
 9392                    ExcerptRange {
 9393                        context: Point::new(0, 0)..Point::new(1, 4),
 9394                        primary: None,
 9395                    },
 9396                    ExcerptRange {
 9397                        context: Point::new(1, 0)..Point::new(2, 4),
 9398                        primary: None,
 9399                    },
 9400                ],
 9401                cx,
 9402            )
 9403            .into_iter()
 9404            .next();
 9405        assert_eq!(multibuffer.read(cx).text(), "aaaa\nbbbb\nbbbb\ncccc");
 9406        multibuffer
 9407    });
 9408
 9409    let editor = cx.add_window(|cx| {
 9410        let mut editor = build_editor(multibuffer.clone(), cx);
 9411        let snapshot = editor.snapshot(cx);
 9412        editor.begin_selection(Point::new(1, 3).to_display_point(&snapshot), false, 1, cx);
 9413        assert_eq!(
 9414            editor.selections.ranges(cx),
 9415            [Point::new(1, 3)..Point::new(1, 3)]
 9416        );
 9417        editor
 9418    });
 9419
 9420    multibuffer.update(cx, |multibuffer, cx| {
 9421        multibuffer.remove_excerpts([excerpt1_id.unwrap()], cx);
 9422    });
 9423    _ = editor.update(cx, |editor, cx| {
 9424        assert_eq!(
 9425            editor.selections.ranges(cx),
 9426            [Point::new(0, 0)..Point::new(0, 0)]
 9427        );
 9428
 9429        // Ensure we don't panic when selections are refreshed and that the pending selection is finalized.
 9430        editor.change_selections(None, cx, |s| s.refresh());
 9431        assert_eq!(
 9432            editor.selections.ranges(cx),
 9433            [Point::new(0, 3)..Point::new(0, 3)]
 9434        );
 9435        assert!(editor.selections.pending_anchor().is_some());
 9436    });
 9437}
 9438
 9439#[gpui::test]
 9440async fn test_extra_newline_insertion(cx: &mut gpui::TestAppContext) {
 9441    init_test(cx, |_| {});
 9442
 9443    let language = Arc::new(
 9444        Language::new(
 9445            LanguageConfig {
 9446                brackets: BracketPairConfig {
 9447                    pairs: vec![
 9448                        BracketPair {
 9449                            start: "{".to_string(),
 9450                            end: "}".to_string(),
 9451                            close: true,
 9452                            surround: true,
 9453                            newline: true,
 9454                        },
 9455                        BracketPair {
 9456                            start: "/* ".to_string(),
 9457                            end: " */".to_string(),
 9458                            close: true,
 9459                            surround: true,
 9460                            newline: true,
 9461                        },
 9462                    ],
 9463                    ..Default::default()
 9464                },
 9465                ..Default::default()
 9466            },
 9467            Some(tree_sitter_rust::LANGUAGE.into()),
 9468        )
 9469        .with_indents_query("")
 9470        .unwrap(),
 9471    );
 9472
 9473    let text = concat!(
 9474        "{   }\n",     //
 9475        "  x\n",       //
 9476        "  /*   */\n", //
 9477        "x\n",         //
 9478        "{{} }\n",     //
 9479    );
 9480
 9481    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
 9482    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
 9483    let (view, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
 9484    view.condition::<crate::EditorEvent>(cx, |view, cx| !view.buffer.read(cx).is_parsing(cx))
 9485        .await;
 9486
 9487    view.update(cx, |view, cx| {
 9488        view.change_selections(None, cx, |s| {
 9489            s.select_display_ranges([
 9490                DisplayPoint::new(DisplayRow(0), 2)..DisplayPoint::new(DisplayRow(0), 3),
 9491                DisplayPoint::new(DisplayRow(2), 5)..DisplayPoint::new(DisplayRow(2), 5),
 9492                DisplayPoint::new(DisplayRow(4), 4)..DisplayPoint::new(DisplayRow(4), 4),
 9493            ])
 9494        });
 9495        view.newline(&Newline, cx);
 9496
 9497        assert_eq!(
 9498            view.buffer().read(cx).read(cx).text(),
 9499            concat!(
 9500                "{ \n",    // Suppress rustfmt
 9501                "\n",      //
 9502                "}\n",     //
 9503                "  x\n",   //
 9504                "  /* \n", //
 9505                "  \n",    //
 9506                "  */\n",  //
 9507                "x\n",     //
 9508                "{{} \n",  //
 9509                "}\n",     //
 9510            )
 9511        );
 9512    });
 9513}
 9514
 9515#[gpui::test]
 9516fn test_highlighted_ranges(cx: &mut TestAppContext) {
 9517    init_test(cx, |_| {});
 9518
 9519    let editor = cx.add_window(|cx| {
 9520        let buffer = MultiBuffer::build_simple(&sample_text(16, 8, 'a'), cx);
 9521        build_editor(buffer.clone(), cx)
 9522    });
 9523
 9524    _ = editor.update(cx, |editor, cx| {
 9525        struct Type1;
 9526        struct Type2;
 9527
 9528        let buffer = editor.buffer.read(cx).snapshot(cx);
 9529
 9530        let anchor_range =
 9531            |range: Range<Point>| buffer.anchor_after(range.start)..buffer.anchor_after(range.end);
 9532
 9533        editor.highlight_background::<Type1>(
 9534            &[
 9535                anchor_range(Point::new(2, 1)..Point::new(2, 3)),
 9536                anchor_range(Point::new(4, 2)..Point::new(4, 4)),
 9537                anchor_range(Point::new(6, 3)..Point::new(6, 5)),
 9538                anchor_range(Point::new(8, 4)..Point::new(8, 6)),
 9539            ],
 9540            |_| Hsla::red(),
 9541            cx,
 9542        );
 9543        editor.highlight_background::<Type2>(
 9544            &[
 9545                anchor_range(Point::new(3, 2)..Point::new(3, 5)),
 9546                anchor_range(Point::new(5, 3)..Point::new(5, 6)),
 9547                anchor_range(Point::new(7, 4)..Point::new(7, 7)),
 9548                anchor_range(Point::new(9, 5)..Point::new(9, 8)),
 9549            ],
 9550            |_| Hsla::green(),
 9551            cx,
 9552        );
 9553
 9554        let snapshot = editor.snapshot(cx);
 9555        let mut highlighted_ranges = editor.background_highlights_in_range(
 9556            anchor_range(Point::new(3, 4)..Point::new(7, 4)),
 9557            &snapshot,
 9558            cx.theme().colors(),
 9559        );
 9560        // Enforce a consistent ordering based on color without relying on the ordering of the
 9561        // highlight's `TypeId` which is non-executor.
 9562        highlighted_ranges.sort_unstable_by_key(|(_, color)| *color);
 9563        assert_eq!(
 9564            highlighted_ranges,
 9565            &[
 9566                (
 9567                    DisplayPoint::new(DisplayRow(4), 2)..DisplayPoint::new(DisplayRow(4), 4),
 9568                    Hsla::red(),
 9569                ),
 9570                (
 9571                    DisplayPoint::new(DisplayRow(6), 3)..DisplayPoint::new(DisplayRow(6), 5),
 9572                    Hsla::red(),
 9573                ),
 9574                (
 9575                    DisplayPoint::new(DisplayRow(3), 2)..DisplayPoint::new(DisplayRow(3), 5),
 9576                    Hsla::green(),
 9577                ),
 9578                (
 9579                    DisplayPoint::new(DisplayRow(5), 3)..DisplayPoint::new(DisplayRow(5), 6),
 9580                    Hsla::green(),
 9581                ),
 9582            ]
 9583        );
 9584        assert_eq!(
 9585            editor.background_highlights_in_range(
 9586                anchor_range(Point::new(5, 6)..Point::new(6, 4)),
 9587                &snapshot,
 9588                cx.theme().colors(),
 9589            ),
 9590            &[(
 9591                DisplayPoint::new(DisplayRow(6), 3)..DisplayPoint::new(DisplayRow(6), 5),
 9592                Hsla::red(),
 9593            )]
 9594        );
 9595    });
 9596}
 9597
 9598#[gpui::test]
 9599async fn test_following(cx: &mut gpui::TestAppContext) {
 9600    init_test(cx, |_| {});
 9601
 9602    let fs = FakeFs::new(cx.executor());
 9603    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 9604
 9605    let buffer = project.update(cx, |project, cx| {
 9606        let buffer = project.create_local_buffer(&sample_text(16, 8, 'a'), None, cx);
 9607        cx.new_model(|cx| MultiBuffer::singleton(buffer, cx))
 9608    });
 9609    let leader = cx.add_window(|cx| build_editor(buffer.clone(), cx));
 9610    let follower = cx.update(|cx| {
 9611        cx.open_window(
 9612            WindowOptions {
 9613                window_bounds: Some(WindowBounds::Windowed(Bounds::from_corners(
 9614                    gpui::Point::new(px(0.), px(0.)),
 9615                    gpui::Point::new(px(10.), px(80.)),
 9616                ))),
 9617                ..Default::default()
 9618            },
 9619            |cx| cx.new_view(|cx| build_editor(buffer.clone(), cx)),
 9620        )
 9621        .unwrap()
 9622    });
 9623
 9624    let is_still_following = Rc::new(RefCell::new(true));
 9625    let follower_edit_event_count = Rc::new(RefCell::new(0));
 9626    let pending_update = Rc::new(RefCell::new(None));
 9627    _ = follower.update(cx, {
 9628        let update = pending_update.clone();
 9629        let is_still_following = is_still_following.clone();
 9630        let follower_edit_event_count = follower_edit_event_count.clone();
 9631        |_, cx| {
 9632            cx.subscribe(
 9633                &leader.root_view(cx).unwrap(),
 9634                move |_, leader, event, cx| {
 9635                    leader
 9636                        .read(cx)
 9637                        .add_event_to_update_proto(event, &mut update.borrow_mut(), cx);
 9638                },
 9639            )
 9640            .detach();
 9641
 9642            cx.subscribe(
 9643                &follower.root_view(cx).unwrap(),
 9644                move |_, _, event: &EditorEvent, _cx| {
 9645                    if matches!(Editor::to_follow_event(event), Some(FollowEvent::Unfollow)) {
 9646                        *is_still_following.borrow_mut() = false;
 9647                    }
 9648
 9649                    if let EditorEvent::BufferEdited = event {
 9650                        *follower_edit_event_count.borrow_mut() += 1;
 9651                    }
 9652                },
 9653            )
 9654            .detach();
 9655        }
 9656    });
 9657
 9658    // Update the selections only
 9659    _ = leader.update(cx, |leader, cx| {
 9660        leader.change_selections(None, cx, |s| s.select_ranges([1..1]));
 9661    });
 9662    follower
 9663        .update(cx, |follower, cx| {
 9664            follower.apply_update_proto(&project, pending_update.borrow_mut().take().unwrap(), cx)
 9665        })
 9666        .unwrap()
 9667        .await
 9668        .unwrap();
 9669    _ = follower.update(cx, |follower, cx| {
 9670        assert_eq!(follower.selections.ranges(cx), vec![1..1]);
 9671    });
 9672    assert!(*is_still_following.borrow());
 9673    assert_eq!(*follower_edit_event_count.borrow(), 0);
 9674
 9675    // Update the scroll position only
 9676    _ = leader.update(cx, |leader, cx| {
 9677        leader.set_scroll_position(gpui::Point::new(1.5, 3.5), cx);
 9678    });
 9679    follower
 9680        .update(cx, |follower, cx| {
 9681            follower.apply_update_proto(&project, pending_update.borrow_mut().take().unwrap(), cx)
 9682        })
 9683        .unwrap()
 9684        .await
 9685        .unwrap();
 9686    assert_eq!(
 9687        follower
 9688            .update(cx, |follower, cx| follower.scroll_position(cx))
 9689            .unwrap(),
 9690        gpui::Point::new(1.5, 3.5)
 9691    );
 9692    assert!(*is_still_following.borrow());
 9693    assert_eq!(*follower_edit_event_count.borrow(), 0);
 9694
 9695    // Update the selections and scroll position. The follower's scroll position is updated
 9696    // via autoscroll, not via the leader's exact scroll position.
 9697    _ = leader.update(cx, |leader, cx| {
 9698        leader.change_selections(None, cx, |s| s.select_ranges([0..0]));
 9699        leader.request_autoscroll(Autoscroll::newest(), cx);
 9700        leader.set_scroll_position(gpui::Point::new(1.5, 3.5), cx);
 9701    });
 9702    follower
 9703        .update(cx, |follower, cx| {
 9704            follower.apply_update_proto(&project, pending_update.borrow_mut().take().unwrap(), cx)
 9705        })
 9706        .unwrap()
 9707        .await
 9708        .unwrap();
 9709    _ = follower.update(cx, |follower, cx| {
 9710        assert_eq!(follower.scroll_position(cx), gpui::Point::new(1.5, 0.0));
 9711        assert_eq!(follower.selections.ranges(cx), vec![0..0]);
 9712    });
 9713    assert!(*is_still_following.borrow());
 9714
 9715    // Creating a pending selection that precedes another selection
 9716    _ = leader.update(cx, |leader, cx| {
 9717        leader.change_selections(None, cx, |s| s.select_ranges([1..1]));
 9718        leader.begin_selection(DisplayPoint::new(DisplayRow(0), 0), true, 1, cx);
 9719    });
 9720    follower
 9721        .update(cx, |follower, cx| {
 9722            follower.apply_update_proto(&project, pending_update.borrow_mut().take().unwrap(), cx)
 9723        })
 9724        .unwrap()
 9725        .await
 9726        .unwrap();
 9727    _ = follower.update(cx, |follower, cx| {
 9728        assert_eq!(follower.selections.ranges(cx), vec![0..0, 1..1]);
 9729    });
 9730    assert!(*is_still_following.borrow());
 9731
 9732    // Extend the pending selection so that it surrounds another selection
 9733    _ = leader.update(cx, |leader, cx| {
 9734        leader.extend_selection(DisplayPoint::new(DisplayRow(0), 2), 1, cx);
 9735    });
 9736    follower
 9737        .update(cx, |follower, cx| {
 9738            follower.apply_update_proto(&project, pending_update.borrow_mut().take().unwrap(), cx)
 9739        })
 9740        .unwrap()
 9741        .await
 9742        .unwrap();
 9743    _ = follower.update(cx, |follower, cx| {
 9744        assert_eq!(follower.selections.ranges(cx), vec![0..2]);
 9745    });
 9746
 9747    // Scrolling locally breaks the follow
 9748    _ = follower.update(cx, |follower, cx| {
 9749        let top_anchor = follower.buffer().read(cx).read(cx).anchor_after(0);
 9750        follower.set_scroll_anchor(
 9751            ScrollAnchor {
 9752                anchor: top_anchor,
 9753                offset: gpui::Point::new(0.0, 0.5),
 9754            },
 9755            cx,
 9756        );
 9757    });
 9758    assert!(!(*is_still_following.borrow()));
 9759}
 9760
 9761#[gpui::test]
 9762async fn test_following_with_multiple_excerpts(cx: &mut gpui::TestAppContext) {
 9763    init_test(cx, |_| {});
 9764
 9765    let fs = FakeFs::new(cx.executor());
 9766    let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 9767    let workspace = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
 9768    let pane = workspace
 9769        .update(cx, |workspace, _| workspace.active_pane().clone())
 9770        .unwrap();
 9771
 9772    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
 9773
 9774    let leader = pane.update(cx, |_, cx| {
 9775        let multibuffer = cx.new_model(|_| MultiBuffer::new(ReadWrite));
 9776        cx.new_view(|cx| build_editor(multibuffer.clone(), cx))
 9777    });
 9778
 9779    // Start following the editor when it has no excerpts.
 9780    let mut state_message = leader.update(cx, |leader, cx| leader.to_state_proto(cx));
 9781    let follower_1 = cx
 9782        .update_window(*workspace.deref(), |_, cx| {
 9783            Editor::from_state_proto(
 9784                workspace.root_view(cx).unwrap(),
 9785                ViewId {
 9786                    creator: Default::default(),
 9787                    id: 0,
 9788                },
 9789                &mut state_message,
 9790                cx,
 9791            )
 9792        })
 9793        .unwrap()
 9794        .unwrap()
 9795        .await
 9796        .unwrap();
 9797
 9798    let update_message = Rc::new(RefCell::new(None));
 9799    follower_1.update(cx, {
 9800        let update = update_message.clone();
 9801        |_, cx| {
 9802            cx.subscribe(&leader, move |_, leader, event, cx| {
 9803                leader
 9804                    .read(cx)
 9805                    .add_event_to_update_proto(event, &mut update.borrow_mut(), cx);
 9806            })
 9807            .detach();
 9808        }
 9809    });
 9810
 9811    let (buffer_1, buffer_2) = project.update(cx, |project, cx| {
 9812        (
 9813            project.create_local_buffer("abc\ndef\nghi\njkl\n", None, cx),
 9814            project.create_local_buffer("mno\npqr\nstu\nvwx\n", None, cx),
 9815        )
 9816    });
 9817
 9818    // Insert some excerpts.
 9819    leader.update(cx, |leader, cx| {
 9820        leader.buffer.update(cx, |multibuffer, cx| {
 9821            let excerpt_ids = multibuffer.push_excerpts(
 9822                buffer_1.clone(),
 9823                [
 9824                    ExcerptRange {
 9825                        context: 1..6,
 9826                        primary: None,
 9827                    },
 9828                    ExcerptRange {
 9829                        context: 12..15,
 9830                        primary: None,
 9831                    },
 9832                    ExcerptRange {
 9833                        context: 0..3,
 9834                        primary: None,
 9835                    },
 9836                ],
 9837                cx,
 9838            );
 9839            multibuffer.insert_excerpts_after(
 9840                excerpt_ids[0],
 9841                buffer_2.clone(),
 9842                [
 9843                    ExcerptRange {
 9844                        context: 8..12,
 9845                        primary: None,
 9846                    },
 9847                    ExcerptRange {
 9848                        context: 0..6,
 9849                        primary: None,
 9850                    },
 9851                ],
 9852                cx,
 9853            );
 9854        });
 9855    });
 9856
 9857    // Apply the update of adding the excerpts.
 9858    follower_1
 9859        .update(cx, |follower, cx| {
 9860            follower.apply_update_proto(&project, update_message.borrow().clone().unwrap(), cx)
 9861        })
 9862        .await
 9863        .unwrap();
 9864    assert_eq!(
 9865        follower_1.update(cx, |editor, cx| editor.text(cx)),
 9866        leader.update(cx, |editor, cx| editor.text(cx))
 9867    );
 9868    update_message.borrow_mut().take();
 9869
 9870    // Start following separately after it already has excerpts.
 9871    let mut state_message = leader.update(cx, |leader, cx| leader.to_state_proto(cx));
 9872    let follower_2 = cx
 9873        .update_window(*workspace.deref(), |_, cx| {
 9874            Editor::from_state_proto(
 9875                workspace.root_view(cx).unwrap().clone(),
 9876                ViewId {
 9877                    creator: Default::default(),
 9878                    id: 0,
 9879                },
 9880                &mut state_message,
 9881                cx,
 9882            )
 9883        })
 9884        .unwrap()
 9885        .unwrap()
 9886        .await
 9887        .unwrap();
 9888    assert_eq!(
 9889        follower_2.update(cx, |editor, cx| editor.text(cx)),
 9890        leader.update(cx, |editor, cx| editor.text(cx))
 9891    );
 9892
 9893    // Remove some excerpts.
 9894    leader.update(cx, |leader, cx| {
 9895        leader.buffer.update(cx, |multibuffer, cx| {
 9896            let excerpt_ids = multibuffer.excerpt_ids();
 9897            multibuffer.remove_excerpts([excerpt_ids[1], excerpt_ids[2]], cx);
 9898            multibuffer.remove_excerpts([excerpt_ids[0]], cx);
 9899        });
 9900    });
 9901
 9902    // Apply the update of removing the excerpts.
 9903    follower_1
 9904        .update(cx, |follower, cx| {
 9905            follower.apply_update_proto(&project, update_message.borrow().clone().unwrap(), cx)
 9906        })
 9907        .await
 9908        .unwrap();
 9909    follower_2
 9910        .update(cx, |follower, cx| {
 9911            follower.apply_update_proto(&project, update_message.borrow().clone().unwrap(), cx)
 9912        })
 9913        .await
 9914        .unwrap();
 9915    update_message.borrow_mut().take();
 9916    assert_eq!(
 9917        follower_1.update(cx, |editor, cx| editor.text(cx)),
 9918        leader.update(cx, |editor, cx| editor.text(cx))
 9919    );
 9920}
 9921
 9922#[gpui::test]
 9923async fn go_to_prev_overlapping_diagnostic(
 9924    executor: BackgroundExecutor,
 9925    cx: &mut gpui::TestAppContext,
 9926) {
 9927    init_test(cx, |_| {});
 9928
 9929    let mut cx = EditorTestContext::new(cx).await;
 9930    let project = cx.update_editor(|editor, _| editor.project.clone().unwrap());
 9931
 9932    cx.set_state(indoc! {"
 9933        ˇfn func(abc def: i32) -> u32 {
 9934        }
 9935    "});
 9936
 9937    cx.update(|cx| {
 9938        project.update(cx, |project, cx| {
 9939            project
 9940                .update_diagnostics(
 9941                    LanguageServerId(0),
 9942                    lsp::PublishDiagnosticsParams {
 9943                        uri: lsp::Url::from_file_path("/root/file").unwrap(),
 9944                        version: None,
 9945                        diagnostics: vec![
 9946                            lsp::Diagnostic {
 9947                                range: lsp::Range::new(
 9948                                    lsp::Position::new(0, 11),
 9949                                    lsp::Position::new(0, 12),
 9950                                ),
 9951                                severity: Some(lsp::DiagnosticSeverity::ERROR),
 9952                                ..Default::default()
 9953                            },
 9954                            lsp::Diagnostic {
 9955                                range: lsp::Range::new(
 9956                                    lsp::Position::new(0, 12),
 9957                                    lsp::Position::new(0, 15),
 9958                                ),
 9959                                severity: Some(lsp::DiagnosticSeverity::ERROR),
 9960                                ..Default::default()
 9961                            },
 9962                            lsp::Diagnostic {
 9963                                range: lsp::Range::new(
 9964                                    lsp::Position::new(0, 25),
 9965                                    lsp::Position::new(0, 28),
 9966                                ),
 9967                                severity: Some(lsp::DiagnosticSeverity::ERROR),
 9968                                ..Default::default()
 9969                            },
 9970                        ],
 9971                    },
 9972                    &[],
 9973                    cx,
 9974                )
 9975                .unwrap()
 9976        });
 9977    });
 9978
 9979    executor.run_until_parked();
 9980
 9981    cx.update_editor(|editor, cx| {
 9982        editor.go_to_prev_diagnostic(&GoToPrevDiagnostic, cx);
 9983    });
 9984
 9985    cx.assert_editor_state(indoc! {"
 9986        fn func(abc def: i32) -> ˇu32 {
 9987        }
 9988    "});
 9989
 9990    cx.update_editor(|editor, cx| {
 9991        editor.go_to_prev_diagnostic(&GoToPrevDiagnostic, cx);
 9992    });
 9993
 9994    cx.assert_editor_state(indoc! {"
 9995        fn func(abc ˇdef: i32) -> u32 {
 9996        }
 9997    "});
 9998
 9999    cx.update_editor(|editor, cx| {
10000        editor.go_to_prev_diagnostic(&GoToPrevDiagnostic, cx);
10001    });
10002
10003    cx.assert_editor_state(indoc! {"
10004        fn func(abcˇ def: i32) -> u32 {
10005        }
10006    "});
10007
10008    cx.update_editor(|editor, cx| {
10009        editor.go_to_prev_diagnostic(&GoToPrevDiagnostic, cx);
10010    });
10011
10012    cx.assert_editor_state(indoc! {"
10013        fn func(abc def: i32) -> ˇu32 {
10014        }
10015    "});
10016}
10017
10018#[gpui::test]
10019async fn test_diagnostics_with_links(cx: &mut TestAppContext) {
10020    init_test(cx, |_| {});
10021
10022    let mut cx = EditorTestContext::new(cx).await;
10023
10024    cx.set_state(indoc! {"
10025        fn func(abˇc def: i32) -> u32 {
10026        }
10027    "});
10028    let project = cx.update_editor(|editor, _| editor.project.clone().unwrap());
10029
10030    cx.update(|cx| {
10031        project.update(cx, |project, cx| {
10032            project.update_diagnostics(
10033                LanguageServerId(0),
10034                lsp::PublishDiagnosticsParams {
10035                    uri: lsp::Url::from_file_path("/root/file").unwrap(),
10036                    version: None,
10037                    diagnostics: vec![lsp::Diagnostic {
10038                        range: lsp::Range::new(lsp::Position::new(0, 8), lsp::Position::new(0, 12)),
10039                        severity: Some(lsp::DiagnosticSeverity::ERROR),
10040                        message: "we've had problems with <https://link.one>, and <https://link.two> is broken".to_string(),
10041                        ..Default::default()
10042                    }],
10043                },
10044                &[],
10045                cx,
10046            )
10047        })
10048    }).unwrap();
10049    cx.run_until_parked();
10050    cx.update_editor(|editor, cx| hover_popover::hover(editor, &Default::default(), cx));
10051    cx.run_until_parked();
10052    cx.update_editor(|editor, _| assert!(editor.hover_state.diagnostic_popover.is_some()))
10053}
10054
10055#[gpui::test]
10056async fn go_to_hunk(executor: BackgroundExecutor, cx: &mut gpui::TestAppContext) {
10057    init_test(cx, |_| {});
10058
10059    let mut cx = EditorTestContext::new(cx).await;
10060
10061    let diff_base = r#"
10062        use some::mod;
10063
10064        const A: u32 = 42;
10065
10066        fn main() {
10067            println!("hello");
10068
10069            println!("world");
10070        }
10071        "#
10072    .unindent();
10073
10074    // Edits are modified, removed, modified, added
10075    cx.set_state(
10076        &r#"
10077        use some::modified;
10078
10079        ˇ
10080        fn main() {
10081            println!("hello there");
10082
10083            println!("around the");
10084            println!("world");
10085        }
10086        "#
10087        .unindent(),
10088    );
10089
10090    cx.set_diff_base(&diff_base);
10091    executor.run_until_parked();
10092
10093    cx.update_editor(|editor, cx| {
10094        //Wrap around the bottom of the buffer
10095        for _ in 0..3 {
10096            editor.go_to_next_hunk(&GoToHunk, cx);
10097        }
10098    });
10099
10100    cx.assert_editor_state(
10101        &r#"
10102        ˇuse some::modified;
10103
10104
10105        fn main() {
10106            println!("hello there");
10107
10108            println!("around the");
10109            println!("world");
10110        }
10111        "#
10112        .unindent(),
10113    );
10114
10115    cx.update_editor(|editor, cx| {
10116        //Wrap around the top of the buffer
10117        for _ in 0..2 {
10118            editor.go_to_prev_hunk(&GoToPrevHunk, cx);
10119        }
10120    });
10121
10122    cx.assert_editor_state(
10123        &r#"
10124        use some::modified;
10125
10126
10127        fn main() {
10128        ˇ    println!("hello there");
10129
10130            println!("around the");
10131            println!("world");
10132        }
10133        "#
10134        .unindent(),
10135    );
10136
10137    cx.update_editor(|editor, cx| {
10138        editor.go_to_prev_hunk(&GoToPrevHunk, cx);
10139    });
10140
10141    cx.assert_editor_state(
10142        &r#"
10143        use some::modified;
10144
10145        ˇ
10146        fn main() {
10147            println!("hello there");
10148
10149            println!("around the");
10150            println!("world");
10151        }
10152        "#
10153        .unindent(),
10154    );
10155
10156    cx.update_editor(|editor, cx| {
10157        for _ in 0..3 {
10158            editor.go_to_prev_hunk(&GoToPrevHunk, cx);
10159        }
10160    });
10161
10162    cx.assert_editor_state(
10163        &r#"
10164        use some::modified;
10165
10166
10167        fn main() {
10168        ˇ    println!("hello there");
10169
10170            println!("around the");
10171            println!("world");
10172        }
10173        "#
10174        .unindent(),
10175    );
10176
10177    cx.update_editor(|editor, cx| {
10178        editor.fold(&Fold, cx);
10179
10180        //Make sure that the fold only gets one hunk
10181        for _ in 0..4 {
10182            editor.go_to_next_hunk(&GoToHunk, cx);
10183        }
10184    });
10185
10186    cx.assert_editor_state(
10187        &r#"
10188        ˇuse some::modified;
10189
10190
10191        fn main() {
10192            println!("hello there");
10193
10194            println!("around the");
10195            println!("world");
10196        }
10197        "#
10198        .unindent(),
10199    );
10200}
10201
10202#[test]
10203fn test_split_words() {
10204    fn split(text: &str) -> Vec<&str> {
10205        split_words(text).collect()
10206    }
10207
10208    assert_eq!(split("HelloWorld"), &["Hello", "World"]);
10209    assert_eq!(split("hello_world"), &["hello_", "world"]);
10210    assert_eq!(split("_hello_world_"), &["_", "hello_", "world_"]);
10211    assert_eq!(split("Hello_World"), &["Hello_", "World"]);
10212    assert_eq!(split("helloWOrld"), &["hello", "WOrld"]);
10213    assert_eq!(split("helloworld"), &["helloworld"]);
10214
10215    assert_eq!(split(":do_the_thing"), &[":", "do_", "the_", "thing"]);
10216}
10217
10218#[gpui::test]
10219async fn test_move_to_enclosing_bracket(cx: &mut gpui::TestAppContext) {
10220    init_test(cx, |_| {});
10221
10222    let mut cx = EditorLspTestContext::new_typescript(Default::default(), cx).await;
10223    let mut assert = |before, after| {
10224        let _state_context = cx.set_state(before);
10225        cx.update_editor(|editor, cx| {
10226            editor.move_to_enclosing_bracket(&MoveToEnclosingBracket, cx)
10227        });
10228        cx.assert_editor_state(after);
10229    };
10230
10231    // Outside bracket jumps to outside of matching bracket
10232    assert("console.logˇ(var);", "console.log(var)ˇ;");
10233    assert("console.log(var)ˇ;", "console.logˇ(var);");
10234
10235    // Inside bracket jumps to inside of matching bracket
10236    assert("console.log(ˇvar);", "console.log(varˇ);");
10237    assert("console.log(varˇ);", "console.log(ˇvar);");
10238
10239    // When outside a bracket and inside, favor jumping to the inside bracket
10240    assert(
10241        "console.log('foo', [1, 2, 3]ˇ);",
10242        "console.log(ˇ'foo', [1, 2, 3]);",
10243    );
10244    assert(
10245        "console.log(ˇ'foo', [1, 2, 3]);",
10246        "console.log('foo', [1, 2, 3]ˇ);",
10247    );
10248
10249    // Bias forward if two options are equally likely
10250    assert(
10251        "let result = curried_fun()ˇ();",
10252        "let result = curried_fun()()ˇ;",
10253    );
10254
10255    // If directly adjacent to a smaller pair but inside a larger (not adjacent), pick the smaller
10256    assert(
10257        indoc! {"
10258            function test() {
10259                console.log('test')ˇ
10260            }"},
10261        indoc! {"
10262            function test() {
10263                console.logˇ('test')
10264            }"},
10265    );
10266}
10267
10268#[gpui::test]
10269async fn test_on_type_formatting_not_triggered(cx: &mut gpui::TestAppContext) {
10270    init_test(cx, |_| {});
10271
10272    let fs = FakeFs::new(cx.executor());
10273    fs.insert_tree(
10274        "/a",
10275        json!({
10276            "main.rs": "fn main() { let a = 5; }",
10277            "other.rs": "// Test file",
10278        }),
10279    )
10280    .await;
10281    let project = Project::test(fs, ["/a".as_ref()], cx).await;
10282
10283    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
10284    language_registry.add(Arc::new(Language::new(
10285        LanguageConfig {
10286            name: "Rust".into(),
10287            matcher: LanguageMatcher {
10288                path_suffixes: vec!["rs".to_string()],
10289                ..Default::default()
10290            },
10291            brackets: BracketPairConfig {
10292                pairs: vec![BracketPair {
10293                    start: "{".to_string(),
10294                    end: "}".to_string(),
10295                    close: true,
10296                    surround: true,
10297                    newline: true,
10298                }],
10299                disabled_scopes_by_bracket_ix: Vec::new(),
10300            },
10301            ..Default::default()
10302        },
10303        Some(tree_sitter_rust::LANGUAGE.into()),
10304    )));
10305    let mut fake_servers = language_registry.register_fake_lsp(
10306        "Rust",
10307        FakeLspAdapter {
10308            capabilities: lsp::ServerCapabilities {
10309                document_on_type_formatting_provider: Some(lsp::DocumentOnTypeFormattingOptions {
10310                    first_trigger_character: "{".to_string(),
10311                    more_trigger_character: None,
10312                }),
10313                ..Default::default()
10314            },
10315            ..Default::default()
10316        },
10317    );
10318
10319    let workspace = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
10320
10321    let cx = &mut VisualTestContext::from_window(*workspace, cx);
10322
10323    let worktree_id = workspace
10324        .update(cx, |workspace, cx| {
10325            workspace.project().update(cx, |project, cx| {
10326                project.worktrees(cx).next().unwrap().read(cx).id()
10327            })
10328        })
10329        .unwrap();
10330
10331    let buffer = project
10332        .update(cx, |project, cx| {
10333            project.open_local_buffer("/a/main.rs", cx)
10334        })
10335        .await
10336        .unwrap();
10337    cx.executor().run_until_parked();
10338    cx.executor().start_waiting();
10339    let fake_server = fake_servers.next().await.unwrap();
10340    let editor_handle = workspace
10341        .update(cx, |workspace, cx| {
10342            workspace.open_path((worktree_id, "main.rs"), None, true, cx)
10343        })
10344        .unwrap()
10345        .await
10346        .unwrap()
10347        .downcast::<Editor>()
10348        .unwrap();
10349
10350    fake_server.handle_request::<lsp::request::OnTypeFormatting, _, _>(|params, _| async move {
10351        assert_eq!(
10352            params.text_document_position.text_document.uri,
10353            lsp::Url::from_file_path("/a/main.rs").unwrap(),
10354        );
10355        assert_eq!(
10356            params.text_document_position.position,
10357            lsp::Position::new(0, 21),
10358        );
10359
10360        Ok(Some(vec![lsp::TextEdit {
10361            new_text: "]".to_string(),
10362            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
10363        }]))
10364    });
10365
10366    editor_handle.update(cx, |editor, cx| {
10367        editor.focus(cx);
10368        editor.change_selections(None, cx, |s| {
10369            s.select_ranges([Point::new(0, 21)..Point::new(0, 20)])
10370        });
10371        editor.handle_input("{", cx);
10372    });
10373
10374    cx.executor().run_until_parked();
10375
10376    buffer.update(cx, |buffer, _| {
10377        assert_eq!(
10378            buffer.text(),
10379            "fn main() { let a = {5}; }",
10380            "No extra braces from on type formatting should appear in the buffer"
10381        )
10382    });
10383}
10384
10385#[gpui::test]
10386async fn test_language_server_restart_due_to_settings_change(cx: &mut gpui::TestAppContext) {
10387    init_test(cx, |_| {});
10388
10389    let fs = FakeFs::new(cx.executor());
10390    fs.insert_tree(
10391        "/a",
10392        json!({
10393            "main.rs": "fn main() { let a = 5; }",
10394            "other.rs": "// Test file",
10395        }),
10396    )
10397    .await;
10398
10399    let project = Project::test(fs, ["/a".as_ref()], cx).await;
10400
10401    let server_restarts = Arc::new(AtomicUsize::new(0));
10402    let closure_restarts = Arc::clone(&server_restarts);
10403    let language_server_name = "test language server";
10404    let language_name: LanguageName = "Rust".into();
10405
10406    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
10407    language_registry.add(Arc::new(Language::new(
10408        LanguageConfig {
10409            name: language_name.clone(),
10410            matcher: LanguageMatcher {
10411                path_suffixes: vec!["rs".to_string()],
10412                ..Default::default()
10413            },
10414            ..Default::default()
10415        },
10416        Some(tree_sitter_rust::LANGUAGE.into()),
10417    )));
10418    let mut fake_servers = language_registry.register_fake_lsp(
10419        "Rust",
10420        FakeLspAdapter {
10421            name: language_server_name,
10422            initialization_options: Some(json!({
10423                "testOptionValue": true
10424            })),
10425            initializer: Some(Box::new(move |fake_server| {
10426                let task_restarts = Arc::clone(&closure_restarts);
10427                fake_server.handle_request::<lsp::request::Shutdown, _, _>(move |_, _| {
10428                    task_restarts.fetch_add(1, atomic::Ordering::Release);
10429                    futures::future::ready(Ok(()))
10430                });
10431            })),
10432            ..Default::default()
10433        },
10434    );
10435
10436    let _window = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
10437    let _buffer = project
10438        .update(cx, |project, cx| {
10439            project.open_local_buffer("/a/main.rs", cx)
10440        })
10441        .await
10442        .unwrap();
10443    let _fake_server = fake_servers.next().await.unwrap();
10444    update_test_language_settings(cx, |language_settings| {
10445        language_settings.languages.insert(
10446            language_name.clone(),
10447            LanguageSettingsContent {
10448                tab_size: NonZeroU32::new(8),
10449                ..Default::default()
10450            },
10451        );
10452    });
10453    cx.executor().run_until_parked();
10454    assert_eq!(
10455        server_restarts.load(atomic::Ordering::Acquire),
10456        0,
10457        "Should not restart LSP server on an unrelated change"
10458    );
10459
10460    update_test_project_settings(cx, |project_settings| {
10461        project_settings.lsp.insert(
10462            "Some other server name".into(),
10463            LspSettings {
10464                binary: None,
10465                settings: None,
10466                initialization_options: Some(json!({
10467                    "some other init value": false
10468                })),
10469            },
10470        );
10471    });
10472    cx.executor().run_until_parked();
10473    assert_eq!(
10474        server_restarts.load(atomic::Ordering::Acquire),
10475        0,
10476        "Should not restart LSP server on an unrelated LSP settings change"
10477    );
10478
10479    update_test_project_settings(cx, |project_settings| {
10480        project_settings.lsp.insert(
10481            language_server_name.into(),
10482            LspSettings {
10483                binary: None,
10484                settings: None,
10485                initialization_options: Some(json!({
10486                    "anotherInitValue": false
10487                })),
10488            },
10489        );
10490    });
10491    cx.executor().run_until_parked();
10492    assert_eq!(
10493        server_restarts.load(atomic::Ordering::Acquire),
10494        1,
10495        "Should restart LSP server on a related LSP settings change"
10496    );
10497
10498    update_test_project_settings(cx, |project_settings| {
10499        project_settings.lsp.insert(
10500            language_server_name.into(),
10501            LspSettings {
10502                binary: None,
10503                settings: None,
10504                initialization_options: Some(json!({
10505                    "anotherInitValue": false
10506                })),
10507            },
10508        );
10509    });
10510    cx.executor().run_until_parked();
10511    assert_eq!(
10512        server_restarts.load(atomic::Ordering::Acquire),
10513        1,
10514        "Should not restart LSP server on a related LSP settings change that is the same"
10515    );
10516
10517    update_test_project_settings(cx, |project_settings| {
10518        project_settings.lsp.insert(
10519            language_server_name.into(),
10520            LspSettings {
10521                binary: None,
10522                settings: None,
10523                initialization_options: None,
10524            },
10525        );
10526    });
10527    cx.executor().run_until_parked();
10528    assert_eq!(
10529        server_restarts.load(atomic::Ordering::Acquire),
10530        2,
10531        "Should restart LSP server on another related LSP settings change"
10532    );
10533}
10534
10535#[gpui::test]
10536async fn test_completions_with_additional_edits(cx: &mut gpui::TestAppContext) {
10537    init_test(cx, |_| {});
10538
10539    let mut cx = EditorLspTestContext::new_rust(
10540        lsp::ServerCapabilities {
10541            completion_provider: Some(lsp::CompletionOptions {
10542                trigger_characters: Some(vec![".".to_string()]),
10543                resolve_provider: Some(true),
10544                ..Default::default()
10545            }),
10546            ..Default::default()
10547        },
10548        cx,
10549    )
10550    .await;
10551
10552    cx.set_state(indoc! {"fn main() { let a = 2ˇ; }"});
10553    cx.simulate_keystroke(".");
10554    let completion_item = lsp::CompletionItem {
10555        label: "some".into(),
10556        kind: Some(lsp::CompletionItemKind::SNIPPET),
10557        detail: Some("Wrap the expression in an `Option::Some`".to_string()),
10558        documentation: Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
10559            kind: lsp::MarkupKind::Markdown,
10560            value: "```rust\nSome(2)\n```".to_string(),
10561        })),
10562        deprecated: Some(false),
10563        sort_text: Some("fffffff2".to_string()),
10564        filter_text: Some("some".to_string()),
10565        insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
10566        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10567            range: lsp::Range {
10568                start: lsp::Position {
10569                    line: 0,
10570                    character: 22,
10571                },
10572                end: lsp::Position {
10573                    line: 0,
10574                    character: 22,
10575                },
10576            },
10577            new_text: "Some(2)".to_string(),
10578        })),
10579        additional_text_edits: Some(vec![lsp::TextEdit {
10580            range: lsp::Range {
10581                start: lsp::Position {
10582                    line: 0,
10583                    character: 20,
10584                },
10585                end: lsp::Position {
10586                    line: 0,
10587                    character: 22,
10588                },
10589            },
10590            new_text: "".to_string(),
10591        }]),
10592        ..Default::default()
10593    };
10594
10595    let closure_completion_item = completion_item.clone();
10596    let mut request = cx.handle_request::<lsp::request::Completion, _, _>(move |_, _, _| {
10597        let task_completion_item = closure_completion_item.clone();
10598        async move {
10599            Ok(Some(lsp::CompletionResponse::Array(vec![
10600                task_completion_item,
10601            ])))
10602        }
10603    });
10604
10605    request.next().await;
10606
10607    cx.condition(|editor, _| editor.context_menu_visible())
10608        .await;
10609    let apply_additional_edits = cx.update_editor(|editor, cx| {
10610        editor
10611            .confirm_completion(&ConfirmCompletion::default(), cx)
10612            .unwrap()
10613    });
10614    cx.assert_editor_state(indoc! {"fn main() { let a = 2.Some(2)ˇ; }"});
10615
10616    cx.handle_request::<lsp::request::ResolveCompletionItem, _, _>(move |_, _, _| {
10617        let task_completion_item = completion_item.clone();
10618        async move { Ok(task_completion_item) }
10619    })
10620    .next()
10621    .await
10622    .unwrap();
10623    apply_additional_edits.await.unwrap();
10624    cx.assert_editor_state(indoc! {"fn main() { let a = Some(2)ˇ; }"});
10625}
10626
10627#[gpui::test]
10628async fn test_completions_resolve_updates_labels(cx: &mut gpui::TestAppContext) {
10629    init_test(cx, |_| {});
10630
10631    let mut cx = EditorLspTestContext::new_rust(
10632        lsp::ServerCapabilities {
10633            completion_provider: Some(lsp::CompletionOptions {
10634                trigger_characters: Some(vec![".".to_string()]),
10635                resolve_provider: Some(true),
10636                ..Default::default()
10637            }),
10638            ..Default::default()
10639        },
10640        cx,
10641    )
10642    .await;
10643
10644    cx.set_state(indoc! {"fn main() { let a = 2ˇ; }"});
10645    cx.simulate_keystroke(".");
10646
10647    let completion_item = lsp::CompletionItem {
10648        label: "unresolved".to_string(),
10649        detail: None,
10650        documentation: None,
10651        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10652            range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
10653            new_text: ".unresolved".to_string(),
10654        })),
10655        ..lsp::CompletionItem::default()
10656    };
10657
10658    cx.handle_request::<lsp::request::Completion, _, _>(move |_, _, _| {
10659        let item = completion_item.clone();
10660        async move { Ok(Some(lsp::CompletionResponse::Array(vec![item]))) }
10661    })
10662    .next()
10663    .await;
10664
10665    cx.condition(|editor, _| editor.context_menu_visible())
10666        .await;
10667    cx.update_editor(|editor, _| {
10668        let context_menu = editor.context_menu.read();
10669        let context_menu = context_menu
10670            .as_ref()
10671            .expect("Should have the context menu deployed");
10672        match context_menu {
10673            ContextMenu::Completions(completions_menu) => {
10674                let completions = completions_menu.completions.read();
10675                assert_eq!(completions.len(), 1, "Should have one completion");
10676                assert_eq!(completions.get(0).unwrap().label.text, "unresolved");
10677            }
10678            ContextMenu::CodeActions(_) => panic!("Should show the completions menu"),
10679        }
10680    });
10681
10682    cx.handle_request::<lsp::request::ResolveCompletionItem, _, _>(move |_, _, _| async move {
10683        Ok(lsp::CompletionItem {
10684            label: "resolved".to_string(),
10685            detail: Some("Now resolved!".to_string()),
10686            documentation: Some(lsp::Documentation::String("Docs".to_string())),
10687            text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10688                range: lsp::Range::new(lsp::Position::new(0, 22), lsp::Position::new(0, 22)),
10689                new_text: ".resolved".to_string(),
10690            })),
10691            ..lsp::CompletionItem::default()
10692        })
10693    })
10694    .next()
10695    .await;
10696    cx.run_until_parked();
10697
10698    cx.update_editor(|editor, _| {
10699        let context_menu = editor.context_menu.read();
10700        let context_menu = context_menu
10701            .as_ref()
10702            .expect("Should have the context menu deployed");
10703        match context_menu {
10704            ContextMenu::Completions(completions_menu) => {
10705                let completions = completions_menu.completions.read();
10706                assert_eq!(completions.len(), 1, "Should have one completion");
10707                assert_eq!(
10708                    completions.get(0).unwrap().label.text,
10709                    "resolved",
10710                    "Should update the completion label after resolving"
10711                );
10712            }
10713            ContextMenu::CodeActions(_) => panic!("Should show the completions menu"),
10714        }
10715    });
10716}
10717
10718#[gpui::test]
10719async fn test_completions_default_resolve_data_handling(cx: &mut gpui::TestAppContext) {
10720    init_test(cx, |_| {});
10721
10722    let mut cx = EditorLspTestContext::new_rust(
10723        lsp::ServerCapabilities {
10724            completion_provider: Some(lsp::CompletionOptions {
10725                trigger_characters: Some(vec![".".to_string()]),
10726                resolve_provider: Some(true),
10727                ..Default::default()
10728            }),
10729            ..Default::default()
10730        },
10731        cx,
10732    )
10733    .await;
10734
10735    cx.set_state(indoc! {"fn main() { let a = 2ˇ; }"});
10736    cx.simulate_keystroke(".");
10737
10738    let default_commit_characters = vec!["?".to_string()];
10739    let default_data = json!({ "very": "special"});
10740    let default_insert_text_format = lsp::InsertTextFormat::SNIPPET;
10741    let default_insert_text_mode = lsp::InsertTextMode::AS_IS;
10742    let default_edit_range = lsp::Range {
10743        start: lsp::Position {
10744            line: 0,
10745            character: 5,
10746        },
10747        end: lsp::Position {
10748            line: 0,
10749            character: 5,
10750        },
10751    };
10752
10753    let resolve_requests_number = Arc::new(AtomicUsize::new(0));
10754    let expect_first_item = Arc::new(AtomicBool::new(true));
10755    cx.lsp
10756        .server
10757        .on_request::<lsp::request::ResolveCompletionItem, _, _>({
10758            let closure_default_data = default_data.clone();
10759            let closure_resolve_requests_number = resolve_requests_number.clone();
10760            let closure_expect_first_item = expect_first_item.clone();
10761            let closure_default_commit_characters = default_commit_characters.clone();
10762            move |item_to_resolve, _| {
10763                closure_resolve_requests_number.fetch_add(1, atomic::Ordering::Release);
10764                let default_data = closure_default_data.clone();
10765                let default_commit_characters = closure_default_commit_characters.clone();
10766                let expect_first_item = closure_expect_first_item.clone();
10767                async move {
10768                    if expect_first_item.load(atomic::Ordering::Acquire) {
10769                        assert_eq!(
10770                            item_to_resolve.label, "Some(2)",
10771                            "Should have selected the first item"
10772                        );
10773                        assert_eq!(
10774                            item_to_resolve.data,
10775                            Some(json!({ "very": "special"})),
10776                            "First item should bring its own data for resolving"
10777                        );
10778                        assert_eq!(
10779                            item_to_resolve.commit_characters,
10780                            Some(default_commit_characters),
10781                            "First item had no own commit characters and should inherit the default ones"
10782                        );
10783                        assert!(
10784                            matches!(
10785                                item_to_resolve.text_edit,
10786                                Some(lsp::CompletionTextEdit::InsertAndReplace { .. })
10787                            ),
10788                            "First item should bring its own edit range for resolving"
10789                        );
10790                        assert_eq!(
10791                            item_to_resolve.insert_text_format,
10792                            Some(default_insert_text_format),
10793                            "First item had no own insert text format and should inherit the default one"
10794                        );
10795                        assert_eq!(
10796                            item_to_resolve.insert_text_mode,
10797                            Some(lsp::InsertTextMode::ADJUST_INDENTATION),
10798                            "First item should bring its own insert text mode for resolving"
10799                        );
10800                        Ok(item_to_resolve)
10801                    } else {
10802                        assert_eq!(
10803                            item_to_resolve.label, "vec![2]",
10804                            "Should have selected the last item"
10805                        );
10806                        assert_eq!(
10807                            item_to_resolve.data,
10808                            Some(default_data),
10809                            "Last item has no own resolve data and should inherit the default one"
10810                        );
10811                        assert_eq!(
10812                            item_to_resolve.commit_characters,
10813                            Some(default_commit_characters),
10814                            "Last item had no own commit characters and should inherit the default ones"
10815                        );
10816                        assert_eq!(
10817                            item_to_resolve.text_edit,
10818                            Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
10819                                range: default_edit_range,
10820                                new_text: "vec![2]".to_string()
10821                            })),
10822                            "Last item had no own edit range and should inherit the default one"
10823                        );
10824                        assert_eq!(
10825                            item_to_resolve.insert_text_format,
10826                            Some(lsp::InsertTextFormat::PLAIN_TEXT),
10827                            "Last item should bring its own insert text format for resolving"
10828                        );
10829                        assert_eq!(
10830                            item_to_resolve.insert_text_mode,
10831                            Some(default_insert_text_mode),
10832                            "Last item had no own insert text mode and should inherit the default one"
10833                        );
10834
10835                        Ok(item_to_resolve)
10836                    }
10837                }
10838            }
10839        }).detach();
10840
10841    let completion_data = default_data.clone();
10842    let completion_characters = default_commit_characters.clone();
10843    cx.handle_request::<lsp::request::Completion, _, _>(move |_, _, _| {
10844        let default_data = completion_data.clone();
10845        let default_commit_characters = completion_characters.clone();
10846        async move {
10847            Ok(Some(lsp::CompletionResponse::List(lsp::CompletionList {
10848                items: vec![
10849                    lsp::CompletionItem {
10850                        label: "Some(2)".into(),
10851                        insert_text: Some("Some(2)".into()),
10852                        data: Some(json!({ "very": "special"})),
10853                        insert_text_mode: Some(lsp::InsertTextMode::ADJUST_INDENTATION),
10854                        text_edit: Some(lsp::CompletionTextEdit::InsertAndReplace(
10855                            lsp::InsertReplaceEdit {
10856                                new_text: "Some(2)".to_string(),
10857                                insert: lsp::Range::default(),
10858                                replace: lsp::Range::default(),
10859                            },
10860                        )),
10861                        ..lsp::CompletionItem::default()
10862                    },
10863                    lsp::CompletionItem {
10864                        label: "vec![2]".into(),
10865                        insert_text: Some("vec![2]".into()),
10866                        insert_text_format: Some(lsp::InsertTextFormat::PLAIN_TEXT),
10867                        ..lsp::CompletionItem::default()
10868                    },
10869                ],
10870                item_defaults: Some(lsp::CompletionListItemDefaults {
10871                    data: Some(default_data.clone()),
10872                    commit_characters: Some(default_commit_characters.clone()),
10873                    edit_range: Some(lsp::CompletionListItemDefaultsEditRange::Range(
10874                        default_edit_range,
10875                    )),
10876                    insert_text_format: Some(default_insert_text_format),
10877                    insert_text_mode: Some(default_insert_text_mode),
10878                }),
10879                ..lsp::CompletionList::default()
10880            })))
10881        }
10882    })
10883    .next()
10884    .await;
10885
10886    cx.condition(|editor, _| editor.context_menu_visible())
10887        .await;
10888    cx.run_until_parked();
10889    cx.update_editor(|editor, _| {
10890        let menu = editor.context_menu.read();
10891        match menu.as_ref().expect("should have the completions menu") {
10892            ContextMenu::Completions(completions_menu) => {
10893                assert_eq!(
10894                    completions_menu
10895                        .matches
10896                        .iter()
10897                        .map(|c| c.string.as_str())
10898                        .collect::<Vec<_>>(),
10899                    vec!["Some(2)", "vec![2]"]
10900                );
10901            }
10902            ContextMenu::CodeActions(_) => panic!("Expected to have the completions menu"),
10903        }
10904    });
10905    assert_eq!(
10906        resolve_requests_number.load(atomic::Ordering::Acquire),
10907        1,
10908        "While there are 2 items in the completion list, only 1 resolve request should have been sent, for the selected item"
10909    );
10910
10911    cx.update_editor(|editor, cx| {
10912        editor.context_menu_first(&ContextMenuFirst, cx);
10913    });
10914    cx.run_until_parked();
10915    assert_eq!(
10916        resolve_requests_number.load(atomic::Ordering::Acquire),
10917        2,
10918        "After re-selecting the first item, another resolve request should have been sent"
10919    );
10920
10921    expect_first_item.store(false, atomic::Ordering::Release);
10922    cx.update_editor(|editor, cx| {
10923        editor.context_menu_last(&ContextMenuLast, cx);
10924    });
10925    cx.run_until_parked();
10926    assert_eq!(
10927        resolve_requests_number.load(atomic::Ordering::Acquire),
10928        3,
10929        "After selecting the other item, another resolve request should have been sent"
10930    );
10931}
10932
10933#[gpui::test]
10934async fn test_completions_in_languages_with_extra_word_characters(cx: &mut gpui::TestAppContext) {
10935    init_test(cx, |_| {});
10936
10937    let mut cx = EditorLspTestContext::new(
10938        Language::new(
10939            LanguageConfig {
10940                matcher: LanguageMatcher {
10941                    path_suffixes: vec!["jsx".into()],
10942                    ..Default::default()
10943                },
10944                overrides: [(
10945                    "element".into(),
10946                    LanguageConfigOverride {
10947                        word_characters: Override::Set(['-'].into_iter().collect()),
10948                        ..Default::default()
10949                    },
10950                )]
10951                .into_iter()
10952                .collect(),
10953                ..Default::default()
10954            },
10955            Some(tree_sitter_typescript::LANGUAGE_TSX.into()),
10956        )
10957        .with_override_query("(jsx_self_closing_element) @element")
10958        .unwrap(),
10959        lsp::ServerCapabilities {
10960            completion_provider: Some(lsp::CompletionOptions {
10961                trigger_characters: Some(vec![":".to_string()]),
10962                ..Default::default()
10963            }),
10964            ..Default::default()
10965        },
10966        cx,
10967    )
10968    .await;
10969
10970    cx.lsp
10971        .handle_request::<lsp::request::Completion, _, _>(move |_, _| async move {
10972            Ok(Some(lsp::CompletionResponse::Array(vec![
10973                lsp::CompletionItem {
10974                    label: "bg-blue".into(),
10975                    ..Default::default()
10976                },
10977                lsp::CompletionItem {
10978                    label: "bg-red".into(),
10979                    ..Default::default()
10980                },
10981                lsp::CompletionItem {
10982                    label: "bg-yellow".into(),
10983                    ..Default::default()
10984                },
10985            ])))
10986        });
10987
10988    cx.set_state(r#"<p class="bgˇ" />"#);
10989
10990    // Trigger completion when typing a dash, because the dash is an extra
10991    // word character in the 'element' scope, which contains the cursor.
10992    cx.simulate_keystroke("-");
10993    cx.executor().run_until_parked();
10994    cx.update_editor(|editor, _| {
10995        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
10996            assert_eq!(
10997                menu.matches.iter().map(|m| &m.string).collect::<Vec<_>>(),
10998                &["bg-red", "bg-blue", "bg-yellow"]
10999            );
11000        } else {
11001            panic!("expected completion menu to be open");
11002        }
11003    });
11004
11005    cx.simulate_keystroke("l");
11006    cx.executor().run_until_parked();
11007    cx.update_editor(|editor, _| {
11008        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
11009            assert_eq!(
11010                menu.matches.iter().map(|m| &m.string).collect::<Vec<_>>(),
11011                &["bg-blue", "bg-yellow"]
11012            );
11013        } else {
11014            panic!("expected completion menu to be open");
11015        }
11016    });
11017
11018    // When filtering completions, consider the character after the '-' to
11019    // be the start of a subword.
11020    cx.set_state(r#"<p class="yelˇ" />"#);
11021    cx.simulate_keystroke("l");
11022    cx.executor().run_until_parked();
11023    cx.update_editor(|editor, _| {
11024        if let Some(ContextMenu::Completions(menu)) = editor.context_menu.read().as_ref() {
11025            assert_eq!(
11026                menu.matches.iter().map(|m| &m.string).collect::<Vec<_>>(),
11027                &["bg-yellow"]
11028            );
11029        } else {
11030            panic!("expected completion menu to be open");
11031        }
11032    });
11033}
11034
11035#[gpui::test]
11036async fn test_document_format_with_prettier(cx: &mut gpui::TestAppContext) {
11037    init_test(cx, |settings| {
11038        settings.defaults.formatter = Some(language_settings::SelectedFormatter::List(
11039            FormatterList(vec![Formatter::Prettier].into()),
11040        ))
11041    });
11042
11043    let fs = FakeFs::new(cx.executor());
11044    fs.insert_file("/file.ts", Default::default()).await;
11045
11046    let project = Project::test(fs, ["/file.ts".as_ref()], cx).await;
11047    let language_registry = project.read_with(cx, |project, _| project.languages().clone());
11048
11049    language_registry.add(Arc::new(Language::new(
11050        LanguageConfig {
11051            name: "TypeScript".into(),
11052            matcher: LanguageMatcher {
11053                path_suffixes: vec!["ts".to_string()],
11054                ..Default::default()
11055            },
11056            ..Default::default()
11057        },
11058        Some(tree_sitter_rust::LANGUAGE.into()),
11059    )));
11060    update_test_language_settings(cx, |settings| {
11061        settings.defaults.prettier = Some(PrettierSettings {
11062            allowed: true,
11063            ..PrettierSettings::default()
11064        });
11065    });
11066
11067    let test_plugin = "test_plugin";
11068    let _ = language_registry.register_fake_lsp(
11069        "TypeScript",
11070        FakeLspAdapter {
11071            prettier_plugins: vec![test_plugin],
11072            ..Default::default()
11073        },
11074    );
11075
11076    let prettier_format_suffix = project::TEST_PRETTIER_FORMAT_SUFFIX;
11077    let buffer = project
11078        .update(cx, |project, cx| project.open_local_buffer("/file.ts", cx))
11079        .await
11080        .unwrap();
11081
11082    let buffer_text = "one\ntwo\nthree\n";
11083    let buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer, cx));
11084    let (editor, cx) = cx.add_window_view(|cx| build_editor(buffer, cx));
11085    editor.update(cx, |editor, cx| editor.set_text(buffer_text, cx));
11086
11087    editor
11088        .update(cx, |editor, cx| {
11089            editor.perform_format(
11090                project.clone(),
11091                FormatTrigger::Manual,
11092                FormatTarget::Buffer,
11093                cx,
11094            )
11095        })
11096        .unwrap()
11097        .await;
11098    assert_eq!(
11099        editor.update(cx, |editor, cx| editor.text(cx)),
11100        buffer_text.to_string() + prettier_format_suffix,
11101        "Test prettier formatting was not applied to the original buffer text",
11102    );
11103
11104    update_test_language_settings(cx, |settings| {
11105        settings.defaults.formatter = Some(language_settings::SelectedFormatter::Auto)
11106    });
11107    let format = editor.update(cx, |editor, cx| {
11108        editor.perform_format(
11109            project.clone(),
11110            FormatTrigger::Manual,
11111            FormatTarget::Buffer,
11112            cx,
11113        )
11114    });
11115    format.await.unwrap();
11116    assert_eq!(
11117        editor.update(cx, |editor, cx| editor.text(cx)),
11118        buffer_text.to_string() + prettier_format_suffix + "\n" + prettier_format_suffix,
11119        "Autoformatting (via test prettier) was not applied to the original buffer text",
11120    );
11121}
11122
11123#[gpui::test]
11124async fn test_addition_reverts(cx: &mut gpui::TestAppContext) {
11125    init_test(cx, |_| {});
11126    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
11127    let base_text = indoc! {r#"
11128        struct Row;
11129        struct Row1;
11130        struct Row2;
11131
11132        struct Row4;
11133        struct Row5;
11134        struct Row6;
11135
11136        struct Row8;
11137        struct Row9;
11138        struct Row10;"#};
11139
11140    // When addition hunks are not adjacent to carets, no hunk revert is performed
11141    assert_hunk_revert(
11142        indoc! {r#"struct Row;
11143                   struct Row1;
11144                   struct Row1.1;
11145                   struct Row1.2;
11146                   struct Row2;ˇ
11147
11148                   struct Row4;
11149                   struct Row5;
11150                   struct Row6;
11151
11152                   struct Row8;
11153                   ˇstruct Row9;
11154                   struct Row9.1;
11155                   struct Row9.2;
11156                   struct Row9.3;
11157                   struct Row10;"#},
11158        vec![DiffHunkStatus::Added, DiffHunkStatus::Added],
11159        indoc! {r#"struct Row;
11160                   struct Row1;
11161                   struct Row1.1;
11162                   struct Row1.2;
11163                   struct Row2;ˇ
11164
11165                   struct Row4;
11166                   struct Row5;
11167                   struct Row6;
11168
11169                   struct Row8;
11170                   ˇstruct Row9;
11171                   struct Row9.1;
11172                   struct Row9.2;
11173                   struct Row9.3;
11174                   struct Row10;"#},
11175        base_text,
11176        &mut cx,
11177    );
11178    // Same for selections
11179    assert_hunk_revert(
11180        indoc! {r#"struct Row;
11181                   struct Row1;
11182                   struct Row2;
11183                   struct Row2.1;
11184                   struct Row2.2;
11185                   «ˇ
11186                   struct Row4;
11187                   struct» Row5;
11188                   «struct Row6;
11189                   ˇ»
11190                   struct Row9.1;
11191                   struct Row9.2;
11192                   struct Row9.3;
11193                   struct Row8;
11194                   struct Row9;
11195                   struct Row10;"#},
11196        vec![DiffHunkStatus::Added, DiffHunkStatus::Added],
11197        indoc! {r#"struct Row;
11198                   struct Row1;
11199                   struct Row2;
11200                   struct Row2.1;
11201                   struct Row2.2;
11202                   «ˇ
11203                   struct Row4;
11204                   struct» Row5;
11205                   «struct Row6;
11206                   ˇ»
11207                   struct Row9.1;
11208                   struct Row9.2;
11209                   struct Row9.3;
11210                   struct Row8;
11211                   struct Row9;
11212                   struct Row10;"#},
11213        base_text,
11214        &mut cx,
11215    );
11216
11217    // When carets and selections intersect the addition hunks, those are reverted.
11218    // Adjacent carets got merged.
11219    assert_hunk_revert(
11220        indoc! {r#"struct Row;
11221                   ˇ// something on the top
11222                   struct Row1;
11223                   struct Row2;
11224                   struct Roˇw3.1;
11225                   struct Row2.2;
11226                   struct Row2.3;ˇ
11227
11228                   struct Row4;
11229                   struct ˇRow5.1;
11230                   struct Row5.2;
11231                   struct «Rowˇ»5.3;
11232                   struct Row5;
11233                   struct Row6;
11234                   ˇ
11235                   struct Row9.1;
11236                   struct «Rowˇ»9.2;
11237                   struct «ˇRow»9.3;
11238                   struct Row8;
11239                   struct Row9;
11240                   «ˇ// something on bottom»
11241                   struct Row10;"#},
11242        vec![
11243            DiffHunkStatus::Added,
11244            DiffHunkStatus::Added,
11245            DiffHunkStatus::Added,
11246            DiffHunkStatus::Added,
11247            DiffHunkStatus::Added,
11248        ],
11249        indoc! {r#"struct Row;
11250                   ˇstruct Row1;
11251                   struct Row2;
11252                   ˇ
11253                   struct Row4;
11254                   ˇstruct Row5;
11255                   struct Row6;
11256                   ˇ
11257                   ˇstruct Row8;
11258                   struct Row9;
11259                   ˇstruct Row10;"#},
11260        base_text,
11261        &mut cx,
11262    );
11263}
11264
11265#[gpui::test]
11266async fn test_modification_reverts(cx: &mut gpui::TestAppContext) {
11267    init_test(cx, |_| {});
11268    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
11269    let base_text = indoc! {r#"
11270        struct Row;
11271        struct Row1;
11272        struct Row2;
11273
11274        struct Row4;
11275        struct Row5;
11276        struct Row6;
11277
11278        struct Row8;
11279        struct Row9;
11280        struct Row10;"#};
11281
11282    // Modification hunks behave the same as the addition ones.
11283    assert_hunk_revert(
11284        indoc! {r#"struct Row;
11285                   struct Row1;
11286                   struct Row33;
11287                   ˇ
11288                   struct Row4;
11289                   struct Row5;
11290                   struct Row6;
11291                   ˇ
11292                   struct Row99;
11293                   struct Row9;
11294                   struct Row10;"#},
11295        vec![DiffHunkStatus::Modified, DiffHunkStatus::Modified],
11296        indoc! {r#"struct Row;
11297                   struct Row1;
11298                   struct Row33;
11299                   ˇ
11300                   struct Row4;
11301                   struct Row5;
11302                   struct Row6;
11303                   ˇ
11304                   struct Row99;
11305                   struct Row9;
11306                   struct Row10;"#},
11307        base_text,
11308        &mut cx,
11309    );
11310    assert_hunk_revert(
11311        indoc! {r#"struct Row;
11312                   struct Row1;
11313                   struct Row33;
11314                   «ˇ
11315                   struct Row4;
11316                   struct» Row5;
11317                   «struct Row6;
11318                   ˇ»
11319                   struct Row99;
11320                   struct Row9;
11321                   struct Row10;"#},
11322        vec![DiffHunkStatus::Modified, DiffHunkStatus::Modified],
11323        indoc! {r#"struct Row;
11324                   struct Row1;
11325                   struct Row33;
11326                   «ˇ
11327                   struct Row4;
11328                   struct» Row5;
11329                   «struct Row6;
11330                   ˇ»
11331                   struct Row99;
11332                   struct Row9;
11333                   struct Row10;"#},
11334        base_text,
11335        &mut cx,
11336    );
11337
11338    assert_hunk_revert(
11339        indoc! {r#"ˇstruct Row1.1;
11340                   struct Row1;
11341                   «ˇstr»uct Row22;
11342
11343                   struct ˇRow44;
11344                   struct Row5;
11345                   struct «Rˇ»ow66;ˇ
11346
11347                   «struˇ»ct Row88;
11348                   struct Row9;
11349                   struct Row1011;ˇ"#},
11350        vec![
11351            DiffHunkStatus::Modified,
11352            DiffHunkStatus::Modified,
11353            DiffHunkStatus::Modified,
11354            DiffHunkStatus::Modified,
11355            DiffHunkStatus::Modified,
11356            DiffHunkStatus::Modified,
11357        ],
11358        indoc! {r#"struct Row;
11359                   ˇstruct Row1;
11360                   struct Row2;
11361                   ˇ
11362                   struct Row4;
11363                   ˇstruct Row5;
11364                   struct Row6;
11365                   ˇ
11366                   struct Row8;
11367                   ˇstruct Row9;
11368                   struct Row10;ˇ"#},
11369        base_text,
11370        &mut cx,
11371    );
11372}
11373
11374#[gpui::test]
11375async fn test_deletion_reverts(cx: &mut gpui::TestAppContext) {
11376    init_test(cx, |_| {});
11377    let mut cx = EditorLspTestContext::new_rust(lsp::ServerCapabilities::default(), cx).await;
11378    let base_text = indoc! {r#"struct Row;
11379struct Row1;
11380struct Row2;
11381
11382struct Row4;
11383struct Row5;
11384struct Row6;
11385
11386struct Row8;
11387struct Row9;
11388struct Row10;"#};
11389
11390    // Deletion hunks trigger with carets on adjacent rows, so carets and selections have to stay farther to avoid the revert
11391    assert_hunk_revert(
11392        indoc! {r#"struct Row;
11393                   struct Row2;
11394
11395                   ˇstruct Row4;
11396                   struct Row5;
11397                   struct Row6;
11398                   ˇ
11399                   struct Row8;
11400                   struct Row10;"#},
11401        vec![DiffHunkStatus::Removed, DiffHunkStatus::Removed],
11402        indoc! {r#"struct Row;
11403                   struct Row2;
11404
11405                   ˇstruct Row4;
11406                   struct Row5;
11407                   struct Row6;
11408                   ˇ
11409                   struct Row8;
11410                   struct Row10;"#},
11411        base_text,
11412        &mut cx,
11413    );
11414    assert_hunk_revert(
11415        indoc! {r#"struct Row;
11416                   struct Row2;
11417
11418                   «ˇstruct Row4;
11419                   struct» Row5;
11420                   «struct Row6;
11421                   ˇ»
11422                   struct Row8;
11423                   struct Row10;"#},
11424        vec![DiffHunkStatus::Removed, DiffHunkStatus::Removed],
11425        indoc! {r#"struct Row;
11426                   struct Row2;
11427
11428                   «ˇstruct Row4;
11429                   struct» Row5;
11430                   «struct Row6;
11431                   ˇ»
11432                   struct Row8;
11433                   struct Row10;"#},
11434        base_text,
11435        &mut cx,
11436    );
11437
11438    // Deletion hunks are ephemeral, so it's impossible to place the caret into them — Zed triggers reverts for lines, adjacent to carets and selections.
11439    assert_hunk_revert(
11440        indoc! {r#"struct Row;
11441                   ˇstruct Row2;
11442
11443                   struct Row4;
11444                   struct Row5;
11445                   struct Row6;
11446
11447                   struct Row8;ˇ
11448                   struct Row10;"#},
11449        vec![DiffHunkStatus::Removed, DiffHunkStatus::Removed],
11450        indoc! {r#"struct Row;
11451                   struct Row1;
11452                   ˇstruct Row2;
11453
11454                   struct Row4;
11455                   struct Row5;
11456                   struct Row6;
11457
11458                   struct Row8;ˇ
11459                   struct Row9;
11460                   struct Row10;"#},
11461        base_text,
11462        &mut cx,
11463    );
11464    assert_hunk_revert(
11465        indoc! {r#"struct Row;
11466                   struct Row2«ˇ;
11467                   struct Row4;
11468                   struct» Row5;
11469                   «struct Row6;
11470
11471                   struct Row8;ˇ»
11472                   struct Row10;"#},
11473        vec![
11474            DiffHunkStatus::Removed,
11475            DiffHunkStatus::Removed,
11476            DiffHunkStatus::Removed,
11477        ],
11478        indoc! {r#"struct Row;
11479                   struct Row1;
11480                   struct Row2«ˇ;
11481
11482                   struct Row4;
11483                   struct» Row5;
11484                   «struct Row6;
11485
11486                   struct Row8;ˇ»
11487                   struct Row9;
11488                   struct Row10;"#},
11489        base_text,
11490        &mut cx,
11491    );
11492}
11493
11494#[gpui::test]
11495async fn test_multibuffer_reverts(cx: &mut gpui::TestAppContext) {
11496    init_test(cx, |_| {});
11497
11498    let base_text_1 = "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj";
11499    let base_text_2 = "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu";
11500    let base_text_3 =
11501        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}";
11502
11503    let text_1 = edit_first_char_of_every_line(base_text_1);
11504    let text_2 = edit_first_char_of_every_line(base_text_2);
11505    let text_3 = edit_first_char_of_every_line(base_text_3);
11506
11507    let buffer_1 = cx.new_model(|cx| Buffer::local(text_1.clone(), cx));
11508    let buffer_2 = cx.new_model(|cx| Buffer::local(text_2.clone(), cx));
11509    let buffer_3 = cx.new_model(|cx| Buffer::local(text_3.clone(), cx));
11510
11511    let multibuffer = cx.new_model(|cx| {
11512        let mut multibuffer = MultiBuffer::new(ReadWrite);
11513        multibuffer.push_excerpts(
11514            buffer_1.clone(),
11515            [
11516                ExcerptRange {
11517                    context: Point::new(0, 0)..Point::new(3, 0),
11518                    primary: None,
11519                },
11520                ExcerptRange {
11521                    context: Point::new(5, 0)..Point::new(7, 0),
11522                    primary: None,
11523                },
11524                ExcerptRange {
11525                    context: Point::new(9, 0)..Point::new(10, 4),
11526                    primary: None,
11527                },
11528            ],
11529            cx,
11530        );
11531        multibuffer.push_excerpts(
11532            buffer_2.clone(),
11533            [
11534                ExcerptRange {
11535                    context: Point::new(0, 0)..Point::new(3, 0),
11536                    primary: None,
11537                },
11538                ExcerptRange {
11539                    context: Point::new(5, 0)..Point::new(7, 0),
11540                    primary: None,
11541                },
11542                ExcerptRange {
11543                    context: Point::new(9, 0)..Point::new(10, 4),
11544                    primary: None,
11545                },
11546            ],
11547            cx,
11548        );
11549        multibuffer.push_excerpts(
11550            buffer_3.clone(),
11551            [
11552                ExcerptRange {
11553                    context: Point::new(0, 0)..Point::new(3, 0),
11554                    primary: None,
11555                },
11556                ExcerptRange {
11557                    context: Point::new(5, 0)..Point::new(7, 0),
11558                    primary: None,
11559                },
11560                ExcerptRange {
11561                    context: Point::new(9, 0)..Point::new(10, 4),
11562                    primary: None,
11563                },
11564            ],
11565            cx,
11566        );
11567        multibuffer
11568    });
11569
11570    let (editor, cx) = cx.add_window_view(|cx| build_editor(multibuffer, cx));
11571    editor.update(cx, |editor, cx| {
11572        for (buffer, diff_base) in [
11573            (buffer_1.clone(), base_text_1),
11574            (buffer_2.clone(), base_text_2),
11575            (buffer_3.clone(), base_text_3),
11576        ] {
11577            let change_set = cx.new_model(|cx| {
11578                BufferChangeSet::new_with_base_text(
11579                    diff_base.to_string(),
11580                    buffer.read(cx).text_snapshot(),
11581                    cx,
11582                )
11583            });
11584            editor.diff_map.add_change_set(change_set, cx)
11585        }
11586    });
11587    cx.executor().run_until_parked();
11588
11589    editor.update(cx, |editor, cx| {
11590        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}");
11591        editor.select_all(&SelectAll, cx);
11592        editor.revert_selected_hunks(&RevertSelectedHunks, cx);
11593    });
11594    cx.executor().run_until_parked();
11595
11596    // When all ranges are selected, all buffer hunks are reverted.
11597    editor.update(cx, |editor, cx| {
11598        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");
11599    });
11600    buffer_1.update(cx, |buffer, _| {
11601        assert_eq!(buffer.text(), base_text_1);
11602    });
11603    buffer_2.update(cx, |buffer, _| {
11604        assert_eq!(buffer.text(), base_text_2);
11605    });
11606    buffer_3.update(cx, |buffer, _| {
11607        assert_eq!(buffer.text(), base_text_3);
11608    });
11609
11610    editor.update(cx, |editor, cx| {
11611        editor.undo(&Default::default(), cx);
11612    });
11613
11614    editor.update(cx, |editor, cx| {
11615        editor.change_selections(None, cx, |s| {
11616            s.select_ranges(Some(Point::new(0, 0)..Point::new(6, 0)));
11617        });
11618        editor.revert_selected_hunks(&RevertSelectedHunks, cx);
11619    });
11620
11621    // Now, when all ranges selected belong to buffer_1, the revert should succeed,
11622    // but not affect buffer_2 and its related excerpts.
11623    editor.update(cx, |editor, cx| {
11624        assert_eq!(
11625            editor.text(cx),
11626            "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}"
11627        );
11628    });
11629    buffer_1.update(cx, |buffer, _| {
11630        assert_eq!(buffer.text(), base_text_1);
11631    });
11632    buffer_2.update(cx, |buffer, _| {
11633        assert_eq!(
11634            buffer.text(),
11635            "Xlll\nXmmm\nXnnn\nXooo\nXppp\nXqqq\nXrrr\nXsss\nXttt\nXuuu"
11636        );
11637    });
11638    buffer_3.update(cx, |buffer, _| {
11639        assert_eq!(
11640            buffer.text(),
11641            "Xvvv\nXwww\nXxxx\nXyyy\nXzzz\nX{{{\nX|||\nX}}}\nX~~~\nX\u{7f}\u{7f}\u{7f}"
11642        );
11643    });
11644
11645    fn edit_first_char_of_every_line(text: &str) -> String {
11646        text.split('\n')
11647            .map(|line| format!("X{}", &line[1..]))
11648            .collect::<Vec<_>>()
11649            .join("\n")
11650    }
11651}
11652
11653#[gpui::test]
11654async fn test_mutlibuffer_in_navigation_history(cx: &mut gpui::TestAppContext) {
11655    init_test(cx, |_| {});
11656
11657    let cols = 4;
11658    let rows = 10;
11659    let sample_text_1 = sample_text(rows, cols, 'a');
11660    assert_eq!(
11661        sample_text_1,
11662        "aaaa\nbbbb\ncccc\ndddd\neeee\nffff\ngggg\nhhhh\niiii\njjjj"
11663    );
11664    let sample_text_2 = sample_text(rows, cols, 'l');
11665    assert_eq!(
11666        sample_text_2,
11667        "llll\nmmmm\nnnnn\noooo\npppp\nqqqq\nrrrr\nssss\ntttt\nuuuu"
11668    );
11669    let sample_text_3 = sample_text(rows, cols, 'v');
11670    assert_eq!(
11671        sample_text_3,
11672        "vvvv\nwwww\nxxxx\nyyyy\nzzzz\n{{{{\n||||\n}}}}\n~~~~\n\u{7f}\u{7f}\u{7f}\u{7f}"
11673    );
11674
11675    let buffer_1 = cx.new_model(|cx| Buffer::local(sample_text_1.clone(), cx));
11676    let buffer_2 = cx.new_model(|cx| Buffer::local(sample_text_2.clone(), cx));
11677    let buffer_3 = cx.new_model(|cx| Buffer::local(sample_text_3.clone(), cx));
11678
11679    let multi_buffer = cx.new_model(|cx| {
11680        let mut multibuffer = MultiBuffer::new(ReadWrite);
11681        multibuffer.push_excerpts(
11682            buffer_1.clone(),
11683            [
11684                ExcerptRange {
11685                    context: Point::new(0, 0)..Point::new(3, 0),
11686                    primary: None,
11687                },
11688                ExcerptRange {
11689                    context: Point::new(5, 0)..Point::new(7, 0),
11690                    primary: None,
11691                },
11692                ExcerptRange {
11693                    context: Point::new(9, 0)..Point::new(10, 4),
11694                    primary: None,
11695                },
11696            ],
11697            cx,
11698        );
11699        multibuffer.push_excerpts(
11700            buffer_2.clone(),
11701            [
11702                ExcerptRange {
11703                    context: Point::new(0, 0)..Point::new(3, 0),
11704                    primary: None,
11705                },
11706                ExcerptRange {
11707                    context: Point::new(5, 0)..Point::new(7, 0),
11708                    primary: None,
11709                },
11710                ExcerptRange {
11711                    context: Point::new(9, 0)..Point::new(10, 4),
11712                    primary: None,
11713                },
11714            ],
11715            cx,
11716        );
11717        multibuffer.push_excerpts(
11718            buffer_3.clone(),
11719            [
11720                ExcerptRange {
11721                    context: Point::new(0, 0)..Point::new(3, 0),
11722                    primary: None,
11723                },
11724                ExcerptRange {
11725                    context: Point::new(5, 0)..Point::new(7, 0),
11726                    primary: None,
11727                },
11728                ExcerptRange {
11729                    context: Point::new(9, 0)..Point::new(10, 4),
11730                    primary: None,
11731                },
11732            ],
11733            cx,
11734        );
11735        multibuffer
11736    });
11737
11738    let fs = FakeFs::new(cx.executor());
11739    fs.insert_tree(
11740        "/a",
11741        json!({
11742            "main.rs": sample_text_1,
11743            "other.rs": sample_text_2,
11744            "lib.rs": sample_text_3,
11745        }),
11746    )
11747    .await;
11748    let project = Project::test(fs, ["/a".as_ref()], cx).await;
11749    let workspace = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
11750    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
11751    let multi_buffer_editor = cx.new_view(|cx| {
11752        Editor::new(
11753            EditorMode::Full,
11754            multi_buffer,
11755            Some(project.clone()),
11756            true,
11757            cx,
11758        )
11759    });
11760    let multibuffer_item_id = workspace
11761        .update(cx, |workspace, cx| {
11762            assert!(
11763                workspace.active_item(cx).is_none(),
11764                "active item should be None before the first item is added"
11765            );
11766            workspace.add_item_to_active_pane(
11767                Box::new(multi_buffer_editor.clone()),
11768                None,
11769                true,
11770                cx,
11771            );
11772            let active_item = workspace
11773                .active_item(cx)
11774                .expect("should have an active item after adding the multi buffer");
11775            assert!(
11776                !active_item.is_singleton(cx),
11777                "A multi buffer was expected to active after adding"
11778            );
11779            active_item.item_id()
11780        })
11781        .unwrap();
11782    cx.executor().run_until_parked();
11783
11784    multi_buffer_editor.update(cx, |editor, cx| {
11785        editor.change_selections(Some(Autoscroll::Next), cx, |s| s.select_ranges(Some(1..2)));
11786        editor.open_excerpts(&OpenExcerpts, cx);
11787    });
11788    cx.executor().run_until_parked();
11789    let first_item_id = workspace
11790        .update(cx, |workspace, cx| {
11791            let active_item = workspace
11792                .active_item(cx)
11793                .expect("should have an active item after navigating into the 1st buffer");
11794            let first_item_id = active_item.item_id();
11795            assert_ne!(
11796                first_item_id, multibuffer_item_id,
11797                "Should navigate into the 1st buffer and activate it"
11798            );
11799            assert!(
11800                active_item.is_singleton(cx),
11801                "New active item should be a singleton buffer"
11802            );
11803            assert_eq!(
11804                active_item
11805                    .act_as::<Editor>(cx)
11806                    .expect("should have navigated into an editor for the 1st buffer")
11807                    .read(cx)
11808                    .text(cx),
11809                sample_text_1
11810            );
11811
11812            workspace
11813                .go_back(workspace.active_pane().downgrade(), cx)
11814                .detach_and_log_err(cx);
11815
11816            first_item_id
11817        })
11818        .unwrap();
11819    cx.executor().run_until_parked();
11820    workspace
11821        .update(cx, |workspace, cx| {
11822            let active_item = workspace
11823                .active_item(cx)
11824                .expect("should have an active item after navigating back");
11825            assert_eq!(
11826                active_item.item_id(),
11827                multibuffer_item_id,
11828                "Should navigate back to the multi buffer"
11829            );
11830            assert!(!active_item.is_singleton(cx));
11831        })
11832        .unwrap();
11833
11834    multi_buffer_editor.update(cx, |editor, cx| {
11835        editor.change_selections(Some(Autoscroll::Next), cx, |s| {
11836            s.select_ranges(Some(39..40))
11837        });
11838        editor.open_excerpts(&OpenExcerpts, cx);
11839    });
11840    cx.executor().run_until_parked();
11841    let second_item_id = workspace
11842        .update(cx, |workspace, cx| {
11843            let active_item = workspace
11844                .active_item(cx)
11845                .expect("should have an active item after navigating into the 2nd buffer");
11846            let second_item_id = active_item.item_id();
11847            assert_ne!(
11848                second_item_id, multibuffer_item_id,
11849                "Should navigate away from the multibuffer"
11850            );
11851            assert_ne!(
11852                second_item_id, first_item_id,
11853                "Should navigate into the 2nd buffer and activate it"
11854            );
11855            assert!(
11856                active_item.is_singleton(cx),
11857                "New active item should be a singleton buffer"
11858            );
11859            assert_eq!(
11860                active_item
11861                    .act_as::<Editor>(cx)
11862                    .expect("should have navigated into an editor")
11863                    .read(cx)
11864                    .text(cx),
11865                sample_text_2
11866            );
11867
11868            workspace
11869                .go_back(workspace.active_pane().downgrade(), cx)
11870                .detach_and_log_err(cx);
11871
11872            second_item_id
11873        })
11874        .unwrap();
11875    cx.executor().run_until_parked();
11876    workspace
11877        .update(cx, |workspace, cx| {
11878            let active_item = workspace
11879                .active_item(cx)
11880                .expect("should have an active item after navigating back from the 2nd buffer");
11881            assert_eq!(
11882                active_item.item_id(),
11883                multibuffer_item_id,
11884                "Should navigate back from the 2nd buffer to the multi buffer"
11885            );
11886            assert!(!active_item.is_singleton(cx));
11887        })
11888        .unwrap();
11889
11890    multi_buffer_editor.update(cx, |editor, cx| {
11891        editor.change_selections(Some(Autoscroll::Next), cx, |s| {
11892            s.select_ranges(Some(70..70))
11893        });
11894        editor.open_excerpts(&OpenExcerpts, cx);
11895    });
11896    cx.executor().run_until_parked();
11897    workspace
11898        .update(cx, |workspace, cx| {
11899            let active_item = workspace
11900                .active_item(cx)
11901                .expect("should have an active item after navigating into the 3rd buffer");
11902            let third_item_id = active_item.item_id();
11903            assert_ne!(
11904                third_item_id, multibuffer_item_id,
11905                "Should navigate into the 3rd buffer and activate it"
11906            );
11907            assert_ne!(third_item_id, first_item_id);
11908            assert_ne!(third_item_id, second_item_id);
11909            assert!(
11910                active_item.is_singleton(cx),
11911                "New active item should be a singleton buffer"
11912            );
11913            assert_eq!(
11914                active_item
11915                    .act_as::<Editor>(cx)
11916                    .expect("should have navigated into an editor")
11917                    .read(cx)
11918                    .text(cx),
11919                sample_text_3
11920            );
11921
11922            workspace
11923                .go_back(workspace.active_pane().downgrade(), cx)
11924                .detach_and_log_err(cx);
11925        })
11926        .unwrap();
11927    cx.executor().run_until_parked();
11928    workspace
11929        .update(cx, |workspace, cx| {
11930            let active_item = workspace
11931                .active_item(cx)
11932                .expect("should have an active item after navigating back from the 3rd buffer");
11933            assert_eq!(
11934                active_item.item_id(),
11935                multibuffer_item_id,
11936                "Should navigate back from the 3rd buffer to the multi buffer"
11937            );
11938            assert!(!active_item.is_singleton(cx));
11939        })
11940        .unwrap();
11941}
11942
11943#[gpui::test]
11944async fn test_toggle_hunk_diff(executor: BackgroundExecutor, cx: &mut gpui::TestAppContext) {
11945    init_test(cx, |_| {});
11946
11947    let mut cx = EditorTestContext::new(cx).await;
11948
11949    let diff_base = r#"
11950        use some::mod;
11951
11952        const A: u32 = 42;
11953
11954        fn main() {
11955            println!("hello");
11956
11957            println!("world");
11958        }
11959        "#
11960    .unindent();
11961
11962    cx.set_state(
11963        &r#"
11964        use some::modified;
11965
11966        ˇ
11967        fn main() {
11968            println!("hello there");
11969
11970            println!("around the");
11971            println!("world");
11972        }
11973        "#
11974        .unindent(),
11975    );
11976
11977    cx.set_diff_base(&diff_base);
11978    executor.run_until_parked();
11979
11980    cx.update_editor(|editor, cx| {
11981        editor.go_to_next_hunk(&GoToHunk, cx);
11982        editor.toggle_hunk_diff(&ToggleHunkDiff, cx);
11983    });
11984    executor.run_until_parked();
11985    cx.assert_state_with_diff(
11986        r#"
11987          use some::modified;
11988
11989
11990          fn main() {
11991        -     println!("hello");
11992        + ˇ    println!("hello there");
11993
11994              println!("around the");
11995              println!("world");
11996          }
11997        "#
11998        .unindent(),
11999    );
12000
12001    cx.update_editor(|editor, cx| {
12002        for _ in 0..3 {
12003            editor.go_to_next_hunk(&GoToHunk, cx);
12004            editor.toggle_hunk_diff(&ToggleHunkDiff, cx);
12005        }
12006    });
12007    executor.run_until_parked();
12008    cx.assert_state_with_diff(
12009        r#"
12010        - use some::mod;
12011        + use some::modified;
12012
12013        - const A: u32 = 42;
12014          ˇ
12015          fn main() {
12016        -     println!("hello");
12017        +     println!("hello there");
12018
12019        +     println!("around the");
12020              println!("world");
12021          }
12022        "#
12023        .unindent(),
12024    );
12025
12026    cx.update_editor(|editor, cx| {
12027        editor.cancel(&Cancel, cx);
12028    });
12029
12030    cx.assert_state_with_diff(
12031        r#"
12032          use some::modified;
12033
12034          ˇ
12035          fn main() {
12036              println!("hello there");
12037
12038              println!("around the");
12039              println!("world");
12040          }
12041        "#
12042        .unindent(),
12043    );
12044}
12045
12046#[gpui::test]
12047async fn test_diff_base_change_with_expanded_diff_hunks(
12048    executor: BackgroundExecutor,
12049    cx: &mut gpui::TestAppContext,
12050) {
12051    init_test(cx, |_| {});
12052
12053    let mut cx = EditorTestContext::new(cx).await;
12054
12055    let diff_base = r#"
12056        use some::mod1;
12057        use some::mod2;
12058
12059        const A: u32 = 42;
12060        const B: u32 = 42;
12061        const C: u32 = 42;
12062
12063        fn main() {
12064            println!("hello");
12065
12066            println!("world");
12067        }
12068        "#
12069    .unindent();
12070
12071    cx.set_state(
12072        &r#"
12073        use some::mod2;
12074
12075        const A: u32 = 42;
12076        const C: u32 = 42;
12077
12078        fn main(ˇ) {
12079            //println!("hello");
12080
12081            println!("world");
12082            //
12083            //
12084        }
12085        "#
12086        .unindent(),
12087    );
12088
12089    cx.set_diff_base(&diff_base);
12090    executor.run_until_parked();
12091
12092    cx.update_editor(|editor, cx| {
12093        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12094    });
12095    executor.run_until_parked();
12096    cx.assert_state_with_diff(
12097        r#"
12098        - use some::mod1;
12099          use some::mod2;
12100
12101          const A: u32 = 42;
12102        - const B: u32 = 42;
12103          const C: u32 = 42;
12104
12105          fn main(ˇ) {
12106        -     println!("hello");
12107        +     //println!("hello");
12108
12109              println!("world");
12110        +     //
12111        +     //
12112          }
12113        "#
12114        .unindent(),
12115    );
12116
12117    cx.set_diff_base("new diff base!");
12118    executor.run_until_parked();
12119    cx.assert_state_with_diff(
12120        r#"
12121          use some::mod2;
12122
12123          const A: u32 = 42;
12124          const C: u32 = 42;
12125
12126          fn main(ˇ) {
12127              //println!("hello");
12128
12129              println!("world");
12130              //
12131              //
12132          }
12133        "#
12134        .unindent(),
12135    );
12136
12137    cx.update_editor(|editor, cx| {
12138        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12139    });
12140    executor.run_until_parked();
12141    cx.assert_state_with_diff(
12142        r#"
12143        - new diff base!
12144        + use some::mod2;
12145        +
12146        + const A: u32 = 42;
12147        + const C: u32 = 42;
12148        +
12149        + fn main(ˇ) {
12150        +     //println!("hello");
12151        +
12152        +     println!("world");
12153        +     //
12154        +     //
12155        + }
12156        "#
12157        .unindent(),
12158    );
12159}
12160
12161#[gpui::test]
12162async fn test_fold_unfold_diff_hunk(executor: BackgroundExecutor, cx: &mut gpui::TestAppContext) {
12163    init_test(cx, |_| {});
12164
12165    let mut cx = EditorTestContext::new(cx).await;
12166
12167    let diff_base = r#"
12168        use some::mod1;
12169        use some::mod2;
12170
12171        const A: u32 = 42;
12172        const B: u32 = 42;
12173        const C: u32 = 42;
12174
12175        fn main() {
12176            println!("hello");
12177
12178            println!("world");
12179        }
12180
12181        fn another() {
12182            println!("another");
12183        }
12184
12185        fn another2() {
12186            println!("another2");
12187        }
12188        "#
12189    .unindent();
12190
12191    cx.set_state(
12192        &r#"
12193        «use some::mod2;
12194
12195        const A: u32 = 42;
12196        const C: u32 = 42;
12197
12198        fn main() {
12199            //println!("hello");
12200
12201            println!("world");
12202            //
12203            //ˇ»
12204        }
12205
12206        fn another() {
12207            println!("another");
12208            println!("another");
12209        }
12210
12211            println!("another2");
12212        }
12213        "#
12214        .unindent(),
12215    );
12216
12217    cx.set_diff_base(&diff_base);
12218    executor.run_until_parked();
12219
12220    cx.update_editor(|editor, cx| {
12221        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12222    });
12223    executor.run_until_parked();
12224
12225    cx.assert_state_with_diff(
12226        r#"
12227        - use some::mod1;
12228          «use some::mod2;
12229
12230          const A: u32 = 42;
12231        - const B: u32 = 42;
12232          const C: u32 = 42;
12233
12234          fn main() {
12235        -     println!("hello");
12236        +     //println!("hello");
12237
12238              println!("world");
12239        +     //
12240        +     //ˇ»
12241          }
12242
12243          fn another() {
12244              println!("another");
12245        +     println!("another");
12246          }
12247
12248        - fn another2() {
12249              println!("another2");
12250          }
12251        "#
12252        .unindent(),
12253    );
12254
12255    // Fold across some of the diff hunks. They should no longer appear expanded.
12256    cx.update_editor(|editor, cx| editor.fold_selected_ranges(&FoldSelectedRanges, cx));
12257    cx.executor().run_until_parked();
12258
12259    // Hunks are not shown if their position is within a fold
12260    cx.assert_state_with_diff(
12261        r#"
12262          «use some::mod2;
12263
12264          const A: u32 = 42;
12265          const C: u32 = 42;
12266
12267          fn main() {
12268              //println!("hello");
12269
12270              println!("world");
12271              //
12272              //ˇ»
12273          }
12274
12275          fn another() {
12276              println!("another");
12277        +     println!("another");
12278          }
12279
12280        - fn another2() {
12281              println!("another2");
12282          }
12283        "#
12284        .unindent(),
12285    );
12286
12287    cx.update_editor(|editor, cx| {
12288        editor.select_all(&SelectAll, cx);
12289        editor.unfold_lines(&UnfoldLines, cx);
12290    });
12291    cx.executor().run_until_parked();
12292
12293    // The deletions reappear when unfolding.
12294    cx.assert_state_with_diff(
12295        r#"
12296        - use some::mod1;
12297          «use some::mod2;
12298
12299          const A: u32 = 42;
12300        - const B: u32 = 42;
12301          const C: u32 = 42;
12302
12303          fn main() {
12304        -     println!("hello");
12305        +     //println!("hello");
12306
12307              println!("world");
12308        +     //
12309        +     //
12310          }
12311
12312          fn another() {
12313              println!("another");
12314        +     println!("another");
12315          }
12316
12317        - fn another2() {
12318              println!("another2");
12319          }
12320          ˇ»"#
12321        .unindent(),
12322    );
12323}
12324
12325#[gpui::test]
12326async fn test_toggle_diff_expand_in_multi_buffer(cx: &mut gpui::TestAppContext) {
12327    init_test(cx, |_| {});
12328
12329    let file_1_old = "aaa\nbbb\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj";
12330    let file_1_new = "aaa\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj";
12331    let file_2_old = "lll\nmmm\nnnn\nooo\nppp\nqqq\nrrr\nsss\nttt\nuuu";
12332    let file_2_new = "lll\nmmm\nNNN\nooo\nppp\nqqq\nrrr\nsss\nttt\nuuu";
12333    let file_3_old = "111\n222\n333\n444\n555\n777\n888\n999\n000\n!!!";
12334    let file_3_new = "111\n222\n333\n444\n555\n666\n777\n888\n999\n000\n!!!";
12335
12336    let buffer_1 = cx.new_model(|cx| Buffer::local(file_1_new.to_string(), cx));
12337    let buffer_2 = cx.new_model(|cx| Buffer::local(file_2_new.to_string(), cx));
12338    let buffer_3 = cx.new_model(|cx| Buffer::local(file_3_new.to_string(), cx));
12339
12340    let multi_buffer = cx.new_model(|cx| {
12341        let mut multibuffer = MultiBuffer::new(ReadWrite);
12342        multibuffer.push_excerpts(
12343            buffer_1.clone(),
12344            [
12345                ExcerptRange {
12346                    context: Point::new(0, 0)..Point::new(3, 0),
12347                    primary: None,
12348                },
12349                ExcerptRange {
12350                    context: Point::new(5, 0)..Point::new(7, 0),
12351                    primary: None,
12352                },
12353                ExcerptRange {
12354                    context: Point::new(9, 0)..Point::new(10, 3),
12355                    primary: None,
12356                },
12357            ],
12358            cx,
12359        );
12360        multibuffer.push_excerpts(
12361            buffer_2.clone(),
12362            [
12363                ExcerptRange {
12364                    context: Point::new(0, 0)..Point::new(3, 0),
12365                    primary: None,
12366                },
12367                ExcerptRange {
12368                    context: Point::new(5, 0)..Point::new(7, 0),
12369                    primary: None,
12370                },
12371                ExcerptRange {
12372                    context: Point::new(9, 0)..Point::new(10, 3),
12373                    primary: None,
12374                },
12375            ],
12376            cx,
12377        );
12378        multibuffer.push_excerpts(
12379            buffer_3.clone(),
12380            [
12381                ExcerptRange {
12382                    context: Point::new(0, 0)..Point::new(3, 0),
12383                    primary: None,
12384                },
12385                ExcerptRange {
12386                    context: Point::new(5, 0)..Point::new(7, 0),
12387                    primary: None,
12388                },
12389                ExcerptRange {
12390                    context: Point::new(9, 0)..Point::new(10, 3),
12391                    primary: None,
12392                },
12393            ],
12394            cx,
12395        );
12396        multibuffer
12397    });
12398
12399    let editor = cx.add_window(|cx| Editor::new(EditorMode::Full, multi_buffer, None, true, cx));
12400    editor
12401        .update(cx, |editor, cx| {
12402            for (buffer, diff_base) in [
12403                (buffer_1.clone(), file_1_old),
12404                (buffer_2.clone(), file_2_old),
12405                (buffer_3.clone(), file_3_old),
12406            ] {
12407                let change_set = cx.new_model(|cx| {
12408                    BufferChangeSet::new_with_base_text(
12409                        diff_base.to_string(),
12410                        buffer.read(cx).text_snapshot(),
12411                        cx,
12412                    )
12413                });
12414                editor.diff_map.add_change_set(change_set, cx)
12415            }
12416        })
12417        .unwrap();
12418
12419    let mut cx = EditorTestContext::for_editor(editor, cx).await;
12420    cx.run_until_parked();
12421
12422    cx.assert_editor_state(
12423        &"
12424            ˇaaa
12425            ccc
12426            ddd
12427
12428            ggg
12429            hhh
12430
12431
12432            lll
12433            mmm
12434            NNN
12435
12436            qqq
12437            rrr
12438
12439            uuu
12440            111
12441            222
12442            333
12443
12444            666
12445            777
12446
12447            000
12448            !!!"
12449        .unindent(),
12450    );
12451
12452    cx.update_editor(|editor, cx| {
12453        editor.select_all(&SelectAll, cx);
12454        editor.toggle_hunk_diff(&ToggleHunkDiff, cx);
12455    });
12456    cx.executor().run_until_parked();
12457
12458    cx.assert_state_with_diff(
12459        "
12460            «aaa
12461          - bbb
12462            ccc
12463            ddd
12464
12465            ggg
12466            hhh
12467
12468
12469            lll
12470            mmm
12471          - nnn
12472          + NNN
12473
12474            qqq
12475            rrr
12476
12477            uuu
12478            111
12479            222
12480            333
12481
12482          + 666
12483            777
12484
12485            000
12486            !!!ˇ»"
12487            .unindent(),
12488    );
12489}
12490
12491#[gpui::test]
12492async fn test_expand_diff_hunk_at_excerpt_boundary(cx: &mut gpui::TestAppContext) {
12493    init_test(cx, |_| {});
12494
12495    let base = "aaa\nbbb\nccc\nddd\neee\nfff\nggg\n";
12496    let text = "aaa\nBBB\nBB2\nccc\nDDD\nEEE\nfff\nggg\n";
12497
12498    let buffer = cx.new_model(|cx| Buffer::local(text.to_string(), cx));
12499    let multi_buffer = cx.new_model(|cx| {
12500        let mut multibuffer = MultiBuffer::new(ReadWrite);
12501        multibuffer.push_excerpts(
12502            buffer.clone(),
12503            [
12504                ExcerptRange {
12505                    context: Point::new(0, 0)..Point::new(2, 0),
12506                    primary: None,
12507                },
12508                ExcerptRange {
12509                    context: Point::new(5, 0)..Point::new(7, 0),
12510                    primary: None,
12511                },
12512            ],
12513            cx,
12514        );
12515        multibuffer
12516    });
12517
12518    let editor = cx.add_window(|cx| Editor::new(EditorMode::Full, multi_buffer, None, true, cx));
12519    editor
12520        .update(cx, |editor, cx| {
12521            let buffer = buffer.read(cx).text_snapshot();
12522            let change_set = cx
12523                .new_model(|cx| BufferChangeSet::new_with_base_text(base.to_string(), buffer, cx));
12524            editor.diff_map.add_change_set(change_set, cx)
12525        })
12526        .unwrap();
12527
12528    let mut cx = EditorTestContext::for_editor(editor, cx).await;
12529    cx.run_until_parked();
12530
12531    cx.update_editor(|editor, cx| editor.expand_all_hunk_diffs(&Default::default(), cx));
12532    cx.executor().run_until_parked();
12533
12534    cx.assert_state_with_diff(
12535        "
12536            ˇaaa
12537          - bbb
12538          + BBB
12539
12540          - ddd
12541          - eee
12542          + EEE
12543            fff
12544        "
12545        .unindent(),
12546    );
12547}
12548
12549#[gpui::test]
12550async fn test_edits_around_expanded_insertion_hunks(
12551    executor: BackgroundExecutor,
12552    cx: &mut gpui::TestAppContext,
12553) {
12554    init_test(cx, |_| {});
12555
12556    let mut cx = EditorTestContext::new(cx).await;
12557
12558    let diff_base = r#"
12559        use some::mod1;
12560        use some::mod2;
12561
12562        const A: u32 = 42;
12563
12564        fn main() {
12565            println!("hello");
12566
12567            println!("world");
12568        }
12569        "#
12570    .unindent();
12571    executor.run_until_parked();
12572    cx.set_state(
12573        &r#"
12574        use some::mod1;
12575        use some::mod2;
12576
12577        const A: u32 = 42;
12578        const B: u32 = 42;
12579        const C: u32 = 42;
12580        ˇ
12581
12582        fn main() {
12583            println!("hello");
12584
12585            println!("world");
12586        }
12587        "#
12588        .unindent(),
12589    );
12590
12591    cx.set_diff_base(&diff_base);
12592    executor.run_until_parked();
12593
12594    cx.update_editor(|editor, cx| {
12595        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12596    });
12597    executor.run_until_parked();
12598
12599    cx.assert_state_with_diff(
12600        r#"
12601        use some::mod1;
12602        use some::mod2;
12603
12604        const A: u32 = 42;
12605      + const B: u32 = 42;
12606      + const C: u32 = 42;
12607      + ˇ
12608
12609        fn main() {
12610            println!("hello");
12611
12612            println!("world");
12613        }
12614        "#
12615        .unindent(),
12616    );
12617
12618    cx.update_editor(|editor, cx| editor.handle_input("const D: u32 = 42;\n", cx));
12619    executor.run_until_parked();
12620
12621    cx.assert_state_with_diff(
12622        r#"
12623        use some::mod1;
12624        use some::mod2;
12625
12626        const A: u32 = 42;
12627      + const B: u32 = 42;
12628      + const C: u32 = 42;
12629      + const D: u32 = 42;
12630      + ˇ
12631
12632        fn main() {
12633            println!("hello");
12634
12635            println!("world");
12636        }
12637        "#
12638        .unindent(),
12639    );
12640
12641    cx.update_editor(|editor, cx| editor.handle_input("const E: u32 = 42;\n", cx));
12642    executor.run_until_parked();
12643
12644    cx.assert_state_with_diff(
12645        r#"
12646        use some::mod1;
12647        use some::mod2;
12648
12649        const A: u32 = 42;
12650      + const B: u32 = 42;
12651      + const C: u32 = 42;
12652      + const D: u32 = 42;
12653      + const E: u32 = 42;
12654      + ˇ
12655
12656        fn main() {
12657            println!("hello");
12658
12659            println!("world");
12660        }
12661        "#
12662        .unindent(),
12663    );
12664
12665    cx.update_editor(|editor, cx| {
12666        editor.delete_line(&DeleteLine, cx);
12667    });
12668    executor.run_until_parked();
12669
12670    cx.assert_state_with_diff(
12671        r#"
12672        use some::mod1;
12673        use some::mod2;
12674
12675        const A: u32 = 42;
12676      + const B: u32 = 42;
12677      + const C: u32 = 42;
12678      + const D: u32 = 42;
12679      + const E: u32 = 42;
12680        ˇ
12681        fn main() {
12682            println!("hello");
12683
12684            println!("world");
12685        }
12686        "#
12687        .unindent(),
12688    );
12689
12690    cx.update_editor(|editor, cx| {
12691        editor.move_up(&MoveUp, cx);
12692        editor.delete_line(&DeleteLine, cx);
12693        editor.move_up(&MoveUp, cx);
12694        editor.delete_line(&DeleteLine, cx);
12695        editor.move_up(&MoveUp, cx);
12696        editor.delete_line(&DeleteLine, cx);
12697    });
12698    executor.run_until_parked();
12699    cx.assert_state_with_diff(
12700        r#"
12701        use some::mod1;
12702        use some::mod2;
12703
12704        const A: u32 = 42;
12705      + const B: u32 = 42;
12706        ˇ
12707        fn main() {
12708            println!("hello");
12709
12710            println!("world");
12711        }
12712        "#
12713        .unindent(),
12714    );
12715
12716    cx.update_editor(|editor, cx| {
12717        editor.select_up_by_lines(&SelectUpByLines { lines: 5 }, cx);
12718        editor.delete_line(&DeleteLine, cx);
12719    });
12720    executor.run_until_parked();
12721    cx.assert_state_with_diff(
12722        r#"
12723        use some::mod1;
12724      - use some::mod2;
12725      -
12726      - const A: u32 = 42;
12727        ˇ
12728        fn main() {
12729            println!("hello");
12730
12731            println!("world");
12732        }
12733        "#
12734        .unindent(),
12735    );
12736}
12737
12738#[gpui::test]
12739async fn test_edits_around_expanded_deletion_hunks(
12740    executor: BackgroundExecutor,
12741    cx: &mut gpui::TestAppContext,
12742) {
12743    init_test(cx, |_| {});
12744
12745    let mut cx = EditorTestContext::new(cx).await;
12746
12747    let diff_base = r#"
12748        use some::mod1;
12749        use some::mod2;
12750
12751        const A: u32 = 42;
12752        const B: u32 = 42;
12753        const C: u32 = 42;
12754
12755
12756        fn main() {
12757            println!("hello");
12758
12759            println!("world");
12760        }
12761    "#
12762    .unindent();
12763    executor.run_until_parked();
12764    cx.set_state(
12765        &r#"
12766        use some::mod1;
12767        use some::mod2;
12768
12769        ˇconst B: u32 = 42;
12770        const C: u32 = 42;
12771
12772
12773        fn main() {
12774            println!("hello");
12775
12776            println!("world");
12777        }
12778        "#
12779        .unindent(),
12780    );
12781
12782    cx.set_diff_base(&diff_base);
12783    executor.run_until_parked();
12784
12785    cx.update_editor(|editor, cx| {
12786        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12787    });
12788    executor.run_until_parked();
12789
12790    cx.assert_state_with_diff(
12791        r#"
12792        use some::mod1;
12793        use some::mod2;
12794
12795      - const A: u32 = 42;
12796        ˇconst B: u32 = 42;
12797        const C: u32 = 42;
12798
12799
12800        fn main() {
12801            println!("hello");
12802
12803            println!("world");
12804        }
12805        "#
12806        .unindent(),
12807    );
12808
12809    cx.update_editor(|editor, cx| {
12810        editor.delete_line(&DeleteLine, cx);
12811    });
12812    executor.run_until_parked();
12813    cx.assert_state_with_diff(
12814        r#"
12815        use some::mod1;
12816        use some::mod2;
12817
12818      - const A: u32 = 42;
12819      - const B: u32 = 42;
12820        ˇconst C: u32 = 42;
12821
12822
12823        fn main() {
12824            println!("hello");
12825
12826            println!("world");
12827        }
12828        "#
12829        .unindent(),
12830    );
12831
12832    cx.update_editor(|editor, cx| {
12833        editor.delete_line(&DeleteLine, cx);
12834    });
12835    executor.run_until_parked();
12836    cx.assert_state_with_diff(
12837        r#"
12838        use some::mod1;
12839        use some::mod2;
12840
12841      - const A: u32 = 42;
12842      - const B: u32 = 42;
12843      - const C: u32 = 42;
12844        ˇ
12845
12846        fn main() {
12847            println!("hello");
12848
12849            println!("world");
12850        }
12851        "#
12852        .unindent(),
12853    );
12854
12855    cx.update_editor(|editor, cx| {
12856        editor.handle_input("replacement", cx);
12857    });
12858    executor.run_until_parked();
12859    cx.assert_state_with_diff(
12860        r#"
12861        use some::mod1;
12862        use some::mod2;
12863
12864      - const A: u32 = 42;
12865      - const B: u32 = 42;
12866      - const C: u32 = 42;
12867      -
12868      + replacementˇ
12869
12870        fn main() {
12871            println!("hello");
12872
12873            println!("world");
12874        }
12875        "#
12876        .unindent(),
12877    );
12878}
12879
12880#[gpui::test]
12881async fn test_edit_after_expanded_modification_hunk(
12882    executor: BackgroundExecutor,
12883    cx: &mut gpui::TestAppContext,
12884) {
12885    init_test(cx, |_| {});
12886
12887    let mut cx = EditorTestContext::new(cx).await;
12888
12889    let diff_base = r#"
12890        use some::mod1;
12891        use some::mod2;
12892
12893        const A: u32 = 42;
12894        const B: u32 = 42;
12895        const C: u32 = 42;
12896        const D: u32 = 42;
12897
12898
12899        fn main() {
12900            println!("hello");
12901
12902            println!("world");
12903        }"#
12904    .unindent();
12905
12906    cx.set_state(
12907        &r#"
12908        use some::mod1;
12909        use some::mod2;
12910
12911        const A: u32 = 42;
12912        const B: u32 = 42;
12913        const C: u32 = 43ˇ
12914        const D: u32 = 42;
12915
12916
12917        fn main() {
12918            println!("hello");
12919
12920            println!("world");
12921        }"#
12922        .unindent(),
12923    );
12924
12925    cx.set_diff_base(&diff_base);
12926    executor.run_until_parked();
12927    cx.update_editor(|editor, cx| {
12928        editor.expand_all_hunk_diffs(&ExpandAllHunkDiffs, cx);
12929    });
12930    executor.run_until_parked();
12931
12932    cx.assert_state_with_diff(
12933        r#"
12934        use some::mod1;
12935        use some::mod2;
12936
12937        const A: u32 = 42;
12938        const B: u32 = 42;
12939      - const C: u32 = 42;
12940      + const C: u32 = 43ˇ
12941        const D: u32 = 42;
12942
12943
12944        fn main() {
12945            println!("hello");
12946
12947            println!("world");
12948        }"#
12949        .unindent(),
12950    );
12951
12952    cx.update_editor(|editor, cx| {
12953        editor.handle_input("\nnew_line\n", cx);
12954    });
12955    executor.run_until_parked();
12956
12957    cx.assert_state_with_diff(
12958        r#"
12959        use some::mod1;
12960        use some::mod2;
12961
12962        const A: u32 = 42;
12963        const B: u32 = 42;
12964      - const C: u32 = 42;
12965      + const C: u32 = 43
12966      + new_line
12967      + ˇ
12968        const D: u32 = 42;
12969
12970
12971        fn main() {
12972            println!("hello");
12973
12974            println!("world");
12975        }"#
12976        .unindent(),
12977    );
12978}
12979
12980async fn setup_indent_guides_editor(
12981    text: &str,
12982    cx: &mut gpui::TestAppContext,
12983) -> (BufferId, EditorTestContext) {
12984    init_test(cx, |_| {});
12985
12986    let mut cx = EditorTestContext::new(cx).await;
12987
12988    let buffer_id = cx.update_editor(|editor, cx| {
12989        editor.set_text(text, cx);
12990        let buffer_ids = editor.buffer().read(cx).excerpt_buffer_ids();
12991
12992        buffer_ids[0]
12993    });
12994
12995    (buffer_id, cx)
12996}
12997
12998fn assert_indent_guides(
12999    range: Range<u32>,
13000    expected: Vec<IndentGuide>,
13001    active_indices: Option<Vec<usize>>,
13002    cx: &mut EditorTestContext,
13003) {
13004    let indent_guides = cx.update_editor(|editor, cx| {
13005        let snapshot = editor.snapshot(cx).display_snapshot;
13006        let mut indent_guides: Vec<_> = crate::indent_guides::indent_guides_in_range(
13007            MultiBufferRow(range.start)..MultiBufferRow(range.end),
13008            true,
13009            &snapshot,
13010            cx,
13011        );
13012
13013        indent_guides.sort_by(|a, b| {
13014            a.depth.cmp(&b.depth).then(
13015                a.start_row
13016                    .cmp(&b.start_row)
13017                    .then(a.end_row.cmp(&b.end_row)),
13018            )
13019        });
13020        indent_guides
13021    });
13022
13023    if let Some(expected) = active_indices {
13024        let active_indices = cx.update_editor(|editor, cx| {
13025            let snapshot = editor.snapshot(cx).display_snapshot;
13026            editor.find_active_indent_guide_indices(&indent_guides, &snapshot, cx)
13027        });
13028
13029        assert_eq!(
13030            active_indices.unwrap().into_iter().collect::<Vec<_>>(),
13031            expected,
13032            "Active indent guide indices do not match"
13033        );
13034    }
13035
13036    let expected: Vec<_> = expected
13037        .into_iter()
13038        .map(|guide| MultiBufferIndentGuide {
13039            multibuffer_row_range: MultiBufferRow(guide.start_row)..MultiBufferRow(guide.end_row),
13040            buffer: guide,
13041        })
13042        .collect();
13043
13044    assert_eq!(indent_guides, expected, "Indent guides do not match");
13045}
13046
13047fn indent_guide(buffer_id: BufferId, start_row: u32, end_row: u32, depth: u32) -> IndentGuide {
13048    IndentGuide {
13049        buffer_id,
13050        start_row,
13051        end_row,
13052        depth,
13053        tab_size: 4,
13054        settings: IndentGuideSettings {
13055            enabled: true,
13056            line_width: 1,
13057            active_line_width: 1,
13058            ..Default::default()
13059        },
13060    }
13061}
13062
13063#[gpui::test]
13064async fn test_indent_guide_single_line(cx: &mut gpui::TestAppContext) {
13065    let (buffer_id, mut cx) = setup_indent_guides_editor(
13066        &"
13067    fn main() {
13068        let a = 1;
13069    }"
13070        .unindent(),
13071        cx,
13072    )
13073    .await;
13074
13075    assert_indent_guides(0..3, vec![indent_guide(buffer_id, 1, 1, 0)], None, &mut cx);
13076}
13077
13078#[gpui::test]
13079async fn test_indent_guide_simple_block(cx: &mut gpui::TestAppContext) {
13080    let (buffer_id, mut cx) = setup_indent_guides_editor(
13081        &"
13082    fn main() {
13083        let a = 1;
13084        let b = 2;
13085    }"
13086        .unindent(),
13087        cx,
13088    )
13089    .await;
13090
13091    assert_indent_guides(0..4, vec![indent_guide(buffer_id, 1, 2, 0)], None, &mut cx);
13092}
13093
13094#[gpui::test]
13095async fn test_indent_guide_nested(cx: &mut gpui::TestAppContext) {
13096    let (buffer_id, mut cx) = setup_indent_guides_editor(
13097        &"
13098    fn main() {
13099        let a = 1;
13100        if a == 3 {
13101            let b = 2;
13102        } else {
13103            let c = 3;
13104        }
13105    }"
13106        .unindent(),
13107        cx,
13108    )
13109    .await;
13110
13111    assert_indent_guides(
13112        0..8,
13113        vec![
13114            indent_guide(buffer_id, 1, 6, 0),
13115            indent_guide(buffer_id, 3, 3, 1),
13116            indent_guide(buffer_id, 5, 5, 1),
13117        ],
13118        None,
13119        &mut cx,
13120    );
13121}
13122
13123#[gpui::test]
13124async fn test_indent_guide_tab(cx: &mut gpui::TestAppContext) {
13125    let (buffer_id, mut cx) = setup_indent_guides_editor(
13126        &"
13127    fn main() {
13128        let a = 1;
13129            let b = 2;
13130        let c = 3;
13131    }"
13132        .unindent(),
13133        cx,
13134    )
13135    .await;
13136
13137    assert_indent_guides(
13138        0..5,
13139        vec![
13140            indent_guide(buffer_id, 1, 3, 0),
13141            indent_guide(buffer_id, 2, 2, 1),
13142        ],
13143        None,
13144        &mut cx,
13145    );
13146}
13147
13148#[gpui::test]
13149async fn test_indent_guide_continues_on_empty_line(cx: &mut gpui::TestAppContext) {
13150    let (buffer_id, mut cx) = setup_indent_guides_editor(
13151        &"
13152        fn main() {
13153            let a = 1;
13154
13155            let c = 3;
13156        }"
13157        .unindent(),
13158        cx,
13159    )
13160    .await;
13161
13162    assert_indent_guides(0..5, vec![indent_guide(buffer_id, 1, 3, 0)], None, &mut cx);
13163}
13164
13165#[gpui::test]
13166async fn test_indent_guide_complex(cx: &mut gpui::TestAppContext) {
13167    let (buffer_id, mut cx) = setup_indent_guides_editor(
13168        &"
13169        fn main() {
13170            let a = 1;
13171
13172            let c = 3;
13173
13174            if a == 3 {
13175                let b = 2;
13176            } else {
13177                let c = 3;
13178            }
13179        }"
13180        .unindent(),
13181        cx,
13182    )
13183    .await;
13184
13185    assert_indent_guides(
13186        0..11,
13187        vec![
13188            indent_guide(buffer_id, 1, 9, 0),
13189            indent_guide(buffer_id, 6, 6, 1),
13190            indent_guide(buffer_id, 8, 8, 1),
13191        ],
13192        None,
13193        &mut cx,
13194    );
13195}
13196
13197#[gpui::test]
13198async fn test_indent_guide_starts_off_screen(cx: &mut gpui::TestAppContext) {
13199    let (buffer_id, mut cx) = setup_indent_guides_editor(
13200        &"
13201        fn main() {
13202            let a = 1;
13203
13204            let c = 3;
13205
13206            if a == 3 {
13207                let b = 2;
13208            } else {
13209                let c = 3;
13210            }
13211        }"
13212        .unindent(),
13213        cx,
13214    )
13215    .await;
13216
13217    assert_indent_guides(
13218        1..11,
13219        vec![
13220            indent_guide(buffer_id, 1, 9, 0),
13221            indent_guide(buffer_id, 6, 6, 1),
13222            indent_guide(buffer_id, 8, 8, 1),
13223        ],
13224        None,
13225        &mut cx,
13226    );
13227}
13228
13229#[gpui::test]
13230async fn test_indent_guide_ends_off_screen(cx: &mut gpui::TestAppContext) {
13231    let (buffer_id, mut cx) = setup_indent_guides_editor(
13232        &"
13233        fn main() {
13234            let a = 1;
13235
13236            let c = 3;
13237
13238            if a == 3 {
13239                let b = 2;
13240            } else {
13241                let c = 3;
13242            }
13243        }"
13244        .unindent(),
13245        cx,
13246    )
13247    .await;
13248
13249    assert_indent_guides(
13250        1..10,
13251        vec![
13252            indent_guide(buffer_id, 1, 9, 0),
13253            indent_guide(buffer_id, 6, 6, 1),
13254            indent_guide(buffer_id, 8, 8, 1),
13255        ],
13256        None,
13257        &mut cx,
13258    );
13259}
13260
13261#[gpui::test]
13262async fn test_indent_guide_without_brackets(cx: &mut gpui::TestAppContext) {
13263    let (buffer_id, mut cx) = setup_indent_guides_editor(
13264        &"
13265        block1
13266            block2
13267                block3
13268                    block4
13269            block2
13270        block1
13271        block1"
13272            .unindent(),
13273        cx,
13274    )
13275    .await;
13276
13277    assert_indent_guides(
13278        1..10,
13279        vec![
13280            indent_guide(buffer_id, 1, 4, 0),
13281            indent_guide(buffer_id, 2, 3, 1),
13282            indent_guide(buffer_id, 3, 3, 2),
13283        ],
13284        None,
13285        &mut cx,
13286    );
13287}
13288
13289#[gpui::test]
13290async fn test_indent_guide_ends_before_empty_line(cx: &mut gpui::TestAppContext) {
13291    let (buffer_id, mut cx) = setup_indent_guides_editor(
13292        &"
13293        block1
13294            block2
13295                block3
13296
13297        block1
13298        block1"
13299            .unindent(),
13300        cx,
13301    )
13302    .await;
13303
13304    assert_indent_guides(
13305        0..6,
13306        vec![
13307            indent_guide(buffer_id, 1, 2, 0),
13308            indent_guide(buffer_id, 2, 2, 1),
13309        ],
13310        None,
13311        &mut cx,
13312    );
13313}
13314
13315#[gpui::test]
13316async fn test_indent_guide_continuing_off_screen(cx: &mut gpui::TestAppContext) {
13317    let (buffer_id, mut cx) = setup_indent_guides_editor(
13318        &"
13319        block1
13320
13321
13322
13323            block2
13324        "
13325        .unindent(),
13326        cx,
13327    )
13328    .await;
13329
13330    assert_indent_guides(0..1, vec![indent_guide(buffer_id, 1, 1, 0)], None, &mut cx);
13331}
13332
13333#[gpui::test]
13334async fn test_indent_guide_tabs(cx: &mut gpui::TestAppContext) {
13335    let (buffer_id, mut cx) = setup_indent_guides_editor(
13336        &"
13337        def a:
13338        \tb = 3
13339        \tif True:
13340        \t\tc = 4
13341        \t\td = 5
13342        \tprint(b)
13343        "
13344        .unindent(),
13345        cx,
13346    )
13347    .await;
13348
13349    assert_indent_guides(
13350        0..6,
13351        vec![
13352            indent_guide(buffer_id, 1, 6, 0),
13353            indent_guide(buffer_id, 3, 4, 1),
13354        ],
13355        None,
13356        &mut cx,
13357    );
13358}
13359
13360#[gpui::test]
13361async fn test_active_indent_guide_single_line(cx: &mut gpui::TestAppContext) {
13362    let (buffer_id, mut cx) = setup_indent_guides_editor(
13363        &"
13364    fn main() {
13365        let a = 1;
13366    }"
13367        .unindent(),
13368        cx,
13369    )
13370    .await;
13371
13372    cx.update_editor(|editor, cx| {
13373        editor.change_selections(None, cx, |s| {
13374            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
13375        });
13376    });
13377
13378    assert_indent_guides(
13379        0..3,
13380        vec![indent_guide(buffer_id, 1, 1, 0)],
13381        Some(vec![0]),
13382        &mut cx,
13383    );
13384}
13385
13386#[gpui::test]
13387async fn test_active_indent_guide_respect_indented_range(cx: &mut gpui::TestAppContext) {
13388    let (buffer_id, mut cx) = setup_indent_guides_editor(
13389        &"
13390    fn main() {
13391        if 1 == 2 {
13392            let a = 1;
13393        }
13394    }"
13395        .unindent(),
13396        cx,
13397    )
13398    .await;
13399
13400    cx.update_editor(|editor, cx| {
13401        editor.change_selections(None, cx, |s| {
13402            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
13403        });
13404    });
13405
13406    assert_indent_guides(
13407        0..4,
13408        vec![
13409            indent_guide(buffer_id, 1, 3, 0),
13410            indent_guide(buffer_id, 2, 2, 1),
13411        ],
13412        Some(vec![1]),
13413        &mut cx,
13414    );
13415
13416    cx.update_editor(|editor, cx| {
13417        editor.change_selections(None, cx, |s| {
13418            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
13419        });
13420    });
13421
13422    assert_indent_guides(
13423        0..4,
13424        vec![
13425            indent_guide(buffer_id, 1, 3, 0),
13426            indent_guide(buffer_id, 2, 2, 1),
13427        ],
13428        Some(vec![1]),
13429        &mut cx,
13430    );
13431
13432    cx.update_editor(|editor, cx| {
13433        editor.change_selections(None, cx, |s| {
13434            s.select_ranges([Point::new(3, 0)..Point::new(3, 0)])
13435        });
13436    });
13437
13438    assert_indent_guides(
13439        0..4,
13440        vec![
13441            indent_guide(buffer_id, 1, 3, 0),
13442            indent_guide(buffer_id, 2, 2, 1),
13443        ],
13444        Some(vec![0]),
13445        &mut cx,
13446    );
13447}
13448
13449#[gpui::test]
13450async fn test_active_indent_guide_empty_line(cx: &mut gpui::TestAppContext) {
13451    let (buffer_id, mut cx) = setup_indent_guides_editor(
13452        &"
13453    fn main() {
13454        let a = 1;
13455
13456        let b = 2;
13457    }"
13458        .unindent(),
13459        cx,
13460    )
13461    .await;
13462
13463    cx.update_editor(|editor, cx| {
13464        editor.change_selections(None, cx, |s| {
13465            s.select_ranges([Point::new(2, 0)..Point::new(2, 0)])
13466        });
13467    });
13468
13469    assert_indent_guides(
13470        0..5,
13471        vec![indent_guide(buffer_id, 1, 3, 0)],
13472        Some(vec![0]),
13473        &mut cx,
13474    );
13475}
13476
13477#[gpui::test]
13478async fn test_active_indent_guide_non_matching_indent(cx: &mut gpui::TestAppContext) {
13479    let (buffer_id, mut cx) = setup_indent_guides_editor(
13480        &"
13481    def m:
13482        a = 1
13483        pass"
13484            .unindent(),
13485        cx,
13486    )
13487    .await;
13488
13489    cx.update_editor(|editor, cx| {
13490        editor.change_selections(None, cx, |s| {
13491            s.select_ranges([Point::new(1, 0)..Point::new(1, 0)])
13492        });
13493    });
13494
13495    assert_indent_guides(
13496        0..3,
13497        vec![indent_guide(buffer_id, 1, 2, 0)],
13498        Some(vec![0]),
13499        &mut cx,
13500    );
13501}
13502
13503#[gpui::test]
13504fn test_crease_insertion_and_rendering(cx: &mut TestAppContext) {
13505    init_test(cx, |_| {});
13506
13507    let editor = cx.add_window(|cx| {
13508        let buffer = MultiBuffer::build_simple("aaaaaa\nbbbbbb\ncccccc\nddddddd\n", cx);
13509        build_editor(buffer, cx)
13510    });
13511
13512    let render_args = Arc::new(Mutex::new(None));
13513    let snapshot = editor
13514        .update(cx, |editor, cx| {
13515            let snapshot = editor.buffer().read(cx).snapshot(cx);
13516            let range =
13517                snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(2, 6));
13518
13519            struct RenderArgs {
13520                row: MultiBufferRow,
13521                folded: bool,
13522                callback: Arc<dyn Fn(bool, &mut WindowContext) + Send + Sync>,
13523            }
13524
13525            let crease = Crease::inline(
13526                range,
13527                FoldPlaceholder::test(),
13528                {
13529                    let toggle_callback = render_args.clone();
13530                    move |row, folded, callback, _cx| {
13531                        *toggle_callback.lock() = Some(RenderArgs {
13532                            row,
13533                            folded,
13534                            callback,
13535                        });
13536                        div()
13537                    }
13538                },
13539                |_row, _folded, _cx| div(),
13540            );
13541
13542            editor.insert_creases(Some(crease), cx);
13543            let snapshot = editor.snapshot(cx);
13544            let _div =
13545                snapshot.render_crease_toggle(MultiBufferRow(1), false, cx.view().clone(), cx);
13546            snapshot
13547        })
13548        .unwrap();
13549
13550    let render_args = render_args.lock().take().unwrap();
13551    assert_eq!(render_args.row, MultiBufferRow(1));
13552    assert!(!render_args.folded);
13553    assert!(!snapshot.is_line_folded(MultiBufferRow(1)));
13554
13555    cx.update_window(*editor, |_, cx| (render_args.callback)(true, cx))
13556        .unwrap();
13557    let snapshot = editor.update(cx, |editor, cx| editor.snapshot(cx)).unwrap();
13558    assert!(snapshot.is_line_folded(MultiBufferRow(1)));
13559
13560    cx.update_window(*editor, |_, cx| (render_args.callback)(false, cx))
13561        .unwrap();
13562    let snapshot = editor.update(cx, |editor, cx| editor.snapshot(cx)).unwrap();
13563    assert!(!snapshot.is_line_folded(MultiBufferRow(1)));
13564}
13565
13566#[gpui::test]
13567async fn test_input_text(cx: &mut gpui::TestAppContext) {
13568    init_test(cx, |_| {});
13569    let mut cx = EditorTestContext::new(cx).await;
13570
13571    cx.set_state(
13572        &r#"ˇone
13573        two
13574
13575        three
13576        fourˇ
13577        five
13578
13579        siˇx"#
13580            .unindent(),
13581    );
13582
13583    cx.dispatch_action(HandleInput(String::new()));
13584    cx.assert_editor_state(
13585        &r#"ˇone
13586        two
13587
13588        three
13589        fourˇ
13590        five
13591
13592        siˇx"#
13593            .unindent(),
13594    );
13595
13596    cx.dispatch_action(HandleInput("AAAA".to_string()));
13597    cx.assert_editor_state(
13598        &r#"AAAAˇone
13599        two
13600
13601        three
13602        fourAAAAˇ
13603        five
13604
13605        siAAAAˇx"#
13606            .unindent(),
13607    );
13608}
13609
13610#[gpui::test]
13611async fn test_scroll_cursor_center_top_bottom(cx: &mut gpui::TestAppContext) {
13612    init_test(cx, |_| {});
13613
13614    let mut cx = EditorTestContext::new(cx).await;
13615    cx.set_state(
13616        r#"let foo = 1;
13617let foo = 2;
13618let foo = 3;
13619let fooˇ = 4;
13620let foo = 5;
13621let foo = 6;
13622let foo = 7;
13623let foo = 8;
13624let foo = 9;
13625let foo = 10;
13626let foo = 11;
13627let foo = 12;
13628let foo = 13;
13629let foo = 14;
13630let foo = 15;"#,
13631    );
13632
13633    cx.update_editor(|e, cx| {
13634        assert_eq!(
13635            e.next_scroll_position,
13636            NextScrollCursorCenterTopBottom::Center,
13637            "Default next scroll direction is center",
13638        );
13639
13640        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, cx);
13641        assert_eq!(
13642            e.next_scroll_position,
13643            NextScrollCursorCenterTopBottom::Top,
13644            "After center, next scroll direction should be top",
13645        );
13646
13647        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, cx);
13648        assert_eq!(
13649            e.next_scroll_position,
13650            NextScrollCursorCenterTopBottom::Bottom,
13651            "After top, next scroll direction should be bottom",
13652        );
13653
13654        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, cx);
13655        assert_eq!(
13656            e.next_scroll_position,
13657            NextScrollCursorCenterTopBottom::Center,
13658            "After bottom, scrolling should start over",
13659        );
13660
13661        e.scroll_cursor_center_top_bottom(&ScrollCursorCenterTopBottom, cx);
13662        assert_eq!(
13663            e.next_scroll_position,
13664            NextScrollCursorCenterTopBottom::Top,
13665            "Scrolling continues if retriggered fast enough"
13666        );
13667    });
13668
13669    cx.executor()
13670        .advance_clock(SCROLL_CENTER_TOP_BOTTOM_DEBOUNCE_TIMEOUT + Duration::from_millis(200));
13671    cx.executor().run_until_parked();
13672    cx.update_editor(|e, _| {
13673        assert_eq!(
13674            e.next_scroll_position,
13675            NextScrollCursorCenterTopBottom::Center,
13676            "If scrolling is not triggered fast enough, it should reset"
13677        );
13678    });
13679}
13680
13681#[gpui::test]
13682async fn test_goto_definition_with_find_all_references_fallback(cx: &mut gpui::TestAppContext) {
13683    init_test(cx, |_| {});
13684    let mut cx = EditorLspTestContext::new_rust(
13685        lsp::ServerCapabilities {
13686            definition_provider: Some(lsp::OneOf::Left(true)),
13687            references_provider: Some(lsp::OneOf::Left(true)),
13688            ..lsp::ServerCapabilities::default()
13689        },
13690        cx,
13691    )
13692    .await;
13693
13694    let set_up_lsp_handlers = |empty_go_to_definition: bool, cx: &mut EditorLspTestContext| {
13695        let go_to_definition = cx.lsp.handle_request::<lsp::request::GotoDefinition, _, _>(
13696            move |params, _| async move {
13697                if empty_go_to_definition {
13698                    Ok(None)
13699                } else {
13700                    Ok(Some(lsp::GotoDefinitionResponse::Scalar(lsp::Location {
13701                        uri: params.text_document_position_params.text_document.uri,
13702                        range: lsp::Range::new(lsp::Position::new(4, 3), lsp::Position::new(4, 6)),
13703                    })))
13704                }
13705            },
13706        );
13707        let references =
13708            cx.lsp
13709                .handle_request::<lsp::request::References, _, _>(move |params, _| async move {
13710                    Ok(Some(vec![lsp::Location {
13711                        uri: params.text_document_position.text_document.uri,
13712                        range: lsp::Range::new(lsp::Position::new(0, 8), lsp::Position::new(0, 11)),
13713                    }]))
13714                });
13715        (go_to_definition, references)
13716    };
13717
13718    cx.set_state(
13719        &r#"fn one() {
13720            let mut a = ˇtwo();
13721        }
13722
13723        fn two() {}"#
13724            .unindent(),
13725    );
13726    set_up_lsp_handlers(false, &mut cx);
13727    let navigated = cx
13728        .update_editor(|editor, cx| editor.go_to_definition(&GoToDefinition, cx))
13729        .await
13730        .expect("Failed to navigate to definition");
13731    assert_eq!(
13732        navigated,
13733        Navigated::Yes,
13734        "Should have navigated to definition from the GetDefinition response"
13735    );
13736    cx.assert_editor_state(
13737        &r#"fn one() {
13738            let mut a = two();
13739        }
13740
13741        fn «twoˇ»() {}"#
13742            .unindent(),
13743    );
13744
13745    let editors = cx.update_workspace(|workspace, cx| {
13746        workspace.items_of_type::<Editor>(cx).collect::<Vec<_>>()
13747    });
13748    cx.update_editor(|_, test_editor_cx| {
13749        assert_eq!(
13750            editors.len(),
13751            1,
13752            "Initially, only one, test, editor should be open in the workspace"
13753        );
13754        assert_eq!(
13755            test_editor_cx.view(),
13756            editors.last().expect("Asserted len is 1")
13757        );
13758    });
13759
13760    set_up_lsp_handlers(true, &mut cx);
13761    let navigated = cx
13762        .update_editor(|editor, cx| editor.go_to_definition(&GoToDefinition, cx))
13763        .await
13764        .expect("Failed to navigate to lookup references");
13765    assert_eq!(
13766        navigated,
13767        Navigated::Yes,
13768        "Should have navigated to references as a fallback after empty GoToDefinition response"
13769    );
13770    // We should not change the selections in the existing file,
13771    // if opening another milti buffer with the references
13772    cx.assert_editor_state(
13773        &r#"fn one() {
13774            let mut a = two();
13775        }
13776
13777        fn «twoˇ»() {}"#
13778            .unindent(),
13779    );
13780    let editors = cx.update_workspace(|workspace, cx| {
13781        workspace.items_of_type::<Editor>(cx).collect::<Vec<_>>()
13782    });
13783    cx.update_editor(|_, test_editor_cx| {
13784        assert_eq!(
13785            editors.len(),
13786            2,
13787            "After falling back to references search, we open a new editor with the results"
13788        );
13789        let references_fallback_text = editors
13790            .into_iter()
13791            .find(|new_editor| new_editor != test_editor_cx.view())
13792            .expect("Should have one non-test editor now")
13793            .read(test_editor_cx)
13794            .text(test_editor_cx);
13795        assert_eq!(
13796            references_fallback_text, "fn one() {\n    let mut a = two();\n}",
13797            "Should use the range from the references response and not the GoToDefinition one"
13798        );
13799    });
13800}
13801
13802#[gpui::test]
13803async fn test_find_enclosing_node_with_task(cx: &mut gpui::TestAppContext) {
13804    init_test(cx, |_| {});
13805
13806    let language = Arc::new(Language::new(
13807        LanguageConfig::default(),
13808        Some(tree_sitter_rust::LANGUAGE.into()),
13809    ));
13810
13811    let text = r#"
13812        #[cfg(test)]
13813        mod tests() {
13814            #[test]
13815            fn runnable_1() {
13816                let a = 1;
13817            }
13818
13819            #[test]
13820            fn runnable_2() {
13821                let a = 1;
13822                let b = 2;
13823            }
13824        }
13825    "#
13826    .unindent();
13827
13828    let fs = FakeFs::new(cx.executor());
13829    fs.insert_file("/file.rs", Default::default()).await;
13830
13831    let project = Project::test(fs, ["/a".as_ref()], cx).await;
13832    let workspace = cx.add_window(|cx| Workspace::test_new(project.clone(), cx));
13833    let cx = &mut VisualTestContext::from_window(*workspace.deref(), cx);
13834    let buffer = cx.new_model(|cx| Buffer::local(text, cx).with_language(language, cx));
13835    let multi_buffer = cx.new_model(|cx| MultiBuffer::singleton(buffer.clone(), cx));
13836
13837    let editor = cx.new_view(|cx| {
13838        Editor::new(
13839            EditorMode::Full,
13840            multi_buffer,
13841            Some(project.clone()),
13842            true,
13843            cx,
13844        )
13845    });
13846
13847    editor.update(cx, |editor, cx| {
13848        editor.tasks.insert(
13849            (buffer.read(cx).remote_id(), 3),
13850            RunnableTasks {
13851                templates: vec![],
13852                offset: MultiBufferOffset(43),
13853                column: 0,
13854                extra_variables: HashMap::default(),
13855                context_range: BufferOffset(43)..BufferOffset(85),
13856            },
13857        );
13858        editor.tasks.insert(
13859            (buffer.read(cx).remote_id(), 8),
13860            RunnableTasks {
13861                templates: vec![],
13862                offset: MultiBufferOffset(86),
13863                column: 0,
13864                extra_variables: HashMap::default(),
13865                context_range: BufferOffset(86)..BufferOffset(191),
13866            },
13867        );
13868
13869        // Test finding task when cursor is inside function body
13870        editor.change_selections(None, cx, |s| {
13871            s.select_ranges([Point::new(4, 5)..Point::new(4, 5)])
13872        });
13873        let (_, row, _) = editor.find_enclosing_node_task(cx).unwrap();
13874        assert_eq!(row, 3, "Should find task for cursor inside runnable_1");
13875
13876        // Test finding task when cursor is on function name
13877        editor.change_selections(None, cx, |s| {
13878            s.select_ranges([Point::new(8, 4)..Point::new(8, 4)])
13879        });
13880        let (_, row, _) = editor.find_enclosing_node_task(cx).unwrap();
13881        assert_eq!(row, 8, "Should find task when cursor is on function name");
13882    });
13883}
13884
13885fn empty_range(row: usize, column: usize) -> Range<DisplayPoint> {
13886    let point = DisplayPoint::new(DisplayRow(row as u32), column as u32);
13887    point..point
13888}
13889
13890fn assert_selection_ranges(marked_text: &str, view: &mut Editor, cx: &mut ViewContext<Editor>) {
13891    let (text, ranges) = marked_text_ranges(marked_text, true);
13892    assert_eq!(view.text(cx), text);
13893    assert_eq!(
13894        view.selections.ranges(cx),
13895        ranges,
13896        "Assert selections are {}",
13897        marked_text
13898    );
13899}
13900
13901pub fn handle_signature_help_request(
13902    cx: &mut EditorLspTestContext,
13903    mocked_response: lsp::SignatureHelp,
13904) -> impl Future<Output = ()> {
13905    let mut request =
13906        cx.handle_request::<lsp::request::SignatureHelpRequest, _, _>(move |_, _, _| {
13907            let mocked_response = mocked_response.clone();
13908            async move { Ok(Some(mocked_response)) }
13909        });
13910
13911    async move {
13912        request.next().await;
13913    }
13914}
13915
13916/// Handle completion request passing a marked string specifying where the completion
13917/// should be triggered from using '|' character, what range should be replaced, and what completions
13918/// should be returned using '<' and '>' to delimit the range
13919pub fn handle_completion_request(
13920    cx: &mut EditorLspTestContext,
13921    marked_string: &str,
13922    completions: Vec<&'static str>,
13923    counter: Arc<AtomicUsize>,
13924) -> impl Future<Output = ()> {
13925    let complete_from_marker: TextRangeMarker = '|'.into();
13926    let replace_range_marker: TextRangeMarker = ('<', '>').into();
13927    let (_, mut marked_ranges) = marked_text_ranges_by(
13928        marked_string,
13929        vec![complete_from_marker.clone(), replace_range_marker.clone()],
13930    );
13931
13932    let complete_from_position =
13933        cx.to_lsp(marked_ranges.remove(&complete_from_marker).unwrap()[0].start);
13934    let replace_range =
13935        cx.to_lsp_range(marked_ranges.remove(&replace_range_marker).unwrap()[0].clone());
13936
13937    let mut request = cx.handle_request::<lsp::request::Completion, _, _>(move |url, params, _| {
13938        let completions = completions.clone();
13939        counter.fetch_add(1, atomic::Ordering::Release);
13940        async move {
13941            assert_eq!(params.text_document_position.text_document.uri, url.clone());
13942            assert_eq!(
13943                params.text_document_position.position,
13944                complete_from_position
13945            );
13946            Ok(Some(lsp::CompletionResponse::Array(
13947                completions
13948                    .iter()
13949                    .map(|completion_text| lsp::CompletionItem {
13950                        label: completion_text.to_string(),
13951                        text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
13952                            range: replace_range,
13953                            new_text: completion_text.to_string(),
13954                        })),
13955                        ..Default::default()
13956                    })
13957                    .collect(),
13958            )))
13959        }
13960    });
13961
13962    async move {
13963        request.next().await;
13964    }
13965}
13966
13967fn handle_resolve_completion_request(
13968    cx: &mut EditorLspTestContext,
13969    edits: Option<Vec<(&'static str, &'static str)>>,
13970) -> impl Future<Output = ()> {
13971    let edits = edits.map(|edits| {
13972        edits
13973            .iter()
13974            .map(|(marked_string, new_text)| {
13975                let (_, marked_ranges) = marked_text_ranges(marked_string, false);
13976                let replace_range = cx.to_lsp_range(marked_ranges[0].clone());
13977                lsp::TextEdit::new(replace_range, new_text.to_string())
13978            })
13979            .collect::<Vec<_>>()
13980    });
13981
13982    let mut request =
13983        cx.handle_request::<lsp::request::ResolveCompletionItem, _, _>(move |_, _, _| {
13984            let edits = edits.clone();
13985            async move {
13986                Ok(lsp::CompletionItem {
13987                    additional_text_edits: edits,
13988                    ..Default::default()
13989                })
13990            }
13991        });
13992
13993    async move {
13994        request.next().await;
13995    }
13996}
13997
13998pub(crate) fn update_test_language_settings(
13999    cx: &mut TestAppContext,
14000    f: impl Fn(&mut AllLanguageSettingsContent),
14001) {
14002    cx.update(|cx| {
14003        SettingsStore::update_global(cx, |store, cx| {
14004            store.update_user_settings::<AllLanguageSettings>(cx, f);
14005        });
14006    });
14007}
14008
14009pub(crate) fn update_test_project_settings(
14010    cx: &mut TestAppContext,
14011    f: impl Fn(&mut ProjectSettings),
14012) {
14013    cx.update(|cx| {
14014        SettingsStore::update_global(cx, |store, cx| {
14015            store.update_user_settings::<ProjectSettings>(cx, f);
14016        });
14017    });
14018}
14019
14020pub(crate) fn init_test(cx: &mut TestAppContext, f: fn(&mut AllLanguageSettingsContent)) {
14021    cx.update(|cx| {
14022        assets::Assets.load_test_fonts(cx);
14023        let store = SettingsStore::test(cx);
14024        cx.set_global(store);
14025        theme::init(theme::LoadThemes::JustBase, cx);
14026        release_channel::init(SemanticVersion::default(), cx);
14027        client::init_settings(cx);
14028        language::init(cx);
14029        Project::init_settings(cx);
14030        workspace::init_settings(cx);
14031        crate::init(cx);
14032    });
14033
14034    update_test_language_settings(cx, f);
14035}
14036
14037#[track_caller]
14038fn assert_hunk_revert(
14039    not_reverted_text_with_selections: &str,
14040    expected_not_reverted_hunk_statuses: Vec<DiffHunkStatus>,
14041    expected_reverted_text_with_selections: &str,
14042    base_text: &str,
14043    cx: &mut EditorLspTestContext,
14044) {
14045    cx.set_state(not_reverted_text_with_selections);
14046    cx.set_diff_base(base_text);
14047    cx.executor().run_until_parked();
14048
14049    let reverted_hunk_statuses = cx.update_editor(|editor, cx| {
14050        let snapshot = editor.snapshot(cx);
14051        let reverted_hunk_statuses = snapshot
14052            .diff_map
14053            .diff_hunks_in_range(0..snapshot.buffer_snapshot.len(), &snapshot.buffer_snapshot)
14054            .map(|hunk| hunk_status(&hunk))
14055            .collect::<Vec<_>>();
14056
14057        editor.revert_selected_hunks(&RevertSelectedHunks, cx);
14058        reverted_hunk_statuses
14059    });
14060    cx.executor().run_until_parked();
14061    cx.assert_editor_state(expected_reverted_text_with_selections);
14062    assert_eq!(reverted_hunk_statuses, expected_not_reverted_hunk_statuses);
14063}