1use crate::{
   2    rpc::{CLEANUP_TIMEOUT, RECONNECT_TIMEOUT},
   3    tests::{TestClient, TestServer},
   4};
   5use call::{room, ActiveCall, ParticipantLocation, Room};
   6use client::{User, RECEIVE_TIMEOUT};
   7use collections::HashSet;
   8use editor::{
   9    test::editor_test_context::EditorTestContext, ConfirmCodeAction, ConfirmCompletion,
  10    ConfirmRename, Editor, ExcerptRange, MultiBuffer, Redo, Rename, ToOffset, ToggleCodeActions,
  11    Undo,
  12};
  13use fs::{repository::GitFileStatus, FakeFs, Fs as _, LineEnding, RemoveOptions};
  14use futures::StreamExt as _;
  15use gpui::{
  16    executor::Deterministic, geometry::vector::vec2f, test::EmptyView, AppContext, ModelHandle,
  17    TestAppContext, ViewHandle,
  18};
  19use indoc::indoc;
  20use language::{
  21    language_settings::{AllLanguageSettings, Formatter},
  22    tree_sitter_rust, Anchor, Diagnostic, DiagnosticEntry, FakeLspAdapter, Language,
  23    LanguageConfig, OffsetRangeExt, Point, Rope,
  24};
  25use live_kit_client::MacOSDisplay;
  26use lsp::LanguageServerId;
  27use project::{search::SearchQuery, DiagnosticSummary, HoverBlockKind, Project, ProjectPath};
  28use rand::prelude::*;
  29use serde_json::json;
  30use settings::SettingsStore;
  31use std::{
  32    cell::{Cell, RefCell},
  33    env, future, mem,
  34    path::{Path, PathBuf},
  35    rc::Rc,
  36    sync::{
  37        atomic::{AtomicBool, Ordering::SeqCst},
  38        Arc,
  39    },
  40};
  41use unindent::Unindent as _;
  42use workspace::{item::ItemHandle as _, shared_screen::SharedScreen, SplitDirection, Workspace};
  43
  44#[ctor::ctor]
  45fn init_logger() {
  46    if std::env::var("RUST_LOG").is_ok() {
  47        env_logger::init();
  48    }
  49}
  50
  51#[gpui::test(iterations = 10)]
  52async fn test_basic_calls(
  53    deterministic: Arc<Deterministic>,
  54    cx_a: &mut TestAppContext,
  55    cx_b: &mut TestAppContext,
  56    cx_b2: &mut TestAppContext,
  57    cx_c: &mut TestAppContext,
  58) {
  59    deterministic.forbid_parking();
  60    let mut server = TestServer::start(&deterministic).await;
  61
  62    let client_a = server.create_client(cx_a, "user_a").await;
  63    let client_b = server.create_client(cx_b, "user_b").await;
  64    let client_c = server.create_client(cx_c, "user_c").await;
  65    server
  66        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
  67        .await;
  68
  69    let active_call_a = cx_a.read(ActiveCall::global);
  70    let active_call_b = cx_b.read(ActiveCall::global);
  71    let active_call_c = cx_c.read(ActiveCall::global);
  72
  73    // Call user B from client A.
  74    active_call_a
  75        .update(cx_a, |call, cx| {
  76            call.invite(client_b.user_id().unwrap(), None, cx)
  77        })
  78        .await
  79        .unwrap();
  80    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
  81    deterministic.run_until_parked();
  82    assert_eq!(
  83        room_participants(&room_a, cx_a),
  84        RoomParticipants {
  85            remote: Default::default(),
  86            pending: vec!["user_b".to_string()]
  87        }
  88    );
  89
  90    // User B receives the call.
  91    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
  92    let call_b = incoming_call_b.next().await.unwrap().unwrap();
  93    assert_eq!(call_b.calling_user.github_login, "user_a");
  94
  95    // User B connects via another client and also receives a ring on the newly-connected client.
  96    let _client_b2 = server.create_client(cx_b2, "user_b").await;
  97    let active_call_b2 = cx_b2.read(ActiveCall::global);
  98    let mut incoming_call_b2 = active_call_b2.read_with(cx_b2, |call, _| call.incoming());
  99    deterministic.run_until_parked();
 100    let call_b2 = incoming_call_b2.next().await.unwrap().unwrap();
 101    assert_eq!(call_b2.calling_user.github_login, "user_a");
 102
 103    // User B joins the room using the first client.
 104    active_call_b
 105        .update(cx_b, |call, cx| call.accept_incoming(cx))
 106        .await
 107        .unwrap();
 108    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
 109    assert!(incoming_call_b.next().await.unwrap().is_none());
 110
 111    deterministic.run_until_parked();
 112    assert_eq!(
 113        room_participants(&room_a, cx_a),
 114        RoomParticipants {
 115            remote: vec!["user_b".to_string()],
 116            pending: Default::default()
 117        }
 118    );
 119    assert_eq!(
 120        room_participants(&room_b, cx_b),
 121        RoomParticipants {
 122            remote: vec!["user_a".to_string()],
 123            pending: Default::default()
 124        }
 125    );
 126
 127    // Call user C from client B.
 128    let mut incoming_call_c = active_call_c.read_with(cx_c, |call, _| call.incoming());
 129    active_call_b
 130        .update(cx_b, |call, cx| {
 131            call.invite(client_c.user_id().unwrap(), None, cx)
 132        })
 133        .await
 134        .unwrap();
 135
 136    deterministic.run_until_parked();
 137    assert_eq!(
 138        room_participants(&room_a, cx_a),
 139        RoomParticipants {
 140            remote: vec!["user_b".to_string()],
 141            pending: vec!["user_c".to_string()]
 142        }
 143    );
 144    assert_eq!(
 145        room_participants(&room_b, cx_b),
 146        RoomParticipants {
 147            remote: vec!["user_a".to_string()],
 148            pending: vec!["user_c".to_string()]
 149        }
 150    );
 151
 152    // User C receives the call, but declines it.
 153    let call_c = incoming_call_c.next().await.unwrap().unwrap();
 154    assert_eq!(call_c.calling_user.github_login, "user_b");
 155    active_call_c.update(cx_c, |call, _| call.decline_incoming().unwrap());
 156    assert!(incoming_call_c.next().await.unwrap().is_none());
 157
 158    deterministic.run_until_parked();
 159    assert_eq!(
 160        room_participants(&room_a, cx_a),
 161        RoomParticipants {
 162            remote: vec!["user_b".to_string()],
 163            pending: Default::default()
 164        }
 165    );
 166    assert_eq!(
 167        room_participants(&room_b, cx_b),
 168        RoomParticipants {
 169            remote: vec!["user_a".to_string()],
 170            pending: Default::default()
 171        }
 172    );
 173
 174    // Call user C again from user A.
 175    active_call_a
 176        .update(cx_a, |call, cx| {
 177            call.invite(client_c.user_id().unwrap(), None, cx)
 178        })
 179        .await
 180        .unwrap();
 181
 182    deterministic.run_until_parked();
 183    assert_eq!(
 184        room_participants(&room_a, cx_a),
 185        RoomParticipants {
 186            remote: vec!["user_b".to_string()],
 187            pending: vec!["user_c".to_string()]
 188        }
 189    );
 190    assert_eq!(
 191        room_participants(&room_b, cx_b),
 192        RoomParticipants {
 193            remote: vec!["user_a".to_string()],
 194            pending: vec!["user_c".to_string()]
 195        }
 196    );
 197
 198    // User C accepts the call.
 199    let call_c = incoming_call_c.next().await.unwrap().unwrap();
 200    assert_eq!(call_c.calling_user.github_login, "user_a");
 201    active_call_c
 202        .update(cx_c, |call, cx| call.accept_incoming(cx))
 203        .await
 204        .unwrap();
 205    assert!(incoming_call_c.next().await.unwrap().is_none());
 206    let room_c = active_call_c.read_with(cx_c, |call, _| call.room().unwrap().clone());
 207
 208    deterministic.run_until_parked();
 209    assert_eq!(
 210        room_participants(&room_a, cx_a),
 211        RoomParticipants {
 212            remote: vec!["user_b".to_string(), "user_c".to_string()],
 213            pending: Default::default()
 214        }
 215    );
 216    assert_eq!(
 217        room_participants(&room_b, cx_b),
 218        RoomParticipants {
 219            remote: vec!["user_a".to_string(), "user_c".to_string()],
 220            pending: Default::default()
 221        }
 222    );
 223    assert_eq!(
 224        room_participants(&room_c, cx_c),
 225        RoomParticipants {
 226            remote: vec!["user_a".to_string(), "user_b".to_string()],
 227            pending: Default::default()
 228        }
 229    );
 230
 231    // User A shares their screen
 232    let display = MacOSDisplay::new();
 233    let events_b = active_call_events(cx_b);
 234    let events_c = active_call_events(cx_c);
 235    active_call_a
 236        .update(cx_a, |call, cx| {
 237            call.room().unwrap().update(cx, |room, cx| {
 238                room.set_display_sources(vec![display.clone()]);
 239                room.share_screen(cx)
 240            })
 241        })
 242        .await
 243        .unwrap();
 244
 245    deterministic.run_until_parked();
 246
 247    // User B observes the remote screen sharing track.
 248    assert_eq!(events_b.borrow().len(), 1);
 249    let event_b = events_b.borrow().first().unwrap().clone();
 250    if let call::room::Event::RemoteVideoTracksChanged { participant_id } = event_b {
 251        assert_eq!(participant_id, client_a.peer_id().unwrap());
 252        room_b.read_with(cx_b, |room, _| {
 253            assert_eq!(
 254                room.remote_participants()[&client_a.user_id().unwrap()]
 255                    .tracks
 256                    .len(),
 257                1
 258            );
 259        });
 260    } else {
 261        panic!("unexpected event")
 262    }
 263
 264    // User C observes the remote screen sharing track.
 265    assert_eq!(events_c.borrow().len(), 1);
 266    let event_c = events_c.borrow().first().unwrap().clone();
 267    if let call::room::Event::RemoteVideoTracksChanged { participant_id } = event_c {
 268        assert_eq!(participant_id, client_a.peer_id().unwrap());
 269        room_c.read_with(cx_c, |room, _| {
 270            assert_eq!(
 271                room.remote_participants()[&client_a.user_id().unwrap()]
 272                    .tracks
 273                    .len(),
 274                1
 275            );
 276        });
 277    } else {
 278        panic!("unexpected event")
 279    }
 280
 281    // User A leaves the room.
 282    active_call_a
 283        .update(cx_a, |call, cx| {
 284            let hang_up = call.hang_up(cx);
 285            assert!(call.room().is_none());
 286            hang_up
 287        })
 288        .await
 289        .unwrap();
 290    deterministic.run_until_parked();
 291    assert_eq!(
 292        room_participants(&room_a, cx_a),
 293        RoomParticipants {
 294            remote: Default::default(),
 295            pending: Default::default()
 296        }
 297    );
 298    assert_eq!(
 299        room_participants(&room_b, cx_b),
 300        RoomParticipants {
 301            remote: vec!["user_c".to_string()],
 302            pending: Default::default()
 303        }
 304    );
 305    assert_eq!(
 306        room_participants(&room_c, cx_c),
 307        RoomParticipants {
 308            remote: vec!["user_b".to_string()],
 309            pending: Default::default()
 310        }
 311    );
 312
 313    // User B gets disconnected from the LiveKit server, which causes them
 314    // to automatically leave the room. User C leaves the room as well because
 315    // nobody else is in there.
 316    server
 317        .test_live_kit_server
 318        .disconnect_client(client_b.user_id().unwrap().to_string())
 319        .await;
 320    deterministic.run_until_parked();
 321    active_call_b.read_with(cx_b, |call, _| assert!(call.room().is_none()));
 322    active_call_c.read_with(cx_c, |call, _| assert!(call.room().is_none()));
 323    assert_eq!(
 324        room_participants(&room_a, cx_a),
 325        RoomParticipants {
 326            remote: Default::default(),
 327            pending: Default::default()
 328        }
 329    );
 330    assert_eq!(
 331        room_participants(&room_b, cx_b),
 332        RoomParticipants {
 333            remote: Default::default(),
 334            pending: Default::default()
 335        }
 336    );
 337    assert_eq!(
 338        room_participants(&room_c, cx_c),
 339        RoomParticipants {
 340            remote: Default::default(),
 341            pending: Default::default()
 342        }
 343    );
 344}
 345
 346#[gpui::test(iterations = 10)]
 347async fn test_calling_multiple_users_simultaneously(
 348    deterministic: Arc<Deterministic>,
 349    cx_a: &mut TestAppContext,
 350    cx_b: &mut TestAppContext,
 351    cx_c: &mut TestAppContext,
 352    cx_d: &mut TestAppContext,
 353) {
 354    deterministic.forbid_parking();
 355    let mut server = TestServer::start(&deterministic).await;
 356
 357    let client_a = server.create_client(cx_a, "user_a").await;
 358    let client_b = server.create_client(cx_b, "user_b").await;
 359    let client_c = server.create_client(cx_c, "user_c").await;
 360    let client_d = server.create_client(cx_d, "user_d").await;
 361    server
 362        .make_contacts(&mut [
 363            (&client_a, cx_a),
 364            (&client_b, cx_b),
 365            (&client_c, cx_c),
 366            (&client_d, cx_d),
 367        ])
 368        .await;
 369
 370    let active_call_a = cx_a.read(ActiveCall::global);
 371    let active_call_b = cx_b.read(ActiveCall::global);
 372    let active_call_c = cx_c.read(ActiveCall::global);
 373    let active_call_d = cx_d.read(ActiveCall::global);
 374
 375    // Simultaneously call user B and user C from client A.
 376    let b_invite = active_call_a.update(cx_a, |call, cx| {
 377        call.invite(client_b.user_id().unwrap(), None, cx)
 378    });
 379    let c_invite = active_call_a.update(cx_a, |call, cx| {
 380        call.invite(client_c.user_id().unwrap(), None, cx)
 381    });
 382    b_invite.await.unwrap();
 383    c_invite.await.unwrap();
 384
 385    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
 386    deterministic.run_until_parked();
 387    assert_eq!(
 388        room_participants(&room_a, cx_a),
 389        RoomParticipants {
 390            remote: Default::default(),
 391            pending: vec!["user_b".to_string(), "user_c".to_string()]
 392        }
 393    );
 394
 395    // Call client D from client A.
 396    active_call_a
 397        .update(cx_a, |call, cx| {
 398            call.invite(client_d.user_id().unwrap(), None, cx)
 399        })
 400        .await
 401        .unwrap();
 402    deterministic.run_until_parked();
 403    assert_eq!(
 404        room_participants(&room_a, cx_a),
 405        RoomParticipants {
 406            remote: Default::default(),
 407            pending: vec![
 408                "user_b".to_string(),
 409                "user_c".to_string(),
 410                "user_d".to_string()
 411            ]
 412        }
 413    );
 414
 415    // Accept the call on all clients simultaneously.
 416    let accept_b = active_call_b.update(cx_b, |call, cx| call.accept_incoming(cx));
 417    let accept_c = active_call_c.update(cx_c, |call, cx| call.accept_incoming(cx));
 418    let accept_d = active_call_d.update(cx_d, |call, cx| call.accept_incoming(cx));
 419    accept_b.await.unwrap();
 420    accept_c.await.unwrap();
 421    accept_d.await.unwrap();
 422
 423    deterministic.run_until_parked();
 424
 425    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
 426    let room_c = active_call_c.read_with(cx_c, |call, _| call.room().unwrap().clone());
 427    let room_d = active_call_d.read_with(cx_d, |call, _| call.room().unwrap().clone());
 428    assert_eq!(
 429        room_participants(&room_a, cx_a),
 430        RoomParticipants {
 431            remote: vec![
 432                "user_b".to_string(),
 433                "user_c".to_string(),
 434                "user_d".to_string(),
 435            ],
 436            pending: Default::default()
 437        }
 438    );
 439    assert_eq!(
 440        room_participants(&room_b, cx_b),
 441        RoomParticipants {
 442            remote: vec![
 443                "user_a".to_string(),
 444                "user_c".to_string(),
 445                "user_d".to_string(),
 446            ],
 447            pending: Default::default()
 448        }
 449    );
 450    assert_eq!(
 451        room_participants(&room_c, cx_c),
 452        RoomParticipants {
 453            remote: vec![
 454                "user_a".to_string(),
 455                "user_b".to_string(),
 456                "user_d".to_string(),
 457            ],
 458            pending: Default::default()
 459        }
 460    );
 461    assert_eq!(
 462        room_participants(&room_d, cx_d),
 463        RoomParticipants {
 464            remote: vec![
 465                "user_a".to_string(),
 466                "user_b".to_string(),
 467                "user_c".to_string(),
 468            ],
 469            pending: Default::default()
 470        }
 471    );
 472}
 473
 474#[gpui::test(iterations = 10)]
 475async fn test_room_uniqueness(
 476    deterministic: Arc<Deterministic>,
 477    cx_a: &mut TestAppContext,
 478    cx_a2: &mut TestAppContext,
 479    cx_b: &mut TestAppContext,
 480    cx_b2: &mut TestAppContext,
 481    cx_c: &mut TestAppContext,
 482) {
 483    deterministic.forbid_parking();
 484    let mut server = TestServer::start(&deterministic).await;
 485    let client_a = server.create_client(cx_a, "user_a").await;
 486    let _client_a2 = server.create_client(cx_a2, "user_a").await;
 487    let client_b = server.create_client(cx_b, "user_b").await;
 488    let _client_b2 = server.create_client(cx_b2, "user_b").await;
 489    let client_c = server.create_client(cx_c, "user_c").await;
 490    server
 491        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
 492        .await;
 493
 494    let active_call_a = cx_a.read(ActiveCall::global);
 495    let active_call_a2 = cx_a2.read(ActiveCall::global);
 496    let active_call_b = cx_b.read(ActiveCall::global);
 497    let active_call_b2 = cx_b2.read(ActiveCall::global);
 498    let active_call_c = cx_c.read(ActiveCall::global);
 499
 500    // Call user B from client A.
 501    active_call_a
 502        .update(cx_a, |call, cx| {
 503            call.invite(client_b.user_id().unwrap(), None, cx)
 504        })
 505        .await
 506        .unwrap();
 507
 508    // Ensure a new room can't be created given user A just created one.
 509    active_call_a2
 510        .update(cx_a2, |call, cx| {
 511            call.invite(client_c.user_id().unwrap(), None, cx)
 512        })
 513        .await
 514        .unwrap_err();
 515    active_call_a2.read_with(cx_a2, |call, _| assert!(call.room().is_none()));
 516
 517    // User B receives the call from user A.
 518    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
 519    let call_b1 = incoming_call_b.next().await.unwrap().unwrap();
 520    assert_eq!(call_b1.calling_user.github_login, "user_a");
 521
 522    // Ensure calling users A and B from client C fails.
 523    active_call_c
 524        .update(cx_c, |call, cx| {
 525            call.invite(client_a.user_id().unwrap(), None, cx)
 526        })
 527        .await
 528        .unwrap_err();
 529    active_call_c
 530        .update(cx_c, |call, cx| {
 531            call.invite(client_b.user_id().unwrap(), None, cx)
 532        })
 533        .await
 534        .unwrap_err();
 535
 536    // Ensure User B can't create a room while they still have an incoming call.
 537    active_call_b2
 538        .update(cx_b2, |call, cx| {
 539            call.invite(client_c.user_id().unwrap(), None, cx)
 540        })
 541        .await
 542        .unwrap_err();
 543    active_call_b2.read_with(cx_b2, |call, _| assert!(call.room().is_none()));
 544
 545    // User B joins the room and calling them after they've joined still fails.
 546    active_call_b
 547        .update(cx_b, |call, cx| call.accept_incoming(cx))
 548        .await
 549        .unwrap();
 550    active_call_c
 551        .update(cx_c, |call, cx| {
 552            call.invite(client_b.user_id().unwrap(), None, cx)
 553        })
 554        .await
 555        .unwrap_err();
 556
 557    // Ensure User B can't create a room while they belong to another room.
 558    active_call_b2
 559        .update(cx_b2, |call, cx| {
 560            call.invite(client_c.user_id().unwrap(), None, cx)
 561        })
 562        .await
 563        .unwrap_err();
 564    active_call_b2.read_with(cx_b2, |call, _| assert!(call.room().is_none()));
 565
 566    // Client C can successfully call client B after client B leaves the room.
 567    active_call_b
 568        .update(cx_b, |call, cx| call.hang_up(cx))
 569        .await
 570        .unwrap();
 571    deterministic.run_until_parked();
 572    active_call_c
 573        .update(cx_c, |call, cx| {
 574            call.invite(client_b.user_id().unwrap(), None, cx)
 575        })
 576        .await
 577        .unwrap();
 578    deterministic.run_until_parked();
 579    let call_b2 = incoming_call_b.next().await.unwrap().unwrap();
 580    assert_eq!(call_b2.calling_user.github_login, "user_c");
 581}
 582
 583#[gpui::test(iterations = 10)]
 584async fn test_client_disconnecting_from_room(
 585    deterministic: Arc<Deterministic>,
 586    cx_a: &mut TestAppContext,
 587    cx_b: &mut TestAppContext,
 588) {
 589    deterministic.forbid_parking();
 590    let mut server = TestServer::start(&deterministic).await;
 591    let client_a = server.create_client(cx_a, "user_a").await;
 592    let client_b = server.create_client(cx_b, "user_b").await;
 593    server
 594        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b)])
 595        .await;
 596
 597    let active_call_a = cx_a.read(ActiveCall::global);
 598    let active_call_b = cx_b.read(ActiveCall::global);
 599
 600    // Call user B from client A.
 601    active_call_a
 602        .update(cx_a, |call, cx| {
 603            call.invite(client_b.user_id().unwrap(), None, cx)
 604        })
 605        .await
 606        .unwrap();
 607    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
 608
 609    // User B receives the call and joins the room.
 610    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
 611    incoming_call_b.next().await.unwrap().unwrap();
 612    active_call_b
 613        .update(cx_b, |call, cx| call.accept_incoming(cx))
 614        .await
 615        .unwrap();
 616    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
 617    deterministic.run_until_parked();
 618    assert_eq!(
 619        room_participants(&room_a, cx_a),
 620        RoomParticipants {
 621            remote: vec!["user_b".to_string()],
 622            pending: Default::default()
 623        }
 624    );
 625    assert_eq!(
 626        room_participants(&room_b, cx_b),
 627        RoomParticipants {
 628            remote: vec!["user_a".to_string()],
 629            pending: Default::default()
 630        }
 631    );
 632
 633    // User A automatically reconnects to the room upon disconnection.
 634    server.disconnect_client(client_a.peer_id().unwrap());
 635    deterministic.advance_clock(RECEIVE_TIMEOUT);
 636    deterministic.run_until_parked();
 637    assert_eq!(
 638        room_participants(&room_a, cx_a),
 639        RoomParticipants {
 640            remote: vec!["user_b".to_string()],
 641            pending: Default::default()
 642        }
 643    );
 644    assert_eq!(
 645        room_participants(&room_b, cx_b),
 646        RoomParticipants {
 647            remote: vec!["user_a".to_string()],
 648            pending: Default::default()
 649        }
 650    );
 651
 652    // When user A disconnects, both client A and B clear their room on the active call.
 653    server.forbid_connections();
 654    server.disconnect_client(client_a.peer_id().unwrap());
 655    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
 656    active_call_a.read_with(cx_a, |call, _| assert!(call.room().is_none()));
 657    active_call_b.read_with(cx_b, |call, _| assert!(call.room().is_none()));
 658    assert_eq!(
 659        room_participants(&room_a, cx_a),
 660        RoomParticipants {
 661            remote: Default::default(),
 662            pending: Default::default()
 663        }
 664    );
 665    assert_eq!(
 666        room_participants(&room_b, cx_b),
 667        RoomParticipants {
 668            remote: Default::default(),
 669            pending: Default::default()
 670        }
 671    );
 672
 673    // Allow user A to reconnect to the server.
 674    server.allow_connections();
 675    deterministic.advance_clock(RECEIVE_TIMEOUT);
 676
 677    // Call user B again from client A.
 678    active_call_a
 679        .update(cx_a, |call, cx| {
 680            call.invite(client_b.user_id().unwrap(), None, cx)
 681        })
 682        .await
 683        .unwrap();
 684    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
 685
 686    // User B receives the call and joins the room.
 687    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
 688    incoming_call_b.next().await.unwrap().unwrap();
 689    active_call_b
 690        .update(cx_b, |call, cx| call.accept_incoming(cx))
 691        .await
 692        .unwrap();
 693    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
 694    deterministic.run_until_parked();
 695    assert_eq!(
 696        room_participants(&room_a, cx_a),
 697        RoomParticipants {
 698            remote: vec!["user_b".to_string()],
 699            pending: Default::default()
 700        }
 701    );
 702    assert_eq!(
 703        room_participants(&room_b, cx_b),
 704        RoomParticipants {
 705            remote: vec!["user_a".to_string()],
 706            pending: Default::default()
 707        }
 708    );
 709
 710    // User B gets disconnected from the LiveKit server, which causes it
 711    // to automatically leave the room.
 712    server
 713        .test_live_kit_server
 714        .disconnect_client(client_b.user_id().unwrap().to_string())
 715        .await;
 716    deterministic.run_until_parked();
 717    active_call_a.update(cx_a, |call, _| assert!(call.room().is_none()));
 718    active_call_b.update(cx_b, |call, _| assert!(call.room().is_none()));
 719    assert_eq!(
 720        room_participants(&room_a, cx_a),
 721        RoomParticipants {
 722            remote: Default::default(),
 723            pending: Default::default()
 724        }
 725    );
 726    assert_eq!(
 727        room_participants(&room_b, cx_b),
 728        RoomParticipants {
 729            remote: Default::default(),
 730            pending: Default::default()
 731        }
 732    );
 733}
 734
 735#[gpui::test(iterations = 10)]
 736async fn test_server_restarts(
 737    deterministic: Arc<Deterministic>,
 738    cx_a: &mut TestAppContext,
 739    cx_b: &mut TestAppContext,
 740    cx_c: &mut TestAppContext,
 741    cx_d: &mut TestAppContext,
 742) {
 743    deterministic.forbid_parking();
 744    let mut server = TestServer::start(&deterministic).await;
 745    let client_a = server.create_client(cx_a, "user_a").await;
 746    client_a
 747        .fs
 748        .insert_tree("/a", json!({ "a.txt": "a-contents" }))
 749        .await;
 750
 751    // Invite client B to collaborate on a project
 752    let (project_a, _) = client_a.build_local_project("/a", cx_a).await;
 753
 754    let client_b = server.create_client(cx_b, "user_b").await;
 755    let client_c = server.create_client(cx_c, "user_c").await;
 756    let client_d = server.create_client(cx_d, "user_d").await;
 757    server
 758        .make_contacts(&mut [
 759            (&client_a, cx_a),
 760            (&client_b, cx_b),
 761            (&client_c, cx_c),
 762            (&client_d, cx_d),
 763        ])
 764        .await;
 765
 766    let active_call_a = cx_a.read(ActiveCall::global);
 767    let active_call_b = cx_b.read(ActiveCall::global);
 768    let active_call_c = cx_c.read(ActiveCall::global);
 769    let active_call_d = cx_d.read(ActiveCall::global);
 770
 771    // User A calls users B, C, and D.
 772    active_call_a
 773        .update(cx_a, |call, cx| {
 774            call.invite(client_b.user_id().unwrap(), Some(project_a.clone()), cx)
 775        })
 776        .await
 777        .unwrap();
 778    active_call_a
 779        .update(cx_a, |call, cx| {
 780            call.invite(client_c.user_id().unwrap(), Some(project_a.clone()), cx)
 781        })
 782        .await
 783        .unwrap();
 784    active_call_a
 785        .update(cx_a, |call, cx| {
 786            call.invite(client_d.user_id().unwrap(), Some(project_a.clone()), cx)
 787        })
 788        .await
 789        .unwrap();
 790    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
 791
 792    // User B receives the call and joins the room.
 793    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
 794    assert!(incoming_call_b.next().await.unwrap().is_some());
 795    active_call_b
 796        .update(cx_b, |call, cx| call.accept_incoming(cx))
 797        .await
 798        .unwrap();
 799    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
 800
 801    // User C receives the call and joins the room.
 802    let mut incoming_call_c = active_call_c.read_with(cx_c, |call, _| call.incoming());
 803    assert!(incoming_call_c.next().await.unwrap().is_some());
 804    active_call_c
 805        .update(cx_c, |call, cx| call.accept_incoming(cx))
 806        .await
 807        .unwrap();
 808    let room_c = active_call_c.read_with(cx_c, |call, _| call.room().unwrap().clone());
 809
 810    // User D receives the call but doesn't join the room yet.
 811    let mut incoming_call_d = active_call_d.read_with(cx_d, |call, _| call.incoming());
 812    assert!(incoming_call_d.next().await.unwrap().is_some());
 813
 814    deterministic.run_until_parked();
 815    assert_eq!(
 816        room_participants(&room_a, cx_a),
 817        RoomParticipants {
 818            remote: vec!["user_b".to_string(), "user_c".to_string()],
 819            pending: vec!["user_d".to_string()]
 820        }
 821    );
 822    assert_eq!(
 823        room_participants(&room_b, cx_b),
 824        RoomParticipants {
 825            remote: vec!["user_a".to_string(), "user_c".to_string()],
 826            pending: vec!["user_d".to_string()]
 827        }
 828    );
 829    assert_eq!(
 830        room_participants(&room_c, cx_c),
 831        RoomParticipants {
 832            remote: vec!["user_a".to_string(), "user_b".to_string()],
 833            pending: vec!["user_d".to_string()]
 834        }
 835    );
 836
 837    // The server is torn down.
 838    server.reset().await;
 839
 840    // Users A and B reconnect to the call. User C has troubles reconnecting, so it leaves the room.
 841    client_c.override_establish_connection(|_, cx| cx.spawn(|_| future::pending()));
 842    deterministic.advance_clock(RECONNECT_TIMEOUT);
 843    assert_eq!(
 844        room_participants(&room_a, cx_a),
 845        RoomParticipants {
 846            remote: vec!["user_b".to_string(), "user_c".to_string()],
 847            pending: vec!["user_d".to_string()]
 848        }
 849    );
 850    assert_eq!(
 851        room_participants(&room_b, cx_b),
 852        RoomParticipants {
 853            remote: vec!["user_a".to_string(), "user_c".to_string()],
 854            pending: vec!["user_d".to_string()]
 855        }
 856    );
 857    assert_eq!(
 858        room_participants(&room_c, cx_c),
 859        RoomParticipants {
 860            remote: vec![],
 861            pending: vec![]
 862        }
 863    );
 864
 865    // User D is notified again of the incoming call and accepts it.
 866    assert!(incoming_call_d.next().await.unwrap().is_some());
 867    active_call_d
 868        .update(cx_d, |call, cx| call.accept_incoming(cx))
 869        .await
 870        .unwrap();
 871    deterministic.run_until_parked();
 872    let room_d = active_call_d.read_with(cx_d, |call, _| call.room().unwrap().clone());
 873    assert_eq!(
 874        room_participants(&room_a, cx_a),
 875        RoomParticipants {
 876            remote: vec![
 877                "user_b".to_string(),
 878                "user_c".to_string(),
 879                "user_d".to_string(),
 880            ],
 881            pending: vec![]
 882        }
 883    );
 884    assert_eq!(
 885        room_participants(&room_b, cx_b),
 886        RoomParticipants {
 887            remote: vec![
 888                "user_a".to_string(),
 889                "user_c".to_string(),
 890                "user_d".to_string(),
 891            ],
 892            pending: vec![]
 893        }
 894    );
 895    assert_eq!(
 896        room_participants(&room_c, cx_c),
 897        RoomParticipants {
 898            remote: vec![],
 899            pending: vec![]
 900        }
 901    );
 902    assert_eq!(
 903        room_participants(&room_d, cx_d),
 904        RoomParticipants {
 905            remote: vec![
 906                "user_a".to_string(),
 907                "user_b".to_string(),
 908                "user_c".to_string(),
 909            ],
 910            pending: vec![]
 911        }
 912    );
 913
 914    // The server finishes restarting, cleaning up stale connections.
 915    server.start().await.unwrap();
 916    deterministic.advance_clock(CLEANUP_TIMEOUT);
 917    assert_eq!(
 918        room_participants(&room_a, cx_a),
 919        RoomParticipants {
 920            remote: vec!["user_b".to_string(), "user_d".to_string()],
 921            pending: vec![]
 922        }
 923    );
 924    assert_eq!(
 925        room_participants(&room_b, cx_b),
 926        RoomParticipants {
 927            remote: vec!["user_a".to_string(), "user_d".to_string()],
 928            pending: vec![]
 929        }
 930    );
 931    assert_eq!(
 932        room_participants(&room_c, cx_c),
 933        RoomParticipants {
 934            remote: vec![],
 935            pending: vec![]
 936        }
 937    );
 938    assert_eq!(
 939        room_participants(&room_d, cx_d),
 940        RoomParticipants {
 941            remote: vec!["user_a".to_string(), "user_b".to_string()],
 942            pending: vec![]
 943        }
 944    );
 945
 946    // User D hangs up.
 947    active_call_d
 948        .update(cx_d, |call, cx| call.hang_up(cx))
 949        .await
 950        .unwrap();
 951    deterministic.run_until_parked();
 952    assert_eq!(
 953        room_participants(&room_a, cx_a),
 954        RoomParticipants {
 955            remote: vec!["user_b".to_string()],
 956            pending: vec![]
 957        }
 958    );
 959    assert_eq!(
 960        room_participants(&room_b, cx_b),
 961        RoomParticipants {
 962            remote: vec!["user_a".to_string()],
 963            pending: vec![]
 964        }
 965    );
 966    assert_eq!(
 967        room_participants(&room_c, cx_c),
 968        RoomParticipants {
 969            remote: vec![],
 970            pending: vec![]
 971        }
 972    );
 973    assert_eq!(
 974        room_participants(&room_d, cx_d),
 975        RoomParticipants {
 976            remote: vec![],
 977            pending: vec![]
 978        }
 979    );
 980
 981    // User B calls user D again.
 982    active_call_b
 983        .update(cx_b, |call, cx| {
 984            call.invite(client_d.user_id().unwrap(), None, cx)
 985        })
 986        .await
 987        .unwrap();
 988
 989    // User D receives the call but doesn't join the room yet.
 990    let mut incoming_call_d = active_call_d.read_with(cx_d, |call, _| call.incoming());
 991    assert!(incoming_call_d.next().await.unwrap().is_some());
 992    deterministic.run_until_parked();
 993    assert_eq!(
 994        room_participants(&room_a, cx_a),
 995        RoomParticipants {
 996            remote: vec!["user_b".to_string()],
 997            pending: vec!["user_d".to_string()]
 998        }
 999    );
1000    assert_eq!(
1001        room_participants(&room_b, cx_b),
1002        RoomParticipants {
1003            remote: vec!["user_a".to_string()],
1004            pending: vec!["user_d".to_string()]
1005        }
1006    );
1007
1008    // The server is torn down.
1009    server.reset().await;
1010
1011    // Users A and B have troubles reconnecting, so they leave the room.
1012    client_a.override_establish_connection(|_, cx| cx.spawn(|_| future::pending()));
1013    client_b.override_establish_connection(|_, cx| cx.spawn(|_| future::pending()));
1014    client_c.override_establish_connection(|_, cx| cx.spawn(|_| future::pending()));
1015    deterministic.advance_clock(RECONNECT_TIMEOUT);
1016    assert_eq!(
1017        room_participants(&room_a, cx_a),
1018        RoomParticipants {
1019            remote: vec![],
1020            pending: vec![]
1021        }
1022    );
1023    assert_eq!(
1024        room_participants(&room_b, cx_b),
1025        RoomParticipants {
1026            remote: vec![],
1027            pending: vec![]
1028        }
1029    );
1030
1031    // User D is notified again of the incoming call but doesn't accept it.
1032    assert!(incoming_call_d.next().await.unwrap().is_some());
1033
1034    // The server finishes restarting, cleaning up stale connections and canceling the
1035    // call to user D because the room has become empty.
1036    server.start().await.unwrap();
1037    deterministic.advance_clock(CLEANUP_TIMEOUT);
1038    assert!(incoming_call_d.next().await.unwrap().is_none());
1039}
1040
1041#[gpui::test(iterations = 10)]
1042async fn test_calls_on_multiple_connections(
1043    deterministic: Arc<Deterministic>,
1044    cx_a: &mut TestAppContext,
1045    cx_b1: &mut TestAppContext,
1046    cx_b2: &mut TestAppContext,
1047) {
1048    deterministic.forbid_parking();
1049    let mut server = TestServer::start(&deterministic).await;
1050    let client_a = server.create_client(cx_a, "user_a").await;
1051    let client_b1 = server.create_client(cx_b1, "user_b").await;
1052    let client_b2 = server.create_client(cx_b2, "user_b").await;
1053    server
1054        .make_contacts(&mut [(&client_a, cx_a), (&client_b1, cx_b1)])
1055        .await;
1056
1057    let active_call_a = cx_a.read(ActiveCall::global);
1058    let active_call_b1 = cx_b1.read(ActiveCall::global);
1059    let active_call_b2 = cx_b2.read(ActiveCall::global);
1060    let mut incoming_call_b1 = active_call_b1.read_with(cx_b1, |call, _| call.incoming());
1061    let mut incoming_call_b2 = active_call_b2.read_with(cx_b2, |call, _| call.incoming());
1062    assert!(incoming_call_b1.next().await.unwrap().is_none());
1063    assert!(incoming_call_b2.next().await.unwrap().is_none());
1064
1065    // Call user B from client A, ensuring both clients for user B ring.
1066    active_call_a
1067        .update(cx_a, |call, cx| {
1068            call.invite(client_b1.user_id().unwrap(), None, cx)
1069        })
1070        .await
1071        .unwrap();
1072    deterministic.run_until_parked();
1073    assert!(incoming_call_b1.next().await.unwrap().is_some());
1074    assert!(incoming_call_b2.next().await.unwrap().is_some());
1075
1076    // User B declines the call on one of the two connections, causing both connections
1077    // to stop ringing.
1078    active_call_b2.update(cx_b2, |call, _| call.decline_incoming().unwrap());
1079    deterministic.run_until_parked();
1080    assert!(incoming_call_b1.next().await.unwrap().is_none());
1081    assert!(incoming_call_b2.next().await.unwrap().is_none());
1082
1083    // Call user B again from client A.
1084    active_call_a
1085        .update(cx_a, |call, cx| {
1086            call.invite(client_b1.user_id().unwrap(), None, cx)
1087        })
1088        .await
1089        .unwrap();
1090    deterministic.run_until_parked();
1091    assert!(incoming_call_b1.next().await.unwrap().is_some());
1092    assert!(incoming_call_b2.next().await.unwrap().is_some());
1093
1094    // User B accepts the call on one of the two connections, causing both connections
1095    // to stop ringing.
1096    active_call_b2
1097        .update(cx_b2, |call, cx| call.accept_incoming(cx))
1098        .await
1099        .unwrap();
1100    deterministic.run_until_parked();
1101    assert!(incoming_call_b1.next().await.unwrap().is_none());
1102    assert!(incoming_call_b2.next().await.unwrap().is_none());
1103
1104    // User B disconnects the client that is not on the call. Everything should be fine.
1105    client_b1.disconnect(&cx_b1.to_async());
1106    deterministic.advance_clock(RECEIVE_TIMEOUT);
1107    client_b1
1108        .authenticate_and_connect(false, &cx_b1.to_async())
1109        .await
1110        .unwrap();
1111
1112    // User B hangs up, and user A calls them again.
1113    active_call_b2
1114        .update(cx_b2, |call, cx| call.hang_up(cx))
1115        .await
1116        .unwrap();
1117    deterministic.run_until_parked();
1118    active_call_a
1119        .update(cx_a, |call, cx| {
1120            call.invite(client_b1.user_id().unwrap(), None, cx)
1121        })
1122        .await
1123        .unwrap();
1124    deterministic.run_until_parked();
1125    assert!(incoming_call_b1.next().await.unwrap().is_some());
1126    assert!(incoming_call_b2.next().await.unwrap().is_some());
1127
1128    // User A cancels the call, causing both connections to stop ringing.
1129    active_call_a
1130        .update(cx_a, |call, cx| {
1131            call.cancel_invite(client_b1.user_id().unwrap(), cx)
1132        })
1133        .await
1134        .unwrap();
1135    deterministic.run_until_parked();
1136    assert!(incoming_call_b1.next().await.unwrap().is_none());
1137    assert!(incoming_call_b2.next().await.unwrap().is_none());
1138
1139    // User A calls user B again.
1140    active_call_a
1141        .update(cx_a, |call, cx| {
1142            call.invite(client_b1.user_id().unwrap(), None, cx)
1143        })
1144        .await
1145        .unwrap();
1146    deterministic.run_until_parked();
1147    assert!(incoming_call_b1.next().await.unwrap().is_some());
1148    assert!(incoming_call_b2.next().await.unwrap().is_some());
1149
1150    // User A hangs up, causing both connections to stop ringing.
1151    active_call_a
1152        .update(cx_a, |call, cx| call.hang_up(cx))
1153        .await
1154        .unwrap();
1155    deterministic.run_until_parked();
1156    assert!(incoming_call_b1.next().await.unwrap().is_none());
1157    assert!(incoming_call_b2.next().await.unwrap().is_none());
1158
1159    // User A calls user B again.
1160    active_call_a
1161        .update(cx_a, |call, cx| {
1162            call.invite(client_b1.user_id().unwrap(), None, cx)
1163        })
1164        .await
1165        .unwrap();
1166    deterministic.run_until_parked();
1167    assert!(incoming_call_b1.next().await.unwrap().is_some());
1168    assert!(incoming_call_b2.next().await.unwrap().is_some());
1169
1170    // User A disconnects, causing both connections to stop ringing.
1171    server.forbid_connections();
1172    server.disconnect_client(client_a.peer_id().unwrap());
1173    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
1174    assert!(incoming_call_b1.next().await.unwrap().is_none());
1175    assert!(incoming_call_b2.next().await.unwrap().is_none());
1176
1177    // User A reconnects automatically, then calls user B again.
1178    server.allow_connections();
1179    deterministic.advance_clock(RECEIVE_TIMEOUT);
1180    active_call_a
1181        .update(cx_a, |call, cx| {
1182            call.invite(client_b1.user_id().unwrap(), None, cx)
1183        })
1184        .await
1185        .unwrap();
1186    deterministic.run_until_parked();
1187    assert!(incoming_call_b1.next().await.unwrap().is_some());
1188    assert!(incoming_call_b2.next().await.unwrap().is_some());
1189
1190    // User B disconnects all clients, causing user A to no longer see a pending call for them.
1191    server.forbid_connections();
1192    server.disconnect_client(client_b1.peer_id().unwrap());
1193    server.disconnect_client(client_b2.peer_id().unwrap());
1194    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
1195    active_call_a.read_with(cx_a, |call, _| assert!(call.room().is_none()));
1196}
1197
1198#[gpui::test(iterations = 10)]
1199async fn test_share_project(
1200    deterministic: Arc<Deterministic>,
1201    cx_a: &mut TestAppContext,
1202    cx_b: &mut TestAppContext,
1203    cx_c: &mut TestAppContext,
1204) {
1205    deterministic.forbid_parking();
1206    let (window_b, _) = cx_b.add_window(|_| EmptyView);
1207    let mut server = TestServer::start(&deterministic).await;
1208    let client_a = server.create_client(cx_a, "user_a").await;
1209    let client_b = server.create_client(cx_b, "user_b").await;
1210    let client_c = server.create_client(cx_c, "user_c").await;
1211    server
1212        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
1213        .await;
1214    let active_call_a = cx_a.read(ActiveCall::global);
1215    let active_call_b = cx_b.read(ActiveCall::global);
1216    let active_call_c = cx_c.read(ActiveCall::global);
1217
1218    client_a
1219        .fs
1220        .insert_tree(
1221            "/a",
1222            json!({
1223                ".gitignore": "ignored-dir",
1224                "a.txt": "a-contents",
1225                "b.txt": "b-contents",
1226                "ignored-dir": {
1227                    "c.txt": "",
1228                    "d.txt": "",
1229                }
1230            }),
1231        )
1232        .await;
1233
1234    // Invite client B to collaborate on a project
1235    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
1236    active_call_a
1237        .update(cx_a, |call, cx| {
1238            call.invite(client_b.user_id().unwrap(), Some(project_a.clone()), cx)
1239        })
1240        .await
1241        .unwrap();
1242
1243    // Join that project as client B
1244    let incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
1245    deterministic.run_until_parked();
1246    let call = incoming_call_b.borrow().clone().unwrap();
1247    assert_eq!(call.calling_user.github_login, "user_a");
1248    let initial_project = call.initial_project.unwrap();
1249    active_call_b
1250        .update(cx_b, |call, cx| call.accept_incoming(cx))
1251        .await
1252        .unwrap();
1253    let client_b_peer_id = client_b.peer_id().unwrap();
1254    let project_b = client_b
1255        .build_remote_project(initial_project.id, cx_b)
1256        .await;
1257    let replica_id_b = project_b.read_with(cx_b, |project, _| project.replica_id());
1258
1259    deterministic.run_until_parked();
1260    project_a.read_with(cx_a, |project, _| {
1261        let client_b_collaborator = project.collaborators().get(&client_b_peer_id).unwrap();
1262        assert_eq!(client_b_collaborator.replica_id, replica_id_b);
1263    });
1264    project_b.read_with(cx_b, |project, cx| {
1265        let worktree = project.worktrees(cx).next().unwrap().read(cx);
1266        assert_eq!(
1267            worktree.paths().map(AsRef::as_ref).collect::<Vec<_>>(),
1268            [
1269                Path::new(".gitignore"),
1270                Path::new("a.txt"),
1271                Path::new("b.txt"),
1272                Path::new("ignored-dir"),
1273                Path::new("ignored-dir/c.txt"),
1274                Path::new("ignored-dir/d.txt"),
1275            ]
1276        );
1277    });
1278
1279    // Open the same file as client B and client A.
1280    let buffer_b = project_b
1281        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "b.txt"), cx))
1282        .await
1283        .unwrap();
1284    buffer_b.read_with(cx_b, |buf, _| assert_eq!(buf.text(), "b-contents"));
1285    project_a.read_with(cx_a, |project, cx| {
1286        assert!(project.has_open_buffer((worktree_id, "b.txt"), cx))
1287    });
1288    let buffer_a = project_a
1289        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "b.txt"), cx))
1290        .await
1291        .unwrap();
1292
1293    let editor_b = cx_b.add_view(window_b, |cx| Editor::for_buffer(buffer_b, None, cx));
1294
1295    // Client A sees client B's selection
1296    deterministic.run_until_parked();
1297    buffer_a.read_with(cx_a, |buffer, _| {
1298        buffer
1299            .snapshot()
1300            .remote_selections_in_range(Anchor::MIN..Anchor::MAX)
1301            .count()
1302            == 1
1303    });
1304
1305    // Edit the buffer as client B and see that edit as client A.
1306    editor_b.update(cx_b, |editor, cx| editor.handle_input("ok, ", cx));
1307    deterministic.run_until_parked();
1308    buffer_a.read_with(cx_a, |buffer, _| {
1309        assert_eq!(buffer.text(), "ok, b-contents")
1310    });
1311
1312    // Client B can invite client C on a project shared by client A.
1313    active_call_b
1314        .update(cx_b, |call, cx| {
1315            call.invite(client_c.user_id().unwrap(), Some(project_b.clone()), cx)
1316        })
1317        .await
1318        .unwrap();
1319
1320    let incoming_call_c = active_call_c.read_with(cx_c, |call, _| call.incoming());
1321    deterministic.run_until_parked();
1322    let call = incoming_call_c.borrow().clone().unwrap();
1323    assert_eq!(call.calling_user.github_login, "user_b");
1324    let initial_project = call.initial_project.unwrap();
1325    active_call_c
1326        .update(cx_c, |call, cx| call.accept_incoming(cx))
1327        .await
1328        .unwrap();
1329    let _project_c = client_c
1330        .build_remote_project(initial_project.id, cx_c)
1331        .await;
1332
1333    // Client B closes the editor, and client A sees client B's selections removed.
1334    cx_b.update(move |_| drop(editor_b));
1335    deterministic.run_until_parked();
1336    buffer_a.read_with(cx_a, |buffer, _| {
1337        buffer
1338            .snapshot()
1339            .remote_selections_in_range(Anchor::MIN..Anchor::MAX)
1340            .count()
1341            == 0
1342    });
1343}
1344
1345#[gpui::test(iterations = 10)]
1346async fn test_unshare_project(
1347    deterministic: Arc<Deterministic>,
1348    cx_a: &mut TestAppContext,
1349    cx_b: &mut TestAppContext,
1350    cx_c: &mut TestAppContext,
1351) {
1352    deterministic.forbid_parking();
1353    let mut server = TestServer::start(&deterministic).await;
1354    let client_a = server.create_client(cx_a, "user_a").await;
1355    let client_b = server.create_client(cx_b, "user_b").await;
1356    let client_c = server.create_client(cx_c, "user_c").await;
1357    server
1358        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
1359        .await;
1360
1361    let active_call_a = cx_a.read(ActiveCall::global);
1362    let active_call_b = cx_b.read(ActiveCall::global);
1363
1364    client_a
1365        .fs
1366        .insert_tree(
1367            "/a",
1368            json!({
1369                "a.txt": "a-contents",
1370                "b.txt": "b-contents",
1371            }),
1372        )
1373        .await;
1374
1375    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
1376    let project_id = active_call_a
1377        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
1378        .await
1379        .unwrap();
1380    let worktree_a = project_a.read_with(cx_a, |project, cx| project.worktrees(cx).next().unwrap());
1381    let project_b = client_b.build_remote_project(project_id, cx_b).await;
1382    deterministic.run_until_parked();
1383    assert!(worktree_a.read_with(cx_a, |tree, _| tree.as_local().unwrap().is_shared()));
1384
1385    project_b
1386        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
1387        .await
1388        .unwrap();
1389
1390    // When client B leaves the room, the project becomes read-only.
1391    active_call_b
1392        .update(cx_b, |call, cx| call.hang_up(cx))
1393        .await
1394        .unwrap();
1395    deterministic.run_until_parked();
1396    assert!(project_b.read_with(cx_b, |project, _| project.is_read_only()));
1397
1398    // Client C opens the project.
1399    let project_c = client_c.build_remote_project(project_id, cx_c).await;
1400
1401    // When client A unshares the project, client C's project becomes read-only.
1402    project_a
1403        .update(cx_a, |project, cx| project.unshare(cx))
1404        .unwrap();
1405    deterministic.run_until_parked();
1406    assert!(worktree_a.read_with(cx_a, |tree, _| !tree.as_local().unwrap().is_shared()));
1407    assert!(project_c.read_with(cx_c, |project, _| project.is_read_only()));
1408
1409    // Client C can open the project again after client A re-shares.
1410    let project_id = active_call_a
1411        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
1412        .await
1413        .unwrap();
1414    let project_c2 = client_c.build_remote_project(project_id, cx_c).await;
1415    deterministic.run_until_parked();
1416    assert!(worktree_a.read_with(cx_a, |tree, _| tree.as_local().unwrap().is_shared()));
1417    project_c2
1418        .update(cx_c, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
1419        .await
1420        .unwrap();
1421
1422    // When client A (the host) leaves the room, the project gets unshared and guests are notified.
1423    active_call_a
1424        .update(cx_a, |call, cx| call.hang_up(cx))
1425        .await
1426        .unwrap();
1427    deterministic.run_until_parked();
1428    project_a.read_with(cx_a, |project, _| assert!(!project.is_shared()));
1429    project_c2.read_with(cx_c, |project, _| {
1430        assert!(project.is_read_only());
1431        assert!(project.collaborators().is_empty());
1432    });
1433}
1434
1435#[gpui::test(iterations = 10)]
1436async fn test_host_disconnect(
1437    deterministic: Arc<Deterministic>,
1438    cx_a: &mut TestAppContext,
1439    cx_b: &mut TestAppContext,
1440    cx_c: &mut TestAppContext,
1441) {
1442    deterministic.forbid_parking();
1443    let mut server = TestServer::start(&deterministic).await;
1444    let client_a = server.create_client(cx_a, "user_a").await;
1445    let client_b = server.create_client(cx_b, "user_b").await;
1446    let client_c = server.create_client(cx_c, "user_c").await;
1447    server
1448        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
1449        .await;
1450
1451    cx_b.update(editor::init);
1452
1453    client_a
1454        .fs
1455        .insert_tree(
1456            "/a",
1457            json!({
1458                "a.txt": "a-contents",
1459                "b.txt": "b-contents",
1460            }),
1461        )
1462        .await;
1463
1464    let active_call_a = cx_a.read(ActiveCall::global);
1465    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
1466    let worktree_a = project_a.read_with(cx_a, |project, cx| project.worktrees(cx).next().unwrap());
1467    let project_id = active_call_a
1468        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
1469        .await
1470        .unwrap();
1471
1472    let project_b = client_b.build_remote_project(project_id, cx_b).await;
1473    deterministic.run_until_parked();
1474    assert!(worktree_a.read_with(cx_a, |tree, _| tree.as_local().unwrap().is_shared()));
1475
1476    let (window_id_b, workspace_b) =
1477        cx_b.add_window(|cx| Workspace::test_new(project_b.clone(), cx));
1478    let editor_b = workspace_b
1479        .update(cx_b, |workspace, cx| {
1480            workspace.open_path((worktree_id, "b.txt"), None, true, cx)
1481        })
1482        .await
1483        .unwrap()
1484        .downcast::<Editor>()
1485        .unwrap();
1486    assert!(cx_b
1487        .read_window(window_id_b, |cx| editor_b.is_focused(cx))
1488        .unwrap());
1489    editor_b.update(cx_b, |editor, cx| editor.insert("X", cx));
1490    assert!(cx_b.is_window_edited(workspace_b.window_id()));
1491
1492    // Drop client A's connection. Collaborators should disappear and the project should not be shown as shared.
1493    server.forbid_connections();
1494    server.disconnect_client(client_a.peer_id().unwrap());
1495    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
1496    project_a.read_with(cx_a, |project, _| project.collaborators().is_empty());
1497    project_a.read_with(cx_a, |project, _| assert!(!project.is_shared()));
1498    project_b.read_with(cx_b, |project, _| project.is_read_only());
1499    assert!(worktree_a.read_with(cx_a, |tree, _| !tree.as_local().unwrap().is_shared()));
1500
1501    // Ensure client B's edited state is reset and that the whole window is blurred.
1502    cx_b.read_window(window_id_b, |cx| {
1503        assert_eq!(cx.focused_view_id(), None);
1504    });
1505    assert!(!cx_b.is_window_edited(workspace_b.window_id()));
1506
1507    // Ensure client B is not prompted to save edits when closing window after disconnecting.
1508    let can_close = workspace_b
1509        .update(cx_b, |workspace, cx| workspace.prepare_to_close(true, cx))
1510        .await
1511        .unwrap();
1512    assert!(can_close);
1513
1514    // Allow client A to reconnect to the server.
1515    server.allow_connections();
1516    deterministic.advance_clock(RECEIVE_TIMEOUT);
1517
1518    // Client B calls client A again after they reconnected.
1519    let active_call_b = cx_b.read(ActiveCall::global);
1520    active_call_b
1521        .update(cx_b, |call, cx| {
1522            call.invite(client_a.user_id().unwrap(), None, cx)
1523        })
1524        .await
1525        .unwrap();
1526    deterministic.run_until_parked();
1527    active_call_a
1528        .update(cx_a, |call, cx| call.accept_incoming(cx))
1529        .await
1530        .unwrap();
1531
1532    active_call_a
1533        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
1534        .await
1535        .unwrap();
1536
1537    // Drop client A's connection again. We should still unshare it successfully.
1538    server.forbid_connections();
1539    server.disconnect_client(client_a.peer_id().unwrap());
1540    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
1541    project_a.read_with(cx_a, |project, _| assert!(!project.is_shared()));
1542}
1543
1544#[gpui::test(iterations = 10)]
1545async fn test_project_reconnect(
1546    deterministic: Arc<Deterministic>,
1547    cx_a: &mut TestAppContext,
1548    cx_b: &mut TestAppContext,
1549) {
1550    deterministic.forbid_parking();
1551    let mut server = TestServer::start(&deterministic).await;
1552    let client_a = server.create_client(cx_a, "user_a").await;
1553    let client_b = server.create_client(cx_b, "user_b").await;
1554    server
1555        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
1556        .await;
1557
1558    cx_b.update(editor::init);
1559
1560    client_a
1561        .fs
1562        .insert_tree(
1563            "/root-1",
1564            json!({
1565                "dir1": {
1566                    "a.txt": "a",
1567                    "b.txt": "b",
1568                    "subdir1": {
1569                        "c.txt": "c",
1570                        "d.txt": "d",
1571                        "e.txt": "e",
1572                    }
1573                },
1574                "dir2": {
1575                    "v.txt": "v",
1576                },
1577                "dir3": {
1578                    "w.txt": "w",
1579                    "x.txt": "x",
1580                    "y.txt": "y",
1581                },
1582                "dir4": {
1583                    "z.txt": "z",
1584                },
1585            }),
1586        )
1587        .await;
1588    client_a
1589        .fs
1590        .insert_tree(
1591            "/root-2",
1592            json!({
1593                "2.txt": "2",
1594            }),
1595        )
1596        .await;
1597    client_a
1598        .fs
1599        .insert_tree(
1600            "/root-3",
1601            json!({
1602                "3.txt": "3",
1603            }),
1604        )
1605        .await;
1606
1607    let active_call_a = cx_a.read(ActiveCall::global);
1608    let (project_a1, _) = client_a.build_local_project("/root-1/dir1", cx_a).await;
1609    let (project_a2, _) = client_a.build_local_project("/root-2", cx_a).await;
1610    let (project_a3, _) = client_a.build_local_project("/root-3", cx_a).await;
1611    let worktree_a1 =
1612        project_a1.read_with(cx_a, |project, cx| project.worktrees(cx).next().unwrap());
1613    let project1_id = active_call_a
1614        .update(cx_a, |call, cx| call.share_project(project_a1.clone(), cx))
1615        .await
1616        .unwrap();
1617    let project2_id = active_call_a
1618        .update(cx_a, |call, cx| call.share_project(project_a2.clone(), cx))
1619        .await
1620        .unwrap();
1621    let project3_id = active_call_a
1622        .update(cx_a, |call, cx| call.share_project(project_a3.clone(), cx))
1623        .await
1624        .unwrap();
1625
1626    let project_b1 = client_b.build_remote_project(project1_id, cx_b).await;
1627    let project_b2 = client_b.build_remote_project(project2_id, cx_b).await;
1628    let project_b3 = client_b.build_remote_project(project3_id, cx_b).await;
1629    deterministic.run_until_parked();
1630
1631    let worktree1_id = worktree_a1.read_with(cx_a, |worktree, _| {
1632        assert!(worktree.as_local().unwrap().is_shared());
1633        worktree.id()
1634    });
1635    let (worktree_a2, _) = project_a1
1636        .update(cx_a, |p, cx| {
1637            p.find_or_create_local_worktree("/root-1/dir2", true, cx)
1638        })
1639        .await
1640        .unwrap();
1641    deterministic.run_until_parked();
1642    let worktree2_id = worktree_a2.read_with(cx_a, |tree, _| {
1643        assert!(tree.as_local().unwrap().is_shared());
1644        tree.id()
1645    });
1646    deterministic.run_until_parked();
1647    project_b1.read_with(cx_b, |project, cx| {
1648        assert!(project.worktree_for_id(worktree2_id, cx).is_some())
1649    });
1650
1651    let buffer_a1 = project_a1
1652        .update(cx_a, |p, cx| p.open_buffer((worktree1_id, "a.txt"), cx))
1653        .await
1654        .unwrap();
1655    let buffer_b1 = project_b1
1656        .update(cx_b, |p, cx| p.open_buffer((worktree1_id, "a.txt"), cx))
1657        .await
1658        .unwrap();
1659
1660    // Drop client A's connection.
1661    server.forbid_connections();
1662    server.disconnect_client(client_a.peer_id().unwrap());
1663    deterministic.advance_clock(RECEIVE_TIMEOUT);
1664    project_a1.read_with(cx_a, |project, _| {
1665        assert!(project.is_shared());
1666        assert_eq!(project.collaborators().len(), 1);
1667    });
1668    project_b1.read_with(cx_b, |project, _| {
1669        assert!(!project.is_read_only());
1670        assert_eq!(project.collaborators().len(), 1);
1671    });
1672    worktree_a1.read_with(cx_a, |tree, _| {
1673        assert!(tree.as_local().unwrap().is_shared())
1674    });
1675
1676    // While client A is disconnected, add and remove files from client A's project.
1677    client_a
1678        .fs
1679        .insert_tree(
1680            "/root-1/dir1/subdir2",
1681            json!({
1682                "f.txt": "f-contents",
1683                "g.txt": "g-contents",
1684                "h.txt": "h-contents",
1685                "i.txt": "i-contents",
1686            }),
1687        )
1688        .await;
1689    client_a
1690        .fs
1691        .remove_dir(
1692            "/root-1/dir1/subdir1".as_ref(),
1693            RemoveOptions {
1694                recursive: true,
1695                ..Default::default()
1696            },
1697        )
1698        .await
1699        .unwrap();
1700
1701    // While client A is disconnected, add and remove worktrees from client A's project.
1702    project_a1.update(cx_a, |project, cx| {
1703        project.remove_worktree(worktree2_id, cx)
1704    });
1705    let (worktree_a3, _) = project_a1
1706        .update(cx_a, |p, cx| {
1707            p.find_or_create_local_worktree("/root-1/dir3", true, cx)
1708        })
1709        .await
1710        .unwrap();
1711    worktree_a3
1712        .read_with(cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1713        .await;
1714    let worktree3_id = worktree_a3.read_with(cx_a, |tree, _| {
1715        assert!(!tree.as_local().unwrap().is_shared());
1716        tree.id()
1717    });
1718    deterministic.run_until_parked();
1719
1720    // While client A is disconnected, close project 2
1721    cx_a.update(|_| drop(project_a2));
1722
1723    // While client A is disconnected, mutate a buffer on both the host and the guest.
1724    buffer_a1.update(cx_a, |buf, cx| buf.edit([(0..0, "W")], None, cx));
1725    buffer_b1.update(cx_b, |buf, cx| buf.edit([(1..1, "Z")], None, cx));
1726    deterministic.run_until_parked();
1727
1728    // Client A reconnects. Their project is re-shared, and client B re-joins it.
1729    server.allow_connections();
1730    client_a
1731        .authenticate_and_connect(false, &cx_a.to_async())
1732        .await
1733        .unwrap();
1734    deterministic.run_until_parked();
1735    project_a1.read_with(cx_a, |project, cx| {
1736        assert!(project.is_shared());
1737        assert!(worktree_a1.read(cx).as_local().unwrap().is_shared());
1738        assert_eq!(
1739            worktree_a1
1740                .read(cx)
1741                .snapshot()
1742                .paths()
1743                .map(|p| p.to_str().unwrap())
1744                .collect::<Vec<_>>(),
1745            vec![
1746                "a.txt",
1747                "b.txt",
1748                "subdir2",
1749                "subdir2/f.txt",
1750                "subdir2/g.txt",
1751                "subdir2/h.txt",
1752                "subdir2/i.txt"
1753            ]
1754        );
1755        assert!(worktree_a3.read(cx).as_local().unwrap().is_shared());
1756        assert_eq!(
1757            worktree_a3
1758                .read(cx)
1759                .snapshot()
1760                .paths()
1761                .map(|p| p.to_str().unwrap())
1762                .collect::<Vec<_>>(),
1763            vec!["w.txt", "x.txt", "y.txt"]
1764        );
1765    });
1766    project_b1.read_with(cx_b, |project, cx| {
1767        assert!(!project.is_read_only());
1768        assert_eq!(
1769            project
1770                .worktree_for_id(worktree1_id, cx)
1771                .unwrap()
1772                .read(cx)
1773                .snapshot()
1774                .paths()
1775                .map(|p| p.to_str().unwrap())
1776                .collect::<Vec<_>>(),
1777            vec![
1778                "a.txt",
1779                "b.txt",
1780                "subdir2",
1781                "subdir2/f.txt",
1782                "subdir2/g.txt",
1783                "subdir2/h.txt",
1784                "subdir2/i.txt"
1785            ]
1786        );
1787        assert!(project.worktree_for_id(worktree2_id, cx).is_none());
1788        assert_eq!(
1789            project
1790                .worktree_for_id(worktree3_id, cx)
1791                .unwrap()
1792                .read(cx)
1793                .snapshot()
1794                .paths()
1795                .map(|p| p.to_str().unwrap())
1796                .collect::<Vec<_>>(),
1797            vec!["w.txt", "x.txt", "y.txt"]
1798        );
1799    });
1800    project_b2.read_with(cx_b, |project, _| assert!(project.is_read_only()));
1801    project_b3.read_with(cx_b, |project, _| assert!(!project.is_read_only()));
1802    buffer_a1.read_with(cx_a, |buffer, _| assert_eq!(buffer.text(), "WaZ"));
1803    buffer_b1.read_with(cx_b, |buffer, _| assert_eq!(buffer.text(), "WaZ"));
1804
1805    // Drop client B's connection.
1806    server.forbid_connections();
1807    server.disconnect_client(client_b.peer_id().unwrap());
1808    deterministic.advance_clock(RECEIVE_TIMEOUT);
1809
1810    // While client B is disconnected, add and remove files from client A's project
1811    client_a
1812        .fs
1813        .insert_file("/root-1/dir1/subdir2/j.txt", "j-contents".into())
1814        .await;
1815    client_a
1816        .fs
1817        .remove_file("/root-1/dir1/subdir2/i.txt".as_ref(), Default::default())
1818        .await
1819        .unwrap();
1820
1821    // While client B is disconnected, add and remove worktrees from client A's project.
1822    let (worktree_a4, _) = project_a1
1823        .update(cx_a, |p, cx| {
1824            p.find_or_create_local_worktree("/root-1/dir4", true, cx)
1825        })
1826        .await
1827        .unwrap();
1828    deterministic.run_until_parked();
1829    let worktree4_id = worktree_a4.read_with(cx_a, |tree, _| {
1830        assert!(tree.as_local().unwrap().is_shared());
1831        tree.id()
1832    });
1833    project_a1.update(cx_a, |project, cx| {
1834        project.remove_worktree(worktree3_id, cx)
1835    });
1836    deterministic.run_until_parked();
1837
1838    // While client B is disconnected, mutate a buffer on both the host and the guest.
1839    buffer_a1.update(cx_a, |buf, cx| buf.edit([(1..1, "X")], None, cx));
1840    buffer_b1.update(cx_b, |buf, cx| buf.edit([(2..2, "Y")], None, cx));
1841    deterministic.run_until_parked();
1842
1843    // While disconnected, close project 3
1844    cx_a.update(|_| drop(project_a3));
1845
1846    // Client B reconnects. They re-join the room and the remaining shared project.
1847    server.allow_connections();
1848    client_b
1849        .authenticate_and_connect(false, &cx_b.to_async())
1850        .await
1851        .unwrap();
1852    deterministic.run_until_parked();
1853    project_b1.read_with(cx_b, |project, cx| {
1854        assert!(!project.is_read_only());
1855        assert_eq!(
1856            project
1857                .worktree_for_id(worktree1_id, cx)
1858                .unwrap()
1859                .read(cx)
1860                .snapshot()
1861                .paths()
1862                .map(|p| p.to_str().unwrap())
1863                .collect::<Vec<_>>(),
1864            vec![
1865                "a.txt",
1866                "b.txt",
1867                "subdir2",
1868                "subdir2/f.txt",
1869                "subdir2/g.txt",
1870                "subdir2/h.txt",
1871                "subdir2/j.txt"
1872            ]
1873        );
1874        assert!(project.worktree_for_id(worktree2_id, cx).is_none());
1875        assert_eq!(
1876            project
1877                .worktree_for_id(worktree4_id, cx)
1878                .unwrap()
1879                .read(cx)
1880                .snapshot()
1881                .paths()
1882                .map(|p| p.to_str().unwrap())
1883                .collect::<Vec<_>>(),
1884            vec!["z.txt"]
1885        );
1886    });
1887    project_b3.read_with(cx_b, |project, _| assert!(project.is_read_only()));
1888    buffer_a1.read_with(cx_a, |buffer, _| assert_eq!(buffer.text(), "WXaYZ"));
1889    buffer_b1.read_with(cx_b, |buffer, _| assert_eq!(buffer.text(), "WXaYZ"));
1890}
1891
1892#[gpui::test(iterations = 10)]
1893async fn test_active_call_events(
1894    deterministic: Arc<Deterministic>,
1895    cx_a: &mut TestAppContext,
1896    cx_b: &mut TestAppContext,
1897) {
1898    deterministic.forbid_parking();
1899    let mut server = TestServer::start(&deterministic).await;
1900    let client_a = server.create_client(cx_a, "user_a").await;
1901    let client_b = server.create_client(cx_b, "user_b").await;
1902    client_a.fs.insert_tree("/a", json!({})).await;
1903    client_b.fs.insert_tree("/b", json!({})).await;
1904
1905    let (project_a, _) = client_a.build_local_project("/a", cx_a).await;
1906    let (project_b, _) = client_b.build_local_project("/b", cx_b).await;
1907
1908    server
1909        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
1910        .await;
1911    let active_call_a = cx_a.read(ActiveCall::global);
1912    let active_call_b = cx_b.read(ActiveCall::global);
1913
1914    let events_a = active_call_events(cx_a);
1915    let events_b = active_call_events(cx_b);
1916
1917    let project_a_id = active_call_a
1918        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
1919        .await
1920        .unwrap();
1921    deterministic.run_until_parked();
1922    assert_eq!(mem::take(&mut *events_a.borrow_mut()), vec![]);
1923    assert_eq!(
1924        mem::take(&mut *events_b.borrow_mut()),
1925        vec![room::Event::RemoteProjectShared {
1926            owner: Arc::new(User {
1927                id: client_a.user_id().unwrap(),
1928                github_login: "user_a".to_string(),
1929                avatar: None,
1930            }),
1931            project_id: project_a_id,
1932            worktree_root_names: vec!["a".to_string()],
1933        }]
1934    );
1935
1936    let project_b_id = active_call_b
1937        .update(cx_b, |call, cx| call.share_project(project_b.clone(), cx))
1938        .await
1939        .unwrap();
1940    deterministic.run_until_parked();
1941    assert_eq!(
1942        mem::take(&mut *events_a.borrow_mut()),
1943        vec![room::Event::RemoteProjectShared {
1944            owner: Arc::new(User {
1945                id: client_b.user_id().unwrap(),
1946                github_login: "user_b".to_string(),
1947                avatar: None,
1948            }),
1949            project_id: project_b_id,
1950            worktree_root_names: vec!["b".to_string()]
1951        }]
1952    );
1953    assert_eq!(mem::take(&mut *events_b.borrow_mut()), vec![]);
1954
1955    // Sharing a project twice is idempotent.
1956    let project_b_id_2 = active_call_b
1957        .update(cx_b, |call, cx| call.share_project(project_b.clone(), cx))
1958        .await
1959        .unwrap();
1960    assert_eq!(project_b_id_2, project_b_id);
1961    deterministic.run_until_parked();
1962    assert_eq!(mem::take(&mut *events_a.borrow_mut()), vec![]);
1963    assert_eq!(mem::take(&mut *events_b.borrow_mut()), vec![]);
1964}
1965
1966fn active_call_events(cx: &mut TestAppContext) -> Rc<RefCell<Vec<room::Event>>> {
1967    let events = Rc::new(RefCell::new(Vec::new()));
1968    let active_call = cx.read(ActiveCall::global);
1969    cx.update({
1970        let events = events.clone();
1971        |cx| {
1972            cx.subscribe(&active_call, move |_, event, _| {
1973                events.borrow_mut().push(event.clone())
1974            })
1975            .detach()
1976        }
1977    });
1978    events
1979}
1980
1981#[gpui::test(iterations = 10)]
1982async fn test_room_location(
1983    deterministic: Arc<Deterministic>,
1984    cx_a: &mut TestAppContext,
1985    cx_b: &mut TestAppContext,
1986) {
1987    deterministic.forbid_parking();
1988    let mut server = TestServer::start(&deterministic).await;
1989    let client_a = server.create_client(cx_a, "user_a").await;
1990    let client_b = server.create_client(cx_b, "user_b").await;
1991    client_a.fs.insert_tree("/a", json!({})).await;
1992    client_b.fs.insert_tree("/b", json!({})).await;
1993
1994    let active_call_a = cx_a.read(ActiveCall::global);
1995    let active_call_b = cx_b.read(ActiveCall::global);
1996
1997    let a_notified = Rc::new(Cell::new(false));
1998    cx_a.update({
1999        let notified = a_notified.clone();
2000        |cx| {
2001            cx.observe(&active_call_a, move |_, _| notified.set(true))
2002                .detach()
2003        }
2004    });
2005
2006    let b_notified = Rc::new(Cell::new(false));
2007    cx_b.update({
2008        let b_notified = b_notified.clone();
2009        |cx| {
2010            cx.observe(&active_call_b, move |_, _| b_notified.set(true))
2011                .detach()
2012        }
2013    });
2014
2015    let (project_a, _) = client_a.build_local_project("/a", cx_a).await;
2016    active_call_a
2017        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
2018        .await
2019        .unwrap();
2020    let (project_b, _) = client_b.build_local_project("/b", cx_b).await;
2021
2022    server
2023        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
2024        .await;
2025    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
2026    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
2027    deterministic.run_until_parked();
2028    assert!(a_notified.take());
2029    assert_eq!(
2030        participant_locations(&room_a, cx_a),
2031        vec![("user_b".to_string(), ParticipantLocation::External)]
2032    );
2033    assert!(b_notified.take());
2034    assert_eq!(
2035        participant_locations(&room_b, cx_b),
2036        vec![("user_a".to_string(), ParticipantLocation::UnsharedProject)]
2037    );
2038
2039    let project_a_id = active_call_a
2040        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
2041        .await
2042        .unwrap();
2043    deterministic.run_until_parked();
2044    assert!(a_notified.take());
2045    assert_eq!(
2046        participant_locations(&room_a, cx_a),
2047        vec![("user_b".to_string(), ParticipantLocation::External)]
2048    );
2049    assert!(b_notified.take());
2050    assert_eq!(
2051        participant_locations(&room_b, cx_b),
2052        vec![(
2053            "user_a".to_string(),
2054            ParticipantLocation::SharedProject {
2055                project_id: project_a_id
2056            }
2057        )]
2058    );
2059
2060    let project_b_id = active_call_b
2061        .update(cx_b, |call, cx| call.share_project(project_b.clone(), cx))
2062        .await
2063        .unwrap();
2064    deterministic.run_until_parked();
2065    assert!(a_notified.take());
2066    assert_eq!(
2067        participant_locations(&room_a, cx_a),
2068        vec![("user_b".to_string(), ParticipantLocation::External)]
2069    );
2070    assert!(b_notified.take());
2071    assert_eq!(
2072        participant_locations(&room_b, cx_b),
2073        vec![(
2074            "user_a".to_string(),
2075            ParticipantLocation::SharedProject {
2076                project_id: project_a_id
2077            }
2078        )]
2079    );
2080
2081    active_call_b
2082        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
2083        .await
2084        .unwrap();
2085    deterministic.run_until_parked();
2086    assert!(a_notified.take());
2087    assert_eq!(
2088        participant_locations(&room_a, cx_a),
2089        vec![(
2090            "user_b".to_string(),
2091            ParticipantLocation::SharedProject {
2092                project_id: project_b_id
2093            }
2094        )]
2095    );
2096    assert!(b_notified.take());
2097    assert_eq!(
2098        participant_locations(&room_b, cx_b),
2099        vec![(
2100            "user_a".to_string(),
2101            ParticipantLocation::SharedProject {
2102                project_id: project_a_id
2103            }
2104        )]
2105    );
2106
2107    active_call_b
2108        .update(cx_b, |call, cx| call.set_location(None, cx))
2109        .await
2110        .unwrap();
2111    deterministic.run_until_parked();
2112    assert!(a_notified.take());
2113    assert_eq!(
2114        participant_locations(&room_a, cx_a),
2115        vec![("user_b".to_string(), ParticipantLocation::External)]
2116    );
2117    assert!(b_notified.take());
2118    assert_eq!(
2119        participant_locations(&room_b, cx_b),
2120        vec![(
2121            "user_a".to_string(),
2122            ParticipantLocation::SharedProject {
2123                project_id: project_a_id
2124            }
2125        )]
2126    );
2127
2128    fn participant_locations(
2129        room: &ModelHandle<Room>,
2130        cx: &TestAppContext,
2131    ) -> Vec<(String, ParticipantLocation)> {
2132        room.read_with(cx, |room, _| {
2133            room.remote_participants()
2134                .values()
2135                .map(|participant| {
2136                    (
2137                        participant.user.github_login.to_string(),
2138                        participant.location,
2139                    )
2140                })
2141                .collect()
2142        })
2143    }
2144}
2145
2146#[gpui::test(iterations = 10)]
2147async fn test_propagate_saves_and_fs_changes(
2148    deterministic: Arc<Deterministic>,
2149    cx_a: &mut TestAppContext,
2150    cx_b: &mut TestAppContext,
2151    cx_c: &mut TestAppContext,
2152) {
2153    deterministic.forbid_parking();
2154    let mut server = TestServer::start(&deterministic).await;
2155    let client_a = server.create_client(cx_a, "user_a").await;
2156    let client_b = server.create_client(cx_b, "user_b").await;
2157    let client_c = server.create_client(cx_c, "user_c").await;
2158
2159    server
2160        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
2161        .await;
2162    let active_call_a = cx_a.read(ActiveCall::global);
2163
2164    let rust = Arc::new(Language::new(
2165        LanguageConfig {
2166            name: "Rust".into(),
2167            path_suffixes: vec!["rs".to_string()],
2168            ..Default::default()
2169        },
2170        Some(tree_sitter_rust::language()),
2171    ));
2172    let javascript = Arc::new(Language::new(
2173        LanguageConfig {
2174            name: "JavaScript".into(),
2175            path_suffixes: vec!["js".to_string()],
2176            ..Default::default()
2177        },
2178        Some(tree_sitter_rust::language()),
2179    ));
2180    for client in [&client_a, &client_b, &client_c] {
2181        client.language_registry.add(rust.clone());
2182        client.language_registry.add(javascript.clone());
2183    }
2184
2185    client_a
2186        .fs
2187        .insert_tree(
2188            "/a",
2189            json!({
2190                "file1.rs": "",
2191                "file2": ""
2192            }),
2193        )
2194        .await;
2195    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
2196    let worktree_a = project_a.read_with(cx_a, |p, cx| p.worktrees(cx).next().unwrap());
2197    let project_id = active_call_a
2198        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
2199        .await
2200        .unwrap();
2201
2202    // Join that worktree as clients B and C.
2203    let project_b = client_b.build_remote_project(project_id, cx_b).await;
2204    let project_c = client_c.build_remote_project(project_id, cx_c).await;
2205    let worktree_b = project_b.read_with(cx_b, |p, cx| p.worktrees(cx).next().unwrap());
2206    let worktree_c = project_c.read_with(cx_c, |p, cx| p.worktrees(cx).next().unwrap());
2207
2208    // Open and edit a buffer as both guests B and C.
2209    let buffer_b = project_b
2210        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "file1.rs"), cx))
2211        .await
2212        .unwrap();
2213    let buffer_c = project_c
2214        .update(cx_c, |p, cx| p.open_buffer((worktree_id, "file1.rs"), cx))
2215        .await
2216        .unwrap();
2217    buffer_b.read_with(cx_b, |buffer, _| {
2218        assert_eq!(&*buffer.language().unwrap().name(), "Rust");
2219    });
2220    buffer_c.read_with(cx_c, |buffer, _| {
2221        assert_eq!(&*buffer.language().unwrap().name(), "Rust");
2222    });
2223    buffer_b.update(cx_b, |buf, cx| buf.edit([(0..0, "i-am-b, ")], None, cx));
2224    buffer_c.update(cx_c, |buf, cx| buf.edit([(0..0, "i-am-c, ")], None, cx));
2225
2226    // Open and edit that buffer as the host.
2227    let buffer_a = project_a
2228        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "file1.rs"), cx))
2229        .await
2230        .unwrap();
2231
2232    deterministic.run_until_parked();
2233    buffer_a.read_with(cx_a, |buf, _| assert_eq!(buf.text(), "i-am-c, i-am-b, "));
2234    buffer_a.update(cx_a, |buf, cx| {
2235        buf.edit([(buf.len()..buf.len(), "i-am-a")], None, cx)
2236    });
2237
2238    deterministic.run_until_parked();
2239    buffer_a.read_with(cx_a, |buf, _| {
2240        assert_eq!(buf.text(), "i-am-c, i-am-b, i-am-a");
2241    });
2242    buffer_b.read_with(cx_b, |buf, _| {
2243        assert_eq!(buf.text(), "i-am-c, i-am-b, i-am-a");
2244    });
2245    buffer_c.read_with(cx_c, |buf, _| {
2246        assert_eq!(buf.text(), "i-am-c, i-am-b, i-am-a");
2247    });
2248
2249    // Edit the buffer as the host and concurrently save as guest B.
2250    let save_b = project_b.update(cx_b, |project, cx| {
2251        project.save_buffer(buffer_b.clone(), cx)
2252    });
2253    buffer_a.update(cx_a, |buf, cx| buf.edit([(0..0, "hi-a, ")], None, cx));
2254    save_b.await.unwrap();
2255    assert_eq!(
2256        client_a.fs.load("/a/file1.rs".as_ref()).await.unwrap(),
2257        "hi-a, i-am-c, i-am-b, i-am-a"
2258    );
2259
2260    deterministic.run_until_parked();
2261    buffer_a.read_with(cx_a, |buf, _| assert!(!buf.is_dirty()));
2262    buffer_b.read_with(cx_b, |buf, _| assert!(!buf.is_dirty()));
2263    buffer_c.read_with(cx_c, |buf, _| assert!(!buf.is_dirty()));
2264
2265    // Make changes on host's file system, see those changes on guest worktrees.
2266    client_a
2267        .fs
2268        .rename(
2269            "/a/file1.rs".as_ref(),
2270            "/a/file1.js".as_ref(),
2271            Default::default(),
2272        )
2273        .await
2274        .unwrap();
2275    client_a
2276        .fs
2277        .rename("/a/file2".as_ref(), "/a/file3".as_ref(), Default::default())
2278        .await
2279        .unwrap();
2280    client_a.fs.insert_file("/a/file4", "4".into()).await;
2281    deterministic.run_until_parked();
2282
2283    worktree_a.read_with(cx_a, |tree, _| {
2284        assert_eq!(
2285            tree.paths()
2286                .map(|p| p.to_string_lossy())
2287                .collect::<Vec<_>>(),
2288            ["file1.js", "file3", "file4"]
2289        )
2290    });
2291    worktree_b.read_with(cx_b, |tree, _| {
2292        assert_eq!(
2293            tree.paths()
2294                .map(|p| p.to_string_lossy())
2295                .collect::<Vec<_>>(),
2296            ["file1.js", "file3", "file4"]
2297        )
2298    });
2299    worktree_c.read_with(cx_c, |tree, _| {
2300        assert_eq!(
2301            tree.paths()
2302                .map(|p| p.to_string_lossy())
2303                .collect::<Vec<_>>(),
2304            ["file1.js", "file3", "file4"]
2305        )
2306    });
2307
2308    // Ensure buffer files are updated as well.
2309    buffer_a.read_with(cx_a, |buffer, _| {
2310        assert_eq!(buffer.file().unwrap().path().to_str(), Some("file1.js"));
2311        assert_eq!(&*buffer.language().unwrap().name(), "JavaScript");
2312    });
2313    buffer_b.read_with(cx_b, |buffer, _| {
2314        assert_eq!(buffer.file().unwrap().path().to_str(), Some("file1.js"));
2315        assert_eq!(&*buffer.language().unwrap().name(), "JavaScript");
2316    });
2317    buffer_c.read_with(cx_c, |buffer, _| {
2318        assert_eq!(buffer.file().unwrap().path().to_str(), Some("file1.js"));
2319        assert_eq!(&*buffer.language().unwrap().name(), "JavaScript");
2320    });
2321
2322    let new_buffer_a = project_a
2323        .update(cx_a, |p, cx| p.create_buffer("", None, cx))
2324        .unwrap();
2325    let new_buffer_id = new_buffer_a.read_with(cx_a, |buffer, _| buffer.remote_id());
2326    let new_buffer_b = project_b
2327        .update(cx_b, |p, cx| p.open_buffer_by_id(new_buffer_id, cx))
2328        .await
2329        .unwrap();
2330    new_buffer_b.read_with(cx_b, |buffer, _| {
2331        assert!(buffer.file().is_none());
2332    });
2333
2334    new_buffer_a.update(cx_a, |buffer, cx| {
2335        buffer.edit([(0..0, "ok")], None, cx);
2336    });
2337    project_a
2338        .update(cx_a, |project, cx| {
2339            project.save_buffer_as(new_buffer_a.clone(), "/a/file3.rs".into(), cx)
2340        })
2341        .await
2342        .unwrap();
2343
2344    deterministic.run_until_parked();
2345    new_buffer_b.read_with(cx_b, |buffer_b, _| {
2346        assert_eq!(
2347            buffer_b.file().unwrap().path().as_ref(),
2348            Path::new("file3.rs")
2349        );
2350
2351        new_buffer_a.read_with(cx_a, |buffer_a, _| {
2352            assert_eq!(buffer_b.saved_mtime(), buffer_a.saved_mtime());
2353            assert_eq!(buffer_b.saved_version(), buffer_a.saved_version());
2354        });
2355    });
2356}
2357
2358#[gpui::test(iterations = 10)]
2359async fn test_git_diff_base_change(
2360    deterministic: Arc<Deterministic>,
2361    cx_a: &mut TestAppContext,
2362    cx_b: &mut TestAppContext,
2363) {
2364    deterministic.forbid_parking();
2365    let mut server = TestServer::start(&deterministic).await;
2366    let client_a = server.create_client(cx_a, "user_a").await;
2367    let client_b = server.create_client(cx_b, "user_b").await;
2368    server
2369        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
2370        .await;
2371    let active_call_a = cx_a.read(ActiveCall::global);
2372
2373    client_a
2374        .fs
2375        .insert_tree(
2376            "/dir",
2377            json!({
2378            ".git": {},
2379            "sub": {
2380                ".git": {},
2381                "b.txt": "
2382                    one
2383                    two
2384                    three
2385                ".unindent(),
2386            },
2387            "a.txt": "
2388                    one
2389                    two
2390                    three
2391                ".unindent(),
2392            }),
2393        )
2394        .await;
2395
2396    let (project_local, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
2397    let project_id = active_call_a
2398        .update(cx_a, |call, cx| {
2399            call.share_project(project_local.clone(), cx)
2400        })
2401        .await
2402        .unwrap();
2403
2404    let project_remote = client_b.build_remote_project(project_id, cx_b).await;
2405
2406    let diff_base = "
2407        one
2408        three
2409    "
2410    .unindent();
2411
2412    let new_diff_base = "
2413        one
2414        two
2415    "
2416    .unindent();
2417
2418    client_a
2419        .fs
2420        .as_fake()
2421        .set_index_for_repo(
2422            Path::new("/dir/.git"),
2423            &[(Path::new("a.txt"), diff_base.clone())],
2424        )
2425        .await;
2426
2427    // Create the buffer
2428    let buffer_local_a = project_local
2429        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
2430        .await
2431        .unwrap();
2432
2433    // Wait for it to catch up to the new diff
2434    deterministic.run_until_parked();
2435
2436    // Smoke test diffing
2437    buffer_local_a.read_with(cx_a, |buffer, _| {
2438        assert_eq!(buffer.diff_base(), Some(diff_base.as_ref()));
2439        git::diff::assert_hunks(
2440            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2441            &buffer,
2442            &diff_base,
2443            &[(1..2, "", "two\n")],
2444        );
2445    });
2446
2447    // Create remote buffer
2448    let buffer_remote_a = project_remote
2449        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
2450        .await
2451        .unwrap();
2452
2453    // Wait remote buffer to catch up to the new diff
2454    deterministic.run_until_parked();
2455
2456    // Smoke test diffing
2457    buffer_remote_a.read_with(cx_b, |buffer, _| {
2458        assert_eq!(buffer.diff_base(), Some(diff_base.as_ref()));
2459        git::diff::assert_hunks(
2460            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2461            &buffer,
2462            &diff_base,
2463            &[(1..2, "", "two\n")],
2464        );
2465    });
2466
2467    client_a
2468        .fs
2469        .as_fake()
2470        .set_index_for_repo(
2471            Path::new("/dir/.git"),
2472            &[(Path::new("a.txt"), new_diff_base.clone())],
2473        )
2474        .await;
2475
2476    // Wait for buffer_local_a to receive it
2477    deterministic.run_until_parked();
2478
2479    // Smoke test new diffing
2480    buffer_local_a.read_with(cx_a, |buffer, _| {
2481        assert_eq!(buffer.diff_base(), Some(new_diff_base.as_ref()));
2482
2483        git::diff::assert_hunks(
2484            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2485            &buffer,
2486            &diff_base,
2487            &[(2..3, "", "three\n")],
2488        );
2489    });
2490
2491    // Smoke test B
2492    buffer_remote_a.read_with(cx_b, |buffer, _| {
2493        assert_eq!(buffer.diff_base(), Some(new_diff_base.as_ref()));
2494        git::diff::assert_hunks(
2495            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2496            &buffer,
2497            &diff_base,
2498            &[(2..3, "", "three\n")],
2499        );
2500    });
2501
2502    //Nested git dir
2503
2504    let diff_base = "
2505        one
2506        three
2507    "
2508    .unindent();
2509
2510    let new_diff_base = "
2511        one
2512        two
2513    "
2514    .unindent();
2515
2516    client_a
2517        .fs
2518        .as_fake()
2519        .set_index_for_repo(
2520            Path::new("/dir/sub/.git"),
2521            &[(Path::new("b.txt"), diff_base.clone())],
2522        )
2523        .await;
2524
2525    // Create the buffer
2526    let buffer_local_b = project_local
2527        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "sub/b.txt"), cx))
2528        .await
2529        .unwrap();
2530
2531    // Wait for it to catch up to the new diff
2532    deterministic.run_until_parked();
2533
2534    // Smoke test diffing
2535    buffer_local_b.read_with(cx_a, |buffer, _| {
2536        assert_eq!(buffer.diff_base(), Some(diff_base.as_ref()));
2537        git::diff::assert_hunks(
2538            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2539            &buffer,
2540            &diff_base,
2541            &[(1..2, "", "two\n")],
2542        );
2543    });
2544
2545    // Create remote buffer
2546    let buffer_remote_b = project_remote
2547        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "sub/b.txt"), cx))
2548        .await
2549        .unwrap();
2550
2551    // Wait remote buffer to catch up to the new diff
2552    deterministic.run_until_parked();
2553
2554    // Smoke test diffing
2555    buffer_remote_b.read_with(cx_b, |buffer, _| {
2556        assert_eq!(buffer.diff_base(), Some(diff_base.as_ref()));
2557        git::diff::assert_hunks(
2558            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2559            &buffer,
2560            &diff_base,
2561            &[(1..2, "", "two\n")],
2562        );
2563    });
2564
2565    client_a
2566        .fs
2567        .as_fake()
2568        .set_index_for_repo(
2569            Path::new("/dir/sub/.git"),
2570            &[(Path::new("b.txt"), new_diff_base.clone())],
2571        )
2572        .await;
2573
2574    // Wait for buffer_local_b to receive it
2575    deterministic.run_until_parked();
2576
2577    // Smoke test new diffing
2578    buffer_local_b.read_with(cx_a, |buffer, _| {
2579        assert_eq!(buffer.diff_base(), Some(new_diff_base.as_ref()));
2580        println!("{:?}", buffer.as_rope().to_string());
2581        println!("{:?}", buffer.diff_base());
2582        println!(
2583            "{:?}",
2584            buffer
2585                .snapshot()
2586                .git_diff_hunks_in_row_range(0..4)
2587                .collect::<Vec<_>>()
2588        );
2589
2590        git::diff::assert_hunks(
2591            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2592            &buffer,
2593            &diff_base,
2594            &[(2..3, "", "three\n")],
2595        );
2596    });
2597
2598    // Smoke test B
2599    buffer_remote_b.read_with(cx_b, |buffer, _| {
2600        assert_eq!(buffer.diff_base(), Some(new_diff_base.as_ref()));
2601        git::diff::assert_hunks(
2602            buffer.snapshot().git_diff_hunks_in_row_range(0..4),
2603            &buffer,
2604            &diff_base,
2605            &[(2..3, "", "three\n")],
2606        );
2607    });
2608}
2609
2610#[gpui::test]
2611async fn test_git_branch_name(
2612    deterministic: Arc<Deterministic>,
2613    cx_a: &mut TestAppContext,
2614    cx_b: &mut TestAppContext,
2615    cx_c: &mut TestAppContext,
2616) {
2617    deterministic.forbid_parking();
2618    let mut server = TestServer::start(&deterministic).await;
2619    let client_a = server.create_client(cx_a, "user_a").await;
2620    let client_b = server.create_client(cx_b, "user_b").await;
2621    let client_c = server.create_client(cx_c, "user_c").await;
2622    server
2623        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
2624        .await;
2625    let active_call_a = cx_a.read(ActiveCall::global);
2626
2627    client_a
2628        .fs
2629        .insert_tree(
2630            "/dir",
2631            json!({
2632            ".git": {},
2633            }),
2634        )
2635        .await;
2636
2637    let (project_local, _worktree_id) = client_a.build_local_project("/dir", cx_a).await;
2638    let project_id = active_call_a
2639        .update(cx_a, |call, cx| {
2640            call.share_project(project_local.clone(), cx)
2641        })
2642        .await
2643        .unwrap();
2644
2645    let project_remote = client_b.build_remote_project(project_id, cx_b).await;
2646    client_a
2647        .fs
2648        .as_fake()
2649        .set_branch_name(Path::new("/dir/.git"), Some("branch-1"))
2650        .await;
2651
2652    // Wait for it to catch up to the new branch
2653    deterministic.run_until_parked();
2654
2655    #[track_caller]
2656    fn assert_branch(branch_name: Option<impl Into<String>>, project: &Project, cx: &AppContext) {
2657        let branch_name = branch_name.map(Into::into);
2658        let worktrees = project.visible_worktrees(cx).collect::<Vec<_>>();
2659        assert_eq!(worktrees.len(), 1);
2660        let worktree = worktrees[0].clone();
2661        let root_entry = worktree.read(cx).snapshot().root_git_entry().unwrap();
2662        assert_eq!(root_entry.branch(), branch_name.map(Into::into));
2663    }
2664
2665    // Smoke test branch reading
2666    project_local.read_with(cx_a, |project, cx| {
2667        assert_branch(Some("branch-1"), project, cx)
2668    });
2669    project_remote.read_with(cx_b, |project, cx| {
2670        assert_branch(Some("branch-1"), project, cx)
2671    });
2672
2673    client_a
2674        .fs
2675        .as_fake()
2676        .set_branch_name(Path::new("/dir/.git"), Some("branch-2"))
2677        .await;
2678
2679    // Wait for buffer_local_a to receive it
2680    deterministic.run_until_parked();
2681
2682    // Smoke test branch reading
2683    project_local.read_with(cx_a, |project, cx| {
2684        assert_branch(Some("branch-2"), project, cx)
2685    });
2686    project_remote.read_with(cx_b, |project, cx| {
2687        assert_branch(Some("branch-2"), project, cx)
2688    });
2689
2690    let project_remote_c = client_c.build_remote_project(project_id, cx_c).await;
2691    deterministic.run_until_parked();
2692    project_remote_c.read_with(cx_c, |project, cx| {
2693        assert_branch(Some("branch-2"), project, cx)
2694    });
2695}
2696
2697#[gpui::test]
2698async fn test_git_status_sync(
2699    deterministic: Arc<Deterministic>,
2700    cx_a: &mut TestAppContext,
2701    cx_b: &mut TestAppContext,
2702    cx_c: &mut TestAppContext,
2703) {
2704    deterministic.forbid_parking();
2705    let mut server = TestServer::start(&deterministic).await;
2706    let client_a = server.create_client(cx_a, "user_a").await;
2707    let client_b = server.create_client(cx_b, "user_b").await;
2708    let client_c = server.create_client(cx_c, "user_c").await;
2709    server
2710        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
2711        .await;
2712    let active_call_a = cx_a.read(ActiveCall::global);
2713
2714    client_a
2715        .fs
2716        .insert_tree(
2717            "/dir",
2718            json!({
2719            ".git": {},
2720            "a.txt": "a",
2721            "b.txt": "b",
2722            }),
2723        )
2724        .await;
2725
2726    const A_TXT: &'static str = "a.txt";
2727    const B_TXT: &'static str = "b.txt";
2728
2729    client_a
2730        .fs
2731        .as_fake()
2732        .set_status_for_repo(
2733            Path::new("/dir/.git"),
2734            &[
2735                (&Path::new(A_TXT), GitFileStatus::Added),
2736                (&Path::new(B_TXT), GitFileStatus::Added),
2737            ],
2738        )
2739        .await;
2740
2741    let (project_local, _worktree_id) = client_a.build_local_project("/dir", cx_a).await;
2742    let project_id = active_call_a
2743        .update(cx_a, |call, cx| {
2744            call.share_project(project_local.clone(), cx)
2745        })
2746        .await
2747        .unwrap();
2748
2749    let project_remote = client_b.build_remote_project(project_id, cx_b).await;
2750
2751    // Wait for it to catch up to the new status
2752    deterministic.run_until_parked();
2753
2754    #[track_caller]
2755    fn assert_status(
2756        file: &impl AsRef<Path>,
2757        status: Option<GitFileStatus>,
2758        project: &Project,
2759        cx: &AppContext,
2760    ) {
2761        let file = file.as_ref();
2762        let worktrees = project.visible_worktrees(cx).collect::<Vec<_>>();
2763        assert_eq!(worktrees.len(), 1);
2764        let worktree = worktrees[0].clone();
2765        let snapshot = worktree.read(cx).snapshot();
2766        let root_entry = snapshot.root_git_entry().unwrap();
2767        assert_eq!(root_entry.status_for_file(&snapshot, file), status);
2768    }
2769
2770    // Smoke test status reading
2771    project_local.read_with(cx_a, |project, cx| {
2772        assert_status(&Path::new(A_TXT), Some(GitFileStatus::Added), project, cx);
2773        assert_status(&Path::new(B_TXT), Some(GitFileStatus::Added), project, cx);
2774    });
2775    project_remote.read_with(cx_b, |project, cx| {
2776        assert_status(&Path::new(A_TXT), Some(GitFileStatus::Added), project, cx);
2777        assert_status(&Path::new(B_TXT), Some(GitFileStatus::Added), project, cx);
2778    });
2779
2780    client_a
2781        .fs
2782        .as_fake()
2783        .set_status_for_repo(
2784            Path::new("/dir/.git"),
2785            &[
2786                (&Path::new(A_TXT), GitFileStatus::Modified),
2787                (&Path::new(B_TXT), GitFileStatus::Modified),
2788            ],
2789        )
2790        .await;
2791
2792    // Wait for buffer_local_a to receive it
2793    deterministic.run_until_parked();
2794
2795    // Smoke test status reading
2796    project_local.read_with(cx_a, |project, cx| {
2797        assert_status(
2798            &Path::new(A_TXT),
2799            Some(GitFileStatus::Modified),
2800            project,
2801            cx,
2802        );
2803        assert_status(
2804            &Path::new(B_TXT),
2805            Some(GitFileStatus::Modified),
2806            project,
2807            cx,
2808        );
2809    });
2810    project_remote.read_with(cx_b, |project, cx| {
2811        assert_status(
2812            &Path::new(A_TXT),
2813            Some(GitFileStatus::Modified),
2814            project,
2815            cx,
2816        );
2817        assert_status(
2818            &Path::new(B_TXT),
2819            Some(GitFileStatus::Modified),
2820            project,
2821            cx,
2822        );
2823    });
2824
2825    // And synchronization while joining
2826    let project_remote_c = client_c.build_remote_project(project_id, cx_c).await;
2827    deterministic.run_until_parked();
2828
2829    project_remote_c.read_with(cx_c, |project, cx| {
2830        assert_status(
2831            &Path::new(A_TXT),
2832            Some(GitFileStatus::Modified),
2833            project,
2834            cx,
2835        );
2836        assert_status(
2837            &Path::new(B_TXT),
2838            Some(GitFileStatus::Modified),
2839            project,
2840            cx,
2841        );
2842    });
2843}
2844
2845#[gpui::test(iterations = 10)]
2846async fn test_fs_operations(
2847    deterministic: Arc<Deterministic>,
2848    cx_a: &mut TestAppContext,
2849    cx_b: &mut TestAppContext,
2850) {
2851    deterministic.forbid_parking();
2852    let mut server = TestServer::start(&deterministic).await;
2853    let client_a = server.create_client(cx_a, "user_a").await;
2854    let client_b = server.create_client(cx_b, "user_b").await;
2855    server
2856        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
2857        .await;
2858    let active_call_a = cx_a.read(ActiveCall::global);
2859
2860    client_a
2861        .fs
2862        .insert_tree(
2863            "/dir",
2864            json!({
2865                "a.txt": "a-contents",
2866                "b.txt": "b-contents",
2867            }),
2868        )
2869        .await;
2870    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
2871    let project_id = active_call_a
2872        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
2873        .await
2874        .unwrap();
2875    let project_b = client_b.build_remote_project(project_id, cx_b).await;
2876
2877    let worktree_a = project_a.read_with(cx_a, |project, cx| project.worktrees(cx).next().unwrap());
2878    let worktree_b = project_b.read_with(cx_b, |project, cx| project.worktrees(cx).next().unwrap());
2879
2880    let entry = project_b
2881        .update(cx_b, |project, cx| {
2882            project
2883                .create_entry((worktree_id, "c.txt"), false, cx)
2884                .unwrap()
2885        })
2886        .await
2887        .unwrap();
2888    worktree_a.read_with(cx_a, |worktree, _| {
2889        assert_eq!(
2890            worktree
2891                .paths()
2892                .map(|p| p.to_string_lossy())
2893                .collect::<Vec<_>>(),
2894            ["a.txt", "b.txt", "c.txt"]
2895        );
2896    });
2897    worktree_b.read_with(cx_b, |worktree, _| {
2898        assert_eq!(
2899            worktree
2900                .paths()
2901                .map(|p| p.to_string_lossy())
2902                .collect::<Vec<_>>(),
2903            ["a.txt", "b.txt", "c.txt"]
2904        );
2905    });
2906
2907    project_b
2908        .update(cx_b, |project, cx| {
2909            project.rename_entry(entry.id, Path::new("d.txt"), cx)
2910        })
2911        .unwrap()
2912        .await
2913        .unwrap();
2914    worktree_a.read_with(cx_a, |worktree, _| {
2915        assert_eq!(
2916            worktree
2917                .paths()
2918                .map(|p| p.to_string_lossy())
2919                .collect::<Vec<_>>(),
2920            ["a.txt", "b.txt", "d.txt"]
2921        );
2922    });
2923    worktree_b.read_with(cx_b, |worktree, _| {
2924        assert_eq!(
2925            worktree
2926                .paths()
2927                .map(|p| p.to_string_lossy())
2928                .collect::<Vec<_>>(),
2929            ["a.txt", "b.txt", "d.txt"]
2930        );
2931    });
2932
2933    let dir_entry = project_b
2934        .update(cx_b, |project, cx| {
2935            project
2936                .create_entry((worktree_id, "DIR"), true, cx)
2937                .unwrap()
2938        })
2939        .await
2940        .unwrap();
2941    worktree_a.read_with(cx_a, |worktree, _| {
2942        assert_eq!(
2943            worktree
2944                .paths()
2945                .map(|p| p.to_string_lossy())
2946                .collect::<Vec<_>>(),
2947            ["DIR", "a.txt", "b.txt", "d.txt"]
2948        );
2949    });
2950    worktree_b.read_with(cx_b, |worktree, _| {
2951        assert_eq!(
2952            worktree
2953                .paths()
2954                .map(|p| p.to_string_lossy())
2955                .collect::<Vec<_>>(),
2956            ["DIR", "a.txt", "b.txt", "d.txt"]
2957        );
2958    });
2959
2960    project_b
2961        .update(cx_b, |project, cx| {
2962            project
2963                .create_entry((worktree_id, "DIR/e.txt"), false, cx)
2964                .unwrap()
2965        })
2966        .await
2967        .unwrap();
2968    project_b
2969        .update(cx_b, |project, cx| {
2970            project
2971                .create_entry((worktree_id, "DIR/SUBDIR"), true, cx)
2972                .unwrap()
2973        })
2974        .await
2975        .unwrap();
2976    project_b
2977        .update(cx_b, |project, cx| {
2978            project
2979                .create_entry((worktree_id, "DIR/SUBDIR/f.txt"), false, cx)
2980                .unwrap()
2981        })
2982        .await
2983        .unwrap();
2984    worktree_a.read_with(cx_a, |worktree, _| {
2985        assert_eq!(
2986            worktree
2987                .paths()
2988                .map(|p| p.to_string_lossy())
2989                .collect::<Vec<_>>(),
2990            [
2991                "DIR",
2992                "DIR/SUBDIR",
2993                "DIR/SUBDIR/f.txt",
2994                "DIR/e.txt",
2995                "a.txt",
2996                "b.txt",
2997                "d.txt"
2998            ]
2999        );
3000    });
3001    worktree_b.read_with(cx_b, |worktree, _| {
3002        assert_eq!(
3003            worktree
3004                .paths()
3005                .map(|p| p.to_string_lossy())
3006                .collect::<Vec<_>>(),
3007            [
3008                "DIR",
3009                "DIR/SUBDIR",
3010                "DIR/SUBDIR/f.txt",
3011                "DIR/e.txt",
3012                "a.txt",
3013                "b.txt",
3014                "d.txt"
3015            ]
3016        );
3017    });
3018
3019    project_b
3020        .update(cx_b, |project, cx| {
3021            project
3022                .copy_entry(entry.id, Path::new("f.txt"), cx)
3023                .unwrap()
3024        })
3025        .await
3026        .unwrap();
3027    worktree_a.read_with(cx_a, |worktree, _| {
3028        assert_eq!(
3029            worktree
3030                .paths()
3031                .map(|p| p.to_string_lossy())
3032                .collect::<Vec<_>>(),
3033            [
3034                "DIR",
3035                "DIR/SUBDIR",
3036                "DIR/SUBDIR/f.txt",
3037                "DIR/e.txt",
3038                "a.txt",
3039                "b.txt",
3040                "d.txt",
3041                "f.txt"
3042            ]
3043        );
3044    });
3045    worktree_b.read_with(cx_b, |worktree, _| {
3046        assert_eq!(
3047            worktree
3048                .paths()
3049                .map(|p| p.to_string_lossy())
3050                .collect::<Vec<_>>(),
3051            [
3052                "DIR",
3053                "DIR/SUBDIR",
3054                "DIR/SUBDIR/f.txt",
3055                "DIR/e.txt",
3056                "a.txt",
3057                "b.txt",
3058                "d.txt",
3059                "f.txt"
3060            ]
3061        );
3062    });
3063
3064    project_b
3065        .update(cx_b, |project, cx| {
3066            project.delete_entry(dir_entry.id, cx).unwrap()
3067        })
3068        .await
3069        .unwrap();
3070    deterministic.run_until_parked();
3071
3072    worktree_a.read_with(cx_a, |worktree, _| {
3073        assert_eq!(
3074            worktree
3075                .paths()
3076                .map(|p| p.to_string_lossy())
3077                .collect::<Vec<_>>(),
3078            ["a.txt", "b.txt", "d.txt", "f.txt"]
3079        );
3080    });
3081    worktree_b.read_with(cx_b, |worktree, _| {
3082        assert_eq!(
3083            worktree
3084                .paths()
3085                .map(|p| p.to_string_lossy())
3086                .collect::<Vec<_>>(),
3087            ["a.txt", "b.txt", "d.txt", "f.txt"]
3088        );
3089    });
3090
3091    project_b
3092        .update(cx_b, |project, cx| {
3093            project.delete_entry(entry.id, cx).unwrap()
3094        })
3095        .await
3096        .unwrap();
3097    worktree_a.read_with(cx_a, |worktree, _| {
3098        assert_eq!(
3099            worktree
3100                .paths()
3101                .map(|p| p.to_string_lossy())
3102                .collect::<Vec<_>>(),
3103            ["a.txt", "b.txt", "f.txt"]
3104        );
3105    });
3106    worktree_b.read_with(cx_b, |worktree, _| {
3107        assert_eq!(
3108            worktree
3109                .paths()
3110                .map(|p| p.to_string_lossy())
3111                .collect::<Vec<_>>(),
3112            ["a.txt", "b.txt", "f.txt"]
3113        );
3114    });
3115}
3116
3117#[gpui::test(iterations = 10)]
3118async fn test_buffer_conflict_after_save(
3119    deterministic: Arc<Deterministic>,
3120    cx_a: &mut TestAppContext,
3121    cx_b: &mut TestAppContext,
3122) {
3123    deterministic.forbid_parking();
3124    let mut server = TestServer::start(&deterministic).await;
3125    let client_a = server.create_client(cx_a, "user_a").await;
3126    let client_b = server.create_client(cx_b, "user_b").await;
3127    server
3128        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3129        .await;
3130    let active_call_a = cx_a.read(ActiveCall::global);
3131
3132    client_a
3133        .fs
3134        .insert_tree(
3135            "/dir",
3136            json!({
3137                "a.txt": "a-contents",
3138            }),
3139        )
3140        .await;
3141    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3142    let project_id = active_call_a
3143        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3144        .await
3145        .unwrap();
3146    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3147
3148    // Open a buffer as client B
3149    let buffer_b = project_b
3150        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3151        .await
3152        .unwrap();
3153
3154    buffer_b.update(cx_b, |buf, cx| buf.edit([(0..0, "world ")], None, cx));
3155    buffer_b.read_with(cx_b, |buf, _| {
3156        assert!(buf.is_dirty());
3157        assert!(!buf.has_conflict());
3158    });
3159
3160    project_b
3161        .update(cx_b, |project, cx| {
3162            project.save_buffer(buffer_b.clone(), cx)
3163        })
3164        .await
3165        .unwrap();
3166    cx_a.foreground().forbid_parking();
3167    buffer_b.read_with(cx_b, |buffer_b, _| assert!(!buffer_b.is_dirty()));
3168    buffer_b.read_with(cx_b, |buf, _| {
3169        assert!(!buf.has_conflict());
3170    });
3171
3172    buffer_b.update(cx_b, |buf, cx| buf.edit([(0..0, "hello ")], None, cx));
3173    buffer_b.read_with(cx_b, |buf, _| {
3174        assert!(buf.is_dirty());
3175        assert!(!buf.has_conflict());
3176    });
3177}
3178
3179#[gpui::test(iterations = 10)]
3180async fn test_buffer_reloading(
3181    deterministic: Arc<Deterministic>,
3182    cx_a: &mut TestAppContext,
3183    cx_b: &mut TestAppContext,
3184) {
3185    deterministic.forbid_parking();
3186    let mut server = TestServer::start(&deterministic).await;
3187    let client_a = server.create_client(cx_a, "user_a").await;
3188    let client_b = server.create_client(cx_b, "user_b").await;
3189    server
3190        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3191        .await;
3192    let active_call_a = cx_a.read(ActiveCall::global);
3193
3194    client_a
3195        .fs
3196        .insert_tree(
3197            "/dir",
3198            json!({
3199                "a.txt": "a\nb\nc",
3200            }),
3201        )
3202        .await;
3203    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3204    let project_id = active_call_a
3205        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3206        .await
3207        .unwrap();
3208    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3209
3210    // Open a buffer as client B
3211    let buffer_b = project_b
3212        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3213        .await
3214        .unwrap();
3215    buffer_b.read_with(cx_b, |buf, _| {
3216        assert!(!buf.is_dirty());
3217        assert!(!buf.has_conflict());
3218        assert_eq!(buf.line_ending(), LineEnding::Unix);
3219    });
3220
3221    let new_contents = Rope::from("d\ne\nf");
3222    client_a
3223        .fs
3224        .save("/dir/a.txt".as_ref(), &new_contents, LineEnding::Windows)
3225        .await
3226        .unwrap();
3227    cx_a.foreground().run_until_parked();
3228    buffer_b.read_with(cx_b, |buf, _| {
3229        assert_eq!(buf.text(), new_contents.to_string());
3230        assert!(!buf.is_dirty());
3231        assert!(!buf.has_conflict());
3232        assert_eq!(buf.line_ending(), LineEnding::Windows);
3233    });
3234}
3235
3236#[gpui::test(iterations = 10)]
3237async fn test_editing_while_guest_opens_buffer(
3238    deterministic: Arc<Deterministic>,
3239    cx_a: &mut TestAppContext,
3240    cx_b: &mut TestAppContext,
3241) {
3242    deterministic.forbid_parking();
3243    let mut server = TestServer::start(&deterministic).await;
3244    let client_a = server.create_client(cx_a, "user_a").await;
3245    let client_b = server.create_client(cx_b, "user_b").await;
3246    server
3247        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3248        .await;
3249    let active_call_a = cx_a.read(ActiveCall::global);
3250
3251    client_a
3252        .fs
3253        .insert_tree("/dir", json!({ "a.txt": "a-contents" }))
3254        .await;
3255    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3256    let project_id = active_call_a
3257        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3258        .await
3259        .unwrap();
3260    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3261
3262    // Open a buffer as client A
3263    let buffer_a = project_a
3264        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3265        .await
3266        .unwrap();
3267
3268    // Start opening the same buffer as client B
3269    let buffer_b = cx_b
3270        .background()
3271        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx)));
3272
3273    // Edit the buffer as client A while client B is still opening it.
3274    cx_b.background().simulate_random_delay().await;
3275    buffer_a.update(cx_a, |buf, cx| buf.edit([(0..0, "X")], None, cx));
3276    cx_b.background().simulate_random_delay().await;
3277    buffer_a.update(cx_a, |buf, cx| buf.edit([(1..1, "Y")], None, cx));
3278
3279    let text = buffer_a.read_with(cx_a, |buf, _| buf.text());
3280    let buffer_b = buffer_b.await.unwrap();
3281    cx_a.foreground().run_until_parked();
3282    buffer_b.read_with(cx_b, |buf, _| assert_eq!(buf.text(), text));
3283}
3284
3285#[gpui::test]
3286async fn test_newline_above_or_below_does_not_move_guest_cursor(
3287    deterministic: Arc<Deterministic>,
3288    cx_a: &mut TestAppContext,
3289    cx_b: &mut TestAppContext,
3290) {
3291    deterministic.forbid_parking();
3292    let mut server = TestServer::start(&deterministic).await;
3293    let client_a = server.create_client(cx_a, "user_a").await;
3294    let client_b = server.create_client(cx_b, "user_b").await;
3295    server
3296        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3297        .await;
3298    let active_call_a = cx_a.read(ActiveCall::global);
3299
3300    client_a
3301        .fs
3302        .insert_tree("/dir", json!({ "a.txt": "Some text\n" }))
3303        .await;
3304    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3305    let project_id = active_call_a
3306        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3307        .await
3308        .unwrap();
3309
3310    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3311
3312    // Open a buffer as client A
3313    let buffer_a = project_a
3314        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3315        .await
3316        .unwrap();
3317    let (window_a, _) = cx_a.add_window(|_| EmptyView);
3318    let editor_a = cx_a.add_view(window_a, |cx| {
3319        Editor::for_buffer(buffer_a, Some(project_a), cx)
3320    });
3321    let mut editor_cx_a = EditorTestContext {
3322        cx: cx_a,
3323        window_id: window_a,
3324        editor: editor_a,
3325    };
3326
3327    // Open a buffer as client B
3328    let buffer_b = project_b
3329        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3330        .await
3331        .unwrap();
3332    let (window_b, _) = cx_b.add_window(|_| EmptyView);
3333    let editor_b = cx_b.add_view(window_b, |cx| {
3334        Editor::for_buffer(buffer_b, Some(project_b), cx)
3335    });
3336    let mut editor_cx_b = EditorTestContext {
3337        cx: cx_b,
3338        window_id: window_b,
3339        editor: editor_b,
3340    };
3341
3342    // Test newline above
3343    editor_cx_a.set_selections_state(indoc! {"
3344        Some textˇ
3345    "});
3346    editor_cx_b.set_selections_state(indoc! {"
3347        Some textˇ
3348    "});
3349    editor_cx_a.update_editor(|editor, cx| editor.newline_above(&editor::NewlineAbove, cx));
3350    deterministic.run_until_parked();
3351    editor_cx_a.assert_editor_state(indoc! {"
3352        ˇ
3353        Some text
3354    "});
3355    editor_cx_b.assert_editor_state(indoc! {"
3356
3357        Some textˇ
3358    "});
3359
3360    // Test newline below
3361    editor_cx_a.set_selections_state(indoc! {"
3362
3363        Some textˇ
3364    "});
3365    editor_cx_b.set_selections_state(indoc! {"
3366
3367        Some textˇ
3368    "});
3369    editor_cx_a.update_editor(|editor, cx| editor.newline_below(&editor::NewlineBelow, cx));
3370    deterministic.run_until_parked();
3371    editor_cx_a.assert_editor_state(indoc! {"
3372
3373        Some text
3374        ˇ
3375    "});
3376    editor_cx_b.assert_editor_state(indoc! {"
3377
3378        Some textˇ
3379
3380    "});
3381}
3382
3383#[gpui::test(iterations = 10)]
3384async fn test_leaving_worktree_while_opening_buffer(
3385    deterministic: Arc<Deterministic>,
3386    cx_a: &mut TestAppContext,
3387    cx_b: &mut TestAppContext,
3388) {
3389    deterministic.forbid_parking();
3390    let mut server = TestServer::start(&deterministic).await;
3391    let client_a = server.create_client(cx_a, "user_a").await;
3392    let client_b = server.create_client(cx_b, "user_b").await;
3393    server
3394        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3395        .await;
3396    let active_call_a = cx_a.read(ActiveCall::global);
3397
3398    client_a
3399        .fs
3400        .insert_tree("/dir", json!({ "a.txt": "a-contents" }))
3401        .await;
3402    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3403    let project_id = active_call_a
3404        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3405        .await
3406        .unwrap();
3407    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3408
3409    // See that a guest has joined as client A.
3410    cx_a.foreground().run_until_parked();
3411    project_a.read_with(cx_a, |p, _| assert_eq!(p.collaborators().len(), 1));
3412
3413    // Begin opening a buffer as client B, but leave the project before the open completes.
3414    let buffer_b = cx_b
3415        .background()
3416        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx)));
3417    cx_b.update(|_| drop(project_b));
3418    drop(buffer_b);
3419
3420    // See that the guest has left.
3421    cx_a.foreground().run_until_parked();
3422    project_a.read_with(cx_a, |p, _| assert!(p.collaborators().is_empty()));
3423}
3424
3425#[gpui::test(iterations = 10)]
3426async fn test_canceling_buffer_opening(
3427    deterministic: Arc<Deterministic>,
3428    cx_a: &mut TestAppContext,
3429    cx_b: &mut TestAppContext,
3430) {
3431    deterministic.forbid_parking();
3432
3433    let mut server = TestServer::start(&deterministic).await;
3434    let client_a = server.create_client(cx_a, "user_a").await;
3435    let client_b = server.create_client(cx_b, "user_b").await;
3436    server
3437        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3438        .await;
3439    let active_call_a = cx_a.read(ActiveCall::global);
3440
3441    client_a
3442        .fs
3443        .insert_tree(
3444            "/dir",
3445            json!({
3446                "a.txt": "abc",
3447            }),
3448        )
3449        .await;
3450    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
3451    let project_id = active_call_a
3452        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3453        .await
3454        .unwrap();
3455    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3456
3457    let buffer_a = project_a
3458        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "a.txt"), cx))
3459        .await
3460        .unwrap();
3461
3462    // Open a buffer as client B but cancel after a random amount of time.
3463    let buffer_b = project_b.update(cx_b, |p, cx| {
3464        p.open_buffer_by_id(buffer_a.read_with(cx_a, |a, _| a.remote_id()), cx)
3465    });
3466    deterministic.simulate_random_delay().await;
3467    drop(buffer_b);
3468
3469    // Try opening the same buffer again as client B, and ensure we can
3470    // still do it despite the cancellation above.
3471    let buffer_b = project_b
3472        .update(cx_b, |p, cx| {
3473            p.open_buffer_by_id(buffer_a.read_with(cx_a, |a, _| a.remote_id()), cx)
3474        })
3475        .await
3476        .unwrap();
3477    buffer_b.read_with(cx_b, |buf, _| assert_eq!(buf.text(), "abc"));
3478}
3479
3480#[gpui::test(iterations = 10)]
3481async fn test_leaving_project(
3482    deterministic: Arc<Deterministic>,
3483    cx_a: &mut TestAppContext,
3484    cx_b: &mut TestAppContext,
3485    cx_c: &mut TestAppContext,
3486) {
3487    deterministic.forbid_parking();
3488    let mut server = TestServer::start(&deterministic).await;
3489    let client_a = server.create_client(cx_a, "user_a").await;
3490    let client_b = server.create_client(cx_b, "user_b").await;
3491    let client_c = server.create_client(cx_c, "user_c").await;
3492    server
3493        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
3494        .await;
3495    let active_call_a = cx_a.read(ActiveCall::global);
3496
3497    client_a
3498        .fs
3499        .insert_tree(
3500            "/a",
3501            json!({
3502                "a.txt": "a-contents",
3503                "b.txt": "b-contents",
3504            }),
3505        )
3506        .await;
3507    let (project_a, _) = client_a.build_local_project("/a", cx_a).await;
3508    let project_id = active_call_a
3509        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3510        .await
3511        .unwrap();
3512    let project_b1 = client_b.build_remote_project(project_id, cx_b).await;
3513    let project_c = client_c.build_remote_project(project_id, cx_c).await;
3514
3515    // Client A sees that a guest has joined.
3516    deterministic.run_until_parked();
3517    project_a.read_with(cx_a, |project, _| {
3518        assert_eq!(project.collaborators().len(), 2);
3519    });
3520    project_b1.read_with(cx_b, |project, _| {
3521        assert_eq!(project.collaborators().len(), 2);
3522    });
3523    project_c.read_with(cx_c, |project, _| {
3524        assert_eq!(project.collaborators().len(), 2);
3525    });
3526
3527    // Client B opens a buffer.
3528    let buffer_b1 = project_b1
3529        .update(cx_b, |project, cx| {
3530            let worktree_id = project.worktrees(cx).next().unwrap().read(cx).id();
3531            project.open_buffer((worktree_id, "a.txt"), cx)
3532        })
3533        .await
3534        .unwrap();
3535    buffer_b1.read_with(cx_b, |buffer, _| assert_eq!(buffer.text(), "a-contents"));
3536
3537    // Drop client B's project and ensure client A and client C observe client B leaving.
3538    cx_b.update(|_| drop(project_b1));
3539    deterministic.run_until_parked();
3540    project_a.read_with(cx_a, |project, _| {
3541        assert_eq!(project.collaborators().len(), 1);
3542    });
3543    project_c.read_with(cx_c, |project, _| {
3544        assert_eq!(project.collaborators().len(), 1);
3545    });
3546
3547    // Client B re-joins the project and can open buffers as before.
3548    let project_b2 = client_b.build_remote_project(project_id, cx_b).await;
3549    deterministic.run_until_parked();
3550    project_a.read_with(cx_a, |project, _| {
3551        assert_eq!(project.collaborators().len(), 2);
3552    });
3553    project_b2.read_with(cx_b, |project, _| {
3554        assert_eq!(project.collaborators().len(), 2);
3555    });
3556    project_c.read_with(cx_c, |project, _| {
3557        assert_eq!(project.collaborators().len(), 2);
3558    });
3559
3560    let buffer_b2 = project_b2
3561        .update(cx_b, |project, cx| {
3562            let worktree_id = project.worktrees(cx).next().unwrap().read(cx).id();
3563            project.open_buffer((worktree_id, "a.txt"), cx)
3564        })
3565        .await
3566        .unwrap();
3567    buffer_b2.read_with(cx_b, |buffer, _| assert_eq!(buffer.text(), "a-contents"));
3568
3569    // Drop client B's connection and ensure client A and client C observe client B leaving.
3570    client_b.disconnect(&cx_b.to_async());
3571    deterministic.advance_clock(RECONNECT_TIMEOUT);
3572    project_a.read_with(cx_a, |project, _| {
3573        assert_eq!(project.collaborators().len(), 1);
3574    });
3575    project_b2.read_with(cx_b, |project, _| {
3576        assert!(project.is_read_only());
3577    });
3578    project_c.read_with(cx_c, |project, _| {
3579        assert_eq!(project.collaborators().len(), 1);
3580    });
3581
3582    // Client B can't join the project, unless they re-join the room.
3583    cx_b.spawn(|cx| {
3584        Project::remote(
3585            project_id,
3586            client_b.client.clone(),
3587            client_b.user_store.clone(),
3588            client_b.language_registry.clone(),
3589            FakeFs::new(cx.background()),
3590            cx,
3591        )
3592    })
3593    .await
3594    .unwrap_err();
3595
3596    // Simulate connection loss for client C and ensure client A observes client C leaving the project.
3597    client_c.wait_for_current_user(cx_c).await;
3598    server.forbid_connections();
3599    server.disconnect_client(client_c.peer_id().unwrap());
3600    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
3601    deterministic.run_until_parked();
3602    project_a.read_with(cx_a, |project, _| {
3603        assert_eq!(project.collaborators().len(), 0);
3604    });
3605    project_b2.read_with(cx_b, |project, _| {
3606        assert!(project.is_read_only());
3607    });
3608    project_c.read_with(cx_c, |project, _| {
3609        assert!(project.is_read_only());
3610    });
3611}
3612
3613#[gpui::test(iterations = 10)]
3614async fn test_collaborating_with_diagnostics(
3615    deterministic: Arc<Deterministic>,
3616    cx_a: &mut TestAppContext,
3617    cx_b: &mut TestAppContext,
3618    cx_c: &mut TestAppContext,
3619) {
3620    deterministic.forbid_parking();
3621    let mut server = TestServer::start(&deterministic).await;
3622    let client_a = server.create_client(cx_a, "user_a").await;
3623    let client_b = server.create_client(cx_b, "user_b").await;
3624    let client_c = server.create_client(cx_c, "user_c").await;
3625    server
3626        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
3627        .await;
3628    let active_call_a = cx_a.read(ActiveCall::global);
3629
3630    // Set up a fake language server.
3631    let mut language = Language::new(
3632        LanguageConfig {
3633            name: "Rust".into(),
3634            path_suffixes: vec!["rs".to_string()],
3635            ..Default::default()
3636        },
3637        Some(tree_sitter_rust::language()),
3638    );
3639    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
3640    client_a.language_registry.add(Arc::new(language));
3641
3642    // Share a project as client A
3643    client_a
3644        .fs
3645        .insert_tree(
3646            "/a",
3647            json!({
3648                "a.rs": "let one = two",
3649                "other.rs": "",
3650            }),
3651        )
3652        .await;
3653    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
3654
3655    // Cause the language server to start.
3656    let _buffer = project_a
3657        .update(cx_a, |project, cx| {
3658            project.open_buffer(
3659                ProjectPath {
3660                    worktree_id,
3661                    path: Path::new("other.rs").into(),
3662                },
3663                cx,
3664            )
3665        })
3666        .await
3667        .unwrap();
3668
3669    // Simulate a language server reporting errors for a file.
3670    let mut fake_language_server = fake_language_servers.next().await.unwrap();
3671    fake_language_server
3672        .receive_notification::<lsp::notification::DidOpenTextDocument>()
3673        .await;
3674    fake_language_server.notify::<lsp::notification::PublishDiagnostics>(
3675        lsp::PublishDiagnosticsParams {
3676            uri: lsp::Url::from_file_path("/a/a.rs").unwrap(),
3677            version: None,
3678            diagnostics: vec![lsp::Diagnostic {
3679                severity: Some(lsp::DiagnosticSeverity::WARNING),
3680                range: lsp::Range::new(lsp::Position::new(0, 4), lsp::Position::new(0, 7)),
3681                message: "message 0".to_string(),
3682                ..Default::default()
3683            }],
3684        },
3685    );
3686
3687    // Client A shares the project and, simultaneously, the language server
3688    // publishes a diagnostic. This is done to ensure that the server always
3689    // observes the latest diagnostics for a worktree.
3690    let project_id = active_call_a
3691        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3692        .await
3693        .unwrap();
3694    fake_language_server.notify::<lsp::notification::PublishDiagnostics>(
3695        lsp::PublishDiagnosticsParams {
3696            uri: lsp::Url::from_file_path("/a/a.rs").unwrap(),
3697            version: None,
3698            diagnostics: vec![lsp::Diagnostic {
3699                severity: Some(lsp::DiagnosticSeverity::ERROR),
3700                range: lsp::Range::new(lsp::Position::new(0, 4), lsp::Position::new(0, 7)),
3701                message: "message 1".to_string(),
3702                ..Default::default()
3703            }],
3704        },
3705    );
3706
3707    // Join the worktree as client B.
3708    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3709
3710    // Wait for server to see the diagnostics update.
3711    deterministic.run_until_parked();
3712
3713    // Ensure client B observes the new diagnostics.
3714    project_b.read_with(cx_b, |project, cx| {
3715        assert_eq!(
3716            project.diagnostic_summaries(cx).collect::<Vec<_>>(),
3717            &[(
3718                ProjectPath {
3719                    worktree_id,
3720                    path: Arc::from(Path::new("a.rs")),
3721                },
3722                LanguageServerId(0),
3723                DiagnosticSummary {
3724                    error_count: 1,
3725                    warning_count: 0,
3726                    ..Default::default()
3727                },
3728            )]
3729        )
3730    });
3731
3732    // Join project as client C and observe the diagnostics.
3733    let project_c = client_c.build_remote_project(project_id, cx_c).await;
3734    let project_c_diagnostic_summaries =
3735        Rc::new(RefCell::new(project_c.read_with(cx_c, |project, cx| {
3736            project.diagnostic_summaries(cx).collect::<Vec<_>>()
3737        })));
3738    project_c.update(cx_c, |_, cx| {
3739        let summaries = project_c_diagnostic_summaries.clone();
3740        cx.subscribe(&project_c, {
3741            move |p, _, event, cx| {
3742                if let project::Event::DiskBasedDiagnosticsFinished { .. } = event {
3743                    *summaries.borrow_mut() = p.diagnostic_summaries(cx).collect();
3744                }
3745            }
3746        })
3747        .detach();
3748    });
3749
3750    deterministic.run_until_parked();
3751    assert_eq!(
3752        project_c_diagnostic_summaries.borrow().as_slice(),
3753        &[(
3754            ProjectPath {
3755                worktree_id,
3756                path: Arc::from(Path::new("a.rs")),
3757            },
3758            LanguageServerId(0),
3759            DiagnosticSummary {
3760                error_count: 1,
3761                warning_count: 0,
3762                ..Default::default()
3763            },
3764        )]
3765    );
3766
3767    // Simulate a language server reporting more errors for a file.
3768    fake_language_server.notify::<lsp::notification::PublishDiagnostics>(
3769        lsp::PublishDiagnosticsParams {
3770            uri: lsp::Url::from_file_path("/a/a.rs").unwrap(),
3771            version: None,
3772            diagnostics: vec![
3773                lsp::Diagnostic {
3774                    severity: Some(lsp::DiagnosticSeverity::ERROR),
3775                    range: lsp::Range::new(lsp::Position::new(0, 4), lsp::Position::new(0, 7)),
3776                    message: "message 1".to_string(),
3777                    ..Default::default()
3778                },
3779                lsp::Diagnostic {
3780                    severity: Some(lsp::DiagnosticSeverity::WARNING),
3781                    range: lsp::Range::new(lsp::Position::new(0, 10), lsp::Position::new(0, 13)),
3782                    message: "message 2".to_string(),
3783                    ..Default::default()
3784                },
3785            ],
3786        },
3787    );
3788
3789    // Clients B and C get the updated summaries
3790    deterministic.run_until_parked();
3791    project_b.read_with(cx_b, |project, cx| {
3792        assert_eq!(
3793            project.diagnostic_summaries(cx).collect::<Vec<_>>(),
3794            [(
3795                ProjectPath {
3796                    worktree_id,
3797                    path: Arc::from(Path::new("a.rs")),
3798                },
3799                LanguageServerId(0),
3800                DiagnosticSummary {
3801                    error_count: 1,
3802                    warning_count: 1,
3803                },
3804            )]
3805        );
3806    });
3807    project_c.read_with(cx_c, |project, cx| {
3808        assert_eq!(
3809            project.diagnostic_summaries(cx).collect::<Vec<_>>(),
3810            [(
3811                ProjectPath {
3812                    worktree_id,
3813                    path: Arc::from(Path::new("a.rs")),
3814                },
3815                LanguageServerId(0),
3816                DiagnosticSummary {
3817                    error_count: 1,
3818                    warning_count: 1,
3819                },
3820            )]
3821        );
3822    });
3823
3824    // Open the file with the errors on client B. They should be present.
3825    let buffer_b = cx_b
3826        .background()
3827        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx)))
3828        .await
3829        .unwrap();
3830
3831    buffer_b.read_with(cx_b, |buffer, _| {
3832        assert_eq!(
3833            buffer
3834                .snapshot()
3835                .diagnostics_in_range::<_, Point>(0..buffer.len(), false)
3836                .collect::<Vec<_>>(),
3837            &[
3838                DiagnosticEntry {
3839                    range: Point::new(0, 4)..Point::new(0, 7),
3840                    diagnostic: Diagnostic {
3841                        group_id: 2,
3842                        message: "message 1".to_string(),
3843                        severity: lsp::DiagnosticSeverity::ERROR,
3844                        is_primary: true,
3845                        ..Default::default()
3846                    }
3847                },
3848                DiagnosticEntry {
3849                    range: Point::new(0, 10)..Point::new(0, 13),
3850                    diagnostic: Diagnostic {
3851                        group_id: 3,
3852                        severity: lsp::DiagnosticSeverity::WARNING,
3853                        message: "message 2".to_string(),
3854                        is_primary: true,
3855                        ..Default::default()
3856                    }
3857                }
3858            ]
3859        );
3860    });
3861
3862    // Simulate a language server reporting no errors for a file.
3863    fake_language_server.notify::<lsp::notification::PublishDiagnostics>(
3864        lsp::PublishDiagnosticsParams {
3865            uri: lsp::Url::from_file_path("/a/a.rs").unwrap(),
3866            version: None,
3867            diagnostics: vec![],
3868        },
3869    );
3870    deterministic.run_until_parked();
3871    project_a.read_with(cx_a, |project, cx| {
3872        assert_eq!(project.diagnostic_summaries(cx).collect::<Vec<_>>(), [])
3873    });
3874    project_b.read_with(cx_b, |project, cx| {
3875        assert_eq!(project.diagnostic_summaries(cx).collect::<Vec<_>>(), [])
3876    });
3877    project_c.read_with(cx_c, |project, cx| {
3878        assert_eq!(project.diagnostic_summaries(cx).collect::<Vec<_>>(), [])
3879    });
3880}
3881
3882#[gpui::test(iterations = 10)]
3883async fn test_collaborating_with_lsp_progress_updates_and_diagnostics_ordering(
3884    deterministic: Arc<Deterministic>,
3885    cx_a: &mut TestAppContext,
3886    cx_b: &mut TestAppContext,
3887) {
3888    deterministic.forbid_parking();
3889    let mut server = TestServer::start(&deterministic).await;
3890    let client_a = server.create_client(cx_a, "user_a").await;
3891    let client_b = server.create_client(cx_b, "user_b").await;
3892    server
3893        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
3894        .await;
3895
3896    // Set up a fake language server.
3897    let mut language = Language::new(
3898        LanguageConfig {
3899            name: "Rust".into(),
3900            path_suffixes: vec!["rs".to_string()],
3901            ..Default::default()
3902        },
3903        Some(tree_sitter_rust::language()),
3904    );
3905    let mut fake_language_servers = language
3906        .set_fake_lsp_adapter(Arc::new(FakeLspAdapter {
3907            disk_based_diagnostics_progress_token: Some("the-disk-based-token".into()),
3908            disk_based_diagnostics_sources: vec!["the-disk-based-diagnostics-source".into()],
3909            ..Default::default()
3910        }))
3911        .await;
3912    client_a.language_registry.add(Arc::new(language));
3913
3914    let file_names = &["one.rs", "two.rs", "three.rs", "four.rs", "five.rs"];
3915    client_a
3916        .fs
3917        .insert_tree(
3918            "/test",
3919            json!({
3920                "one.rs": "const ONE: usize = 1;",
3921                "two.rs": "const TWO: usize = 2;",
3922                "three.rs": "const THREE: usize = 3;",
3923                "four.rs": "const FOUR: usize = 3;",
3924                "five.rs": "const FIVE: usize = 3;",
3925            }),
3926        )
3927        .await;
3928
3929    let (project_a, worktree_id) = client_a.build_local_project("/test", cx_a).await;
3930
3931    // Share a project as client A
3932    let active_call_a = cx_a.read(ActiveCall::global);
3933    let project_id = active_call_a
3934        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
3935        .await
3936        .unwrap();
3937
3938    // Join the project as client B and open all three files.
3939    let project_b = client_b.build_remote_project(project_id, cx_b).await;
3940    let guest_buffers = futures::future::try_join_all(file_names.iter().map(|file_name| {
3941        project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, file_name), cx))
3942    }))
3943    .await
3944    .unwrap();
3945
3946    // Simulate a language server reporting errors for a file.
3947    let fake_language_server = fake_language_servers.next().await.unwrap();
3948    fake_language_server
3949        .request::<lsp::request::WorkDoneProgressCreate>(lsp::WorkDoneProgressCreateParams {
3950            token: lsp::NumberOrString::String("the-disk-based-token".to_string()),
3951        })
3952        .await
3953        .unwrap();
3954    fake_language_server.notify::<lsp::notification::Progress>(lsp::ProgressParams {
3955        token: lsp::NumberOrString::String("the-disk-based-token".to_string()),
3956        value: lsp::ProgressParamsValue::WorkDone(lsp::WorkDoneProgress::Begin(
3957            lsp::WorkDoneProgressBegin {
3958                title: "Progress Began".into(),
3959                ..Default::default()
3960            },
3961        )),
3962    });
3963    for file_name in file_names {
3964        fake_language_server.notify::<lsp::notification::PublishDiagnostics>(
3965            lsp::PublishDiagnosticsParams {
3966                uri: lsp::Url::from_file_path(Path::new("/test").join(file_name)).unwrap(),
3967                version: None,
3968                diagnostics: vec![lsp::Diagnostic {
3969                    severity: Some(lsp::DiagnosticSeverity::WARNING),
3970                    source: Some("the-disk-based-diagnostics-source".into()),
3971                    range: lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
3972                    message: "message one".to_string(),
3973                    ..Default::default()
3974                }],
3975            },
3976        );
3977    }
3978    fake_language_server.notify::<lsp::notification::Progress>(lsp::ProgressParams {
3979        token: lsp::NumberOrString::String("the-disk-based-token".to_string()),
3980        value: lsp::ProgressParamsValue::WorkDone(lsp::WorkDoneProgress::End(
3981            lsp::WorkDoneProgressEnd { message: None },
3982        )),
3983    });
3984
3985    // When the "disk base diagnostics finished" message is received, the buffers'
3986    // diagnostics are expected to be present.
3987    let disk_based_diagnostics_finished = Arc::new(AtomicBool::new(false));
3988    project_b.update(cx_b, {
3989        let project_b = project_b.clone();
3990        let disk_based_diagnostics_finished = disk_based_diagnostics_finished.clone();
3991        move |_, cx| {
3992            cx.subscribe(&project_b, move |_, _, event, cx| {
3993                if let project::Event::DiskBasedDiagnosticsFinished { .. } = event {
3994                    disk_based_diagnostics_finished.store(true, SeqCst);
3995                    for buffer in &guest_buffers {
3996                        assert_eq!(
3997                            buffer
3998                                .read(cx)
3999                                .snapshot()
4000                                .diagnostics_in_range::<_, usize>(0..5, false)
4001                                .count(),
4002                            1,
4003                            "expected a diagnostic for buffer {:?}",
4004                            buffer.read(cx).file().unwrap().path(),
4005                        );
4006                    }
4007                }
4008            })
4009            .detach();
4010        }
4011    });
4012
4013    deterministic.run_until_parked();
4014    assert!(disk_based_diagnostics_finished.load(SeqCst));
4015}
4016
4017#[gpui::test(iterations = 10)]
4018async fn test_collaborating_with_completion(
4019    deterministic: Arc<Deterministic>,
4020    cx_a: &mut TestAppContext,
4021    cx_b: &mut TestAppContext,
4022) {
4023    deterministic.forbid_parking();
4024    let mut server = TestServer::start(&deterministic).await;
4025    let client_a = server.create_client(cx_a, "user_a").await;
4026    let client_b = server.create_client(cx_b, "user_b").await;
4027    server
4028        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4029        .await;
4030    let active_call_a = cx_a.read(ActiveCall::global);
4031
4032    // Set up a fake language server.
4033    let mut language = Language::new(
4034        LanguageConfig {
4035            name: "Rust".into(),
4036            path_suffixes: vec!["rs".to_string()],
4037            ..Default::default()
4038        },
4039        Some(tree_sitter_rust::language()),
4040    );
4041    let mut fake_language_servers = language
4042        .set_fake_lsp_adapter(Arc::new(FakeLspAdapter {
4043            capabilities: lsp::ServerCapabilities {
4044                completion_provider: Some(lsp::CompletionOptions {
4045                    trigger_characters: Some(vec![".".to_string()]),
4046                    ..Default::default()
4047                }),
4048                ..Default::default()
4049            },
4050            ..Default::default()
4051        }))
4052        .await;
4053    client_a.language_registry.add(Arc::new(language));
4054
4055    client_a
4056        .fs
4057        .insert_tree(
4058            "/a",
4059            json!({
4060                "main.rs": "fn main() { a }",
4061                "other.rs": "",
4062            }),
4063        )
4064        .await;
4065    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
4066    let project_id = active_call_a
4067        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4068        .await
4069        .unwrap();
4070    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4071
4072    // Open a file in an editor as the guest.
4073    let buffer_b = project_b
4074        .update(cx_b, |p, cx| p.open_buffer((worktree_id, "main.rs"), cx))
4075        .await
4076        .unwrap();
4077    let (window_b, _) = cx_b.add_window(|_| EmptyView);
4078    let editor_b = cx_b.add_view(window_b, |cx| {
4079        Editor::for_buffer(buffer_b.clone(), Some(project_b.clone()), cx)
4080    });
4081
4082    let fake_language_server = fake_language_servers.next().await.unwrap();
4083    cx_a.foreground().run_until_parked();
4084    buffer_b.read_with(cx_b, |buffer, _| {
4085        assert!(!buffer.completion_triggers().is_empty())
4086    });
4087
4088    // Type a completion trigger character as the guest.
4089    editor_b.update(cx_b, |editor, cx| {
4090        editor.change_selections(None, cx, |s| s.select_ranges([13..13]));
4091        editor.handle_input(".", cx);
4092        cx.focus(&editor_b);
4093    });
4094
4095    // Receive a completion request as the host's language server.
4096    // Return some completions from the host's language server.
4097    cx_a.foreground().start_waiting();
4098    fake_language_server
4099        .handle_request::<lsp::request::Completion, _, _>(|params, _| async move {
4100            assert_eq!(
4101                params.text_document_position.text_document.uri,
4102                lsp::Url::from_file_path("/a/main.rs").unwrap(),
4103            );
4104            assert_eq!(
4105                params.text_document_position.position,
4106                lsp::Position::new(0, 14),
4107            );
4108
4109            Ok(Some(lsp::CompletionResponse::Array(vec![
4110                lsp::CompletionItem {
4111                    label: "first_method(…)".into(),
4112                    detail: Some("fn(&mut self, B) -> C".into()),
4113                    text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
4114                        new_text: "first_method($1)".to_string(),
4115                        range: lsp::Range::new(
4116                            lsp::Position::new(0, 14),
4117                            lsp::Position::new(0, 14),
4118                        ),
4119                    })),
4120                    insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
4121                    ..Default::default()
4122                },
4123                lsp::CompletionItem {
4124                    label: "second_method(…)".into(),
4125                    detail: Some("fn(&mut self, C) -> D<E>".into()),
4126                    text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
4127                        new_text: "second_method()".to_string(),
4128                        range: lsp::Range::new(
4129                            lsp::Position::new(0, 14),
4130                            lsp::Position::new(0, 14),
4131                        ),
4132                    })),
4133                    insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
4134                    ..Default::default()
4135                },
4136            ])))
4137        })
4138        .next()
4139        .await
4140        .unwrap();
4141    cx_a.foreground().finish_waiting();
4142
4143    // Open the buffer on the host.
4144    let buffer_a = project_a
4145        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "main.rs"), cx))
4146        .await
4147        .unwrap();
4148    cx_a.foreground().run_until_parked();
4149    buffer_a.read_with(cx_a, |buffer, _| {
4150        assert_eq!(buffer.text(), "fn main() { a. }")
4151    });
4152
4153    // Confirm a completion on the guest.
4154    editor_b.read_with(cx_b, |editor, _| assert!(editor.context_menu_visible()));
4155    editor_b.update(cx_b, |editor, cx| {
4156        editor.confirm_completion(&ConfirmCompletion { item_ix: Some(0) }, cx);
4157        assert_eq!(editor.text(cx), "fn main() { a.first_method() }");
4158    });
4159
4160    // Return a resolved completion from the host's language server.
4161    // The resolved completion has an additional text edit.
4162    fake_language_server.handle_request::<lsp::request::ResolveCompletionItem, _, _>(
4163        |params, _| async move {
4164            assert_eq!(params.label, "first_method(…)");
4165            Ok(lsp::CompletionItem {
4166                label: "first_method(…)".into(),
4167                detail: Some("fn(&mut self, B) -> C".into()),
4168                text_edit: Some(lsp::CompletionTextEdit::Edit(lsp::TextEdit {
4169                    new_text: "first_method($1)".to_string(),
4170                    range: lsp::Range::new(lsp::Position::new(0, 14), lsp::Position::new(0, 14)),
4171                })),
4172                additional_text_edits: Some(vec![lsp::TextEdit {
4173                    new_text: "use d::SomeTrait;\n".to_string(),
4174                    range: lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 0)),
4175                }]),
4176                insert_text_format: Some(lsp::InsertTextFormat::SNIPPET),
4177                ..Default::default()
4178            })
4179        },
4180    );
4181
4182    // The additional edit is applied.
4183    cx_a.foreground().run_until_parked();
4184    buffer_a.read_with(cx_a, |buffer, _| {
4185        assert_eq!(
4186            buffer.text(),
4187            "use d::SomeTrait;\nfn main() { a.first_method() }"
4188        );
4189    });
4190    buffer_b.read_with(cx_b, |buffer, _| {
4191        assert_eq!(
4192            buffer.text(),
4193            "use d::SomeTrait;\nfn main() { a.first_method() }"
4194        );
4195    });
4196}
4197
4198#[gpui::test(iterations = 10)]
4199async fn test_reloading_buffer_manually(
4200    deterministic: Arc<Deterministic>,
4201    cx_a: &mut TestAppContext,
4202    cx_b: &mut TestAppContext,
4203) {
4204    deterministic.forbid_parking();
4205    let mut server = TestServer::start(&deterministic).await;
4206    let client_a = server.create_client(cx_a, "user_a").await;
4207    let client_b = server.create_client(cx_b, "user_b").await;
4208    server
4209        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4210        .await;
4211    let active_call_a = cx_a.read(ActiveCall::global);
4212
4213    client_a
4214        .fs
4215        .insert_tree("/a", json!({ "a.rs": "let one = 1;" }))
4216        .await;
4217    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
4218    let buffer_a = project_a
4219        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx))
4220        .await
4221        .unwrap();
4222    let project_id = active_call_a
4223        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4224        .await
4225        .unwrap();
4226
4227    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4228
4229    let buffer_b = cx_b
4230        .background()
4231        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx)))
4232        .await
4233        .unwrap();
4234    buffer_b.update(cx_b, |buffer, cx| {
4235        buffer.edit([(4..7, "six")], None, cx);
4236        buffer.edit([(10..11, "6")], None, cx);
4237        assert_eq!(buffer.text(), "let six = 6;");
4238        assert!(buffer.is_dirty());
4239        assert!(!buffer.has_conflict());
4240    });
4241    cx_a.foreground().run_until_parked();
4242    buffer_a.read_with(cx_a, |buffer, _| assert_eq!(buffer.text(), "let six = 6;"));
4243
4244    client_a
4245        .fs
4246        .save(
4247            "/a/a.rs".as_ref(),
4248            &Rope::from("let seven = 7;"),
4249            LineEnding::Unix,
4250        )
4251        .await
4252        .unwrap();
4253    cx_a.foreground().run_until_parked();
4254    buffer_a.read_with(cx_a, |buffer, _| assert!(buffer.has_conflict()));
4255    buffer_b.read_with(cx_b, |buffer, _| assert!(buffer.has_conflict()));
4256
4257    project_b
4258        .update(cx_b, |project, cx| {
4259            project.reload_buffers(HashSet::from_iter([buffer_b.clone()]), true, cx)
4260        })
4261        .await
4262        .unwrap();
4263    buffer_a.read_with(cx_a, |buffer, _| {
4264        assert_eq!(buffer.text(), "let seven = 7;");
4265        assert!(!buffer.is_dirty());
4266        assert!(!buffer.has_conflict());
4267    });
4268    buffer_b.read_with(cx_b, |buffer, _| {
4269        assert_eq!(buffer.text(), "let seven = 7;");
4270        assert!(!buffer.is_dirty());
4271        assert!(!buffer.has_conflict());
4272    });
4273
4274    buffer_a.update(cx_a, |buffer, cx| {
4275        // Undoing on the host is a no-op when the reload was initiated by the guest.
4276        buffer.undo(cx);
4277        assert_eq!(buffer.text(), "let seven = 7;");
4278        assert!(!buffer.is_dirty());
4279        assert!(!buffer.has_conflict());
4280    });
4281    buffer_b.update(cx_b, |buffer, cx| {
4282        // Undoing on the guest rolls back the buffer to before it was reloaded but the conflict gets cleared.
4283        buffer.undo(cx);
4284        assert_eq!(buffer.text(), "let six = 6;");
4285        assert!(buffer.is_dirty());
4286        assert!(!buffer.has_conflict());
4287    });
4288}
4289
4290#[gpui::test(iterations = 10)]
4291async fn test_formatting_buffer(
4292    deterministic: Arc<Deterministic>,
4293    cx_a: &mut TestAppContext,
4294    cx_b: &mut TestAppContext,
4295) {
4296    use project::FormatTrigger;
4297
4298    let mut server = TestServer::start(&deterministic).await;
4299    let client_a = server.create_client(cx_a, "user_a").await;
4300    let client_b = server.create_client(cx_b, "user_b").await;
4301    server
4302        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4303        .await;
4304    let active_call_a = cx_a.read(ActiveCall::global);
4305
4306    // Set up a fake language server.
4307    let mut language = Language::new(
4308        LanguageConfig {
4309            name: "Rust".into(),
4310            path_suffixes: vec!["rs".to_string()],
4311            ..Default::default()
4312        },
4313        Some(tree_sitter_rust::language()),
4314    );
4315    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4316    client_a.language_registry.add(Arc::new(language));
4317
4318    // Here we insert a fake tree with a directory that exists on disk. This is needed
4319    // because later we'll invoke a command, which requires passing a working directory
4320    // that points to a valid location on disk.
4321    let directory = env::current_dir().unwrap();
4322    client_a
4323        .fs
4324        .insert_tree(&directory, json!({ "a.rs": "let one = \"two\"" }))
4325        .await;
4326    let (project_a, worktree_id) = client_a.build_local_project(&directory, cx_a).await;
4327    let project_id = active_call_a
4328        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4329        .await
4330        .unwrap();
4331    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4332
4333    let buffer_b = cx_b
4334        .background()
4335        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx)))
4336        .await
4337        .unwrap();
4338
4339    let fake_language_server = fake_language_servers.next().await.unwrap();
4340    fake_language_server.handle_request::<lsp::request::Formatting, _, _>(|_, _| async move {
4341        Ok(Some(vec![
4342            lsp::TextEdit {
4343                range: lsp::Range::new(lsp::Position::new(0, 4), lsp::Position::new(0, 4)),
4344                new_text: "h".to_string(),
4345            },
4346            lsp::TextEdit {
4347                range: lsp::Range::new(lsp::Position::new(0, 7), lsp::Position::new(0, 7)),
4348                new_text: "y".to_string(),
4349            },
4350        ]))
4351    });
4352
4353    project_b
4354        .update(cx_b, |project, cx| {
4355            project.format(
4356                HashSet::from_iter([buffer_b.clone()]),
4357                true,
4358                FormatTrigger::Save,
4359                cx,
4360            )
4361        })
4362        .await
4363        .unwrap();
4364
4365    // The edits from the LSP are applied, and a final newline is added.
4366    assert_eq!(
4367        buffer_b.read_with(cx_b, |buffer, _| buffer.text()),
4368        "let honey = \"two\"\n"
4369    );
4370
4371    // Ensure buffer can be formatted using an external command. Notice how the
4372    // host's configuration is honored as opposed to using the guest's settings.
4373    cx_a.update(|cx| {
4374        cx.update_global(|store: &mut SettingsStore, cx| {
4375            store.update_user_settings::<AllLanguageSettings>(cx, |file| {
4376                file.defaults.formatter = Some(Formatter::External {
4377                    command: "awk".into(),
4378                    arguments: vec!["{sub(/two/,\"{buffer_path}\")}1".to_string()].into(),
4379                });
4380            });
4381        });
4382    });
4383    project_b
4384        .update(cx_b, |project, cx| {
4385            project.format(
4386                HashSet::from_iter([buffer_b.clone()]),
4387                true,
4388                FormatTrigger::Save,
4389                cx,
4390            )
4391        })
4392        .await
4393        .unwrap();
4394    assert_eq!(
4395        buffer_b.read_with(cx_b, |buffer, _| buffer.text()),
4396        format!("let honey = \"{}/a.rs\"\n", directory.to_str().unwrap())
4397    );
4398}
4399
4400#[gpui::test(iterations = 10)]
4401async fn test_definition(
4402    deterministic: Arc<Deterministic>,
4403    cx_a: &mut TestAppContext,
4404    cx_b: &mut TestAppContext,
4405) {
4406    deterministic.forbid_parking();
4407    let mut server = TestServer::start(&deterministic).await;
4408    let client_a = server.create_client(cx_a, "user_a").await;
4409    let client_b = server.create_client(cx_b, "user_b").await;
4410    server
4411        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4412        .await;
4413    let active_call_a = cx_a.read(ActiveCall::global);
4414
4415    // Set up a fake language server.
4416    let mut language = Language::new(
4417        LanguageConfig {
4418            name: "Rust".into(),
4419            path_suffixes: vec!["rs".to_string()],
4420            ..Default::default()
4421        },
4422        Some(tree_sitter_rust::language()),
4423    );
4424    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4425    client_a.language_registry.add(Arc::new(language));
4426
4427    client_a
4428        .fs
4429        .insert_tree(
4430            "/root",
4431            json!({
4432                "dir-1": {
4433                    "a.rs": "const ONE: usize = b::TWO + b::THREE;",
4434                },
4435                "dir-2": {
4436                    "b.rs": "const TWO: c::T2 = 2;\nconst THREE: usize = 3;",
4437                    "c.rs": "type T2 = usize;",
4438                }
4439            }),
4440        )
4441        .await;
4442    let (project_a, worktree_id) = client_a.build_local_project("/root/dir-1", cx_a).await;
4443    let project_id = active_call_a
4444        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4445        .await
4446        .unwrap();
4447    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4448
4449    // Open the file on client B.
4450    let buffer_b = cx_b
4451        .background()
4452        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx)))
4453        .await
4454        .unwrap();
4455
4456    // Request the definition of a symbol as the guest.
4457    let fake_language_server = fake_language_servers.next().await.unwrap();
4458    fake_language_server.handle_request::<lsp::request::GotoDefinition, _, _>(|_, _| async move {
4459        Ok(Some(lsp::GotoDefinitionResponse::Scalar(
4460            lsp::Location::new(
4461                lsp::Url::from_file_path("/root/dir-2/b.rs").unwrap(),
4462                lsp::Range::new(lsp::Position::new(0, 6), lsp::Position::new(0, 9)),
4463            ),
4464        )))
4465    });
4466
4467    let definitions_1 = project_b
4468        .update(cx_b, |p, cx| p.definition(&buffer_b, 23, cx))
4469        .await
4470        .unwrap();
4471    cx_b.read(|cx| {
4472        assert_eq!(definitions_1.len(), 1);
4473        assert_eq!(project_b.read(cx).worktrees(cx).count(), 2);
4474        let target_buffer = definitions_1[0].target.buffer.read(cx);
4475        assert_eq!(
4476            target_buffer.text(),
4477            "const TWO: c::T2 = 2;\nconst THREE: usize = 3;"
4478        );
4479        assert_eq!(
4480            definitions_1[0].target.range.to_point(target_buffer),
4481            Point::new(0, 6)..Point::new(0, 9)
4482        );
4483    });
4484
4485    // Try getting more definitions for the same buffer, ensuring the buffer gets reused from
4486    // the previous call to `definition`.
4487    fake_language_server.handle_request::<lsp::request::GotoDefinition, _, _>(|_, _| async move {
4488        Ok(Some(lsp::GotoDefinitionResponse::Scalar(
4489            lsp::Location::new(
4490                lsp::Url::from_file_path("/root/dir-2/b.rs").unwrap(),
4491                lsp::Range::new(lsp::Position::new(1, 6), lsp::Position::new(1, 11)),
4492            ),
4493        )))
4494    });
4495
4496    let definitions_2 = project_b
4497        .update(cx_b, |p, cx| p.definition(&buffer_b, 33, cx))
4498        .await
4499        .unwrap();
4500    cx_b.read(|cx| {
4501        assert_eq!(definitions_2.len(), 1);
4502        assert_eq!(project_b.read(cx).worktrees(cx).count(), 2);
4503        let target_buffer = definitions_2[0].target.buffer.read(cx);
4504        assert_eq!(
4505            target_buffer.text(),
4506            "const TWO: c::T2 = 2;\nconst THREE: usize = 3;"
4507        );
4508        assert_eq!(
4509            definitions_2[0].target.range.to_point(target_buffer),
4510            Point::new(1, 6)..Point::new(1, 11)
4511        );
4512    });
4513    assert_eq!(
4514        definitions_1[0].target.buffer,
4515        definitions_2[0].target.buffer
4516    );
4517
4518    fake_language_server.handle_request::<lsp::request::GotoTypeDefinition, _, _>(
4519        |req, _| async move {
4520            assert_eq!(
4521                req.text_document_position_params.position,
4522                lsp::Position::new(0, 7)
4523            );
4524            Ok(Some(lsp::GotoDefinitionResponse::Scalar(
4525                lsp::Location::new(
4526                    lsp::Url::from_file_path("/root/dir-2/c.rs").unwrap(),
4527                    lsp::Range::new(lsp::Position::new(0, 5), lsp::Position::new(0, 7)),
4528                ),
4529            )))
4530        },
4531    );
4532
4533    let type_definitions = project_b
4534        .update(cx_b, |p, cx| p.type_definition(&buffer_b, 7, cx))
4535        .await
4536        .unwrap();
4537    cx_b.read(|cx| {
4538        assert_eq!(type_definitions.len(), 1);
4539        let target_buffer = type_definitions[0].target.buffer.read(cx);
4540        assert_eq!(target_buffer.text(), "type T2 = usize;");
4541        assert_eq!(
4542            type_definitions[0].target.range.to_point(target_buffer),
4543            Point::new(0, 5)..Point::new(0, 7)
4544        );
4545    });
4546}
4547
4548#[gpui::test(iterations = 10)]
4549async fn test_references(
4550    deterministic: Arc<Deterministic>,
4551    cx_a: &mut TestAppContext,
4552    cx_b: &mut TestAppContext,
4553) {
4554    deterministic.forbid_parking();
4555    let mut server = TestServer::start(&deterministic).await;
4556    let client_a = server.create_client(cx_a, "user_a").await;
4557    let client_b = server.create_client(cx_b, "user_b").await;
4558    server
4559        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4560        .await;
4561    let active_call_a = cx_a.read(ActiveCall::global);
4562
4563    // Set up a fake language server.
4564    let mut language = Language::new(
4565        LanguageConfig {
4566            name: "Rust".into(),
4567            path_suffixes: vec!["rs".to_string()],
4568            ..Default::default()
4569        },
4570        Some(tree_sitter_rust::language()),
4571    );
4572    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4573    client_a.language_registry.add(Arc::new(language));
4574
4575    client_a
4576        .fs
4577        .insert_tree(
4578            "/root",
4579            json!({
4580                "dir-1": {
4581                    "one.rs": "const ONE: usize = 1;",
4582                    "two.rs": "const TWO: usize = one::ONE + one::ONE;",
4583                },
4584                "dir-2": {
4585                    "three.rs": "const THREE: usize = two::TWO + one::ONE;",
4586                }
4587            }),
4588        )
4589        .await;
4590    let (project_a, worktree_id) = client_a.build_local_project("/root/dir-1", cx_a).await;
4591    let project_id = active_call_a
4592        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4593        .await
4594        .unwrap();
4595    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4596
4597    // Open the file on client B.
4598    let buffer_b = cx_b
4599        .background()
4600        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "one.rs"), cx)))
4601        .await
4602        .unwrap();
4603
4604    // Request references to a symbol as the guest.
4605    let fake_language_server = fake_language_servers.next().await.unwrap();
4606    fake_language_server.handle_request::<lsp::request::References, _, _>(|params, _| async move {
4607        assert_eq!(
4608            params.text_document_position.text_document.uri.as_str(),
4609            "file:///root/dir-1/one.rs"
4610        );
4611        Ok(Some(vec![
4612            lsp::Location {
4613                uri: lsp::Url::from_file_path("/root/dir-1/two.rs").unwrap(),
4614                range: lsp::Range::new(lsp::Position::new(0, 24), lsp::Position::new(0, 27)),
4615            },
4616            lsp::Location {
4617                uri: lsp::Url::from_file_path("/root/dir-1/two.rs").unwrap(),
4618                range: lsp::Range::new(lsp::Position::new(0, 35), lsp::Position::new(0, 38)),
4619            },
4620            lsp::Location {
4621                uri: lsp::Url::from_file_path("/root/dir-2/three.rs").unwrap(),
4622                range: lsp::Range::new(lsp::Position::new(0, 37), lsp::Position::new(0, 40)),
4623            },
4624        ]))
4625    });
4626
4627    let references = project_b
4628        .update(cx_b, |p, cx| p.references(&buffer_b, 7, cx))
4629        .await
4630        .unwrap();
4631    cx_b.read(|cx| {
4632        assert_eq!(references.len(), 3);
4633        assert_eq!(project_b.read(cx).worktrees(cx).count(), 2);
4634
4635        let two_buffer = references[0].buffer.read(cx);
4636        let three_buffer = references[2].buffer.read(cx);
4637        assert_eq!(
4638            two_buffer.file().unwrap().path().as_ref(),
4639            Path::new("two.rs")
4640        );
4641        assert_eq!(references[1].buffer, references[0].buffer);
4642        assert_eq!(
4643            three_buffer.file().unwrap().full_path(cx),
4644            Path::new("/root/dir-2/three.rs")
4645        );
4646
4647        assert_eq!(references[0].range.to_offset(two_buffer), 24..27);
4648        assert_eq!(references[1].range.to_offset(two_buffer), 35..38);
4649        assert_eq!(references[2].range.to_offset(three_buffer), 37..40);
4650    });
4651}
4652
4653#[gpui::test(iterations = 10)]
4654async fn test_project_search(
4655    deterministic: Arc<Deterministic>,
4656    cx_a: &mut TestAppContext,
4657    cx_b: &mut TestAppContext,
4658) {
4659    deterministic.forbid_parking();
4660    let mut server = TestServer::start(&deterministic).await;
4661    let client_a = server.create_client(cx_a, "user_a").await;
4662    let client_b = server.create_client(cx_b, "user_b").await;
4663    server
4664        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4665        .await;
4666    let active_call_a = cx_a.read(ActiveCall::global);
4667
4668    client_a
4669        .fs
4670        .insert_tree(
4671            "/root",
4672            json!({
4673                "dir-1": {
4674                    "a": "hello world",
4675                    "b": "goodnight moon",
4676                    "c": "a world of goo",
4677                    "d": "world champion of clown world",
4678                },
4679                "dir-2": {
4680                    "e": "disney world is fun",
4681                }
4682            }),
4683        )
4684        .await;
4685    let (project_a, _) = client_a.build_local_project("/root/dir-1", cx_a).await;
4686    let (worktree_2, _) = project_a
4687        .update(cx_a, |p, cx| {
4688            p.find_or_create_local_worktree("/root/dir-2", true, cx)
4689        })
4690        .await
4691        .unwrap();
4692    worktree_2
4693        .read_with(cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
4694        .await;
4695    let project_id = active_call_a
4696        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4697        .await
4698        .unwrap();
4699
4700    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4701
4702    // Perform a search as the guest.
4703    let results = project_b
4704        .update(cx_b, |project, cx| {
4705            project.search(
4706                SearchQuery::text("world", false, false, Vec::new(), Vec::new()),
4707                cx,
4708            )
4709        })
4710        .await
4711        .unwrap();
4712
4713    let mut ranges_by_path = results
4714        .into_iter()
4715        .map(|(buffer, ranges)| {
4716            buffer.read_with(cx_b, |buffer, cx| {
4717                let path = buffer.file().unwrap().full_path(cx);
4718                let offset_ranges = ranges
4719                    .into_iter()
4720                    .map(|range| range.to_offset(buffer))
4721                    .collect::<Vec<_>>();
4722                (path, offset_ranges)
4723            })
4724        })
4725        .collect::<Vec<_>>();
4726    ranges_by_path.sort_by_key(|(path, _)| path.clone());
4727
4728    assert_eq!(
4729        ranges_by_path,
4730        &[
4731            (PathBuf::from("dir-1/a"), vec![6..11]),
4732            (PathBuf::from("dir-1/c"), vec![2..7]),
4733            (PathBuf::from("dir-1/d"), vec![0..5, 24..29]),
4734            (PathBuf::from("dir-2/e"), vec![7..12]),
4735        ]
4736    );
4737}
4738
4739#[gpui::test(iterations = 10)]
4740async fn test_document_highlights(
4741    deterministic: Arc<Deterministic>,
4742    cx_a: &mut TestAppContext,
4743    cx_b: &mut TestAppContext,
4744) {
4745    deterministic.forbid_parking();
4746    let mut server = TestServer::start(&deterministic).await;
4747    let client_a = server.create_client(cx_a, "user_a").await;
4748    let client_b = server.create_client(cx_b, "user_b").await;
4749    server
4750        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4751        .await;
4752    let active_call_a = cx_a.read(ActiveCall::global);
4753
4754    client_a
4755        .fs
4756        .insert_tree(
4757            "/root-1",
4758            json!({
4759                "main.rs": "fn double(number: i32) -> i32 { number + number }",
4760            }),
4761        )
4762        .await;
4763
4764    // Set up a fake language server.
4765    let mut language = Language::new(
4766        LanguageConfig {
4767            name: "Rust".into(),
4768            path_suffixes: vec!["rs".to_string()],
4769            ..Default::default()
4770        },
4771        Some(tree_sitter_rust::language()),
4772    );
4773    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4774    client_a.language_registry.add(Arc::new(language));
4775
4776    let (project_a, worktree_id) = client_a.build_local_project("/root-1", cx_a).await;
4777    let project_id = active_call_a
4778        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4779        .await
4780        .unwrap();
4781    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4782
4783    // Open the file on client B.
4784    let buffer_b = cx_b
4785        .background()
4786        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "main.rs"), cx)))
4787        .await
4788        .unwrap();
4789
4790    // Request document highlights as the guest.
4791    let fake_language_server = fake_language_servers.next().await.unwrap();
4792    fake_language_server.handle_request::<lsp::request::DocumentHighlightRequest, _, _>(
4793        |params, _| async move {
4794            assert_eq!(
4795                params
4796                    .text_document_position_params
4797                    .text_document
4798                    .uri
4799                    .as_str(),
4800                "file:///root-1/main.rs"
4801            );
4802            assert_eq!(
4803                params.text_document_position_params.position,
4804                lsp::Position::new(0, 34)
4805            );
4806            Ok(Some(vec![
4807                lsp::DocumentHighlight {
4808                    kind: Some(lsp::DocumentHighlightKind::WRITE),
4809                    range: lsp::Range::new(lsp::Position::new(0, 10), lsp::Position::new(0, 16)),
4810                },
4811                lsp::DocumentHighlight {
4812                    kind: Some(lsp::DocumentHighlightKind::READ),
4813                    range: lsp::Range::new(lsp::Position::new(0, 32), lsp::Position::new(0, 38)),
4814                },
4815                lsp::DocumentHighlight {
4816                    kind: Some(lsp::DocumentHighlightKind::READ),
4817                    range: lsp::Range::new(lsp::Position::new(0, 41), lsp::Position::new(0, 47)),
4818                },
4819            ]))
4820        },
4821    );
4822
4823    let highlights = project_b
4824        .update(cx_b, |p, cx| p.document_highlights(&buffer_b, 34, cx))
4825        .await
4826        .unwrap();
4827    buffer_b.read_with(cx_b, |buffer, _| {
4828        let snapshot = buffer.snapshot();
4829
4830        let highlights = highlights
4831            .into_iter()
4832            .map(|highlight| (highlight.kind, highlight.range.to_offset(&snapshot)))
4833            .collect::<Vec<_>>();
4834        assert_eq!(
4835            highlights,
4836            &[
4837                (lsp::DocumentHighlightKind::WRITE, 10..16),
4838                (lsp::DocumentHighlightKind::READ, 32..38),
4839                (lsp::DocumentHighlightKind::READ, 41..47)
4840            ]
4841        )
4842    });
4843}
4844
4845#[gpui::test(iterations = 10)]
4846async fn test_lsp_hover(
4847    deterministic: Arc<Deterministic>,
4848    cx_a: &mut TestAppContext,
4849    cx_b: &mut TestAppContext,
4850) {
4851    deterministic.forbid_parking();
4852    let mut server = TestServer::start(&deterministic).await;
4853    let client_a = server.create_client(cx_a, "user_a").await;
4854    let client_b = server.create_client(cx_b, "user_b").await;
4855    server
4856        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4857        .await;
4858    let active_call_a = cx_a.read(ActiveCall::global);
4859
4860    client_a
4861        .fs
4862        .insert_tree(
4863            "/root-1",
4864            json!({
4865                "main.rs": "use std::collections::HashMap;",
4866            }),
4867        )
4868        .await;
4869
4870    // Set up a fake language server.
4871    let mut language = Language::new(
4872        LanguageConfig {
4873            name: "Rust".into(),
4874            path_suffixes: vec!["rs".to_string()],
4875            ..Default::default()
4876        },
4877        Some(tree_sitter_rust::language()),
4878    );
4879    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4880    client_a.language_registry.add(Arc::new(language));
4881
4882    let (project_a, worktree_id) = client_a.build_local_project("/root-1", cx_a).await;
4883    let project_id = active_call_a
4884        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
4885        .await
4886        .unwrap();
4887    let project_b = client_b.build_remote_project(project_id, cx_b).await;
4888
4889    // Open the file as the guest
4890    let buffer_b = cx_b
4891        .background()
4892        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "main.rs"), cx)))
4893        .await
4894        .unwrap();
4895
4896    // Request hover information as the guest.
4897    let fake_language_server = fake_language_servers.next().await.unwrap();
4898    fake_language_server.handle_request::<lsp::request::HoverRequest, _, _>(
4899        |params, _| async move {
4900            assert_eq!(
4901                params
4902                    .text_document_position_params
4903                    .text_document
4904                    .uri
4905                    .as_str(),
4906                "file:///root-1/main.rs"
4907            );
4908            assert_eq!(
4909                params.text_document_position_params.position,
4910                lsp::Position::new(0, 22)
4911            );
4912            Ok(Some(lsp::Hover {
4913                contents: lsp::HoverContents::Array(vec![
4914                    lsp::MarkedString::String("Test hover content.".to_string()),
4915                    lsp::MarkedString::LanguageString(lsp::LanguageString {
4916                        language: "Rust".to_string(),
4917                        value: "let foo = 42;".to_string(),
4918                    }),
4919                ]),
4920                range: Some(lsp::Range::new(
4921                    lsp::Position::new(0, 22),
4922                    lsp::Position::new(0, 29),
4923                )),
4924            }))
4925        },
4926    );
4927
4928    let hover_info = project_b
4929        .update(cx_b, |p, cx| p.hover(&buffer_b, 22, cx))
4930        .await
4931        .unwrap()
4932        .unwrap();
4933    buffer_b.read_with(cx_b, |buffer, _| {
4934        let snapshot = buffer.snapshot();
4935        assert_eq!(hover_info.range.unwrap().to_offset(&snapshot), 22..29);
4936        assert_eq!(
4937            hover_info.contents,
4938            vec![
4939                project::HoverBlock {
4940                    text: "Test hover content.".to_string(),
4941                    kind: HoverBlockKind::Markdown,
4942                },
4943                project::HoverBlock {
4944                    text: "let foo = 42;".to_string(),
4945                    kind: HoverBlockKind::Code {
4946                        language: "Rust".to_string()
4947                    },
4948                }
4949            ]
4950        );
4951    });
4952}
4953
4954#[gpui::test(iterations = 10)]
4955async fn test_project_symbols(
4956    deterministic: Arc<Deterministic>,
4957    cx_a: &mut TestAppContext,
4958    cx_b: &mut TestAppContext,
4959) {
4960    deterministic.forbid_parking();
4961    let mut server = TestServer::start(&deterministic).await;
4962    let client_a = server.create_client(cx_a, "user_a").await;
4963    let client_b = server.create_client(cx_b, "user_b").await;
4964    server
4965        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
4966        .await;
4967    let active_call_a = cx_a.read(ActiveCall::global);
4968
4969    // Set up a fake language server.
4970    let mut language = Language::new(
4971        LanguageConfig {
4972            name: "Rust".into(),
4973            path_suffixes: vec!["rs".to_string()],
4974            ..Default::default()
4975        },
4976        Some(tree_sitter_rust::language()),
4977    );
4978    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
4979    client_a.language_registry.add(Arc::new(language));
4980
4981    client_a
4982        .fs
4983        .insert_tree(
4984            "/code",
4985            json!({
4986                "crate-1": {
4987                    "one.rs": "const ONE: usize = 1;",
4988                },
4989                "crate-2": {
4990                    "two.rs": "const TWO: usize = 2; const THREE: usize = 3;",
4991                },
4992                "private": {
4993                    "passwords.txt": "the-password",
4994                }
4995            }),
4996        )
4997        .await;
4998    let (project_a, worktree_id) = client_a.build_local_project("/code/crate-1", cx_a).await;
4999    let project_id = active_call_a
5000        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
5001        .await
5002        .unwrap();
5003    let project_b = client_b.build_remote_project(project_id, cx_b).await;
5004
5005    // Cause the language server to start.
5006    let _buffer = cx_b
5007        .background()
5008        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "one.rs"), cx)))
5009        .await
5010        .unwrap();
5011
5012    let fake_language_server = fake_language_servers.next().await.unwrap();
5013    fake_language_server.handle_request::<lsp::request::WorkspaceSymbol, _, _>(|_, _| async move {
5014        #[allow(deprecated)]
5015        Ok(Some(vec![lsp::SymbolInformation {
5016            name: "TWO".into(),
5017            location: lsp::Location {
5018                uri: lsp::Url::from_file_path("/code/crate-2/two.rs").unwrap(),
5019                range: lsp::Range::new(lsp::Position::new(0, 6), lsp::Position::new(0, 9)),
5020            },
5021            kind: lsp::SymbolKind::CONSTANT,
5022            tags: None,
5023            container_name: None,
5024            deprecated: None,
5025        }]))
5026    });
5027
5028    // Request the definition of a symbol as the guest.
5029    let symbols = project_b
5030        .update(cx_b, |p, cx| p.symbols("two", cx))
5031        .await
5032        .unwrap();
5033    assert_eq!(symbols.len(), 1);
5034    assert_eq!(symbols[0].name, "TWO");
5035
5036    // Open one of the returned symbols.
5037    let buffer_b_2 = project_b
5038        .update(cx_b, |project, cx| {
5039            project.open_buffer_for_symbol(&symbols[0], cx)
5040        })
5041        .await
5042        .unwrap();
5043    buffer_b_2.read_with(cx_b, |buffer, _| {
5044        assert_eq!(
5045            buffer.file().unwrap().path().as_ref(),
5046            Path::new("../crate-2/two.rs")
5047        );
5048    });
5049
5050    // Attempt to craft a symbol and violate host's privacy by opening an arbitrary file.
5051    let mut fake_symbol = symbols[0].clone();
5052    fake_symbol.path.path = Path::new("/code/secrets").into();
5053    let error = project_b
5054        .update(cx_b, |project, cx| {
5055            project.open_buffer_for_symbol(&fake_symbol, cx)
5056        })
5057        .await
5058        .unwrap_err();
5059    assert!(error.to_string().contains("invalid symbol signature"));
5060}
5061
5062#[gpui::test(iterations = 10)]
5063async fn test_open_buffer_while_getting_definition_pointing_to_it(
5064    deterministic: Arc<Deterministic>,
5065    cx_a: &mut TestAppContext,
5066    cx_b: &mut TestAppContext,
5067    mut rng: StdRng,
5068) {
5069    deterministic.forbid_parking();
5070    let mut server = TestServer::start(&deterministic).await;
5071    let client_a = server.create_client(cx_a, "user_a").await;
5072    let client_b = server.create_client(cx_b, "user_b").await;
5073    server
5074        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
5075        .await;
5076    let active_call_a = cx_a.read(ActiveCall::global);
5077
5078    // Set up a fake language server.
5079    let mut language = Language::new(
5080        LanguageConfig {
5081            name: "Rust".into(),
5082            path_suffixes: vec!["rs".to_string()],
5083            ..Default::default()
5084        },
5085        Some(tree_sitter_rust::language()),
5086    );
5087    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
5088    client_a.language_registry.add(Arc::new(language));
5089
5090    client_a
5091        .fs
5092        .insert_tree(
5093            "/root",
5094            json!({
5095                "a.rs": "const ONE: usize = b::TWO;",
5096                "b.rs": "const TWO: usize = 2",
5097            }),
5098        )
5099        .await;
5100    let (project_a, worktree_id) = client_a.build_local_project("/root", cx_a).await;
5101    let project_id = active_call_a
5102        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
5103        .await
5104        .unwrap();
5105    let project_b = client_b.build_remote_project(project_id, cx_b).await;
5106
5107    let buffer_b1 = cx_b
5108        .background()
5109        .spawn(project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "a.rs"), cx)))
5110        .await
5111        .unwrap();
5112
5113    let fake_language_server = fake_language_servers.next().await.unwrap();
5114    fake_language_server.handle_request::<lsp::request::GotoDefinition, _, _>(|_, _| async move {
5115        Ok(Some(lsp::GotoDefinitionResponse::Scalar(
5116            lsp::Location::new(
5117                lsp::Url::from_file_path("/root/b.rs").unwrap(),
5118                lsp::Range::new(lsp::Position::new(0, 6), lsp::Position::new(0, 9)),
5119            ),
5120        )))
5121    });
5122
5123    let definitions;
5124    let buffer_b2;
5125    if rng.gen() {
5126        definitions = project_b.update(cx_b, |p, cx| p.definition(&buffer_b1, 23, cx));
5127        buffer_b2 = project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "b.rs"), cx));
5128    } else {
5129        buffer_b2 = project_b.update(cx_b, |p, cx| p.open_buffer((worktree_id, "b.rs"), cx));
5130        definitions = project_b.update(cx_b, |p, cx| p.definition(&buffer_b1, 23, cx));
5131    }
5132
5133    let buffer_b2 = buffer_b2.await.unwrap();
5134    let definitions = definitions.await.unwrap();
5135    assert_eq!(definitions.len(), 1);
5136    assert_eq!(definitions[0].target.buffer, buffer_b2);
5137}
5138
5139#[gpui::test(iterations = 10)]
5140async fn test_collaborating_with_code_actions(
5141    deterministic: Arc<Deterministic>,
5142    cx_a: &mut TestAppContext,
5143    cx_b: &mut TestAppContext,
5144) {
5145    deterministic.forbid_parking();
5146    let mut server = TestServer::start(&deterministic).await;
5147    let client_a = server.create_client(cx_a, "user_a").await;
5148    let client_b = server.create_client(cx_b, "user_b").await;
5149    server
5150        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
5151        .await;
5152    let active_call_a = cx_a.read(ActiveCall::global);
5153
5154    cx_b.update(editor::init);
5155
5156    // Set up a fake language server.
5157    let mut language = Language::new(
5158        LanguageConfig {
5159            name: "Rust".into(),
5160            path_suffixes: vec!["rs".to_string()],
5161            ..Default::default()
5162        },
5163        Some(tree_sitter_rust::language()),
5164    );
5165    let mut fake_language_servers = language.set_fake_lsp_adapter(Default::default()).await;
5166    client_a.language_registry.add(Arc::new(language));
5167
5168    client_a
5169        .fs
5170        .insert_tree(
5171            "/a",
5172            json!({
5173                "main.rs": "mod other;\nfn main() { let foo = other::foo(); }",
5174                "other.rs": "pub fn foo() -> usize { 4 }",
5175            }),
5176        )
5177        .await;
5178    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
5179    let project_id = active_call_a
5180        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
5181        .await
5182        .unwrap();
5183
5184    // Join the project as client B.
5185    let project_b = client_b.build_remote_project(project_id, cx_b).await;
5186    let (_window_b, workspace_b) = cx_b.add_window(|cx| Workspace::test_new(project_b.clone(), cx));
5187    let editor_b = workspace_b
5188        .update(cx_b, |workspace, cx| {
5189            workspace.open_path((worktree_id, "main.rs"), None, true, cx)
5190        })
5191        .await
5192        .unwrap()
5193        .downcast::<Editor>()
5194        .unwrap();
5195
5196    let mut fake_language_server = fake_language_servers.next().await.unwrap();
5197    fake_language_server
5198        .handle_request::<lsp::request::CodeActionRequest, _, _>(|params, _| async move {
5199            assert_eq!(
5200                params.text_document.uri,
5201                lsp::Url::from_file_path("/a/main.rs").unwrap(),
5202            );
5203            assert_eq!(params.range.start, lsp::Position::new(0, 0));
5204            assert_eq!(params.range.end, lsp::Position::new(0, 0));
5205            Ok(None)
5206        })
5207        .next()
5208        .await;
5209
5210    // Move cursor to a location that contains code actions.
5211    editor_b.update(cx_b, |editor, cx| {
5212        editor.change_selections(None, cx, |s| {
5213            s.select_ranges([Point::new(1, 31)..Point::new(1, 31)])
5214        });
5215        cx.focus(&editor_b);
5216    });
5217
5218    fake_language_server
5219        .handle_request::<lsp::request::CodeActionRequest, _, _>(|params, _| async move {
5220            assert_eq!(
5221                params.text_document.uri,
5222                lsp::Url::from_file_path("/a/main.rs").unwrap(),
5223            );
5224            assert_eq!(params.range.start, lsp::Position::new(1, 31));
5225            assert_eq!(params.range.end, lsp::Position::new(1, 31));
5226
5227            Ok(Some(vec![lsp::CodeActionOrCommand::CodeAction(
5228                lsp::CodeAction {
5229                    title: "Inline into all callers".to_string(),
5230                    edit: Some(lsp::WorkspaceEdit {
5231                        changes: Some(
5232                            [
5233                                (
5234                                    lsp::Url::from_file_path("/a/main.rs").unwrap(),
5235                                    vec![lsp::TextEdit::new(
5236                                        lsp::Range::new(
5237                                            lsp::Position::new(1, 22),
5238                                            lsp::Position::new(1, 34),
5239                                        ),
5240                                        "4".to_string(),
5241                                    )],
5242                                ),
5243                                (
5244                                    lsp::Url::from_file_path("/a/other.rs").unwrap(),
5245                                    vec![lsp::TextEdit::new(
5246                                        lsp::Range::new(
5247                                            lsp::Position::new(0, 0),
5248                                            lsp::Position::new(0, 27),
5249                                        ),
5250                                        "".to_string(),
5251                                    )],
5252                                ),
5253                            ]
5254                            .into_iter()
5255                            .collect(),
5256                        ),
5257                        ..Default::default()
5258                    }),
5259                    data: Some(json!({
5260                        "codeActionParams": {
5261                            "range": {
5262                                "start": {"line": 1, "column": 31},
5263                                "end": {"line": 1, "column": 31},
5264                            }
5265                        }
5266                    })),
5267                    ..Default::default()
5268                },
5269            )]))
5270        })
5271        .next()
5272        .await;
5273
5274    // Toggle code actions and wait for them to display.
5275    editor_b.update(cx_b, |editor, cx| {
5276        editor.toggle_code_actions(
5277            &ToggleCodeActions {
5278                deployed_from_indicator: false,
5279            },
5280            cx,
5281        );
5282    });
5283    cx_a.foreground().run_until_parked();
5284    editor_b.read_with(cx_b, |editor, _| assert!(editor.context_menu_visible()));
5285
5286    fake_language_server.remove_request_handler::<lsp::request::CodeActionRequest>();
5287
5288    // Confirming the code action will trigger a resolve request.
5289    let confirm_action = workspace_b
5290        .update(cx_b, |workspace, cx| {
5291            Editor::confirm_code_action(workspace, &ConfirmCodeAction { item_ix: Some(0) }, cx)
5292        })
5293        .unwrap();
5294    fake_language_server.handle_request::<lsp::request::CodeActionResolveRequest, _, _>(
5295        |_, _| async move {
5296            Ok(lsp::CodeAction {
5297                title: "Inline into all callers".to_string(),
5298                edit: Some(lsp::WorkspaceEdit {
5299                    changes: Some(
5300                        [
5301                            (
5302                                lsp::Url::from_file_path("/a/main.rs").unwrap(),
5303                                vec![lsp::TextEdit::new(
5304                                    lsp::Range::new(
5305                                        lsp::Position::new(1, 22),
5306                                        lsp::Position::new(1, 34),
5307                                    ),
5308                                    "4".to_string(),
5309                                )],
5310                            ),
5311                            (
5312                                lsp::Url::from_file_path("/a/other.rs").unwrap(),
5313                                vec![lsp::TextEdit::new(
5314                                    lsp::Range::new(
5315                                        lsp::Position::new(0, 0),
5316                                        lsp::Position::new(0, 27),
5317                                    ),
5318                                    "".to_string(),
5319                                )],
5320                            ),
5321                        ]
5322                        .into_iter()
5323                        .collect(),
5324                    ),
5325                    ..Default::default()
5326                }),
5327                ..Default::default()
5328            })
5329        },
5330    );
5331
5332    // After the action is confirmed, an editor containing both modified files is opened.
5333    confirm_action.await.unwrap();
5334    let code_action_editor = workspace_b.read_with(cx_b, |workspace, cx| {
5335        workspace
5336            .active_item(cx)
5337            .unwrap()
5338            .downcast::<Editor>()
5339            .unwrap()
5340    });
5341    code_action_editor.update(cx_b, |editor, cx| {
5342        assert_eq!(editor.text(cx), "mod other;\nfn main() { let foo = 4; }\n");
5343        editor.undo(&Undo, cx);
5344        assert_eq!(
5345            editor.text(cx),
5346            "mod other;\nfn main() { let foo = other::foo(); }\npub fn foo() -> usize { 4 }"
5347        );
5348        editor.redo(&Redo, cx);
5349        assert_eq!(editor.text(cx), "mod other;\nfn main() { let foo = 4; }\n");
5350    });
5351}
5352
5353#[gpui::test(iterations = 10)]
5354async fn test_collaborating_with_renames(
5355    deterministic: Arc<Deterministic>,
5356    cx_a: &mut TestAppContext,
5357    cx_b: &mut TestAppContext,
5358) {
5359    deterministic.forbid_parking();
5360    let mut server = TestServer::start(&deterministic).await;
5361    let client_a = server.create_client(cx_a, "user_a").await;
5362    let client_b = server.create_client(cx_b, "user_b").await;
5363    server
5364        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
5365        .await;
5366    let active_call_a = cx_a.read(ActiveCall::global);
5367
5368    cx_b.update(editor::init);
5369
5370    // Set up a fake language server.
5371    let mut language = Language::new(
5372        LanguageConfig {
5373            name: "Rust".into(),
5374            path_suffixes: vec!["rs".to_string()],
5375            ..Default::default()
5376        },
5377        Some(tree_sitter_rust::language()),
5378    );
5379    let mut fake_language_servers = language
5380        .set_fake_lsp_adapter(Arc::new(FakeLspAdapter {
5381            capabilities: lsp::ServerCapabilities {
5382                rename_provider: Some(lsp::OneOf::Right(lsp::RenameOptions {
5383                    prepare_provider: Some(true),
5384                    work_done_progress_options: Default::default(),
5385                })),
5386                ..Default::default()
5387            },
5388            ..Default::default()
5389        }))
5390        .await;
5391    client_a.language_registry.add(Arc::new(language));
5392
5393    client_a
5394        .fs
5395        .insert_tree(
5396            "/dir",
5397            json!({
5398                "one.rs": "const ONE: usize = 1;",
5399                "two.rs": "const TWO: usize = one::ONE + one::ONE;"
5400            }),
5401        )
5402        .await;
5403    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
5404    let project_id = active_call_a
5405        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
5406        .await
5407        .unwrap();
5408    let project_b = client_b.build_remote_project(project_id, cx_b).await;
5409
5410    let (_window_b, workspace_b) = cx_b.add_window(|cx| Workspace::test_new(project_b.clone(), cx));
5411    let editor_b = workspace_b
5412        .update(cx_b, |workspace, cx| {
5413            workspace.open_path((worktree_id, "one.rs"), None, true, cx)
5414        })
5415        .await
5416        .unwrap()
5417        .downcast::<Editor>()
5418        .unwrap();
5419    let fake_language_server = fake_language_servers.next().await.unwrap();
5420
5421    // Move cursor to a location that can be renamed.
5422    let prepare_rename = editor_b.update(cx_b, |editor, cx| {
5423        editor.change_selections(None, cx, |s| s.select_ranges([7..7]));
5424        editor.rename(&Rename, cx).unwrap()
5425    });
5426
5427    fake_language_server
5428        .handle_request::<lsp::request::PrepareRenameRequest, _, _>(|params, _| async move {
5429            assert_eq!(params.text_document.uri.as_str(), "file:///dir/one.rs");
5430            assert_eq!(params.position, lsp::Position::new(0, 7));
5431            Ok(Some(lsp::PrepareRenameResponse::Range(lsp::Range::new(
5432                lsp::Position::new(0, 6),
5433                lsp::Position::new(0, 9),
5434            ))))
5435        })
5436        .next()
5437        .await
5438        .unwrap();
5439    prepare_rename.await.unwrap();
5440    editor_b.update(cx_b, |editor, cx| {
5441        let rename = editor.pending_rename().unwrap();
5442        let buffer = editor.buffer().read(cx).snapshot(cx);
5443        assert_eq!(
5444            rename.range.start.to_offset(&buffer)..rename.range.end.to_offset(&buffer),
5445            6..9
5446        );
5447        rename.editor.update(cx, |rename_editor, cx| {
5448            rename_editor.buffer().update(cx, |rename_buffer, cx| {
5449                rename_buffer.edit([(0..3, "THREE")], None, cx);
5450            });
5451        });
5452    });
5453
5454    let confirm_rename = workspace_b.update(cx_b, |workspace, cx| {
5455        Editor::confirm_rename(workspace, &ConfirmRename, cx).unwrap()
5456    });
5457    fake_language_server
5458        .handle_request::<lsp::request::Rename, _, _>(|params, _| async move {
5459            assert_eq!(
5460                params.text_document_position.text_document.uri.as_str(),
5461                "file:///dir/one.rs"
5462            );
5463            assert_eq!(
5464                params.text_document_position.position,
5465                lsp::Position::new(0, 6)
5466            );
5467            assert_eq!(params.new_name, "THREE");
5468            Ok(Some(lsp::WorkspaceEdit {
5469                changes: Some(
5470                    [
5471                        (
5472                            lsp::Url::from_file_path("/dir/one.rs").unwrap(),
5473                            vec![lsp::TextEdit::new(
5474                                lsp::Range::new(lsp::Position::new(0, 6), lsp::Position::new(0, 9)),
5475                                "THREE".to_string(),
5476                            )],
5477                        ),
5478                        (
5479                            lsp::Url::from_file_path("/dir/two.rs").unwrap(),
5480                            vec![
5481                                lsp::TextEdit::new(
5482                                    lsp::Range::new(
5483                                        lsp::Position::new(0, 24),
5484                                        lsp::Position::new(0, 27),
5485                                    ),
5486                                    "THREE".to_string(),
5487                                ),
5488                                lsp::TextEdit::new(
5489                                    lsp::Range::new(
5490                                        lsp::Position::new(0, 35),
5491                                        lsp::Position::new(0, 38),
5492                                    ),
5493                                    "THREE".to_string(),
5494                                ),
5495                            ],
5496                        ),
5497                    ]
5498                    .into_iter()
5499                    .collect(),
5500                ),
5501                ..Default::default()
5502            }))
5503        })
5504        .next()
5505        .await
5506        .unwrap();
5507    confirm_rename.await.unwrap();
5508
5509    let rename_editor = workspace_b.read_with(cx_b, |workspace, cx| {
5510        workspace
5511            .active_item(cx)
5512            .unwrap()
5513            .downcast::<Editor>()
5514            .unwrap()
5515    });
5516    rename_editor.update(cx_b, |editor, cx| {
5517        assert_eq!(
5518            editor.text(cx),
5519            "const THREE: usize = 1;\nconst TWO: usize = one::THREE + one::THREE;"
5520        );
5521        editor.undo(&Undo, cx);
5522        assert_eq!(
5523            editor.text(cx),
5524            "const ONE: usize = 1;\nconst TWO: usize = one::ONE + one::ONE;"
5525        );
5526        editor.redo(&Redo, cx);
5527        assert_eq!(
5528            editor.text(cx),
5529            "const THREE: usize = 1;\nconst TWO: usize = one::THREE + one::THREE;"
5530        );
5531    });
5532
5533    // Ensure temporary rename edits cannot be undone/redone.
5534    editor_b.update(cx_b, |editor, cx| {
5535        editor.undo(&Undo, cx);
5536        assert_eq!(editor.text(cx), "const ONE: usize = 1;");
5537        editor.undo(&Undo, cx);
5538        assert_eq!(editor.text(cx), "const ONE: usize = 1;");
5539        editor.redo(&Redo, cx);
5540        assert_eq!(editor.text(cx), "const THREE: usize = 1;");
5541    })
5542}
5543
5544#[gpui::test(iterations = 10)]
5545async fn test_language_server_statuses(
5546    deterministic: Arc<Deterministic>,
5547    cx_a: &mut TestAppContext,
5548    cx_b: &mut TestAppContext,
5549) {
5550    deterministic.forbid_parking();
5551    let mut server = TestServer::start(&deterministic).await;
5552    let client_a = server.create_client(cx_a, "user_a").await;
5553    let client_b = server.create_client(cx_b, "user_b").await;
5554    server
5555        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
5556        .await;
5557    let active_call_a = cx_a.read(ActiveCall::global);
5558
5559    cx_b.update(editor::init);
5560
5561    // Set up a fake language server.
5562    let mut language = Language::new(
5563        LanguageConfig {
5564            name: "Rust".into(),
5565            path_suffixes: vec!["rs".to_string()],
5566            ..Default::default()
5567        },
5568        Some(tree_sitter_rust::language()),
5569    );
5570    let mut fake_language_servers = language
5571        .set_fake_lsp_adapter(Arc::new(FakeLspAdapter {
5572            name: "the-language-server",
5573            ..Default::default()
5574        }))
5575        .await;
5576    client_a.language_registry.add(Arc::new(language));
5577
5578    client_a
5579        .fs
5580        .insert_tree(
5581            "/dir",
5582            json!({
5583                "main.rs": "const ONE: usize = 1;",
5584            }),
5585        )
5586        .await;
5587    let (project_a, worktree_id) = client_a.build_local_project("/dir", cx_a).await;
5588
5589    let _buffer_a = project_a
5590        .update(cx_a, |p, cx| p.open_buffer((worktree_id, "main.rs"), cx))
5591        .await
5592        .unwrap();
5593
5594    let fake_language_server = fake_language_servers.next().await.unwrap();
5595    fake_language_server.start_progress("the-token").await;
5596    fake_language_server.notify::<lsp::notification::Progress>(lsp::ProgressParams {
5597        token: lsp::NumberOrString::String("the-token".to_string()),
5598        value: lsp::ProgressParamsValue::WorkDone(lsp::WorkDoneProgress::Report(
5599            lsp::WorkDoneProgressReport {
5600                message: Some("the-message".to_string()),
5601                ..Default::default()
5602            },
5603        )),
5604    });
5605    deterministic.run_until_parked();
5606    project_a.read_with(cx_a, |project, _| {
5607        let status = project.language_server_statuses().next().unwrap();
5608        assert_eq!(status.name, "the-language-server");
5609        assert_eq!(status.pending_work.len(), 1);
5610        assert_eq!(
5611            status.pending_work["the-token"].message.as_ref().unwrap(),
5612            "the-message"
5613        );
5614    });
5615
5616    let project_id = active_call_a
5617        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
5618        .await
5619        .unwrap();
5620    deterministic.run_until_parked();
5621    let project_b = client_b.build_remote_project(project_id, cx_b).await;
5622    project_b.read_with(cx_b, |project, _| {
5623        let status = project.language_server_statuses().next().unwrap();
5624        assert_eq!(status.name, "the-language-server");
5625    });
5626
5627    fake_language_server.notify::<lsp::notification::Progress>(lsp::ProgressParams {
5628        token: lsp::NumberOrString::String("the-token".to_string()),
5629        value: lsp::ProgressParamsValue::WorkDone(lsp::WorkDoneProgress::Report(
5630            lsp::WorkDoneProgressReport {
5631                message: Some("the-message-2".to_string()),
5632                ..Default::default()
5633            },
5634        )),
5635    });
5636    deterministic.run_until_parked();
5637    project_a.read_with(cx_a, |project, _| {
5638        let status = project.language_server_statuses().next().unwrap();
5639        assert_eq!(status.name, "the-language-server");
5640        assert_eq!(status.pending_work.len(), 1);
5641        assert_eq!(
5642            status.pending_work["the-token"].message.as_ref().unwrap(),
5643            "the-message-2"
5644        );
5645    });
5646    project_b.read_with(cx_b, |project, _| {
5647        let status = project.language_server_statuses().next().unwrap();
5648        assert_eq!(status.name, "the-language-server");
5649        assert_eq!(status.pending_work.len(), 1);
5650        assert_eq!(
5651            status.pending_work["the-token"].message.as_ref().unwrap(),
5652            "the-message-2"
5653        );
5654    });
5655}
5656
5657#[gpui::test(iterations = 10)]
5658async fn test_contacts(
5659    deterministic: Arc<Deterministic>,
5660    cx_a: &mut TestAppContext,
5661    cx_b: &mut TestAppContext,
5662    cx_c: &mut TestAppContext,
5663    cx_d: &mut TestAppContext,
5664) {
5665    deterministic.forbid_parking();
5666    let mut server = TestServer::start(&deterministic).await;
5667    let client_a = server.create_client(cx_a, "user_a").await;
5668    let client_b = server.create_client(cx_b, "user_b").await;
5669    let client_c = server.create_client(cx_c, "user_c").await;
5670    let client_d = server.create_client(cx_d, "user_d").await;
5671    server
5672        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b), (&client_c, cx_c)])
5673        .await;
5674    let active_call_a = cx_a.read(ActiveCall::global);
5675    let active_call_b = cx_b.read(ActiveCall::global);
5676    let active_call_c = cx_c.read(ActiveCall::global);
5677    let _active_call_d = cx_d.read(ActiveCall::global);
5678
5679    deterministic.run_until_parked();
5680    assert_eq!(
5681        contacts(&client_a, cx_a),
5682        [
5683            ("user_b".to_string(), "online", "free"),
5684            ("user_c".to_string(), "online", "free")
5685        ]
5686    );
5687    assert_eq!(
5688        contacts(&client_b, cx_b),
5689        [
5690            ("user_a".to_string(), "online", "free"),
5691            ("user_c".to_string(), "online", "free")
5692        ]
5693    );
5694    assert_eq!(
5695        contacts(&client_c, cx_c),
5696        [
5697            ("user_a".to_string(), "online", "free"),
5698            ("user_b".to_string(), "online", "free")
5699        ]
5700    );
5701    assert_eq!(contacts(&client_d, cx_d), []);
5702
5703    server.disconnect_client(client_c.peer_id().unwrap());
5704    server.forbid_connections();
5705    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
5706    assert_eq!(
5707        contacts(&client_a, cx_a),
5708        [
5709            ("user_b".to_string(), "online", "free"),
5710            ("user_c".to_string(), "offline", "free")
5711        ]
5712    );
5713    assert_eq!(
5714        contacts(&client_b, cx_b),
5715        [
5716            ("user_a".to_string(), "online", "free"),
5717            ("user_c".to_string(), "offline", "free")
5718        ]
5719    );
5720    assert_eq!(contacts(&client_c, cx_c), []);
5721    assert_eq!(contacts(&client_d, cx_d), []);
5722
5723    server.allow_connections();
5724    client_c
5725        .authenticate_and_connect(false, &cx_c.to_async())
5726        .await
5727        .unwrap();
5728
5729    deterministic.run_until_parked();
5730    assert_eq!(
5731        contacts(&client_a, cx_a),
5732        [
5733            ("user_b".to_string(), "online", "free"),
5734            ("user_c".to_string(), "online", "free")
5735        ]
5736    );
5737    assert_eq!(
5738        contacts(&client_b, cx_b),
5739        [
5740            ("user_a".to_string(), "online", "free"),
5741            ("user_c".to_string(), "online", "free")
5742        ]
5743    );
5744    assert_eq!(
5745        contacts(&client_c, cx_c),
5746        [
5747            ("user_a".to_string(), "online", "free"),
5748            ("user_b".to_string(), "online", "free")
5749        ]
5750    );
5751    assert_eq!(contacts(&client_d, cx_d), []);
5752
5753    active_call_a
5754        .update(cx_a, |call, cx| {
5755            call.invite(client_b.user_id().unwrap(), None, cx)
5756        })
5757        .await
5758        .unwrap();
5759    deterministic.run_until_parked();
5760    assert_eq!(
5761        contacts(&client_a, cx_a),
5762        [
5763            ("user_b".to_string(), "online", "busy"),
5764            ("user_c".to_string(), "online", "free")
5765        ]
5766    );
5767    assert_eq!(
5768        contacts(&client_b, cx_b),
5769        [
5770            ("user_a".to_string(), "online", "busy"),
5771            ("user_c".to_string(), "online", "free")
5772        ]
5773    );
5774    assert_eq!(
5775        contacts(&client_c, cx_c),
5776        [
5777            ("user_a".to_string(), "online", "busy"),
5778            ("user_b".to_string(), "online", "busy")
5779        ]
5780    );
5781    assert_eq!(contacts(&client_d, cx_d), []);
5782
5783    // Client B and client D become contacts while client B is being called.
5784    server
5785        .make_contacts(&mut [(&client_b, cx_b), (&client_d, cx_d)])
5786        .await;
5787    deterministic.run_until_parked();
5788    assert_eq!(
5789        contacts(&client_a, cx_a),
5790        [
5791            ("user_b".to_string(), "online", "busy"),
5792            ("user_c".to_string(), "online", "free")
5793        ]
5794    );
5795    assert_eq!(
5796        contacts(&client_b, cx_b),
5797        [
5798            ("user_a".to_string(), "online", "busy"),
5799            ("user_c".to_string(), "online", "free"),
5800            ("user_d".to_string(), "online", "free"),
5801        ]
5802    );
5803    assert_eq!(
5804        contacts(&client_c, cx_c),
5805        [
5806            ("user_a".to_string(), "online", "busy"),
5807            ("user_b".to_string(), "online", "busy")
5808        ]
5809    );
5810    assert_eq!(
5811        contacts(&client_d, cx_d),
5812        [("user_b".to_string(), "online", "busy")]
5813    );
5814
5815    active_call_b.update(cx_b, |call, _| call.decline_incoming().unwrap());
5816    deterministic.run_until_parked();
5817    assert_eq!(
5818        contacts(&client_a, cx_a),
5819        [
5820            ("user_b".to_string(), "online", "free"),
5821            ("user_c".to_string(), "online", "free")
5822        ]
5823    );
5824    assert_eq!(
5825        contacts(&client_b, cx_b),
5826        [
5827            ("user_a".to_string(), "online", "free"),
5828            ("user_c".to_string(), "online", "free"),
5829            ("user_d".to_string(), "online", "free")
5830        ]
5831    );
5832    assert_eq!(
5833        contacts(&client_c, cx_c),
5834        [
5835            ("user_a".to_string(), "online", "free"),
5836            ("user_b".to_string(), "online", "free")
5837        ]
5838    );
5839    assert_eq!(
5840        contacts(&client_d, cx_d),
5841        [("user_b".to_string(), "online", "free")]
5842    );
5843
5844    active_call_c
5845        .update(cx_c, |call, cx| {
5846            call.invite(client_a.user_id().unwrap(), None, cx)
5847        })
5848        .await
5849        .unwrap();
5850    deterministic.run_until_parked();
5851    assert_eq!(
5852        contacts(&client_a, cx_a),
5853        [
5854            ("user_b".to_string(), "online", "free"),
5855            ("user_c".to_string(), "online", "busy")
5856        ]
5857    );
5858    assert_eq!(
5859        contacts(&client_b, cx_b),
5860        [
5861            ("user_a".to_string(), "online", "busy"),
5862            ("user_c".to_string(), "online", "busy"),
5863            ("user_d".to_string(), "online", "free")
5864        ]
5865    );
5866    assert_eq!(
5867        contacts(&client_c, cx_c),
5868        [
5869            ("user_a".to_string(), "online", "busy"),
5870            ("user_b".to_string(), "online", "free")
5871        ]
5872    );
5873    assert_eq!(
5874        contacts(&client_d, cx_d),
5875        [("user_b".to_string(), "online", "free")]
5876    );
5877
5878    active_call_a
5879        .update(cx_a, |call, cx| call.accept_incoming(cx))
5880        .await
5881        .unwrap();
5882    deterministic.run_until_parked();
5883    assert_eq!(
5884        contacts(&client_a, cx_a),
5885        [
5886            ("user_b".to_string(), "online", "free"),
5887            ("user_c".to_string(), "online", "busy")
5888        ]
5889    );
5890    assert_eq!(
5891        contacts(&client_b, cx_b),
5892        [
5893            ("user_a".to_string(), "online", "busy"),
5894            ("user_c".to_string(), "online", "busy"),
5895            ("user_d".to_string(), "online", "free")
5896        ]
5897    );
5898    assert_eq!(
5899        contacts(&client_c, cx_c),
5900        [
5901            ("user_a".to_string(), "online", "busy"),
5902            ("user_b".to_string(), "online", "free")
5903        ]
5904    );
5905    assert_eq!(
5906        contacts(&client_d, cx_d),
5907        [("user_b".to_string(), "online", "free")]
5908    );
5909
5910    active_call_a
5911        .update(cx_a, |call, cx| {
5912            call.invite(client_b.user_id().unwrap(), None, cx)
5913        })
5914        .await
5915        .unwrap();
5916    deterministic.run_until_parked();
5917    assert_eq!(
5918        contacts(&client_a, cx_a),
5919        [
5920            ("user_b".to_string(), "online", "busy"),
5921            ("user_c".to_string(), "online", "busy")
5922        ]
5923    );
5924    assert_eq!(
5925        contacts(&client_b, cx_b),
5926        [
5927            ("user_a".to_string(), "online", "busy"),
5928            ("user_c".to_string(), "online", "busy"),
5929            ("user_d".to_string(), "online", "free")
5930        ]
5931    );
5932    assert_eq!(
5933        contacts(&client_c, cx_c),
5934        [
5935            ("user_a".to_string(), "online", "busy"),
5936            ("user_b".to_string(), "online", "busy")
5937        ]
5938    );
5939    assert_eq!(
5940        contacts(&client_d, cx_d),
5941        [("user_b".to_string(), "online", "busy")]
5942    );
5943
5944    active_call_a
5945        .update(cx_a, |call, cx| call.hang_up(cx))
5946        .await
5947        .unwrap();
5948    deterministic.run_until_parked();
5949    assert_eq!(
5950        contacts(&client_a, cx_a),
5951        [
5952            ("user_b".to_string(), "online", "free"),
5953            ("user_c".to_string(), "online", "free")
5954        ]
5955    );
5956    assert_eq!(
5957        contacts(&client_b, cx_b),
5958        [
5959            ("user_a".to_string(), "online", "free"),
5960            ("user_c".to_string(), "online", "free"),
5961            ("user_d".to_string(), "online", "free")
5962        ]
5963    );
5964    assert_eq!(
5965        contacts(&client_c, cx_c),
5966        [
5967            ("user_a".to_string(), "online", "free"),
5968            ("user_b".to_string(), "online", "free")
5969        ]
5970    );
5971    assert_eq!(
5972        contacts(&client_d, cx_d),
5973        [("user_b".to_string(), "online", "free")]
5974    );
5975
5976    active_call_a
5977        .update(cx_a, |call, cx| {
5978            call.invite(client_b.user_id().unwrap(), None, cx)
5979        })
5980        .await
5981        .unwrap();
5982    deterministic.run_until_parked();
5983    assert_eq!(
5984        contacts(&client_a, cx_a),
5985        [
5986            ("user_b".to_string(), "online", "busy"),
5987            ("user_c".to_string(), "online", "free")
5988        ]
5989    );
5990    assert_eq!(
5991        contacts(&client_b, cx_b),
5992        [
5993            ("user_a".to_string(), "online", "busy"),
5994            ("user_c".to_string(), "online", "free"),
5995            ("user_d".to_string(), "online", "free")
5996        ]
5997    );
5998    assert_eq!(
5999        contacts(&client_c, cx_c),
6000        [
6001            ("user_a".to_string(), "online", "busy"),
6002            ("user_b".to_string(), "online", "busy")
6003        ]
6004    );
6005    assert_eq!(
6006        contacts(&client_d, cx_d),
6007        [("user_b".to_string(), "online", "busy")]
6008    );
6009
6010    server.forbid_connections();
6011    server.disconnect_client(client_a.peer_id().unwrap());
6012    deterministic.advance_clock(RECEIVE_TIMEOUT + RECONNECT_TIMEOUT);
6013    assert_eq!(contacts(&client_a, cx_a), []);
6014    assert_eq!(
6015        contacts(&client_b, cx_b),
6016        [
6017            ("user_a".to_string(), "offline", "free"),
6018            ("user_c".to_string(), "online", "free"),
6019            ("user_d".to_string(), "online", "free")
6020        ]
6021    );
6022    assert_eq!(
6023        contacts(&client_c, cx_c),
6024        [
6025            ("user_a".to_string(), "offline", "free"),
6026            ("user_b".to_string(), "online", "free")
6027        ]
6028    );
6029    assert_eq!(
6030        contacts(&client_d, cx_d),
6031        [("user_b".to_string(), "online", "free")]
6032    );
6033
6034    // Test removing a contact
6035    client_b
6036        .user_store
6037        .update(cx_b, |store, cx| {
6038            store.remove_contact(client_c.user_id().unwrap(), cx)
6039        })
6040        .await
6041        .unwrap();
6042    deterministic.run_until_parked();
6043    assert_eq!(
6044        contacts(&client_b, cx_b),
6045        [
6046            ("user_a".to_string(), "offline", "free"),
6047            ("user_d".to_string(), "online", "free")
6048        ]
6049    );
6050    assert_eq!(
6051        contacts(&client_c, cx_c),
6052        [("user_a".to_string(), "offline", "free"),]
6053    );
6054
6055    fn contacts(
6056        client: &TestClient,
6057        cx: &TestAppContext,
6058    ) -> Vec<(String, &'static str, &'static str)> {
6059        client.user_store.read_with(cx, |store, _| {
6060            store
6061                .contacts()
6062                .iter()
6063                .map(|contact| {
6064                    (
6065                        contact.user.github_login.clone(),
6066                        if contact.online { "online" } else { "offline" },
6067                        if contact.busy { "busy" } else { "free" },
6068                    )
6069                })
6070                .collect()
6071        })
6072    }
6073}
6074
6075#[gpui::test(iterations = 10)]
6076async fn test_contact_requests(
6077    deterministic: Arc<Deterministic>,
6078    cx_a: &mut TestAppContext,
6079    cx_a2: &mut TestAppContext,
6080    cx_b: &mut TestAppContext,
6081    cx_b2: &mut TestAppContext,
6082    cx_c: &mut TestAppContext,
6083    cx_c2: &mut TestAppContext,
6084) {
6085    deterministic.forbid_parking();
6086
6087    // Connect to a server as 3 clients.
6088    let mut server = TestServer::start(&deterministic).await;
6089    let client_a = server.create_client(cx_a, "user_a").await;
6090    let client_a2 = server.create_client(cx_a2, "user_a").await;
6091    let client_b = server.create_client(cx_b, "user_b").await;
6092    let client_b2 = server.create_client(cx_b2, "user_b").await;
6093    let client_c = server.create_client(cx_c, "user_c").await;
6094    let client_c2 = server.create_client(cx_c2, "user_c").await;
6095
6096    assert_eq!(client_a.user_id().unwrap(), client_a2.user_id().unwrap());
6097    assert_eq!(client_b.user_id().unwrap(), client_b2.user_id().unwrap());
6098    assert_eq!(client_c.user_id().unwrap(), client_c2.user_id().unwrap());
6099
6100    // User A and User C request that user B become their contact.
6101    client_a
6102        .user_store
6103        .update(cx_a, |store, cx| {
6104            store.request_contact(client_b.user_id().unwrap(), cx)
6105        })
6106        .await
6107        .unwrap();
6108    client_c
6109        .user_store
6110        .update(cx_c, |store, cx| {
6111            store.request_contact(client_b.user_id().unwrap(), cx)
6112        })
6113        .await
6114        .unwrap();
6115    deterministic.run_until_parked();
6116
6117    // All users see the pending request appear in all their clients.
6118    assert_eq!(
6119        client_a.summarize_contacts(cx_a).outgoing_requests,
6120        &["user_b"]
6121    );
6122    assert_eq!(
6123        client_a2.summarize_contacts(cx_a2).outgoing_requests,
6124        &["user_b"]
6125    );
6126    assert_eq!(
6127        client_b.summarize_contacts(cx_b).incoming_requests,
6128        &["user_a", "user_c"]
6129    );
6130    assert_eq!(
6131        client_b2.summarize_contacts(cx_b2).incoming_requests,
6132        &["user_a", "user_c"]
6133    );
6134    assert_eq!(
6135        client_c.summarize_contacts(cx_c).outgoing_requests,
6136        &["user_b"]
6137    );
6138    assert_eq!(
6139        client_c2.summarize_contacts(cx_c2).outgoing_requests,
6140        &["user_b"]
6141    );
6142
6143    // Contact requests are present upon connecting (tested here via disconnect/reconnect)
6144    disconnect_and_reconnect(&client_a, cx_a).await;
6145    disconnect_and_reconnect(&client_b, cx_b).await;
6146    disconnect_and_reconnect(&client_c, cx_c).await;
6147    deterministic.run_until_parked();
6148    assert_eq!(
6149        client_a.summarize_contacts(cx_a).outgoing_requests,
6150        &["user_b"]
6151    );
6152    assert_eq!(
6153        client_b.summarize_contacts(cx_b).incoming_requests,
6154        &["user_a", "user_c"]
6155    );
6156    assert_eq!(
6157        client_c.summarize_contacts(cx_c).outgoing_requests,
6158        &["user_b"]
6159    );
6160
6161    // User B accepts the request from user A.
6162    client_b
6163        .user_store
6164        .update(cx_b, |store, cx| {
6165            store.respond_to_contact_request(client_a.user_id().unwrap(), true, cx)
6166        })
6167        .await
6168        .unwrap();
6169
6170    deterministic.run_until_parked();
6171
6172    // User B sees user A as their contact now in all client, and the incoming request from them is removed.
6173    let contacts_b = client_b.summarize_contacts(cx_b);
6174    assert_eq!(contacts_b.current, &["user_a"]);
6175    assert_eq!(contacts_b.incoming_requests, &["user_c"]);
6176    let contacts_b2 = client_b2.summarize_contacts(cx_b2);
6177    assert_eq!(contacts_b2.current, &["user_a"]);
6178    assert_eq!(contacts_b2.incoming_requests, &["user_c"]);
6179
6180    // User A sees user B as their contact now in all clients, and the outgoing request to them is removed.
6181    let contacts_a = client_a.summarize_contacts(cx_a);
6182    assert_eq!(contacts_a.current, &["user_b"]);
6183    assert!(contacts_a.outgoing_requests.is_empty());
6184    let contacts_a2 = client_a2.summarize_contacts(cx_a2);
6185    assert_eq!(contacts_a2.current, &["user_b"]);
6186    assert!(contacts_a2.outgoing_requests.is_empty());
6187
6188    // Contacts are present upon connecting (tested here via disconnect/reconnect)
6189    disconnect_and_reconnect(&client_a, cx_a).await;
6190    disconnect_and_reconnect(&client_b, cx_b).await;
6191    disconnect_and_reconnect(&client_c, cx_c).await;
6192    deterministic.run_until_parked();
6193    assert_eq!(client_a.summarize_contacts(cx_a).current, &["user_b"]);
6194    assert_eq!(client_b.summarize_contacts(cx_b).current, &["user_a"]);
6195    assert_eq!(
6196        client_b.summarize_contacts(cx_b).incoming_requests,
6197        &["user_c"]
6198    );
6199    assert!(client_c.summarize_contacts(cx_c).current.is_empty());
6200    assert_eq!(
6201        client_c.summarize_contacts(cx_c).outgoing_requests,
6202        &["user_b"]
6203    );
6204
6205    // User B rejects the request from user C.
6206    client_b
6207        .user_store
6208        .update(cx_b, |store, cx| {
6209            store.respond_to_contact_request(client_c.user_id().unwrap(), false, cx)
6210        })
6211        .await
6212        .unwrap();
6213
6214    deterministic.run_until_parked();
6215
6216    // User B doesn't see user C as their contact, and the incoming request from them is removed.
6217    let contacts_b = client_b.summarize_contacts(cx_b);
6218    assert_eq!(contacts_b.current, &["user_a"]);
6219    assert!(contacts_b.incoming_requests.is_empty());
6220    let contacts_b2 = client_b2.summarize_contacts(cx_b2);
6221    assert_eq!(contacts_b2.current, &["user_a"]);
6222    assert!(contacts_b2.incoming_requests.is_empty());
6223
6224    // User C doesn't see user B as their contact, and the outgoing request to them is removed.
6225    let contacts_c = client_c.summarize_contacts(cx_c);
6226    assert!(contacts_c.current.is_empty());
6227    assert!(contacts_c.outgoing_requests.is_empty());
6228    let contacts_c2 = client_c2.summarize_contacts(cx_c2);
6229    assert!(contacts_c2.current.is_empty());
6230    assert!(contacts_c2.outgoing_requests.is_empty());
6231
6232    // Incoming/outgoing requests are not present upon connecting (tested here via disconnect/reconnect)
6233    disconnect_and_reconnect(&client_a, cx_a).await;
6234    disconnect_and_reconnect(&client_b, cx_b).await;
6235    disconnect_and_reconnect(&client_c, cx_c).await;
6236    deterministic.run_until_parked();
6237    assert_eq!(client_a.summarize_contacts(cx_a).current, &["user_b"]);
6238    assert_eq!(client_b.summarize_contacts(cx_b).current, &["user_a"]);
6239    assert!(client_b
6240        .summarize_contacts(cx_b)
6241        .incoming_requests
6242        .is_empty());
6243    assert!(client_c.summarize_contacts(cx_c).current.is_empty());
6244    assert!(client_c
6245        .summarize_contacts(cx_c)
6246        .outgoing_requests
6247        .is_empty());
6248
6249    async fn disconnect_and_reconnect(client: &TestClient, cx: &mut TestAppContext) {
6250        client.disconnect(&cx.to_async());
6251        client.clear_contacts(cx).await;
6252        client
6253            .authenticate_and_connect(false, &cx.to_async())
6254            .await
6255            .unwrap();
6256    }
6257}
6258
6259#[gpui::test(iterations = 10)]
6260async fn test_basic_following(
6261    deterministic: Arc<Deterministic>,
6262    cx_a: &mut TestAppContext,
6263    cx_b: &mut TestAppContext,
6264    cx_c: &mut TestAppContext,
6265    cx_d: &mut TestAppContext,
6266) {
6267    deterministic.forbid_parking();
6268
6269    let mut server = TestServer::start(&deterministic).await;
6270    let client_a = server.create_client(cx_a, "user_a").await;
6271    let client_b = server.create_client(cx_b, "user_b").await;
6272    let client_c = server.create_client(cx_c, "user_c").await;
6273    let client_d = server.create_client(cx_d, "user_d").await;
6274    server
6275        .create_room(&mut [
6276            (&client_a, cx_a),
6277            (&client_b, cx_b),
6278            (&client_c, cx_c),
6279            (&client_d, cx_d),
6280        ])
6281        .await;
6282    let active_call_a = cx_a.read(ActiveCall::global);
6283    let active_call_b = cx_b.read(ActiveCall::global);
6284
6285    cx_a.update(editor::init);
6286    cx_b.update(editor::init);
6287
6288    client_a
6289        .fs
6290        .insert_tree(
6291            "/a",
6292            json!({
6293                "1.txt": "one\none\none",
6294                "2.txt": "two\ntwo\ntwo",
6295                "3.txt": "three\nthree\nthree",
6296            }),
6297        )
6298        .await;
6299    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
6300    active_call_a
6301        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
6302        .await
6303        .unwrap();
6304
6305    let project_id = active_call_a
6306        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
6307        .await
6308        .unwrap();
6309    let project_b = client_b.build_remote_project(project_id, cx_b).await;
6310    active_call_b
6311        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
6312        .await
6313        .unwrap();
6314
6315    let workspace_a = client_a.build_workspace(&project_a, cx_a);
6316    let workspace_b = client_b.build_workspace(&project_b, cx_b);
6317
6318    // Client A opens some editors.
6319    let pane_a = workspace_a.read_with(cx_a, |workspace, _| workspace.active_pane().clone());
6320    let editor_a1 = workspace_a
6321        .update(cx_a, |workspace, cx| {
6322            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
6323        })
6324        .await
6325        .unwrap()
6326        .downcast::<Editor>()
6327        .unwrap();
6328    let editor_a2 = workspace_a
6329        .update(cx_a, |workspace, cx| {
6330            workspace.open_path((worktree_id, "2.txt"), None, true, cx)
6331        })
6332        .await
6333        .unwrap()
6334        .downcast::<Editor>()
6335        .unwrap();
6336
6337    // Client B opens an editor.
6338    let editor_b1 = workspace_b
6339        .update(cx_b, |workspace, cx| {
6340            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
6341        })
6342        .await
6343        .unwrap()
6344        .downcast::<Editor>()
6345        .unwrap();
6346
6347    let peer_id_a = client_a.peer_id().unwrap();
6348    let peer_id_b = client_b.peer_id().unwrap();
6349    let peer_id_c = client_c.peer_id().unwrap();
6350    let peer_id_d = client_d.peer_id().unwrap();
6351
6352    // Client A updates their selections in those editors
6353    editor_a1.update(cx_a, |editor, cx| {
6354        editor.handle_input("a", cx);
6355        editor.handle_input("b", cx);
6356        editor.handle_input("c", cx);
6357        editor.select_left(&Default::default(), cx);
6358        assert_eq!(editor.selections.ranges(cx), vec![3..2]);
6359    });
6360    editor_a2.update(cx_a, |editor, cx| {
6361        editor.handle_input("d", cx);
6362        editor.handle_input("e", cx);
6363        editor.select_left(&Default::default(), cx);
6364        assert_eq!(editor.selections.ranges(cx), vec![2..1]);
6365    });
6366
6367    // When client B starts following client A, all visible view states are replicated to client B.
6368    workspace_b
6369        .update(cx_b, |workspace, cx| {
6370            workspace.toggle_follow(peer_id_a, cx).unwrap()
6371        })
6372        .await
6373        .unwrap();
6374
6375    cx_c.foreground().run_until_parked();
6376    let editor_b2 = workspace_b.read_with(cx_b, |workspace, cx| {
6377        workspace
6378            .active_item(cx)
6379            .unwrap()
6380            .downcast::<Editor>()
6381            .unwrap()
6382    });
6383    assert_eq!(
6384        cx_b.read(|cx| editor_b2.project_path(cx)),
6385        Some((worktree_id, "2.txt").into())
6386    );
6387    assert_eq!(
6388        editor_b2.read_with(cx_b, |editor, cx| editor.selections.ranges(cx)),
6389        vec![2..1]
6390    );
6391    assert_eq!(
6392        editor_b1.read_with(cx_b, |editor, cx| editor.selections.ranges(cx)),
6393        vec![3..2]
6394    );
6395
6396    cx_c.foreground().run_until_parked();
6397    let active_call_c = cx_c.read(ActiveCall::global);
6398    let project_c = client_c.build_remote_project(project_id, cx_c).await;
6399    let workspace_c = client_c.build_workspace(&project_c, cx_c);
6400    active_call_c
6401        .update(cx_c, |call, cx| call.set_location(Some(&project_c), cx))
6402        .await
6403        .unwrap();
6404    drop(project_c);
6405
6406    // Client C also follows client A.
6407    workspace_c
6408        .update(cx_c, |workspace, cx| {
6409            workspace.toggle_follow(peer_id_a, cx).unwrap()
6410        })
6411        .await
6412        .unwrap();
6413
6414    cx_d.foreground().run_until_parked();
6415    let active_call_d = cx_d.read(ActiveCall::global);
6416    let project_d = client_d.build_remote_project(project_id, cx_d).await;
6417    let workspace_d = client_d.build_workspace(&project_d, cx_d);
6418    active_call_d
6419        .update(cx_d, |call, cx| call.set_location(Some(&project_d), cx))
6420        .await
6421        .unwrap();
6422    drop(project_d);
6423
6424    // All clients see that clients B and C are following client A.
6425    cx_c.foreground().run_until_parked();
6426    for (name, active_call, cx) in [
6427        ("A", &active_call_a, &cx_a),
6428        ("B", &active_call_b, &cx_b),
6429        ("C", &active_call_c, &cx_c),
6430        ("D", &active_call_d, &cx_d),
6431    ] {
6432        active_call.read_with(*cx, |call, cx| {
6433            let room = call.room().unwrap().read(cx);
6434            assert_eq!(
6435                room.followers_for(peer_id_a, project_id),
6436                &[peer_id_b, peer_id_c],
6437                "checking followers for A as {name}"
6438            );
6439        });
6440    }
6441
6442    // Client C unfollows client A.
6443    workspace_c.update(cx_c, |workspace, cx| {
6444        workspace.toggle_follow(peer_id_a, cx);
6445    });
6446
6447    // All clients see that clients B is following client A.
6448    cx_c.foreground().run_until_parked();
6449    for (name, active_call, cx) in [
6450        ("A", &active_call_a, &cx_a),
6451        ("B", &active_call_b, &cx_b),
6452        ("C", &active_call_c, &cx_c),
6453        ("D", &active_call_d, &cx_d),
6454    ] {
6455        active_call.read_with(*cx, |call, cx| {
6456            let room = call.room().unwrap().read(cx);
6457            assert_eq!(
6458                room.followers_for(peer_id_a, project_id),
6459                &[peer_id_b],
6460                "checking followers for A as {name}"
6461            );
6462        });
6463    }
6464
6465    // Client C re-follows client A.
6466    workspace_c.update(cx_c, |workspace, cx| {
6467        workspace.toggle_follow(peer_id_a, cx);
6468    });
6469
6470    // All clients see that clients B and C are following client A.
6471    cx_c.foreground().run_until_parked();
6472    for (name, active_call, cx) in [
6473        ("A", &active_call_a, &cx_a),
6474        ("B", &active_call_b, &cx_b),
6475        ("C", &active_call_c, &cx_c),
6476        ("D", &active_call_d, &cx_d),
6477    ] {
6478        active_call.read_with(*cx, |call, cx| {
6479            let room = call.room().unwrap().read(cx);
6480            assert_eq!(
6481                room.followers_for(peer_id_a, project_id),
6482                &[peer_id_b, peer_id_c],
6483                "checking followers for A as {name}"
6484            );
6485        });
6486    }
6487
6488    // Client D follows client C.
6489    workspace_d
6490        .update(cx_d, |workspace, cx| {
6491            workspace.toggle_follow(peer_id_c, cx).unwrap()
6492        })
6493        .await
6494        .unwrap();
6495
6496    // All clients see that D is following C
6497    cx_d.foreground().run_until_parked();
6498    for (name, active_call, cx) in [
6499        ("A", &active_call_a, &cx_a),
6500        ("B", &active_call_b, &cx_b),
6501        ("C", &active_call_c, &cx_c),
6502        ("D", &active_call_d, &cx_d),
6503    ] {
6504        active_call.read_with(*cx, |call, cx| {
6505            let room = call.room().unwrap().read(cx);
6506            assert_eq!(
6507                room.followers_for(peer_id_c, project_id),
6508                &[peer_id_d],
6509                "checking followers for C as {name}"
6510            );
6511        });
6512    }
6513
6514    // Client C closes the project.
6515    cx_c.drop_last(workspace_c);
6516
6517    // Clients A and B see that client B is following A, and client C is not present in the followers.
6518    cx_c.foreground().run_until_parked();
6519    for (name, active_call, cx) in [("A", &active_call_a, &cx_a), ("B", &active_call_b, &cx_b)] {
6520        active_call.read_with(*cx, |call, cx| {
6521            let room = call.room().unwrap().read(cx);
6522            assert_eq!(
6523                room.followers_for(peer_id_a, project_id),
6524                &[peer_id_b],
6525                "checking followers for A as {name}"
6526            );
6527        });
6528    }
6529
6530    // All clients see that no-one is following C
6531    for (name, active_call, cx) in [
6532        ("A", &active_call_a, &cx_a),
6533        ("B", &active_call_b, &cx_b),
6534        ("C", &active_call_c, &cx_c),
6535        ("D", &active_call_d, &cx_d),
6536    ] {
6537        active_call.read_with(*cx, |call, cx| {
6538            let room = call.room().unwrap().read(cx);
6539            assert_eq!(
6540                room.followers_for(peer_id_c, project_id),
6541                &[],
6542                "checking followers for C as {name}"
6543            );
6544        });
6545    }
6546
6547    // When client A activates a different editor, client B does so as well.
6548    workspace_a.update(cx_a, |workspace, cx| {
6549        workspace.activate_item(&editor_a1, cx)
6550    });
6551    deterministic.run_until_parked();
6552    workspace_b.read_with(cx_b, |workspace, cx| {
6553        assert_eq!(workspace.active_item(cx).unwrap().id(), editor_b1.id());
6554    });
6555
6556    // When client A opens a multibuffer, client B does so as well.
6557    let multibuffer_a = cx_a.add_model(|cx| {
6558        let buffer_a1 = project_a.update(cx, |project, cx| {
6559            project
6560                .get_open_buffer(&(worktree_id, "1.txt").into(), cx)
6561                .unwrap()
6562        });
6563        let buffer_a2 = project_a.update(cx, |project, cx| {
6564            project
6565                .get_open_buffer(&(worktree_id, "2.txt").into(), cx)
6566                .unwrap()
6567        });
6568        let mut result = MultiBuffer::new(0);
6569        result.push_excerpts(
6570            buffer_a1,
6571            [ExcerptRange {
6572                context: 0..3,
6573                primary: None,
6574            }],
6575            cx,
6576        );
6577        result.push_excerpts(
6578            buffer_a2,
6579            [ExcerptRange {
6580                context: 4..7,
6581                primary: None,
6582            }],
6583            cx,
6584        );
6585        result
6586    });
6587    let multibuffer_editor_a = workspace_a.update(cx_a, |workspace, cx| {
6588        let editor =
6589            cx.add_view(|cx| Editor::for_multibuffer(multibuffer_a, Some(project_a.clone()), cx));
6590        workspace.add_item(Box::new(editor.clone()), cx);
6591        editor
6592    });
6593    deterministic.run_until_parked();
6594    let multibuffer_editor_b = workspace_b.read_with(cx_b, |workspace, cx| {
6595        workspace
6596            .active_item(cx)
6597            .unwrap()
6598            .downcast::<Editor>()
6599            .unwrap()
6600    });
6601    assert_eq!(
6602        multibuffer_editor_a.read_with(cx_a, |editor, cx| editor.text(cx)),
6603        multibuffer_editor_b.read_with(cx_b, |editor, cx| editor.text(cx)),
6604    );
6605
6606    // When client A navigates back and forth, client B does so as well.
6607    workspace_a
6608        .update(cx_a, |workspace, cx| {
6609            workspace::Pane::go_back(workspace, None, cx)
6610        })
6611        .await
6612        .unwrap();
6613    deterministic.run_until_parked();
6614    workspace_b.read_with(cx_b, |workspace, cx| {
6615        assert_eq!(workspace.active_item(cx).unwrap().id(), editor_b1.id());
6616    });
6617
6618    workspace_a
6619        .update(cx_a, |workspace, cx| {
6620            workspace::Pane::go_back(workspace, None, cx)
6621        })
6622        .await
6623        .unwrap();
6624    deterministic.run_until_parked();
6625    workspace_b.read_with(cx_b, |workspace, cx| {
6626        assert_eq!(workspace.active_item(cx).unwrap().id(), editor_b2.id());
6627    });
6628
6629    workspace_a
6630        .update(cx_a, |workspace, cx| {
6631            workspace::Pane::go_forward(workspace, None, cx)
6632        })
6633        .await
6634        .unwrap();
6635    deterministic.run_until_parked();
6636    workspace_b.read_with(cx_b, |workspace, cx| {
6637        assert_eq!(workspace.active_item(cx).unwrap().id(), editor_b1.id());
6638    });
6639
6640    // Changes to client A's editor are reflected on client B.
6641    editor_a1.update(cx_a, |editor, cx| {
6642        editor.change_selections(None, cx, |s| s.select_ranges([1..1, 2..2]));
6643    });
6644    deterministic.run_until_parked();
6645    editor_b1.read_with(cx_b, |editor, cx| {
6646        assert_eq!(editor.selections.ranges(cx), &[1..1, 2..2]);
6647    });
6648
6649    editor_a1.update(cx_a, |editor, cx| editor.set_text("TWO", cx));
6650    deterministic.run_until_parked();
6651    editor_b1.read_with(cx_b, |editor, cx| assert_eq!(editor.text(cx), "TWO"));
6652
6653    editor_a1.update(cx_a, |editor, cx| {
6654        editor.change_selections(None, cx, |s| s.select_ranges([3..3]));
6655        editor.set_scroll_position(vec2f(0., 100.), cx);
6656    });
6657    deterministic.run_until_parked();
6658    editor_b1.read_with(cx_b, |editor, cx| {
6659        assert_eq!(editor.selections.ranges(cx), &[3..3]);
6660    });
6661
6662    // After unfollowing, client B stops receiving updates from client A.
6663    workspace_b.update(cx_b, |workspace, cx| {
6664        workspace.unfollow(&workspace.active_pane().clone(), cx)
6665    });
6666    workspace_a.update(cx_a, |workspace, cx| {
6667        workspace.activate_item(&editor_a2, cx)
6668    });
6669    deterministic.run_until_parked();
6670    assert_eq!(
6671        workspace_b.read_with(cx_b, |workspace, cx| workspace
6672            .active_item(cx)
6673            .unwrap()
6674            .id()),
6675        editor_b1.id()
6676    );
6677
6678    // Client A starts following client B.
6679    workspace_a
6680        .update(cx_a, |workspace, cx| {
6681            workspace.toggle_follow(peer_id_b, cx).unwrap()
6682        })
6683        .await
6684        .unwrap();
6685    assert_eq!(
6686        workspace_a.read_with(cx_a, |workspace, _| workspace.leader_for_pane(&pane_a)),
6687        Some(peer_id_b)
6688    );
6689    assert_eq!(
6690        workspace_a.read_with(cx_a, |workspace, cx| workspace
6691            .active_item(cx)
6692            .unwrap()
6693            .id()),
6694        editor_a1.id()
6695    );
6696
6697    // Client B activates an external window, which causes a new screen-sharing item to be added to the pane.
6698    let display = MacOSDisplay::new();
6699    active_call_b
6700        .update(cx_b, |call, cx| call.set_location(None, cx))
6701        .await
6702        .unwrap();
6703    active_call_b
6704        .update(cx_b, |call, cx| {
6705            call.room().unwrap().update(cx, |room, cx| {
6706                room.set_display_sources(vec![display.clone()]);
6707                room.share_screen(cx)
6708            })
6709        })
6710        .await
6711        .unwrap();
6712    deterministic.run_until_parked();
6713    let shared_screen = workspace_a.read_with(cx_a, |workspace, cx| {
6714        workspace
6715            .active_item(cx)
6716            .unwrap()
6717            .downcast::<SharedScreen>()
6718            .unwrap()
6719    });
6720
6721    // Client B activates Zed again, which causes the previous editor to become focused again.
6722    active_call_b
6723        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
6724        .await
6725        .unwrap();
6726    deterministic.run_until_parked();
6727    workspace_a.read_with(cx_a, |workspace, cx| {
6728        assert_eq!(workspace.active_item(cx).unwrap().id(), editor_a1.id())
6729    });
6730
6731    // Client B activates a multibuffer that was created by following client A. Client A returns to that multibuffer.
6732    workspace_b.update(cx_b, |workspace, cx| {
6733        workspace.activate_item(&multibuffer_editor_b, cx)
6734    });
6735    deterministic.run_until_parked();
6736    workspace_a.read_with(cx_a, |workspace, cx| {
6737        assert_eq!(
6738            workspace.active_item(cx).unwrap().id(),
6739            multibuffer_editor_a.id()
6740        )
6741    });
6742
6743    // Client B activates an external window again, and the previously-opened screen-sharing item
6744    // gets activated.
6745    active_call_b
6746        .update(cx_b, |call, cx| call.set_location(None, cx))
6747        .await
6748        .unwrap();
6749    deterministic.run_until_parked();
6750    assert_eq!(
6751        workspace_a.read_with(cx_a, |workspace, cx| workspace
6752            .active_item(cx)
6753            .unwrap()
6754            .id()),
6755        shared_screen.id()
6756    );
6757
6758    // Following interrupts when client B disconnects.
6759    client_b.disconnect(&cx_b.to_async());
6760    deterministic.advance_clock(RECONNECT_TIMEOUT);
6761    assert_eq!(
6762        workspace_a.read_with(cx_a, |workspace, _| workspace.leader_for_pane(&pane_a)),
6763        None
6764    );
6765}
6766
6767#[gpui::test(iterations = 10)]
6768async fn test_join_call_after_screen_was_shared(
6769    deterministic: Arc<Deterministic>,
6770    cx_a: &mut TestAppContext,
6771    cx_b: &mut TestAppContext,
6772) {
6773    deterministic.forbid_parking();
6774    let mut server = TestServer::start(&deterministic).await;
6775
6776    let client_a = server.create_client(cx_a, "user_a").await;
6777    let client_b = server.create_client(cx_b, "user_b").await;
6778    server
6779        .make_contacts(&mut [(&client_a, cx_a), (&client_b, cx_b)])
6780        .await;
6781
6782    let active_call_a = cx_a.read(ActiveCall::global);
6783    let active_call_b = cx_b.read(ActiveCall::global);
6784
6785    // Call users B and C from client A.
6786    active_call_a
6787        .update(cx_a, |call, cx| {
6788            call.invite(client_b.user_id().unwrap(), None, cx)
6789        })
6790        .await
6791        .unwrap();
6792    let room_a = active_call_a.read_with(cx_a, |call, _| call.room().unwrap().clone());
6793    deterministic.run_until_parked();
6794    assert_eq!(
6795        room_participants(&room_a, cx_a),
6796        RoomParticipants {
6797            remote: Default::default(),
6798            pending: vec!["user_b".to_string()]
6799        }
6800    );
6801
6802    // User B receives the call.
6803    let mut incoming_call_b = active_call_b.read_with(cx_b, |call, _| call.incoming());
6804    let call_b = incoming_call_b.next().await.unwrap().unwrap();
6805    assert_eq!(call_b.calling_user.github_login, "user_a");
6806
6807    // User A shares their screen
6808    let display = MacOSDisplay::new();
6809    active_call_a
6810        .update(cx_a, |call, cx| {
6811            call.room().unwrap().update(cx, |room, cx| {
6812                room.set_display_sources(vec![display.clone()]);
6813                room.share_screen(cx)
6814            })
6815        })
6816        .await
6817        .unwrap();
6818
6819    client_b.user_store.update(cx_b, |user_store, _| {
6820        user_store.clear_cache();
6821    });
6822
6823    // User B joins the room
6824    active_call_b
6825        .update(cx_b, |call, cx| call.accept_incoming(cx))
6826        .await
6827        .unwrap();
6828    let room_b = active_call_b.read_with(cx_b, |call, _| call.room().unwrap().clone());
6829    assert!(incoming_call_b.next().await.unwrap().is_none());
6830
6831    deterministic.run_until_parked();
6832    assert_eq!(
6833        room_participants(&room_a, cx_a),
6834        RoomParticipants {
6835            remote: vec!["user_b".to_string()],
6836            pending: vec![],
6837        }
6838    );
6839    assert_eq!(
6840        room_participants(&room_b, cx_b),
6841        RoomParticipants {
6842            remote: vec!["user_a".to_string()],
6843            pending: vec![],
6844        }
6845    );
6846
6847    // Ensure User B sees User A's screenshare.
6848    room_b.read_with(cx_b, |room, _| {
6849        assert_eq!(
6850            room.remote_participants()
6851                .get(&client_a.user_id().unwrap())
6852                .unwrap()
6853                .tracks
6854                .len(),
6855            1
6856        );
6857    });
6858}
6859
6860#[gpui::test]
6861async fn test_following_tab_order(
6862    deterministic: Arc<Deterministic>,
6863    cx_a: &mut TestAppContext,
6864    cx_b: &mut TestAppContext,
6865) {
6866    let mut server = TestServer::start(&deterministic).await;
6867    let client_a = server.create_client(cx_a, "user_a").await;
6868    let client_b = server.create_client(cx_b, "user_b").await;
6869    server
6870        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
6871        .await;
6872    let active_call_a = cx_a.read(ActiveCall::global);
6873    let active_call_b = cx_b.read(ActiveCall::global);
6874
6875    cx_a.update(editor::init);
6876    cx_b.update(editor::init);
6877
6878    client_a
6879        .fs
6880        .insert_tree(
6881            "/a",
6882            json!({
6883                "1.txt": "one",
6884                "2.txt": "two",
6885                "3.txt": "three",
6886            }),
6887        )
6888        .await;
6889    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
6890    active_call_a
6891        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
6892        .await
6893        .unwrap();
6894
6895    let project_id = active_call_a
6896        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
6897        .await
6898        .unwrap();
6899    let project_b = client_b.build_remote_project(project_id, cx_b).await;
6900    active_call_b
6901        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
6902        .await
6903        .unwrap();
6904
6905    let workspace_a = client_a.build_workspace(&project_a, cx_a);
6906    let pane_a = workspace_a.read_with(cx_a, |workspace, _| workspace.active_pane().clone());
6907
6908    let workspace_b = client_b.build_workspace(&project_b, cx_b);
6909    let pane_b = workspace_b.read_with(cx_b, |workspace, _| workspace.active_pane().clone());
6910
6911    let client_b_id = project_a.read_with(cx_a, |project, _| {
6912        project.collaborators().values().next().unwrap().peer_id
6913    });
6914
6915    //Open 1, 3 in that order on client A
6916    workspace_a
6917        .update(cx_a, |workspace, cx| {
6918            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
6919        })
6920        .await
6921        .unwrap();
6922    workspace_a
6923        .update(cx_a, |workspace, cx| {
6924            workspace.open_path((worktree_id, "3.txt"), None, true, cx)
6925        })
6926        .await
6927        .unwrap();
6928
6929    let pane_paths = |pane: &ViewHandle<workspace::Pane>, cx: &mut TestAppContext| {
6930        pane.update(cx, |pane, cx| {
6931            pane.items()
6932                .map(|item| {
6933                    item.project_path(cx)
6934                        .unwrap()
6935                        .path
6936                        .to_str()
6937                        .unwrap()
6938                        .to_owned()
6939                })
6940                .collect::<Vec<_>>()
6941        })
6942    };
6943
6944    //Verify that the tabs opened in the order we expect
6945    assert_eq!(&pane_paths(&pane_a, cx_a), &["1.txt", "3.txt"]);
6946
6947    //Follow client B as client A
6948    workspace_a
6949        .update(cx_a, |workspace, cx| {
6950            workspace.toggle_follow(client_b_id, cx).unwrap()
6951        })
6952        .await
6953        .unwrap();
6954
6955    //Open just 2 on client B
6956    workspace_b
6957        .update(cx_b, |workspace, cx| {
6958            workspace.open_path((worktree_id, "2.txt"), None, true, cx)
6959        })
6960        .await
6961        .unwrap();
6962    deterministic.run_until_parked();
6963
6964    // Verify that newly opened followed file is at the end
6965    assert_eq!(&pane_paths(&pane_a, cx_a), &["1.txt", "3.txt", "2.txt"]);
6966
6967    //Open just 1 on client B
6968    workspace_b
6969        .update(cx_b, |workspace, cx| {
6970            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
6971        })
6972        .await
6973        .unwrap();
6974    assert_eq!(&pane_paths(&pane_b, cx_b), &["2.txt", "1.txt"]);
6975    deterministic.run_until_parked();
6976
6977    // Verify that following into 1 did not reorder
6978    assert_eq!(&pane_paths(&pane_a, cx_a), &["1.txt", "3.txt", "2.txt"]);
6979}
6980
6981#[gpui::test(iterations = 10)]
6982async fn test_peers_following_each_other(
6983    deterministic: Arc<Deterministic>,
6984    cx_a: &mut TestAppContext,
6985    cx_b: &mut TestAppContext,
6986) {
6987    deterministic.forbid_parking();
6988    let mut server = TestServer::start(&deterministic).await;
6989    let client_a = server.create_client(cx_a, "user_a").await;
6990    let client_b = server.create_client(cx_b, "user_b").await;
6991    server
6992        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
6993        .await;
6994    let active_call_a = cx_a.read(ActiveCall::global);
6995    let active_call_b = cx_b.read(ActiveCall::global);
6996
6997    cx_a.update(editor::init);
6998    cx_b.update(editor::init);
6999
7000    // Client A shares a project.
7001    client_a
7002        .fs
7003        .insert_tree(
7004            "/a",
7005            json!({
7006                "1.txt": "one",
7007                "2.txt": "two",
7008                "3.txt": "three",
7009                "4.txt": "four",
7010            }),
7011        )
7012        .await;
7013    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
7014    active_call_a
7015        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
7016        .await
7017        .unwrap();
7018    let project_id = active_call_a
7019        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
7020        .await
7021        .unwrap();
7022
7023    // Client B joins the project.
7024    let project_b = client_b.build_remote_project(project_id, cx_b).await;
7025    active_call_b
7026        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
7027        .await
7028        .unwrap();
7029
7030    // Client A opens some editors.
7031    let workspace_a = client_a.build_workspace(&project_a, cx_a);
7032    let pane_a1 = workspace_a.read_with(cx_a, |workspace, _| workspace.active_pane().clone());
7033    let _editor_a1 = workspace_a
7034        .update(cx_a, |workspace, cx| {
7035            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
7036        })
7037        .await
7038        .unwrap()
7039        .downcast::<Editor>()
7040        .unwrap();
7041
7042    // Client B opens an editor.
7043    let workspace_b = client_b.build_workspace(&project_b, cx_b);
7044    let pane_b1 = workspace_b.read_with(cx_b, |workspace, _| workspace.active_pane().clone());
7045    let _editor_b1 = workspace_b
7046        .update(cx_b, |workspace, cx| {
7047            workspace.open_path((worktree_id, "2.txt"), None, true, cx)
7048        })
7049        .await
7050        .unwrap()
7051        .downcast::<Editor>()
7052        .unwrap();
7053
7054    // Clients A and B follow each other in split panes
7055    workspace_a.update(cx_a, |workspace, cx| {
7056        workspace.split_pane(workspace.active_pane().clone(), SplitDirection::Right, cx);
7057    });
7058    workspace_a
7059        .update(cx_a, |workspace, cx| {
7060            assert_ne!(*workspace.active_pane(), pane_a1);
7061            let leader_id = *project_a.read(cx).collaborators().keys().next().unwrap();
7062            workspace.toggle_follow(leader_id, cx).unwrap()
7063        })
7064        .await
7065        .unwrap();
7066    workspace_b.update(cx_b, |workspace, cx| {
7067        workspace.split_pane(workspace.active_pane().clone(), SplitDirection::Right, cx);
7068    });
7069    workspace_b
7070        .update(cx_b, |workspace, cx| {
7071            assert_ne!(*workspace.active_pane(), pane_b1);
7072            let leader_id = *project_b.read(cx).collaborators().keys().next().unwrap();
7073            workspace.toggle_follow(leader_id, cx).unwrap()
7074        })
7075        .await
7076        .unwrap();
7077
7078    workspace_a.update(cx_a, |workspace, cx| {
7079        workspace.activate_next_pane(cx);
7080    });
7081    // Wait for focus effects to be fully flushed
7082    workspace_a.update(cx_a, |workspace, _| {
7083        assert_eq!(*workspace.active_pane(), pane_a1);
7084    });
7085
7086    workspace_a
7087        .update(cx_a, |workspace, cx| {
7088            workspace.open_path((worktree_id, "3.txt"), None, true, cx)
7089        })
7090        .await
7091        .unwrap();
7092    workspace_b.update(cx_b, |workspace, cx| {
7093        workspace.activate_next_pane(cx);
7094    });
7095
7096    workspace_b
7097        .update(cx_b, |workspace, cx| {
7098            assert_eq!(*workspace.active_pane(), pane_b1);
7099            workspace.open_path((worktree_id, "4.txt"), None, true, cx)
7100        })
7101        .await
7102        .unwrap();
7103    cx_a.foreground().run_until_parked();
7104
7105    // Ensure leader updates don't change the active pane of followers
7106    workspace_a.read_with(cx_a, |workspace, _| {
7107        assert_eq!(*workspace.active_pane(), pane_a1);
7108    });
7109    workspace_b.read_with(cx_b, |workspace, _| {
7110        assert_eq!(*workspace.active_pane(), pane_b1);
7111    });
7112
7113    // Ensure peers following each other doesn't cause an infinite loop.
7114    assert_eq!(
7115        workspace_a.read_with(cx_a, |workspace, cx| workspace
7116            .active_item(cx)
7117            .unwrap()
7118            .project_path(cx)),
7119        Some((worktree_id, "3.txt").into())
7120    );
7121    workspace_a.update(cx_a, |workspace, cx| {
7122        assert_eq!(
7123            workspace.active_item(cx).unwrap().project_path(cx),
7124            Some((worktree_id, "3.txt").into())
7125        );
7126        workspace.activate_next_pane(cx);
7127    });
7128
7129    workspace_a.update(cx_a, |workspace, cx| {
7130        assert_eq!(
7131            workspace.active_item(cx).unwrap().project_path(cx),
7132            Some((worktree_id, "4.txt").into())
7133        );
7134    });
7135
7136    workspace_b.update(cx_b, |workspace, cx| {
7137        assert_eq!(
7138            workspace.active_item(cx).unwrap().project_path(cx),
7139            Some((worktree_id, "4.txt").into())
7140        );
7141        workspace.activate_next_pane(cx);
7142    });
7143
7144    workspace_b.update(cx_b, |workspace, cx| {
7145        assert_eq!(
7146            workspace.active_item(cx).unwrap().project_path(cx),
7147            Some((worktree_id, "3.txt").into())
7148        );
7149    });
7150}
7151
7152#[gpui::test(iterations = 10)]
7153async fn test_auto_unfollowing(
7154    deterministic: Arc<Deterministic>,
7155    cx_a: &mut TestAppContext,
7156    cx_b: &mut TestAppContext,
7157) {
7158    deterministic.forbid_parking();
7159
7160    // 2 clients connect to a server.
7161    let mut server = TestServer::start(&deterministic).await;
7162    let client_a = server.create_client(cx_a, "user_a").await;
7163    let client_b = server.create_client(cx_b, "user_b").await;
7164    server
7165        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
7166        .await;
7167    let active_call_a = cx_a.read(ActiveCall::global);
7168    let active_call_b = cx_b.read(ActiveCall::global);
7169
7170    cx_a.update(editor::init);
7171    cx_b.update(editor::init);
7172
7173    // Client A shares a project.
7174    client_a
7175        .fs
7176        .insert_tree(
7177            "/a",
7178            json!({
7179                "1.txt": "one",
7180                "2.txt": "two",
7181                "3.txt": "three",
7182            }),
7183        )
7184        .await;
7185    let (project_a, worktree_id) = client_a.build_local_project("/a", cx_a).await;
7186    active_call_a
7187        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
7188        .await
7189        .unwrap();
7190
7191    let project_id = active_call_a
7192        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
7193        .await
7194        .unwrap();
7195    let project_b = client_b.build_remote_project(project_id, cx_b).await;
7196    active_call_b
7197        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
7198        .await
7199        .unwrap();
7200
7201    // Client A opens some editors.
7202    let workspace_a = client_a.build_workspace(&project_a, cx_a);
7203    let _editor_a1 = workspace_a
7204        .update(cx_a, |workspace, cx| {
7205            workspace.open_path((worktree_id, "1.txt"), None, true, cx)
7206        })
7207        .await
7208        .unwrap()
7209        .downcast::<Editor>()
7210        .unwrap();
7211
7212    // Client B starts following client A.
7213    let workspace_b = client_b.build_workspace(&project_b, cx_b);
7214    let pane_b = workspace_b.read_with(cx_b, |workspace, _| workspace.active_pane().clone());
7215    let leader_id = project_b.read_with(cx_b, |project, _| {
7216        project.collaborators().values().next().unwrap().peer_id
7217    });
7218    workspace_b
7219        .update(cx_b, |workspace, cx| {
7220            workspace.toggle_follow(leader_id, cx).unwrap()
7221        })
7222        .await
7223        .unwrap();
7224    assert_eq!(
7225        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7226        Some(leader_id)
7227    );
7228    let editor_b2 = workspace_b.read_with(cx_b, |workspace, cx| {
7229        workspace
7230            .active_item(cx)
7231            .unwrap()
7232            .downcast::<Editor>()
7233            .unwrap()
7234    });
7235
7236    // When client B moves, it automatically stops following client A.
7237    editor_b2.update(cx_b, |editor, cx| editor.move_right(&editor::MoveRight, cx));
7238    assert_eq!(
7239        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7240        None
7241    );
7242
7243    workspace_b
7244        .update(cx_b, |workspace, cx| {
7245            workspace.toggle_follow(leader_id, cx).unwrap()
7246        })
7247        .await
7248        .unwrap();
7249    assert_eq!(
7250        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7251        Some(leader_id)
7252    );
7253
7254    // When client B edits, it automatically stops following client A.
7255    editor_b2.update(cx_b, |editor, cx| editor.insert("X", cx));
7256    assert_eq!(
7257        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7258        None
7259    );
7260
7261    workspace_b
7262        .update(cx_b, |workspace, cx| {
7263            workspace.toggle_follow(leader_id, cx).unwrap()
7264        })
7265        .await
7266        .unwrap();
7267    assert_eq!(
7268        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7269        Some(leader_id)
7270    );
7271
7272    // When client B scrolls, it automatically stops following client A.
7273    editor_b2.update(cx_b, |editor, cx| {
7274        editor.set_scroll_position(vec2f(0., 3.), cx)
7275    });
7276    assert_eq!(
7277        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7278        None
7279    );
7280
7281    workspace_b
7282        .update(cx_b, |workspace, cx| {
7283            workspace.toggle_follow(leader_id, cx).unwrap()
7284        })
7285        .await
7286        .unwrap();
7287    assert_eq!(
7288        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7289        Some(leader_id)
7290    );
7291
7292    // When client B activates a different pane, it continues following client A in the original pane.
7293    workspace_b.update(cx_b, |workspace, cx| {
7294        workspace.split_pane(pane_b.clone(), SplitDirection::Right, cx)
7295    });
7296    assert_eq!(
7297        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7298        Some(leader_id)
7299    );
7300
7301    workspace_b.update(cx_b, |workspace, cx| workspace.activate_next_pane(cx));
7302    assert_eq!(
7303        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7304        Some(leader_id)
7305    );
7306
7307    // When client B activates a different item in the original pane, it automatically stops following client A.
7308    workspace_b
7309        .update(cx_b, |workspace, cx| {
7310            workspace.open_path((worktree_id, "2.txt"), None, true, cx)
7311        })
7312        .await
7313        .unwrap();
7314    assert_eq!(
7315        workspace_b.read_with(cx_b, |workspace, _| workspace.leader_for_pane(&pane_b)),
7316        None
7317    );
7318}
7319
7320#[gpui::test(iterations = 10)]
7321async fn test_peers_simultaneously_following_each_other(
7322    deterministic: Arc<Deterministic>,
7323    cx_a: &mut TestAppContext,
7324    cx_b: &mut TestAppContext,
7325) {
7326    deterministic.forbid_parking();
7327
7328    let mut server = TestServer::start(&deterministic).await;
7329    let client_a = server.create_client(cx_a, "user_a").await;
7330    let client_b = server.create_client(cx_b, "user_b").await;
7331    server
7332        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
7333        .await;
7334    let active_call_a = cx_a.read(ActiveCall::global);
7335
7336    cx_a.update(editor::init);
7337    cx_b.update(editor::init);
7338
7339    client_a.fs.insert_tree("/a", json!({})).await;
7340    let (project_a, _) = client_a.build_local_project("/a", cx_a).await;
7341    let workspace_a = client_a.build_workspace(&project_a, cx_a);
7342    let project_id = active_call_a
7343        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
7344        .await
7345        .unwrap();
7346
7347    let project_b = client_b.build_remote_project(project_id, cx_b).await;
7348    let workspace_b = client_b.build_workspace(&project_b, cx_b);
7349
7350    deterministic.run_until_parked();
7351    let client_a_id = project_b.read_with(cx_b, |project, _| {
7352        project.collaborators().values().next().unwrap().peer_id
7353    });
7354    let client_b_id = project_a.read_with(cx_a, |project, _| {
7355        project.collaborators().values().next().unwrap().peer_id
7356    });
7357
7358    let a_follow_b = workspace_a.update(cx_a, |workspace, cx| {
7359        workspace.toggle_follow(client_b_id, cx).unwrap()
7360    });
7361    let b_follow_a = workspace_b.update(cx_b, |workspace, cx| {
7362        workspace.toggle_follow(client_a_id, cx).unwrap()
7363    });
7364
7365    futures::try_join!(a_follow_b, b_follow_a).unwrap();
7366    workspace_a.read_with(cx_a, |workspace, _| {
7367        assert_eq!(
7368            workspace.leader_for_pane(workspace.active_pane()),
7369            Some(client_b_id)
7370        );
7371    });
7372    workspace_b.read_with(cx_b, |workspace, _| {
7373        assert_eq!(
7374            workspace.leader_for_pane(workspace.active_pane()),
7375            Some(client_a_id)
7376        );
7377    });
7378}
7379
7380#[derive(Debug, Eq, PartialEq)]
7381struct RoomParticipants {
7382    remote: Vec<String>,
7383    pending: Vec<String>,
7384}
7385
7386fn room_participants(room: &ModelHandle<Room>, cx: &mut TestAppContext) -> RoomParticipants {
7387    room.read_with(cx, |room, _| {
7388        let mut remote = room
7389            .remote_participants()
7390            .iter()
7391            .map(|(_, participant)| participant.user.github_login.clone())
7392            .collect::<Vec<_>>();
7393        let mut pending = room
7394            .pending_participants()
7395            .iter()
7396            .map(|user| user.github_login.clone())
7397            .collect::<Vec<_>>();
7398        remote.sort();
7399        pending.sort();
7400        RoomParticipants { remote, pending }
7401    })
7402}