Fix test that wasn't properly verifying disconnection from livekit

crates/collab/src/tests/integration_tests.rs

@@ -166,9 +166,67 @@ async fn test_basic_calls(
         }
     );
 
+    // Call user C again from user A.
+    active_call_a
+        .update(cx_a, |call, cx| {
+            call.invite(client_c.user_id().unwrap(), None, cx)
+        })
+        .await
+        .unwrap();
+
+    deterministic.run_until_parked();
+    assert_eq!(
+        room_participants(&room_a, cx_a),
+        RoomParticipants {
+            remote: vec!["user_b".to_string()],
+            pending: vec!["user_c".to_string()]
+        }
+    );
+    assert_eq!(
+        room_participants(&room_b, cx_b),
+        RoomParticipants {
+            remote: vec!["user_a".to_string()],
+            pending: vec!["user_c".to_string()]
+        }
+    );
+
+    // User C accepts the call.
+    let call_c = incoming_call_c.next().await.unwrap().unwrap();
+    assert_eq!(call_c.calling_user.github_login, "user_a");
+    active_call_c
+        .update(cx_c, |call, cx| call.accept_incoming(cx))
+        .await
+        .unwrap();
+    assert!(incoming_call_c.next().await.unwrap().is_none());
+    let room_c = active_call_c.read_with(cx_c, |call, _| call.room().unwrap().clone());
+
+    deterministic.run_until_parked();
+    assert_eq!(
+        room_participants(&room_a, cx_a),
+        RoomParticipants {
+            remote: vec!["user_b".to_string(), "user_c".to_string()],
+            pending: Default::default()
+        }
+    );
+    assert_eq!(
+        room_participants(&room_b, cx_b),
+        RoomParticipants {
+            remote: vec!["user_a".to_string(), "user_c".to_string()],
+            pending: Default::default()
+        }
+    );
+    assert_eq!(
+        room_participants(&room_c, cx_c),
+        RoomParticipants {
+            remote: vec!["user_a".to_string(), "user_b".to_string()],
+            pending: Default::default()
+        }
+    );
+
     // User A shares their screen
     let display = MacOSDisplay::new();
     let events_b = active_call_events(cx_b);
+    let events_c = active_call_events(cx_c);
     active_call_a
         .update(cx_a, |call, cx| {
             call.room().unwrap().update(cx, |room, cx| {
@@ -181,9 +239,10 @@ async fn test_basic_calls(
 
     deterministic.run_until_parked();
 
+    // User B observes the remote screen sharing track.
     assert_eq!(events_b.borrow().len(), 1);
-    let event = events_b.borrow().first().unwrap().clone();
-    if let call::room::Event::RemoteVideoTracksChanged { participant_id } = event {
+    let event_b = events_b.borrow().first().unwrap().clone();
+    if let call::room::Event::RemoteVideoTracksChanged { participant_id } = event_b {
         assert_eq!(participant_id, client_a.peer_id().unwrap());
         room_b.read_with(cx_b, |room, _| {
             assert_eq!(
@@ -197,6 +256,23 @@ async fn test_basic_calls(
         panic!("unexpected event")
     }
 
+    // User C observes the remote screen sharing track.
+    assert_eq!(events_c.borrow().len(), 1);
+    let event_c = events_c.borrow().first().unwrap().clone();
+    if let call::room::Event::RemoteVideoTracksChanged { participant_id } = event_c {
+        assert_eq!(participant_id, client_a.peer_id().unwrap());
+        room_c.read_with(cx_c, |room, _| {
+            assert_eq!(
+                room.remote_participants()[&client_a.user_id().unwrap()]
+                    .tracks
+                    .len(),
+                1
+            );
+        });
+    } else {
+        panic!("unexpected event")
+    }
+
     // User A leaves the room.
     active_call_a.update(cx_a, |call, cx| {
         call.hang_up(cx).unwrap();
@@ -213,18 +289,28 @@ async fn test_basic_calls(
     assert_eq!(
         room_participants(&room_b, cx_b),
         RoomParticipants {
-            remote: Default::default(),
+            remote: vec!["user_c".to_string()],
+            pending: Default::default()
+        }
+    );
+    assert_eq!(
+        room_participants(&room_c, cx_c),
+        RoomParticipants {
+            remote: vec!["user_b".to_string()],
             pending: Default::default()
         }
     );
 
     // User B gets disconnected from the LiveKit server, which causes them
-    // to automatically leave the room.
+    // to automatically leave the room. User C leaves the room as well because
+    // nobody else is in there.
     server
         .test_live_kit_server
-        .disconnect_client(client_b.peer_id().unwrap().to_string())
+        .disconnect_client(client_b.user_id().unwrap().to_string())
         .await;
-    active_call_b.update(cx_b, |call, _| assert!(call.room().is_none()));
+    deterministic.run_until_parked();
+    active_call_b.read_with(cx_b, |call, _| assert!(call.room().is_none()));
+    active_call_c.read_with(cx_c, |call, _| assert!(call.room().is_none()));
     assert_eq!(
         room_participants(&room_a, cx_a),
         RoomParticipants {
@@ -239,6 +325,13 @@ async fn test_basic_calls(
             pending: Default::default()
         }
     );
+    assert_eq!(
+        room_participants(&room_c, cx_c),
+        RoomParticipants {
+            remote: Default::default(),
+            pending: Default::default()
+        }
+    );
 }
 
 #[gpui::test(iterations = 10)]
@@ -2572,7 +2665,7 @@ async fn test_fs_operations(
         .await
         .unwrap();
     deterministic.run_until_parked();
-    
+
     worktree_a.read_with(cx_a, |worktree, _| {
         assert_eq!(
             worktree