public async Task SolutionClosing_StopsActiveWork()
{
// Arrange
var workspaceStateGenerator = new TestProjectWorkspaceStateGenerator();
var detector = new WorkspaceProjectStateChangeDetector(workspaceStateGenerator, Dispatcher, WorkQueue);
WorkQueueTestAccessor.BlockBackgroundWorkStart = new ManualResetEventSlim(initialState: false);
WorkQueueTestAccessor.NotifyBackgroundWorkStarting = new ManualResetEventSlim(initialState: false);
Workspace.TryApplyChanges(SolutionWithTwoProjects);
var projectManager = new TestProjectSnapshotManager(Dispatcher, new[] { detector }, Workspace);
await Dispatcher.RunOnDispatcherThreadAsync(() => projectManager.ProjectAdded(HostProjectOne), CancellationToken.None).ConfigureAwait(false);
workspaceStateGenerator.ClearQueue();
WorkQueueTestAccessor.NotifyBackgroundWorkStarting.Wait();
// Act
await Dispatcher.RunOnDispatcherThreadAsync(() =>
{
projectManager.SolutionClosed();
// Trigger a project removed event while solution is closing to clear state.
projectManager.ProjectRemoved(HostProjectOne);
}, CancellationToken.None).ConfigureAwait(false);
// Assert
//
// The change hasn't come through yet.
Assert.Empty(workspaceStateGenerator.UpdateQueue);
WorkQueueTestAccessor.BlockBackgroundWorkStart.Set();
WorkQueueTestAccessor.NotifyBackgroundWorkCompleted.Wait();
Assert.Empty(workspaceStateGenerator.UpdateQueue);
}