public async Task ProcessDocument_LongDocumentParse_DoesNotUpdateAfterSuppress()
{
// Arrange
var projectManager = new TestProjectSnapshotManager(Dispatcher, Workspace);
projectManager.ProjectAdded(HostProject1);
// We utilize a task completion source here so we can "fake" a document parse taking a significant amount of time
var tcs = new TaskCompletionSource <TextAndVersion>();
var textLoader = new Mock <TextLoader>(MockBehavior.Strict);
textLoader.Setup(loader => loader.LoadTextAndVersionAsync(It.IsAny <Workspace>(), It.IsAny <DocumentId>(), It.IsAny <CancellationToken>()))
.Returns(tcs.Task);
var hostDocument = Documents[0];
var project = projectManager.GetLoadedProject(HostProject1.FilePath);
var queue = new BackgroundDocumentGenerator(Dispatcher, DynamicFileInfoProvider)
{
Delay = TimeSpan.FromMilliseconds(1),
NotifyBackgroundWorkCompleted = new ManualResetEventSlim(initialState: false),
NotifyBackgroundCapturedWorkload = new ManualResetEventSlim(initialState: false),
};
queue.Initialize(projectManager);
// We trigger enqueued notifications via adding/opening to the project manager
projectManager.AllowNotifyListeners = true;
// Act & Assert
projectManager.DocumentAdded(HostProject1, hostDocument, textLoader.Object);
queue.NotifyBackgroundCapturedWorkload.Wait();
projectManager.DocumentOpened(HostProject1.FilePath, hostDocument.FilePath, SourceText.From(string.Empty));
// Verify document was suppressed because it was opened
Assert.Null(DynamicFileInfoProvider.DynamicDocuments[hostDocument.FilePath]);
// Unblock document processing
tcs.SetResult(TextAndVersion.Create(SourceText.From(string.Empty), VersionStamp.Default));
await Task.Run(() => queue.NotifyBackgroundWorkCompleted.Wait(TimeSpan.FromSeconds(3)));
// Validate that even though document parsing took a significant amount of time that the dynamic document wasn't "unsuppressed"
Assert.Null(DynamicFileInfoProvider.DynamicDocuments[hostDocument.FilePath]);
}