I'm having some problems unit testing async methods.
Here's my unit test code:
[TestMethod] public async Task TestRefreshList_RefreshesList() { int countBeforeAdd = listViewModel.NotesTitles.Count; // Add a note. await listViewModel.NoteRepository.AddNoteAsync(new Note { Title = String.Empty, Content = String.Empty }); // Refresh. await listViewModel.RefreshList(); int countAfterAdd = listViewModel.NotesTitles.Count; // Assert that the count increased by 1 and that it matches the count of the repository. Assert.IsTrue(countAfterAdd == countBeforeAdd + 1 && countAfterAdd == mockNoteRepository.FakeNotes.Count); } When I run this test, it appears to never get past the first await statement. If it helps, here are the methods under test:
public ObservableCollection<Note> FakeNotes { get; set; } public Task AddNoteAsync(Models.Note note) { return new Task(() => { FakeNotes.Add(note); }); } public Task<ObservableCollection<string>> GetAllNoteTitlesAsync() { // Return the titles of the notes in the FakeNotes collection. return new Task<ObservableCollection<string>>(() => { return new ObservableCollection<string>(FakeNotes.Select(n => n.Title)); }); } ....
public async Task RefreshList() { try { NotesTitles = await NoteRepository.GetAllNoteTitlesAsync(); } catch (Exception) { Notifier.Notify("We encountered an error when trying to load your notes. Please try again. ", "Ooops!"); } } Any help would be appreciated. Thanks.
