public async Task Update_List_On_OnDeleteAsync() { var dbContext = HelperClass.CreateInMemoryDB(HelperClass.CreateItems()); CalendarRepository calendarRepository = new CalendarRepository(dbContext); CalendarViewModel viewModel = new CalendarViewModel(calendarRepository, null); var items = viewModel.SelectedEntrie; Assert.Equal(3, viewModel.CalendarEntries.Count); await viewModel.DeleteEntrieAsync(); Assert.Equal(2, viewModel.CalendarEntries.Count); }