public void parse_error_message_is_null_if_a_document_is_successfully_parsed_after_one_fails_to_parse()
{
var badDocument = @"# First Program
## First Exercise
whatever!";
var goodDocument = "# First Program";
var documents = new Subject<string>();
var exerciseDocumentService = new ExerciseDocumentServiceMock();
var scheduler = new TestScheduler();
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(documents);
var sut = new ExerciseProgramsViewModelBuilder()
.WithExerciseDocumentService(exerciseDocumentService)
.WithScheduler(scheduler)
.Build();
documents.OnNext(badDocument);
scheduler.AdvanceMinimal();
Assert.NotNull(sut.ParseErrorMessage);
documents.OnNext(goodDocument);
scheduler.AdvanceMinimal();
Assert.Null(sut.ParseErrorMessage);
}
public void programs_is_populated_from_cache_whilst_document_from_cloud_loads()
{
var cacheDocument = "# First Program";
var cloudDocument = @"
# First Program
# Second Program";
var scheduler = new TestScheduler();
var exerciseDocumentService = new ExerciseDocumentServiceMock(MockBehavior.Loose);
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(
Observable
.Return(cloudDocument)
.Delay(TimeSpan.FromSeconds(3), scheduler));
var sut = new ExerciseProgramsViewModelBuilder()
.WithExerciseDocumentService(exerciseDocumentService)
.WithCachedDocument(cacheDocument)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
scheduler.AdvanceBy(TimeSpan.FromSeconds(2));
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
scheduler.AdvanceBy(TimeSpan.FromSeconds(2));
Assert.NotNull(sut.Programs);
Assert.Equal(2, sut.Programs.Count);
}
public void status_is_load_failed_if_the_document_fails_to_load_altogether()
{
var exerciseDocumentService = new ExerciseDocumentServiceMock();
var scheduler = new TestScheduler();
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(Observable.Throw<string>(new InvalidOperationException()));
var sut = new ExerciseProgramsViewModelBuilder()
.WithExerciseDocumentService(exerciseDocumentService)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadFailed, sut.Status);
}
public ExerciseProgramsViewModelBuilder WithCloudDocument(string cloudDocument)
{
var exerciseDocumentService = new ExerciseDocumentServiceMock(MockBehavior.Loose);
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(Observable.Return(cloudDocument));
return this.WithExerciseDocumentService(exerciseDocumentService);
}