public void document_is_not_stored_in_cache_if_loaded_from_cache()
{
var document = "# First Program";
var scheduler = new TestSchedulerService();
var stateService = new StateServiceMock();
stateService
.When(x => x.GetAsync <string>(It.IsAny <string>()))
.Return(Observable.Return(document));
stateService
.When(x => x.SetAsync <string>(It.IsAny <string>(), It.IsAny <string>()))
.Return(Observable.Return(Unit.Default));
var sut = new ExerciseProgramsViewModelBuilder()
.WithSchedulerService(scheduler)
.WithStateService(stateService)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromCache, sut.Status);
stateService
.Verify(x => x.SetAsync <string>("ExerciseProgramsDocument", document))
.WasNotCalled();
}
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 TestSchedulerService();
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(documents);
var sut = new ExerciseProgramsViewModelBuilder()
.WithExerciseDocumentService(exerciseDocumentService)
.WithSchedulerService(scheduler)
.Build();
documents.OnNext(badDocument);
scheduler.AdvanceMinimal();
Assert.NotNull(sut.ParseErrorMessage);
documents.OnNext(goodDocument);
scheduler.AdvanceMinimal();
Assert.Null(sut.ParseErrorMessage);
}
public void parse_error_message_is_null_by_default()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
Assert.Null(sut.ParseErrorMessage);
}
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_null_if_both_cache_and_cloud_are_empty()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
Assert.Null(sut.Programs);
}
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 parse_error_message_is_null_by_default()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
Assert.Null(sut.ParseErrorMessage);
}
public void status_is_loaded_from_cloud_if_document_is_successfully_loaded_from_cloud()
{
var document = "# First Program";
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.Build();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromService, sut.Status);
}
public void programs_is_populated_from_cache_if_cache_is_populated_and_cloud_is_empty()
{
var document = "# First Program";
var sut = new ExerciseProgramsViewModelBuilder()
.WithCachedDocument(document)
.Build();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
}
public void programs_is_null_if_both_cache_and_cloud_are_empty()
{
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Null(sut.Programs);
}
public void programs_yields_any_successfully_parsed_programs()
{
var document = "# First Program";
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.Build();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
Assert.Equal("First Program", sut.Programs.ElementAt(0).Name);
}
public void status_is_loaded_from_cache_if_document_is_successfully_loaded_from_cache()
{
var document = "# First Program";
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCachedDocument(document)
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromCache, sut.Status);
}
public void status_is_parse_failed_if_the_document_could_not_be_parsed()
{
var document = @"# First Program
## First Exercise
whatever!";
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.Build();
Assert.Equal(ExerciseProgramsViewModelStatus.ParseFailed, sut.Status);
}
public void status_is_load_failed_if_the_document_fails_to_load_altogether()
{
var exerciseDocumentService = new ExerciseDocumentServiceMock();
exerciseDocumentService
.When(x => x.ExerciseDocument)
.Return(Observable.Throw <string>(new InvalidOperationException()));
var sut = new ExerciseProgramsViewModelBuilder()
.WithExerciseDocumentService(exerciseDocumentService)
.Build();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadFailed, sut.Status);
}
public void programs_is_populated_from_cloud_if_cache_is_empty_and_cloud_is_populated()
{
var document = "# First Program";
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
}
public void programs_yields_any_successfully_parsed_programs()
{
var document = "# First Program";
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
Assert.Equal("First Program", sut.Programs.ElementAt(0).Name);
}
public void parse_error_message_returns_appropriate_message_if_the_document_could_not_be_parsed()
{
var document = @"# First Program
## First Exercise
whatever!";
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.Build();
Assert.NotNull(sut.ParseErrorMessage);
Assert.Equal("Parsing failure: unexpected '#'; expected end of input (Line 3, Column 1); recently consumed: Program\n\n", sut.ParseErrorMessage);
}
public void status_is_parse_failed_if_the_document_could_not_be_parsed()
{
var document = @"# First Program
## First Exercise
whatever!";
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.ParseFailed, sut.Status);
}
public void programs_is_populated_from_cloud_if_cache_is_populated_and_cloud_is_populated()
{
var cacheDocument = "# First Program";
var cloudDocument = @"
# First Program
# Second Program";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(cloudDocument)
.WithCachedDocument(cacheDocument)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(2, sut.Programs.Count);
}
public void parse_error_message_returns_appropriate_message_if_the_document_could_not_be_parsed()
{
var document = @"# First Program
## First Exercise
whatever!";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.ParseErrorMessage);
Assert.Equal("Parsing failure: unexpected '#'; expected end of input (Line 3, Column 1); recently consumed: rogram\r\n\r\n", sut.ParseErrorMessage);
}
public void selected_program_instigates_routing_when_set_to_non_null_value()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
var navigationStack = sut
.HostScreen
.Router
.NavigationStack;
Assert.Empty(navigationStack);
var routeTo = new ExerciseProgramViewModelBuilder()
.Build();
sut.SelectedProgram = routeTo;
Assert.Equal(1, navigationStack.Count);
Assert.Same(routeTo, navigationStack[0]);
}
public void programs_is_populated_from_cloud_if_cache_errors_and_cloud_is_populated()
{
var document = "# First Program";
var stateService = new StateServiceMock();
stateService
.When(x => x.Get <string>(It.IsAny <string>()))
.Return(Observable.Throw <string>(new InvalidOperationException()));
stateService
.When(x => x.Set <string>(It.IsAny <string>(), It.IsAny <string>()))
.Return(Observables.Unit);
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithStateService(stateService)
.Build();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
}
public void selected_program_resets_to_null_when_returning_to_exercise_programs_view_model()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
sut.SelectedProgram = new ExerciseProgramViewModelBuilder()
.Build();
sut
.HostScreen
.Router
.NavigationStack
.Add(sut);
sut
.HostScreen
.Router
.NavigateBack
.ExecuteAsync();
Assert.Null(sut.SelectedProgram);
}
public void document_is_stored_in_cache_if_successfully_loaded_from_cloud()
{
var document = "# First Program";
var stateService = new StateServiceMock();
stateService
.When(x => x.Get <string>(It.IsAny <string>()))
.Return(Observable.Return <string>(null));
stateService
.When(x => x.Set <string>(It.IsAny <string>(), It.IsAny <string>()))
.Return(Observables.Unit);
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithStateService(stateService)
.Build();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromService, sut.Status);
stateService
.Verify(x => x.Set <string>("ExerciseProgramsDocument", document))
.WasCalledExactlyOnce();
}
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 void programs_is_populated_from_cloud_if_cache_errors_and_cloud_is_populated()
{
var document = "# First Program";
var stateService = new StateServiceMock();
var scheduler = new TestScheduler();
stateService
.When(x => x.Get<string>(It.IsAny<string>()))
.Return(Observable.Throw<string>(new InvalidOperationException()));
stateService
.When(x => x.Set<string>(It.IsAny<string>(), It.IsAny<string>()))
.Return(Observable.Return(Unit.Default));
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithScheduler(scheduler)
.WithStateService(stateService)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
}
public void programs_is_populated_from_cloud_if_cache_is_empty_and_cloud_is_populated()
{
var document = "# First Program";
var scheduler = new TestSchedulerService();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithSchedulerService(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
}
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 programs_is_populated_from_cloud_if_cache_is_populated_and_cloud_is_populated()
{
var cacheDocument = "# First Program";
var cloudDocument = @"
# First Program
# Second Program";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(cloudDocument)
.WithCachedDocument(cacheDocument)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(2, sut.Programs.Count);
}
public void status_is_loaded_from_cloud_if_document_is_successfully_loaded_from_cloud()
{
var document = "# First Program";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromService, sut.Status);
}
public void status_is_parse_failed_if_the_document_could_not_be_parsed()
{
var document = @"# First Program
## First Exercise
whatever!";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.ParseFailed, sut.Status);
}
public void document_is_not_stored_in_cache_if_loaded_from_cache()
{
var document = "# First Program";
var scheduler = new TestScheduler();
var stateService = new StateServiceMock();
stateService
.When(x => x.Get<string>(It.IsAny<string>()))
.Return(Observable.Return(document));
stateService
.When(x => x.Set<string>(It.IsAny<string>(), It.IsAny<string>()))
.Return(Observable.Return(Unit.Default));
var sut = new ExerciseProgramsViewModelBuilder()
.WithScheduler(scheduler)
.WithStateService(stateService)
.Build();
scheduler.AdvanceMinimal();
Assert.Equal(ExerciseProgramsViewModelStatus.LoadedFromCache, sut.Status);
stateService
.Verify(x => x.Set<string>("ExerciseProgramsDocument", document))
.WasNotCalled();
}
public void programs_is_null_if_both_cache_and_cloud_are_empty()
{
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.Null(sut.Programs);
}
public void programs_yields_any_successfully_parsed_programs()
{
var document = "# First Program";
var scheduler = new TestScheduler();
var sut = new ExerciseProgramsViewModelBuilder()
.WithCloudDocument(document)
.WithScheduler(scheduler)
.Build();
scheduler.AdvanceMinimal();
Assert.NotNull(sut.Programs);
Assert.Equal(1, sut.Programs.Count);
Assert.Equal("First Program", sut.Programs.ElementAt(0).Name);
}
public void selected_program_does_not_instigate_routing_when_set_to_null_value()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
var navigationStack = sut
.HostScreen
.Router
.NavigationStack;
Assert.Empty(navigationStack);
var routeTo = new ExerciseProgramViewModelBuilder()
.Build();
sut.SelectedProgram = routeTo;
Assert.Equal(1, navigationStack.Count);
sut.SelectedProgram = null;
Assert.Equal(1, navigationStack.Count);
}
public void selected_program_resets_to_null_when_returning_to_exercise_programs_view_model()
{
var sut = new ExerciseProgramsViewModelBuilder()
.Build();
sut.SelectedProgram = new ExerciseProgramViewModelBuilder()
.Build();
sut
.HostScreen
.Router
.NavigationStack
.Add(sut);
sut
.HostScreen
.Router
.NavigateBack
.ExecuteAsync();
Assert.Null(sut.SelectedProgram);
}
