public void saves_are_throttled_to_two_seconds()
{
var scheduler = new TestScheduler();
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
scheduler);
sut
.Activator
.Activate();
scheduler.AdvanceByMs(2000);
sut.Name = "Barney";
scheduler.AdvanceByMs(500);
sut.Name = "Barney the Dinosaur";
scheduler.AdvanceByMs(500);
sut.Weight = "42";
scheduler.AdvanceByMs(1999);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasNotCalled();
scheduler.AdvanceByMs(1);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasCalledExactlyOnce();
}
public void data_is_saved_immediately_upon_deactivation_even_if_two_seconds_has_not_elapsed_since_last_change()
{
var scheduler = new TestScheduler();
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
scheduler);
sut
.Activator
.Activate();
sut.Name = "Barney";
scheduler.AdvanceByMs(1);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasNotCalled();
sut
.Activator
.Deactivate();
scheduler.AdvanceByMs(1);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasCalledExactlyOnce();
}
public void data_is_saved_two_seconds_after_image_data_is_modified()
{
var scheduler = new TestScheduler();
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
scheduler);
sut
.Activator
.Activate();
scheduler.AdvanceByMs(2000);
sut.Weight = "42";
sut.ImageData = new byte[] { 1, 2, 3 };
scheduler.AdvanceByMs(1999);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasNotCalled();
scheduler.AdvanceByMs(1);
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasCalledExactlyOnce();
}
public void data_is_not_retrieved_upon_construction()
{
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
CurrentThreadScheduler.Instance);
api
.Verify(x => x.GetDinosaur(It.IsAny <int>()))
.WasNotCalled();
}
public void data_is_retrieved_upon_activation()
{
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
CurrentThreadScheduler.Instance);
sut
.Activator
.Activate();
api
.Verify(x => x.GetDinosaur(42))
.WasCalledExactlyOnce();
}
public void data_is_not_saved_if_it_is_invalid()
{
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
CurrentThreadScheduler.Instance);
sut
.Activator
.Activate();
sut.Weight = "42a";
api
.Verify(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.WasNotCalled();
}
public void data_is_deleted_if_user_confirms()
{
var api = new ApiMock();
var sut = new DinosaurDetailsViewModel(
42,
new BitmapLoaderMock(),
api,
CurrentThreadScheduler.Instance);
using (sut.ConfirmDeleteInteraction.RegisterHandler(context => context.SetOutput(true)))
{
sut
.DeleteCommand
.Execute()
.Subscribe();
}
api
.Verify(x => x.DeleteDinosaur(It.IsAny <int>()))
.WasCalledExactlyOnce();
}