public void errors_saving_data_are_surfaced()
{
var api = new ApiMockBuilder()
.WithSaveDinosaur(new InvalidOperationException("foo"))
.Build();
var sut = new DinosaurDetailsViewModelBuilder()
.WithTestScheduler(out var scheduler)
.WithApi(api)
.Build();
sut.Name = "Barney";
scheduler.AdvanceByMs(2001);
Assert.NotNull(sut.Error);
Assert.Equal("foo", sut.Error.Exception.Message);
api
.When(x => x.SaveDinosaur(It.IsAny <Dinosaur>()))
.Return(Observable.Return(Unit.Default));
sut
.Error
.RetryCommand
.Execute(null);
scheduler.AdvanceByMs(1);
Assert.Null(sut.Error);
}
public void errors_deleting_data_are_surfaced()
{
var api = new ApiMockBuilder()
.WithDeleteDinosaur(new InvalidOperationException("foo"))
.Build();
var sut = new DinosaurDetailsViewModelBuilder()
.WithApi(api)
.WithConfirmDeleteInteraction(true)
.Build();
sut
.DeleteCommand
.Execute()
.Subscribe(
_ => { },
_ => { });
Assert.NotNull(sut.Error);
Assert.Equal("foo", sut.Error.Exception.Message);
api
.When(x => x.DeleteDinosaur(It.IsAny <int>()))
.Return(Observable.Return(Unit.Default));
sut
.Error
.RetryCommand
.Execute(null);
Assert.Null(sut.Error);
}
public void errors_retrieving_data_are_surfaced()
{
var api = new ApiMockBuilder()
.WithGetDinosaur(new InvalidOperationException("foo"))
.Build();
var sut = new DinosaurDetailsViewModelBuilder()
.WithApi(api)
.Build();
Assert.NotNull(sut.Error);
Assert.Equal("foo", sut.Error.Exception.Message);
api
.When(x => x.GetDinosaur(It.IsAny <int>()))
.Return(Observable.Return(default(Dinosaur)));
sut
.Error
.RetryCommand
.Execute(null);
Assert.Null(sut.Error);
}
public void memory_is_reclaimed_after_deactivation()
{
//
// IMPORTANT: if you're observing failures in this test, try running it in release mode without a debugger attached.
//
// The SUT will subscribe to this subject, so we hold a reference to it so that it can't be GC'd.
var isAuditingAvailable = new Subject <bool>();
var api = new ApiMockBuilder()
.WithIsAuditingAvailable(isAuditingAvailable)
.Build();
var sut = new DinosaurDetailsViewModelBuilder()
.WithApi(
new ApiMockBuilder()
.WithIsAuditingAvailable(isAuditingAvailable)
.Build())
.Build();
var weakSut = new WeakReference(sut);
sut = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.True(weakSut.IsAlive);
// Deactivation is when the SUT should detach subscriptions and therefore become eligible for collection.
((DinosaurDetailsViewModel)weakSut.Target)
.Activator
.Deactivate();
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.False(weakSut.IsAlive);
}