public void Extensions_return_null_when_VM_is_disposed()
{
var vm = new MyViewModel(_serviceProvider);
vm.Titles.Should().NotBeNull();
vm.RefreshTitles.Should().NotBeNull();
vm.Dispose();
vm.Titles.Should().BeNull();
vm.RefreshTitles.Should().BeNull();
}
public void A_disposed_VM_returns_default_property_values()
{
var viewModel = new MyViewModel(_serviceProvider);
viewModel.Counter = 1;
viewModel.Dispose();
viewModel.Counter.Should().Be(default(int));
viewModel.Child.Should().Be(null);
viewModel.IncrementCounter.Should().Be(null);
}
public async Task It_Completes_Command_When_Disposed()
{
var viewModel = new MyViewModel(_serviceProvider);
var longRunningOperation = viewModel.LongRunningOperation.Execute();
viewModel.Dispose();
await longRunningOperation;
longRunningOperation.Status.Should().Be(TaskStatus.RanToCompletion);
}
public void A_disposed_VM_cannot_be_mutated()
{
var viewModel = new MyViewModel(_serviceProvider);
viewModel.Dispose();
// Direct interface members
Assert.Throws <ObjectDisposedException>(() => viewModel.AddDisposable(new TestDisposable()));
Assert.Throws <ObjectDisposedException>(() => viewModel.AddDisposable("key", new TestDisposable()));
Assert.Throws <ObjectDisposedException>(() => viewModel.RemoveDisposable(nameof(MyViewModel.Counter)));
Assert.Throws <ObjectDisposedException>(() => viewModel.SetErrors(nameof(MyViewModel.Counter), Enumerable.Empty <object>()));
Assert.Throws <ObjectDisposedException>(() => viewModel.SetErrors(errors: new Dictionary <string, IEnumerable <object> >()));
Assert.Throws <ObjectDisposedException>(() => viewModel.ClearErrors(nameof(MyViewModel.Counter)));
Assert.Throws <ObjectDisposedException>(() => viewModel.View = new TestViewModelView());
Assert.Throws <ObjectDisposedException>(() => viewModel.RaisePropertyChanged(nameof(MyViewModel.Counter)));
}
