public void Test_EqualWhen_DoesNotChange()
{
// Arrange.
Property <int> property = Property.New(this, x => x.IntValue, OnPropertyChanged)
.EqualWhen((older, newer) => older > newer);
property.Value = -1;
// Act/Assert.
AssertThat.PropertyDoesNotChange(this,
x => x.IntValue,
() => property.Value = -2);
}
public void Test_Save_UnsubscribesFromCollectionChanges()
{
// Arrange.
recentFiles.SetupGet(rf => rf.Count)
.Returns(0);
// Act.
viewModel.Save();
// Assert.
AssertThat.PropertyDoesNotChange(viewModel,
p => p.CanClearRecentFiles,
() => recentFiles.As <INotifyCollectionChanged>()
.Raise(rf => rf.CollectionChanged += null,
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)));
}