public void RegisteredHandlersAreInvoked()
{
ObservableThing thing = new ObservableThing();
PropertyObserver<ObservableThing> target = new PropertyObserver<ObservableThing>(thing);
bool wasInvoked = false;
target.RegisterHandler(t => t.SomeProperty, t => wasInvoked = (t == thing));
thing.SomeProperty = "whatever";
Assert.IsTrue(wasInvoked);
}
public void UnregisteredHandlersAreNotInvoked()
{
ObservableThing thing = new ObservableThing();
PropertyObserver <ObservableThing> target = new PropertyObserver <ObservableThing>(thing);
bool wasInvoked = false;
target.RegisterHandler(t => t.SomeProperty, t => wasInvoked = true);
target.UnregisterHandler(t => t.SomeProperty);
thing.SomeProperty = "whatever";
Assert.IsFalse(wasInvoked);
}
