public void FirePropertyChangedEvent_Always_CallsCallback()
{
EventListenerStub listener = new EventListenerStub();
Person person = new Person();
WeakEventHandler weakEventHandler = WeakPropertyChangedEventHandler.Register(
person,
(s, eh) => s.PropertyChanged -= eh,
listener,
(me, sender, ea) => me.OnPropertyChanged(sender, ea));
person.Name = "Bob";
Assert.AreEqual(1, listener.EventHandlerCallCount);
Assert.AreEqual("Name", listener.LastPropertyChanged);
}
public void FirePropertyChangedEvent_Always_CallsCallback()
{
EventListenerStub listener = new EventListenerStub();
Person person = new Person();
WeakEventHandler weakEventHandler = WeakPropertyChangedEventHandler.Register(
person,
(s, eh) => s.PropertyChanged -= eh,
listener,
(me, sender, ea) => me.OnPropertyChanged(sender, ea));
person.Name = "Bob";
Assert.AreEqual(1, listener.EventHandlerCallCount);
Assert.AreEqual("Name", listener.LastPropertyChanged);
}
public void Register_ListenerSetToNullAndGarbageCollected_ListenerSetToNull()
{
EventListenerStub listener = new EventListenerStub();
WeakReference listenerRef = new WeakReference(listener);
Person person = new Person();
WeakEventHandler weakEventHandler = WeakPropertyChangedEventHandler.Register(
person,
(s, eh) => s.PropertyChanged -= eh,
listener,
(me, sender, ea) => me.OnPropertyChanged(sender, ea));
listener = null;
GC.Collect();
Assert.IsFalse(listenerRef.IsAlive);
}
public void Register_ListenerSetToNullAndGarbageCollected_ListenerSetToNull()
{
EventListenerStub listener = new EventListenerStub();
WeakReference listenerRef = new WeakReference(listener);
Person person = new Person();
WeakEventHandler weakEventHandler = WeakPropertyChangedEventHandler.Register(
person,
(s, eh) => s.PropertyChanged -= eh,
listener,
(me, sender, ea) => me.OnPropertyChanged(sender, ea));
listener = null;
GC.Collect();
Assert.IsFalse(listenerRef.IsAlive);
}