public void FilteredHandlerLifeCycleTest()
{
var handler1Called = false;
var handler2Called = false;
var handler3Called = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
//------------------
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler1Called = true; });
listener.RegisterHandler(NotifyCollectionChangedAction.Remove, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler2Called = true; });
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler3Called = true; });
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(true);
handler2Called.Is(true);
handler3Called.Is(true);
//------------------
handler1Called = false;
handler2Called = false;
handler3Called = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
}
public void WeakEventTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new CollectionChangedWeakEventListener(eventPublisher,
(sender, e) => listener1Success = true);
var listenerWeakReference = new WeakReference(listener1);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1 = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventPublisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listener1Success.Is(false);
}
public void SourceReferenceMemoryLeakTest()
{
var handler1Success = false;
var publisherStrongReference = new TestEventPublisher();
var publisherWeakReference = new WeakReference <TestEventPublisher>(publisherStrongReference);
var listener = new CollectionChangedWeakEventListener(publisherStrongReference);
listener.RegisterHandler((sender, e) => handler1Success = true);
publisherStrongReference.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
listener.Dispose();
publisherStrongReference = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
TestEventPublisher resultPublisher = null;
publisherWeakReference.TryGetTarget(out resultPublisher).Is(false);
resultPublisher.IsNull();
}
public void BasicConstructorLifeCycleTest()
{
var listenerSuccess = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher, (sender, e) => listenerSuccess = true);
//------------------
listenerSuccess.Is(false);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listenerSuccess.Is(true);
//------------------
listenerSuccess = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listenerSuccess.Is(false);
try
{
listener.RegisterHandler((sender, e) => listenerSuccess = true);
}
catch (Exception e)
{
e.GetType().Is(typeof(ObjectDisposedException));
}
}
public void BasicConstructorLifeCycleTest()
{
var listenerSuccess = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher, (sender, e) => listenerSuccess = true);
//------------------
listenerSuccess.Is(false);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listenerSuccess.Is(true);
//------------------
listenerSuccess = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listenerSuccess.Is(false);
try
{
listener.RegisterHandler((sender, e) => listenerSuccess = true);
}
catch (Exception e)
{
e.GetType().Is(typeof(ObjectDisposedException));
}
}
public HandlerMemoryLeakTestClass(INotifyCollectionChanged publisher)
{
Listener = new CollectionChangedWeakEventListener(publisher);
// This handler refers "this".
NotifyCollectionChangedEventHandler handler = (sender, e) => { ToString(); };
Listener.RegisterHandler(handler);
Listener.RegisterHandler(NotifyCollectionChangedAction.Reset, handler);
}
public void MultipleHandlerLifeCycleTest()
{
var handler1Success = false;
var handler2Success = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
//------------------
handler1Success.Is(false);
handler2Success.Is(false);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(false);
handler2Success.Is(false);
//------------------
listener.RegisterHandler((sender, e) => handler1Success = true);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
handler2Success.Is(false);
//------------------
handler1Success = false;
handler2Success = false;
listener.RegisterHandler((sender, e) => handler2Success = true);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
handler2Success.Is(true);
//------------------
handler1Success = false;
handler2Success = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(false);
handler2Success.Is(false);
}
public void MultipleHandlerLifeCycleTest()
{
var handler1Success = false;
var handler2Success = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
//------------------
handler1Success.Is(false);
handler2Success.Is(false);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(false);
handler2Success.Is(false);
//------------------
listener.RegisterHandler((sender, e) => handler1Success = true);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
handler2Success.Is(false);
//------------------
handler1Success = false;
handler2Success = false;
listener.RegisterHandler((sender, e) => handler2Success = true);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
handler2Success.Is(true);
//------------------
handler1Success = false;
handler2Success = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(false);
handler2Success.Is(false);
}
public void MultiThreadHandlerTest()
{
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
var handlerCalledCount = 0;
var parentTask = new Task(() =>
{
var tf = new TaskFactory(TaskCreationOptions.AttachedToParent, TaskContinuationOptions.AttachedToParent);
for (int i = 0; i < 50; i++)
{
tf.StartNew(() =>
{
for (int f = 0; f < 500; f++)
{
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handlerCalledCount++; });
}
});
}
});
parentTask.Start();
parentTask.Wait();
handlerCalledCount.Is(0);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handlerCalledCount.Is(25000);
handlerCalledCount = 0;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handlerCalledCount.Is(0);
}
public void MultiThreadHandlerTest()
{
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
var handlerCalledCount = 0;
var parentTask = new Task(() =>
{
var tf = new TaskFactory(TaskCreationOptions.AttachedToParent, TaskContinuationOptions.AttachedToParent);
for (int i = 0; i < 50; i++)
{
tf.StartNew(() =>
{
for (int f = 0; f < 500; f++)
{
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handlerCalledCount++; });
}
});
}
});
parentTask.Start();
parentTask.Wait();
handlerCalledCount.Is(0);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handlerCalledCount.Is(25000);
handlerCalledCount = 0;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handlerCalledCount.Is(0);
}
public void AddHandlerKindTest()
{
var handler1Called = false;
var handler2Called = false;
var handler3Called = false;
var handler4Called = false;
var handler5Called = false;
var publisher = new TestEventPublisher();
var listener1 = new CollectionChangedWeakEventListener(publisher)
{
{NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler1Called = true; }},
{NotifyCollectionChangedAction.Remove,
(sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler2Called = true;},
(sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler3Called = true;}
},
(sender,e) => handler4Called = true,
{NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler5Called = true; }}
};
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Reset, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(true);
handler5Called.Is(false);
handler4Called = false;
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Called.Is(true);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(true);
handler5Called.Is(true);
handler1Called = false;
handler4Called = false;
handler5Called = false;
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(true);
handler3Called.Is(true);
handler4Called.Is(true);
handler5Called.Is(false);
handler1Called = false;
handler2Called = false;
handler3Called = false;
handler4Called = false;
handler5Called = false;
listener1.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(false);
handler5Called.Is(false);
}
public void FilteredHandlerLifeCycleTest()
{
var handler1Called = false;
var handler2Called = false;
var handler3Called = false;
var publisher = new TestEventPublisher();
var listener = new CollectionChangedWeakEventListener(publisher);
//------------------
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler1Called = true; });
listener.RegisterHandler(NotifyCollectionChangedAction.Remove, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler2Called = true; });
listener.RegisterHandler(NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler3Called = true; });
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(true);
handler2Called.Is(true);
handler3Called.Is(true);
//------------------
handler1Called = false;
handler2Called = false;
handler3Called = false;
listener.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
}
public void AddHandlerKindTest()
{
var handler1Called = false;
var handler2Called = false;
var handler3Called = false;
var handler4Called = false;
var handler5Called = false;
var publisher = new TestEventPublisher();
var listener1 = new CollectionChangedWeakEventListener(publisher)
{
{ NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler1Called = true; } },
{ NotifyCollectionChangedAction.Remove,
(sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler2Called = true; },
(sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Remove); handler3Called = true; } },
(sender, e) => handler4Called = true,
{ NotifyCollectionChangedAction.Add, (sender, e) => { e.Action.Is(NotifyCollectionChangedAction.Add); handler5Called = true; } }
};
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Reset, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(true);
handler5Called.Is(false);
handler4Called = false;
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Called.Is(true);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(true);
handler5Called.Is(true);
handler1Called = false;
handler4Called = false;
handler5Called = false;
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(true);
handler3Called.Is(true);
handler4Called.Is(true);
handler5Called.Is(false);
handler1Called = false;
handler2Called = false;
handler3Called = false;
handler4Called = false;
handler5Called = false;
listener1.Dispose();
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
publisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Remove, null);
handler1Called.Is(false);
handler2Called.Is(false);
handler3Called.Is(false);
handler4Called.Is(false);
handler5Called.Is(false);
}
public HandlerMemoryLeakTestClass(INotifyCollectionChanged publisher)
{
Listener = new CollectionChangedWeakEventListener(publisher);
// This handler refers "this".
NotifyCollectionChangedEventHandler handler = (sender, e) => { ToString(); };
Listener.RegisterHandler(handler);
Listener.RegisterHandler(NotifyCollectionChangedAction.Reset, handler);
}
public void SourceReferenceMemoryLeakTest()
{
var handler1Success = false;
var publisherStrongReference = new TestEventPublisher();
var publisherWeakReference = new WeakReference<TestEventPublisher>(publisherStrongReference);
var listener = new CollectionChangedWeakEventListener(publisherStrongReference);
listener.RegisterHandler((sender, e) => handler1Success = true);
publisherStrongReference.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
handler1Success.Is(true);
listener.Dispose();
publisherStrongReference = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
TestEventPublisher resultPublisher = null;
publisherWeakReference.TryGetTarget(out resultPublisher).Is(false);
resultPublisher.IsNull();
}
public void WeakEventTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new CollectionChangedWeakEventListener(eventPublisher,
(sender, e) => listener1Success = true);
var listenerWeakReference = new WeakReference(listener1);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1 = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventPublisher.RaiseCollectionChanged(NotifyCollectionChangedAction.Add, null);
listener1Success.Is(false);
}
public static CollectionChangedWeakEventListener CreateSynchronizableCollectionChangedEventListener
<TSource, TResult>(
ISynchronizableNotifyChangedCollection <TSource> source,
ISynchronizableNotifyChangedCollection <TResult> target,
Func <TSource, TResult> converter,
Action <NotifyCollectionChangedEventArgs> addAction = null,
Action <NotifyCollectionChangedEventArgs> moveAction = null,
Action <NotifyCollectionChangedEventArgs> removeAction = null,
Action <NotifyCollectionChangedEventArgs> replaceAction = null,
Action <NotifyCollectionChangedEventArgs> resetAction = null)
{
var isDisposableType = typeof(IDisposable).GetTypeInfo().IsAssignableFrom(typeof(TResult).GetTypeInfo());
var collectionChangedListener = new CollectionChangedWeakEventListener(source);
collectionChangedListener.RegisterHandler((sender, e) =>
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
if (addAction != null)
{
addAction(e);
break;
}
var vm = converter((TSource)e.NewItems[0]);
target.Insert(e.NewStartingIndex, vm);
break;
case NotifyCollectionChangedAction.Move:
if (moveAction != null)
{
moveAction(e);
break;
}
target.Move(e.OldStartingIndex, e.NewStartingIndex);
break;
case NotifyCollectionChangedAction.Remove:
if (removeAction != null)
{
removeAction(e);
break;
}
if (isDisposableType)
{
((IDisposable)target[e.OldStartingIndex]).Dispose();
}
target.RemoveAt(e.OldStartingIndex);
break;
case NotifyCollectionChangedAction.Replace:
if (replaceAction != null)
{
replaceAction(e);
break;
}
if (isDisposableType)
{
((IDisposable)target[e.NewStartingIndex]).Dispose();
}
var replaceVm = converter((TSource)e.NewItems[0]);
target[e.NewStartingIndex] = replaceVm;
break;
case NotifyCollectionChangedAction.Reset:
if (resetAction != null)
{
resetAction(e);
break;
}
if (isDisposableType)
{
foreach (var result in target)
{
var item = (IDisposable)result;
item.Dispose();
}
}
target.Clear();
break;
default:
throw new ArgumentException();
}
});
return(collectionChangedListener);
}
