//ref http://caliburn.codeplex.com/WorkItem/View.aspx?WorkItemId=6100
//see also http://caliburn.codeplex.com/Thread/View.aspx?ThreadId=212171
public void backreferences_should_not_leak_the_observer()
{
var handlerRef = new WeakReference(handler);
//this reference emulates a back pointer to a long-living model
var parent = notifier.Model;
ConfigureObserver(new[] {
"Model.SomeModelProperty"
});
//emulates the collection of the cluster composed by Screen, View, MessageHandler and ancillary filters
//(included Dependecies along with its internal PropertyPathMonitor)
observer = null;
handler = null;
GC.Collect();
GC.WaitForFullGCComplete();
GC.WaitForPendingFinalizers();
handlerRef.IsAlive.ShouldBeFalse();
//the first time a ppMonitor is notified AFTER the collection of its DependenyObserver,
//it unregisters the unnecessary handler
parent.NotifyOfPropertyChange("anyProperty");
parent.SubscriptionCount.ShouldBe(0);
}
protected override void given_the_context_of()
{
_expectationsWasSet = false;
var methodFactory = new DefaultMethodFactory();
_handler = StrictMock<IRoutedMessageHandler>();
_notifier = new TheNotifierClass();
_observer = new DependencyObserver(_handler, methodFactory, _notifier);
_trigger = Mock<IMessageTrigger>();
}
protected override void given_the_context_of()
{
expectationsWasSet = false;
var methodFactory = new DefaultMethodFactory();
handler = StrictMock <IRoutedMessageHandler>();
notifier = new TheNotifierClass();
observer = new DependencyObserver(handler, methodFactory, notifier);
trigger = Mock <IMessageTrigger>();
}
//see http://caliburn.codeplex.com/Thread/View.aspx?ThreadId=212171 for the rationale behind the finalizer removal
public void backreferences_should_not_leak_the_observer_strict()
{
var handlerRef = new WeakReference(handler);
var parent = notifier.Model;
ConfigureObserver(new[] {
"Model.SomeModelProperty"
});
observer = null;
handler = null;
GC.Collect();
GC.WaitForFullGCComplete();
GC.WaitForPendingFinalizers();
handlerRef.IsAlive.ShouldBeFalse();
parent.SubscriptionCount.ShouldBe(0);
}
//see http://caliburn.codeplex.com/Thread/View.aspx?ThreadId=212171 for the rationale behind the finalizer removal
public void backreferences_should_not_leak_the_observer_strict()
{
var handlerRef = new WeakReference(_handler);
var parent = _notifier.Model;
ConfigureObserver(new[] { "Model.SomeModelProperty" });
_observer = null;
_handler = null;
GC.Collect();
GC.WaitForFullGCComplete();
GC.WaitForPendingFinalizers();
Assert.That(handlerRef.IsAlive, Is.False);
Assert.That(parent.SubscriptionCount, Is.EqualTo(0));
}
//ref http://caliburn.codeplex.com/WorkItem/View.aspx?WorkItemId=6100
//see also http://caliburn.codeplex.com/Thread/View.aspx?ThreadId=212171
public void backreferences_should_not_leak_the_observer()
{
var handlerRef = new WeakReference(_handler);
//this reference emulates a back pointer to a long-living model
var parent = _notifier.Model;
ConfigureObserver(new[] { "Model.SomeModelProperty" });
//emulates the collection of the cluster composed by Screen, View, MessageHandler and ancillary filters
//(included Dependecies along with its internal PropertyPathMonitor)
_observer = null;
_handler = null;
GC.Collect();
GC.WaitForFullGCComplete();
GC.WaitForPendingFinalizers();
Assert.That(handlerRef.IsAlive, Is.False, "message handler has not been released");
//the first time a ppMonitor is notified AFTER the collection of its DependenyObserver,
//it unregisters the unnecessary handler
parent.NotifyOfPropertyChange("anyProperty");
Assert.That(parent.SubscriptionCount, Is.EqualTo(0), "subscription to parent model has not been removed");
}