public static void ExpectEvent <T>(EventTriggerCallback eventTrigger,
object sender, string eventName, EventValidationCallback <T> eventValidation) where T : EventArgs
{
EventInfo eventInfo = sender.GetType().GetEvent(eventName);
if (eventInfo == null)
{
throw new TestValidationException("Could not find " + eventName + " event in object " + sender.GetType().Name);
}
EventHelper.eventName = eventName;
Type eventDelegate = eventInfo.EventHandlerType;
MethodInfo callbackMethodInfo = typeof(EventHelper).GetMethod("CallbackEventHandler",
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
Delegate eventHandler = Delegate.CreateDelegate(eventDelegate, callbackMethodInfo);
RoutedEvent[] routedEvents = EventManager.GetRoutedEvents();
RoutedEvent candidateRoutedEvent = null;
foreach (RoutedEvent routedEvent in routedEvents)
{
if (routedEvent.Name.Equals(eventName) && (sender.GetType().IsSubclassOf(routedEvent.OwnerType) || sender.GetType() == routedEvent.OwnerType))
{
candidateRoutedEvent = routedEvent;
}
}
if (sender is UIElement && candidateRoutedEvent != null)
{
((UIElement)sender).AddHandler(candidateRoutedEvent, eventHandler);
eventTrigger();
((UIElement)sender).RemoveHandler(candidateRoutedEvent, eventHandler);
}
else
{
MethodInfo addHandler = eventInfo.GetAddMethod();
MethodInfo removeHandler = eventInfo.GetRemoveMethod();
Object[] handlerArgs = { eventHandler };
addHandler.Invoke(sender, handlerArgs);
eventTrigger();
removeHandler.Invoke(sender, handlerArgs);
}
eventValidation(sender, (T)EventHelper.actualEventArgs);
isEventFired = false;
}
public static void ExpectEvent <T>(EventTriggerCallback eventTrigger,
object sender, string eventName, T expectedEventArgs, bool eventShouldFire) where T : EventArgs
{
ExpectEvent(eventTrigger, sender, eventName, delegate(object actualSender, T actualEventArgs)
{
if (eventShouldFire)
{
if (!isEventFired)
{
throw new TestValidationException("The " + eventName + " event did not fire.");
}
if (actualEventArgs != null)
{
if (expectedEventArgs != null)
{
if (!EventHelper.sender.Equals(actualSender))
{
throw new TestValidationException("The actual sender " + actualSender.ToString() + " reference is not equal to the expected sender.");
}
if (expectedEventArgs.GetType() != actualEventArgs.GetType())
{
throw new TestValidationException("Type of actual EventArgs and expected EventArgs is not the same.");
}
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(actualEventArgs.GetType());
foreach (PropertyDescriptor property in properties)
{
if (property.GetValue(actualEventArgs) is IEnumerable)
{
// Loop through both IEnumerables and compare value by value...
IEnumerator actualEventArgsPropertyValues = ((IEnumerable)property.GetValue(actualEventArgs)).GetEnumerator();
IEnumerator expectedEventArgsPropertyValues = ((IEnumerable)property.GetValue(expectedEventArgs)).GetEnumerator();
bool firstEnumeratorMoveNext, secondEnumeratorMoveNext;
while ((firstEnumeratorMoveNext = actualEventArgsPropertyValues.MoveNext()) & (secondEnumeratorMoveNext = expectedEventArgsPropertyValues.MoveNext()))
{
if (!actualEventArgsPropertyValues.Current.Equals(expectedEventArgsPropertyValues.Current))
{
throw new TestValidationException("Actual EventArgs IEumerable property value " + actualEventArgsPropertyValues.Current.ToString() + " is not the same as expected EventArgs IEumerable property value " + expectedEventArgsPropertyValues.Current.ToString() + ".");
}
}
if (firstEnumeratorMoveNext != secondEnumeratorMoveNext)
{
throw new TestValidationException("Actual EventArgs IEnumerable property " + property.Name + " has different number of items than expected EventArgs.");
}
}
else if (!property.GetValue(actualEventArgs).Equals(property.GetValue(expectedEventArgs)))
{
throw new TestValidationException("Property Name: " + property.Name + ", Expected Value: " + property.GetValue(expectedEventArgs) + ", Actual Value: " + property.GetValue(actualEventArgs));
}
}
}
else
{
throw new TestValidationException("The expected EventArgs can not be null because the actual EventArgs is not null.");
}
}
else
{
if (expectedEventArgs != null)
{
throw new TestValidationException("The expected EventArgs should be null because the the actual EventArgs is null.");
}
}
}
else
{
if (isEventFired)
{
throw new TestValidationException("The " + eventName + " event fired.");
}
}
}
);
}
public static void ExpectEvent <T>(EventTriggerCallback eventTrigger,
object sender, string eventName, T expectedEventArgs) where T : EventArgs
{
ExpectEvent <T>(eventTrigger, sender, eventName, expectedEventArgs, true);
}