private void CreateAndRegisterSubscriber(IEventAggregator eventAggregator)
{
var sub = new TestEventSubscriber <CustomerAddedEvent>();
eventAggregator.RegisterSubscriber(sub);
_weakReference = new WeakReference(sub);
}
public void ShouldSubscribeToEvent()
{
var eventAggregator = new EventAggregator();
var eventSubscriber = new TestEventSubscriber <CustomerAddedEvent>();
eventAggregator.RegisterSubscriber(eventSubscriber);
eventAggregator.Publish(new CustomerAddedEvent(5));
Assert.Single(eventSubscriber.ReceivedEvents);
Assert.Equal(5, eventSubscriber.ReceivedEvents[0].CustomerId);
}
public void ShouldReceiveEventThreeTimes()
{
var eventAggregator = new EventAggregator();
var eventSubscriber = new TestEventSubscriber <CustomerAddedEvent>();
eventAggregator.RegisterSubscriber(eventSubscriber);
eventAggregator.Publish(new CustomerAddedEvent(5));
eventAggregator.Publish(new CustomerAddedEvent(6));
eventAggregator.Publish(new CustomerAddedEvent(7));
Assert.Equal(3, eventSubscriber.ReceivedEvents.Count);
Assert.Equal(5, eventSubscriber.ReceivedEvents[0].CustomerId);
Assert.Equal(6, eventSubscriber.ReceivedEvents[1].CustomerId);
Assert.Equal(7, eventSubscriber.ReceivedEvents[2].CustomerId);
}
public void ShouldRemoveDeadSubscribersAfterUnregisterASubscriber(int expectedNumberOfSubscribers, bool garbageCollect)
{
var eventAggregator = new EventAggregator();
CreateAndRegisterSubscriber(eventAggregator);
var anotherSubscriber = new TestEventSubscriber <CustomerAddedEvent>();
eventAggregator.RegisterSubscriber(anotherSubscriber);
if (garbageCollect)
{
GC.Collect();
}
eventAggregator.UnregisterSubscriber(anotherSubscriber);
Assert.Equal(expectedNumberOfSubscribers, eventAggregator._subscribersByEvent[typeof(CustomerAddedEvent)].Count);
}
public void ShouldPushEventsToRightSubscribers()
{
var eventAggregator = new EventAggregator();
var customerAddedEventSubscriber = new TestEventSubscriber <CustomerAddedEvent>();
eventAggregator.RegisterSubscriber(customerAddedEventSubscriber);
var customerDeletedEventSubscriber = new TestEventSubscriber <CustomerDeletedEvent>();
eventAggregator.RegisterSubscriber(customerDeletedEventSubscriber);
eventAggregator.Publish(new CustomerAddedEvent(5));
eventAggregator.Publish(new CustomerDeletedEvent(7));
Assert.Single(customerAddedEventSubscriber.ReceivedEvents);
Assert.Equal(5, customerAddedEventSubscriber.ReceivedEvents[0].CustomerId);
Assert.Single(customerDeletedEventSubscriber.ReceivedEvents);
Assert.Equal(7, customerDeletedEventSubscriber.ReceivedEvents[0].CustomerId);
}