public void DispatcherDoesNothingForInexistentHandlers()
        {
            Mock<IHandlerFactory> factory = new Mock<IHandlerFactory>();
            factory.Setup(o => o.GetHandlersFor(It.IsAny<EventThatHappened>()))
                .Returns(null as IEnumerable<dynamic>);

            EventDispatcher dispatcher = new EventDispatcher(factory.Object);

            dispatcher.DispatchEvent(new EventThatHappened());
        }
        public void DispatcherDispatchesEventsToHandlers()
        {
            Mock<IHandleEvent<EventThatHappened>> handler1 = new Mock<IHandleEvent<EventThatHappened>>();
            handler1.Setup(o => o.Handle(It.IsAny<EventThatHappened>())).Verifiable();

            Mock<IHandleEvent<EventThatHappened>> handler2 = new Mock<IHandleEvent<EventThatHappened>>();
            handler2.Setup(o => o.Handle(It.IsAny<EventThatHappened>())).Verifiable();

            Mock<IHandlerFactory> factory = new Mock<IHandlerFactory>();
            factory.Setup(o => o.GetHandlersFor(It.IsAny<EventThatHappened>()))
                .Returns(new List<dynamic>()
                {
                    handler1.Object as dynamic, 
                    handler2.Object as dynamic
                });

            EventDispatcher dispatcher = new EventDispatcher(factory.Object);

            dispatcher.DispatchEvent(new EventThatHappened());

            handler1.Verify(mock => mock.Handle(It.IsAny<EventThatHappened>()), Times.Once);
            handler2.Verify(mock => mock.Handle(It.IsAny<EventThatHappened>()), Times.Once);
        }