Moq Event Aggregator Is it possible - moq

Question

Wondering if its possible to Moq the Prism EventAggregator
Let's take the EventAggregator Quickstart they have
[TestMethod]
public void PresenterPublishesFundAddedOnViewAddClick()
{
var view = new MockAddFundView();
var EventAggregator = new MockEventAggregator();
var mockFundAddedEvent = new MockFundAddedEvent();
EventAggregator.AddMapping<FundAddedEvent>(mockFundAddedEvent);
var presenter = new AddFundPresenter(EventAggregator);
presenter.View = view;
view.Customer = "99";
view.Fund = "TestFund";
view.PublishAddClick();
Assert.IsTrue(mockFundAddedEvent.PublishCalled);
Assert.AreEqual("99", mockFundAddedEvent.PublishArgumentPayload.CustomerId);
}
I have tried to convert the above using moq but I get problems
they have MockEventAggregator.How can I do that using Moq?
public class MockEventAggregator : IEventAggregator
{
Dictionary<Type, object> events = new Dictionary<Type, object>();
public TEventType GetEvent<TEventType>() where TEventType : EventBase
{
return (TEventType)events[typeof(TEventType)];
}
public void AddMapping<TEventType>(TEventType mockEvent)
{
events.Add(typeof(TEventType), mockEvent);
}
}
Has anybody used MOQ and the EventAggregator are there any examples out there?
Thanks a lot
EDIT
Following GrameF Answer I have added my code that still does not work.Can you help
[TestMethod]
public void PresenterPublishesFundAddedOnViewAddClick2()
{
//Arrange
var view = new Mock<IAddFundView>();
var fakeEventAggregator = new Mock<IEventAggregator>();
var fakeMyEvent = new Mock<FundAddedEvent>();
fakeEventAggregator.Setup(x => x.GetEvent<FundAddedEvent>()).Returns(fakeMyEvent.Object);
var presenter = new AddFundPresenter(fakeEventAggregator.Object) {View = view.Object};
fakeMyEvent.Verify(x => x.Publish(It.IsAny<FundOrder>())); **//CRASHES** HERE
//view.PublishAddClick();
//view.Customer = "99";
//view.Fund = "TestFund";
//view.PublishAddClick();
////Assert
//Assert.IsTrue(mockFundAddedEvent.PublishCalled);
//Assert.AreEqual("99", mockFundAddedEvent.PublishArgumentPayload.CustomerId);
//Assert.AreEqual("TestFund", mockFundAddedEvent.PublishArgumentPayload.TickerSymbol);
}

Answer 1

Yes, it's possible, you just need to set it up to return a mock event on which you can verify that Publish or Subscribe was called:
var fakeEventAggregator = new Mock<IEventAggregator>();
var fakeMyEvent = new Mock<MyEvent>();
fakeEventAggregator.
Setup(x => x.GetEvent<MyEvent>()).
Returns(fakeMyEvent.Object);
var test = new Foo(fakeEventAggregator.Object);
test.PublishAnEvent();
fakeMyEvent.Verify(x => x.Publish(It.IsAny<MyEventArgs>()));