Im in the process of writing a test for a small application that follows the MVP pattern.

Technically, I know I should have written the test before the code, but I needed to knock up a demo app quick smart and so im now going back to the test before moving on to the real development.

In short I am attempting to test the presenter, however I cannot even get an empty test to run due to an Internal.ExpectationException.

The exception is raised on a unexpected invocation of an event assignation.

Here is the presenter class,

   public LBCPresenter(IView view, IModel model)
   {
        m_model = model;

        m_model.BatteryModifiedEvent += new EventHandler(m_model_BatteryModifiedEvent);
   }

Model Interface

    public interface IModel
    {
         event EventHandler BatteryModifiedEvent;
    }

And here is the test class, I can't see what im missing, ive told NMock to expect the event...

    [TestFixture]
public class MVP_PresenterTester
{
    private Mockery mocks;
    private IView _mockView;
    private IViewObserver _Presenter;
    private IModel _mockModel;

    [SetUp]
    public void SetUp()
    {
        mocks = new Mockery();

        _mockView = mocks.NewMock<IView>();
        _mockModel = mocks.NewMock<IModel>();
        _Presenter = new LBCPresenter(_mockView, _mockModel);

    }

    [Test]
    public void TestClosingFormWhenNotDirty()
    {
         Expect.Once.On(_mockModel).EventAdd("BatteryModifiedEvent", NMock2.Is.Anything);

       //makes no difference if following line is commented out or not
       //mocks.VerifyAllExpectationsHaveBeenMet();
    }
}

Every time I run the test I get the same expectation Exception.

Any ideas?