The suggestion to use a MultiMock object was a good one. I didn't know
they existed!
I did some refactoring of the code being tested and rewrote of the
test. THis passes - apologies if there's a typo in it, it's not the
actual code.
1. Introduced an IControllerBase interface instead of having just an
abstract ControllerBase class
public interface ControllerBase
{
/// <summary>
/// Event raised when a task is being started.
/// </summary>
event EventHandler StartTask;
}
2. Rewrote the code in the class using the controller object to use it
as an IControllerBase instance rather than a ControllerBase instance
public class MyPresenter
{
//...
public void OnLoad()
{
controller.ChangingTabs += this.HandleChangingTabs;
((IControllerBase)controller).StartTask +=
this.HandleStartTask;
}
}
3. Rewrote the test:
[TestMethod()]
public void OnViewLoaded_Test()
{
// Arrange
MyPresenter testPresenter = new MyPresenter();
ControllerBase mockController =
mocks.DynamicMultiMock<IMyController>(typeof(IControllerBase));
// set up expectation that during the test, the class being
tested will add
// a handler to the Controller's events and that this event
handler will not be null
mockController.TaskSuspending += null;
LastCall.Constraints(Rhino.Mocks.Constraints.Is.NotNull());
mocks.ReplayAll();
// Act
testPresenter.OnViewLoaded();
// Assert
mocks.VerifyAll();
}
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