So what did I learn, that by creating a class that inherits EventArgs i can pass any information I need in an event, I did write a quick presenter and its test to ensure that the ITask interface worked as I expected, i.e. in exactly the same way as any other EventHandler interface definition that I have done.
The presenter Tests
1: using Microsoft.VisualStudio.TestTools.UnitTesting;
2: using Rhino.Mocks;
3:
4: namespace ExamplePresenter.Tests
5: {
6: [TestClass]
7: public class PresenterTests
8: {
9: private static MockRepository _mockery;
10: private ITask _mockTask;
11: private IView _mockView;
12: public TestContext TestContext { get; set; }
13:
14: [TestInitialize]
15: public void TestInitialize()
16: {
17: _mockery = new MockRepository();
18:
19: _mockView = _mockery.StrictMock<IView>();
20: _mockTask = _mockery.StrictMock<ITask>();
21: }
22:
23: [TestMethod]
24: public void Should_Hook_Up_Events_On_Creation()
25: {
26: using (_mockery.Record())
27: {
28: _mockView.ButtonPressed += null;
29: LastCall.IgnoreArguments();
30:
31: _mockTask.ProgressMessage += null;
32: LastCall.IgnoreArguments();
33: }
34:
35: using (_mockery.Playback())
36: CreateSUT();
37: }
38:
39: private Presenter CreateSUT()
40: {
41: return new Presenter(_mockView, _mockTask);
42: }
43: }
44: }
and the presenter code, all fairly standard
1: using System;
2:
3: namespace ExamplePresenter
4: {
5: public class Presenter
6: {
7: private readonly ITask _task;
8: private readonly IView _view;
9:
10: public Presenter(IView view, ITask task)
11: {
12: _view = view;
13: _task = task;
14:
15: HookupEvents();
16: }
17:
18: private void HookupEvents()
19: {
20: _view.ButtonPressed += ButtonPressedEvent;
21: _task.ProgressMessage += ProgressMessageEvent;
22: }
23:
24: private void ButtonPressedEvent(object sender, EventArgs e)
25: {
26: throw new NotImplementedException();
27: }
28:
29: private void ProgressMessageEvent(object sender, MessageEventArgs args)
30: {
31: throw new NotImplementedException();
32: }
33: }
34: }
35:
36: using System;
37:
38: namespace ExamplePresenter
39: {
40: public interface IView
41: {
42: event EventHandler ButtonPressed;
43: }
44: }
So why have I put all this here, just so I remember 🙂
Have Fun.
The Butler Did It 