unit-testing - Rhino 模拟，MbUnit : Best way to check if object has raised an event

Question

我有一个正在测试的对象会引发事件。使用 Rhino Mocks 检查它是否被提出的最佳方法是什么？

我能想到的最好的(我确信它会比这更好):

public void MyCallback(object sender, EventArgs e) { _flag = true;}

[Test]
public void DoSomethingRaisesEvent() {
  _flag = false;
  using(_mocks.Record()) {
    Expect.Call(delegeate { _obj.DoSomething();});
  }
  using(_mocks.Playback()) {
    _obj = new SomethingDoer();
    _obj.SomethingWasDoneEvent += new EventHandler(MyHandler);
    Assert.IsTrue(_flag);
  }
}

Answer 1

我找到了 this article by Phil Haack on how to test events using anonymous delegates

这是代码，直接从他的博客中撕下来，供懒得点击的人使用:

[Test]
public void SettingValueRaisesEvent()
{
    bool eventRaised = false;
    Parameter param = new Parameter("num", "int", "1");
    param.ValueChanged += 
        delegate(object sender, ValueChangedEventArgs e)
        {
            Assert.AreEqual("42", e.NewValue);
            Assert.AreEqual("1", e.OldValue);
            Assert.AreEqual("num", e.ParameterName);
            eventRaised = true;
        };
    param.Value = "42"; //should fire event.

    Assert.IsTrue(eventRaised, "Event was not raised");
}