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问题描述
我有一个类,当它的内部状态发生变化时会引发一个偶数(大致类似于INotifyPropertyChange但略有不同)。 我应该如何编写单元测试验证此事件确实已经提出? (事件中ExpectedException与模型相同?)
I have a class that raises an even when its internal state changes (broadly similar to INotifyPropertyChange but slightly different). How should I write a unit test that verifies that this event is indeed raised? (There's nothing in the same model as "ExpectedException" for events?)
推荐答案你好, 您可以在单元测试中使用代表来完成。 例如: Hello, You could do it using delegates in your unit tests. for example: [TestMethod] public void EventShouldBeRaised() { ClassToTest classToTest = new ClassToTest(); bool eventRaised = false; classToTest.EventRaised += delegate(object sender, ClassToTestEventArgs e) { eventRaised = true; }; classToTest.Property1 = "somthing"; // this property raises an event, test if the boolean is set to true in the delegate call. Assert.AreEqual(eventRaised, true); } [TestMethod] public void EventShouldNotBeRaised() { ClassToTest classToTest = new ClassToTest(); bool eventRaised = false; classToTest.EventRaised += delegate(object sender, ClassToTestEventArgs e) { eventRaised = true; }; classToTest.AnotherProperty = "somthing"; // This property does not raise the event, so we test that the eventRaised boolean is false. Assert.AreEqual(eventRaised, false); }
Valery。
Valery.
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如何为触发的事件编写单元测试?
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