C#测试-在未引发异常的情况下，为什么ExpectedException标签方法通过? [英] C# testing -- why does ExpectedException tagged method pass when exception not thrown?

问题描述

过去，我已经测试过预期的例外情况，如下所示:

In the past I have tested for expected exceptions like this:

[TestMethod]
public void TestThrowsException() {
  try {
    Foo();
    Assert.Fail();
  } catch (MyException ex){//good
  }
}

但是，我注意到有一种(更干净的)方法可以使用ExpectedException属性对此进行测试.当未引发异常时，为什么此测试方法通过?当然，这违反了属性的目的.

However I notice that there is a (cleaner?) way to test this using the ExpectedException attribute. Why does this test method pass when the exception is not thrown? Surely this defeats the purpose of the attribute.

[TestMethod]
[ExpectedException(typeof(MyException))]
public void TestThrowsException() {
}

我正在使用Silverlight 2运行此测试

I am running this test using Silverlight 2

推荐答案

我从未见过这样的通行证-是您真正拥有的 吗?您是否绝对确定已将其标记为TestMethod?测试跑步者是否显示通过?您肯定有最新的代码吗?

I've never seen that pass - is that really all you've got? Are you absolutely sure you have marked it as a TestMethod? Does the test runner show it passing? Have you definitely got the most recent code?

我会仔细检查，但我确信那会失败...

I'll double check, but I'm sure that will fail...

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