NUnit的Assert.That（方法，Throws.Exception）没有捕获异常 [英] nUnit Assert.That(method,Throws.Exception) not catching exceptions

问题描述

为什么这个单元测试，检查异常失败，有人能告诉我吗？显然，我的真正的考验是检查等code，但我使用Int32.Parse显示的问题。

Can someone tell me why this unit test that checks for exceptions fails? Obviously my real test is checking other code but I'm using Int32.Parse to show the issue.

[Test]
public void MyTest()
{
    Assert.That(Int32.Parse("abc"), Throws.Exception.TypeOf<FormatException>());
}

测试失败，给这个错误。很明显，我想测试这种例外，我觉得我失去了一些东西在我的语法。

The test fails, giving this error. Obviously I'm trying to test for this exception and I think I'm missing something in my syntax.

Error   1   TestCase '.MyTest'
failed: System.FormatException : Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Int32.Parse(String s)

根据在文档抛出约束（NUnit的2.5）

推荐答案

试试这个来代替：

Assert.That(() => Int32.Parse("abc"), Throws.Exception.TypeOf<FormatException>());

基本上，你需要一个委托传递给 Assert.That ，就像在你的链路状态（文档请注意，我用一个lambda EX pression在这里，但它应是相同的）。

Basically you need to pass a delegate to Assert.That, just like the documentation in your link states (note that I've used a lambda expression here, but it should be the same).

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