在xUnit.net忽略异常 [英] Ignoring Exceptions in xUnit.net

问题描述

我有一些情况下，我不在乎什么异常被抛出（只要有些异常被抛出）。不幸的是，

  Assert.Throws＆LT;异常＆GT;（someDelegate）;
 

不及格，除非异常的确切（所以不是派生类的实例）被抛出的一个实例。我知道我可以得到我想要的行为

 异常异常= Record.Exception（someDelegate）;
Assert.NotNull（例外）;
 

，但它不能读取正确的。我缺少的东西在的xUnit有我想要的行为？这里有两个测试，表明我的意思：

  [事实]
公共无效Throws_exception_and_passes（）{
    异常异常= Record.Exception（
        （）=＆GT; {抛出新的InvalidOperationException异常（）; }
    ）;
    Assert.NotNull（例外）;
}

[事实]
公共无效Throws_exception_and_fails（）{
    Assert.Throws＆LT;异常＆GT;（
        （）=＆GT; {抛出新的InvalidOperationException异常（）; }
    ）;
}
 

解决方案

每这里的文档：

HTTP：//xunit.$c$cplex.com/ Wiki页面标题= HowToUse和放大器; referringTitle =首页

您必须指定抛出你想要的异常类型。在一般情况下，这是很好的做法。你应该能够predict什么情景测试会抛出异常的类型。你应该能够设计出你们两个的方法和方式的测试，让你predict这一点。

有办法解决这个，像做了尝试发现自己，但你应该考虑改变你的设计了一下。

I have some cases where I don't care what exception is thrown (as long as some exception is thrown). Unfortunately,

Assert.Throws<Exception>(someDelegate);

doesn't pass unless exactly an instance of Exception (so not an instance of a derived class) is thrown. I know I can obtain the behavior I want with

Exception exception = Record.Exception(someDelegate);
Assert.NotNull(exception);

but it doesn't read right. Am I missing something in xUnit that has the behavior I want? Here are two tests that indicate what I mean:

[Fact]
public void Throws_exception_and_passes() {
    Exception exception = Record.Exception(
        () => { throw new InvalidOperationException(); }
    );
    Assert.NotNull(exception);
}

[Fact]
public void Throws_exception_and_fails() {
    Assert.Throws<Exception>(
        () => { throw new InvalidOperationException(); }
    );
}

解决方案

Per the documentation here:

http://xunit.codeplex.com/wikipage?title=HowToUse&referringTitle=Home

You have to specify the type of exception you want to be thrown. In general, this is good practice. You should be able to predict what scenarios a test would throw what type of exception. You should be able to design both you method and your test in a way that will allow you to predict this.

There are ways around this, like doing a try catch yourself, but you should look into changing your design a bit.

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