在xUnit.net忽略异常

本文介绍了在xUnit忽略异常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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/ 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:

xunit.codeplex/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.