Is there some Assert method which can be used for unit test on whether a method throws an exception? [duplicate]

问题

This question already has answers here:

How do I use Assert to verify that an exception has been thrown? (22 answers)

Closed 2 years ago.

In C#, I have a method which throws an exception when a certain condition is true. I am supposed to write a unit test method to verify that.

Since the method being tested doesn't return a boolean value, I can't use Microsoft.VisualStudio.TestTools.UnitTesting.Assert.IsTrue method. Which assert method can I use? Thanks.

回答1:

Use Assert.Throws, like so:

var ex = Assert.Throws<ArgumentNullException>(() => My.Method(null));
Assert.Equals("foo", ex.ParamName);

This works in XUnit and in the later versions of MSTest (install MSTest as a NuGet package to get up-to-date versions)

来源：https://stackoverflow.com/questions/44316606/is-there-some-assert-method-which-can-be-used-for-unit-test-on-whether-a-method