xUnit中的Legacy代码中的ExpectedException

Question

As widely stated in other posts, ExpectedException does not exist in xUnit. However, is there something that exists to assist in porting legacy tests to xUnit as essentially a polyfill?

I believe that with an accelerated adoption of .Net Core as we will likely see with .Net Standard 2, we will see more and more tests getting ported from other frameworks to those supported most easily out of the box in .Net Core tooling. While ExpectedException is probably not best practice going forward, having a legacy stopgap (even as eg a separate NuGet package) would greatly ease porting tests as this is one of the few transformations that is on a per-test basis and cannot be done by a simple search-replace. And when you're porting hundreds of unit tests, the "this can cause problems" doesn't seem like such a satisfying answer.

Answer 1

I may have misunderstood your question, but you can test for exceptions in xUnit by doing something like this:

[Fact]
public void ExceptionTest()
{
    // Arrange
    // Act
    Action act = () => throw new Exception();

    // Assert
    Assert.Throws<Exception>(act);
}

Allowing each ExpectedException test to be converted by adding in the xUnit Assert.Throws .