nUnit Assert.That(method,Throws.Exception) not catching exceptions

Question

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.

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Answer 1

What test runner are you using? Not all of them work correctly with the exception assertions.

You may have better luck using [ExpectedException (typeof(FormatException))] or even Assert.Throws<FormatException> (() => Int32.Parse("abc"));

Answer 2

Try this instead:

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

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).