How to Capture the Exception Message From Assert.Throws in NUnit23 Mar 2012
In the past I’ve used:
[ExpectedException(typeof(CustomException), ExpectedMessage="blah blah blah")]
to set an exception expectation and assert on the message. With the recent releases of NUnit I’ve finally transitioned all my code to use:
Assert.Throws<CustomException>(() => someType.someMethod(someValue));
if the method has no parameters.
Only lately have I needed to capture the exception message and validate it. To do this you do the following:
var ex = Assert.Throws<CustomException>(() => someType.someMethod(someValue)); Assert.That(ex.Message, Is.EqualTo("expected message here"));
I am blogging about this because I keep forgetting how to capture the exception message. Hope it helps someone else.