Question

I’ve been looking for resources on how to extend JUnit4 with my own annotations.

I’d like to be able to define a @ExpectedProblem with which I could label some of my tests. I’ve seen there seems to be some material on the net on how to extend TestNG, but I could fine none to extend JUnit4.

Has anyone here extended JUnit4 in the past?

Thanks

Answer 1

Depending on what you want your @ExpectedProblem annotation to do, another option is to create a @Rule.

This requires JUnit 4.7+, but should be simpler than implementing your own Runner.

For instance, if you want an annotation to say, “this test should throw an exception” then you’ll want to take a look at the @ExpectedException rule. Even if that’s not enough for your needs it can provide a good starting point for implementing your own rule.