Mocking a URL in Java

Question

We have a URL object in one of our Java classes that we want to mock, but it\'s a final class so we cannot. We do not want to go a level above, and mock the InputStream beca

Answer 1

I would look again at why you want to mock a final data object. Since by definition you aren't subclassing the object in your actual code, and it's not going to be the object under test, you shouldn't need to white-box test this code; just pass in whatever (real) URL objects are appropriate, and check the output.

Mock objects are useful when it's difficult to create a real object appropriate, or the real object's method are either time-consuming or depend on some stateful external resource (like a database). Neither of these apply in this case so I can't see why you can't just construct a real URL object representing the appropriate resource location.