Mockito How to mock and assert a thrown exception?

Question

I\'m using mockito in a junit test. How do you make an exception happen and then assert that it has (generic pseudo-code)

Answer 1

Make the exception happen like this:

when(obj.someMethod()).thenThrow(new AnException());

Verify it has happened either by asserting that your test will throw such an exception:

@Test(expected = AnException.class)

Or by normal mock verification:

verify(obj).someMethod();

The latter option is required if your test is designed to prove intermediate code handles the exception (i.e. the exception won't be thrown from your test method).