Mockito How to mock and assert a thrown exception?
To answer your second question first. If you're using JUnit 4, you can annotate your test with
@Test(expected=MyException.class)to assert that an exception has occured. And to "mock" an exception with mockito, use
when(myMock.doSomething()).thenThrow(new MyException());
BDD Style Solution (Updated to Java 8)
Mockito alone is not the best solution for handling exceptions, use Mockito with Catch-Exception
Mockito + Catch-Exception + AssertJ
given(otherServiceMock.bar()).willThrow(new MyException());when(() -> myService.foo());then(caughtException()).isInstanceOf(MyException.class);Sample code
Dependencies
If you want to test the exception message as well you can use JUnit's ExpectedException with Mockito:
@Rulepublic ExpectedException expectedException = ExpectedException.none();@Testpublic void testExceptionMessage() throws Exception { expectedException.expect(AnyException.class); expectedException.expectMessage("The expected message"); given(foo.bar()).willThrow(new AnyException("The expected message"));}