'L{SynchronousTestCase.successResultOf} raises a
L{SynchronousTestCase.failureException} that has the original failure
traceback when called with a L{Deferred} with a failure result.'

def test_successResultOfWithFailureHasTraceback(self):

    try:
        self.successResultOf(fail(self.failure))
    except self.failureException as e:
        self.assertIn(self.failure.getTraceback(), str(e))
