def test_true_2(self): self.assertTrue(is_rotation('hello', 'elloh'))
def test_false_2(self): self.assertFalse(is_rotation('hello', 'hellohello'))
def test_true(self): self.assertTrue(is_rotation('hello', 'ohell'))
def test_false(self): self.assertFalse(is_rotation('hello', 'lloeh'))