def testHmacMethod(self): data = Message(Pyro4.message.MSG_RESULT, b"test", 42, 0, 1, hmac_key=b"test key") digest = data.hmac() self.assertTrue(len(digest) > 10) data = Message(Pyro4.message.MSG_RESULT, b"test", 42, 0, 1) with self.assertRaises(TypeError): data.hmac()