'Make sure AES is homomorphic.'

def test_aes_homomorphic(self):

    payload = u'\u66f4\u7a33\u5b9a\u7684\u4ea4\u6613\u5e73\u53f0'
    password = u'secret'
    enc = pw_encode(payload, password)
    dec = pw_decode(enc, password)
    self.assertEqual(dec, payload)
