def test_cipher(self):
cipher = AESCipher(None)
message = ''.join(
random.choice(string.ascii_uppercase + string.digits +
string.ascii_lowercase) for _ in range(100))
key = ''.join(
random.choice(string.ascii_uppercase + string.digits +
string.ascii_lowercase) for _ in range(32))
# check cipher without key
try:
C = cipher.encrypt(message)
self.assertFail()
except Exception as err:
self.assertEqual('Invalid key', str(err))
cipher.key = key
C = cipher.encrypt(message)
M = cipher.decrypt(C)
self.assertEqual(M, message)
