[server] drop system_source_cnx for a simpler internal API system_source_cnx() can be replaced with source_cnx(). If system_source_cnx() is called with dbms_system_base=False, it is strictly equivalent to calling source_cnx() with the same source, privileges and interactivity. If system_source_cnx() is called with dbms_system_base=True, it is equivalent to calling source_cnx() with the system database and the same source, privileges and interactivity. No use of the default value for 'special_privs' was found in the code.

from unittest import TestCase

from cubicweb import crypto


class CryptoTC(TestCase):

    def test_encrypt_decrypt_roundtrip(self):
        data = {'a': u'ah', 'b': [1, 2]}
        seed = 's' * 16
        crypted = crypto.encrypt(data, seed)
        decrypted = crypto.decrypt(crypted, seed)
        self.assertEqual(decrypted, data)


if __name__ == '__main__':
    import unittest
    unittest.main()