'Ensure when routing_key_indexes are blank,
the routing key should be None'

def test_empty_routing_key_indexes(self):

    prepared = self.session.prepare('\n                                                INSERT    INTO    test3rf.test    (k,    v)    VALUES        (?,    ?)\n                                                ')
    prepared.routing_key_indexes = None
    self.assertIsInstance(prepared, PreparedStatement)
    bound = prepared.bind((1, None))
    self.assertEqual(bound.routing_key, None)
