'The "initialization" class attributes like client_class and
creation_class should be set on the class and reflected in the
corresponding instance attributes of the instantiated backend.'

def test_initialization_class_attributes(self):

    conn = connections[DEFAULT_DB_ALIAS]
    conn_class = type(conn)
    attr_names = [('client_class', 'client'), ('creation_class', 'creation'), ('features_class', 'features'), ('introspection_class', 'introspection'), ('ops_class', 'ops'), ('validation_class', 'validation')]
    for (class_attr_name, instance_attr_name) in attr_names:
        class_attr_value = getattr(conn_class, class_attr_name)
        self.assertIsNotNone(class_attr_value)
        instance_attr_value = getattr(conn, instance_attr_name)
        self.assertIsInstance(instance_attr_value, class_attr_value)
