test_logs.py 文件源码

def test_old_handler_filter():
        """Should not log harmless werkzeug "session is disconnected" msg.

        The filter should be added to all root handlers, even the ones that
        already existed before importing the "logs" module.

        Message based on the log output that ends with traceback plaintext as
        seen in lib/python3.6/site-packages/werkzeug/serving.py:225 of
        Werkzeug==0.12.1:

            - logger name: werkzeug
            - level: ERROR
            - only argument: ends with "KeyError: 'Session is disconnected'"
        """
        old_handler = Mock()
        old_handler.filters = []

        logging.root.addHandler(old_handler)
        old_handler.addFilter.assert_not_called()
        # Importing the module should add the filter to existent root handlers.
        imp.reload(logs)
        old_handler.addFilter.assert_called_once_with(
            logs.LogManager.filter_session_disconnected)

        logging.root.removeHandler(old_handler)