def test_startFieldsNotInFinish(self):
        logger = MemoryLogger()
        action = Action(logger, "unique", TaskLevel(level=[]), "sys:thename")
        action._start({"key": "value"})
        action.finish()
        self.assertNotIn("key", logger.messages[1])
L{Action.finish} logs a message without the fields from
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_action.py/ActionTests.test_startFieldsNotInFinish