asynctest.py 文件源码

def _tearDown(self):
        ''' Destroy the event loop '''
        if asyncio.iscoroutinefunction(self.tearDown):
            self.loop.run_until_complete(self.tearDown())
        else:
            self.tearDown()

        if not isinstance(self.loop, asyncio.AbstractEventLoop):
            raise Exception('Invalid event loop: ', self.loop)
        if self.loop.is_running():
            self.loop.stop()
        self.loop.close()
        del self.loop
        asyncio.set_event_loop_policy(None)
        asyncio.set_event_loop(None)

        # By explicitly forcing a garbage collection here,
        # the event loop will report any remaining sockets
        # and coroutines left in the event loop which indicates
        # that further cleanup actions should be implemented
        # in the code under test.
        gc.collect()