test_proactor_events.py 文件源码

def test_pause_resume_writing(self):
        tr = self.pause_writing_transport(high=4)

        # write a large chunk, must pause writing
        fut = asyncio.Future(loop=self.loop)
        self.loop._proactor.send.return_value = fut
        tr.write(b'large data')
        self.loop._run_once()
        self.assertTrue(self.protocol.pause_writing.called)

        # flush the buffer
        fut.set_result(None)
        self.loop._run_once()
        self.assertEqual(tr.get_write_buffer_size(), 0)
        self.assertTrue(self.protocol.resume_writing.called)