ioloop_test.py 文件源码

def test_read_while_writeable(self):
        # Ensure that write events don't come in while we're waiting for
        # a read and haven't asked for writeability. (the reverse is
        # difficult to test for)
        client, server = socket.socketpair()
        try:
            def handler(fd, events):
                self.assertEqual(events, IOLoop.READ)
                self.stop()
            self.io_loop.add_handler(client.fileno(), handler, IOLoop.READ)
            self.io_loop.add_timeout(self.io_loop.time() + 0.01,
                                     functools.partial(server.send, b'asdf'))
            self.wait()
            self.io_loop.remove_handler(client.fileno())
        finally:
            client.close()
            server.close()