test_events.py 文件源码

def test_read_pty_output(self):
        proto = MyReadPipeProto(loop=self.loop)

        master, slave = os.openpty()
        master_read_obj = io.open(master, 'rb', 0)

        @asyncio.coroutine
        def connect():
            t, p = yield from self.loop.connect_read_pipe(lambda: proto,
                                                          master_read_obj)
            self.assertIs(p, proto)
            self.assertIs(t, proto.transport)
            self.assertEqual(['INITIAL', 'CONNECTED'], proto.state)
            self.assertEqual(0, proto.nbytes)

        self.loop.run_until_complete(connect())

        os.write(slave, b'1')
        test_utils.run_until(self.loop, lambda: proto.nbytes)
        self.assertEqual(1, proto.nbytes)

        os.write(slave, b'2345')
        test_utils.run_until(self.loop, lambda: proto.nbytes >= 5)
        self.assertEqual(['INITIAL', 'CONNECTED'], proto.state)
        self.assertEqual(5, proto.nbytes)

        os.close(slave)
        self.loop.run_until_complete(proto.done)
        self.assertEqual(
            ['INITIAL', 'CONNECTED', 'EOF', 'CLOSED'], proto.state)
        # extra info is available
        self.assertIsNotNone(proto.transport.get_extra_info('pipe'))