def test_pipe_iostream(self):
r, w = os.pipe()
rs = PipeIOStream(r, io_loop=self.io_loop)
ws = PipeIOStream(w, io_loop=self.io_loop)
ws.write(b"hel")
ws.write(b"lo world")
rs.read_until(b' ', callback=self.stop)
data = self.wait()
self.assertEqual(data, b"hello ")
rs.read_bytes(3, self.stop)
data = self.wait()
self.assertEqual(data, b"wor")
ws.close()
rs.read_until_close(self.stop)
data = self.wait()
self.assertEqual(data, b"ld")
rs.close()
