test.py 文件源码

def test_WriteTimeout(self):
        """Test write() timeout."""
        # use xonxoff setting and the loop-back adapter to switch traffic on hold
        self.s.port = PORT
        self.s.write_timeout = 1.0
        self.s.xonxoff = True
        self.s.open()
        self.s.write(serial.XOFF)
        time.sleep(0.5)  # some systems need a little delay so that they can react on XOFF
        t1 = time.time()
        self.assertRaises(serial.SerialTimeoutException, self.s.write, b"timeout please" * 200)
        t2 = time.time()
        self.assertTrue(0.9 <= (t2 - t1) < 2.1, "Timeout not in the given interval ({})".format(t2 - t1))