test_timeout.py 文件源码

def testConnectTimeout(self):
        # Choose a private address that is unlikely to exist to prevent
        # failures due to the connect succeeding before the timeout.
        # Use a dotted IP address to avoid including the DNS lookup time
        # with the connect time.  This avoids failing the assertion that
        # the timeout occurred fast enough.
        addr = ('10.0.0.0', 12345)

        # Test connect() timeout
        _timeout = 0.001
        self.sock.settimeout(_timeout)

        _t1 = time.time()
        self.assertRaises(socket.error, self.sock.connect, addr)
        _t2 = time.time()

        _delta = abs(_t1 - _t2)
        self.assertTrue(_delta < _timeout + self.fuzz,
                     "timeout (%g) is more than %g seconds more than expected (%g)"
                     %(_delta, self.fuzz, _timeout))