test_socket.py 文件源码

def test_connect(self):
        port = test_support.find_unused_port()
        cli = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.addCleanup(cli.close)
        with self.assertRaises(socket.error) as cm:
            cli.connect((HOST, port))
        self.assertEqual(cm.exception.errno, errno.ECONNREFUSED)