ioloop_test.py 文件源码

def test_close_file_object(self):
        """When a file object is used instead of a numeric file descriptor,
        the object should be closed (by IOLoop.close(all_fds=True),
        not just the fd.
        """
        # Use a socket since they are supported by IOLoop on all platforms.
        # Unfortunately, sockets don't support the .closed attribute for
        # inspecting their close status, so we must use a wrapper.
        class SocketWrapper(object):
            def __init__(self, sockobj):
                self.sockobj = sockobj
                self.closed = False

            def fileno(self):
                return self.sockobj.fileno()

            def close(self):
                self.closed = True
                self.sockobj.close()
        sockobj, port = bind_unused_port()
        socket_wrapper = SocketWrapper(sockobj)
        io_loop = IOLoop()
        io_loop.add_handler(socket_wrapper, lambda fd, events: None,
                            IOLoop.READ)
        io_loop.close(all_fds=True)
        self.assertTrue(socket_wrapper.closed)