testing.py 文件源码

def tearDown(self):
        if (not IOLoop.initialized() or
            self.io_loop is not IOLoop.instance()):
            # Try to clean up any file descriptors left open in the ioloop.
            # This avoids leaks, especially when tests are run repeatedly
            # in the same process with autoreload (because curl does not
            # set FD_CLOEXEC on its file descriptors)
            self.io_loop.close(all_fds=True)
        super(AsyncTestCase, self).tearDown()