test_asyncore.py 文件源码

def test_resource_warning(self):
        # Issue #11453
        fd = os.open(support.TESTFN, os.O_RDONLY)
        f = asyncore.file_wrapper(fd)

        os.close(fd)
        with support.check_warnings(('', ResourceWarning)):
            f = None
            support.gc_collect()