test_fileio.py 文件源码

def testOpenDirFD(self):
        fd = os.open('.', os.O_RDONLY)
        with self.assertRaises(IOError) as cm:
            _FileIO(fd, 'r')
        os.close(fd)
        self.assertEqual(cm.exception.errno, errno.EISDIR)

    #A set of functions testing that we get expected behaviour if someone has
    #manually closed the internal file descriptor.  First, a decorator: