test_dir_util.py 文件源码

def test_copy_tree_exception_in_listdir(self):
        """
        An exception in listdir should raise a DistutilsFileError
        """
        with patch("os.listdir", side_effect=OSError()), \
             self.assertRaises(errors.DistutilsFileError):
            src = self.tempdirs[-1]
            dir_util.copy_tree(src, None)