def test_unparent_file(self):
try:
fo = FileObject("test_file", temporary=True)
do = DirectoryObject("test_dir", temporary=True)
fo.parent = do
fo.unparent()
if fo.parent == do or do.index(fo) is not None:
raise Exception("Parent hasn't been unset")
except Exception as exc:
traceback.print_exc()
self.fail(exc)
