def test_bytesio(self):
        for fmt in ALL_FORMATS:
            with self.subTest(fmt=fmt):
                b = BytesIO()
                pl = self._create(fmt=fmt)
                plistlib.dump(pl, b, fmt=fmt)
                pl2 = plistlib.load(BytesIO(b.getvalue()), fmt=fmt)
                self.assertEqual(dict(pl), dict(pl2))
                pl2 = plistlib.load(BytesIO(b.getvalue()))
                self.assertEqual(dict(pl), dict(pl2))