def test_typeBuiltin(self):
        """
        Test that a builtin type can be jellied and unjellied to the original
        type.
        """
        t = [str]
        r = jelly.unjelly(jelly.jelly(t))
        self.assertEqual(t, r)

        Test that a builtin type can be jellied and unjellied to the original
        type.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/spread/test/test_jelly.py