'A class defined with I{slots} can be jellied and unjellied with the
values for its attributes preserved.'

def test_newStyleWithSlots(self):

    n = E()
    n.x = 1
    c = jelly.jelly(n)
    m = jelly.unjelly(c)
    self.assertIsInstance(m, E)
    self.assertEqual(n.x, 1)
