def test_add(self):
     ta = (1, 2, 3)
     l = zip(ta, ta)
     dl = IntDisplayList(l)[:]
     self.assertTrue(dl == l)
     l.append((4, 4))
     dl.append((4, 4))
     self.assertTrue(dl == l)
 def test_add(self):
     ta = (1, 2, 3)
     l = zip(ta, ta)
     dl = IntDisplayList(l)[:]
     self.assertTrue(dl == l)
     l.append((4, 4))
     dl.append((4, 4))
     self.assertTrue(dl == l)