def test_creating_and_rank(self):
item1 = MenuItem(name='1', urlstr='/1/')
item1.save()
self.assertEqual(item1.rank, 0)
self.assert_(item1.is_first())
self.assert_(item1.is_last())
item2 = MenuItem(name='2', urlstr='/2/')
item2.save()
self.assertEqual(item2.rank, 1)
self.failIf(item2.is_first())
self.assert_(item2.is_last())
self.failIf(item1.is_last())
self.assert_(item1.is_first())
item3 = MenuItem(name='3', urlstr='/3/')
item3.save()
self.assertEqual(item3.rank, 2)
self.failIf(item2.is_first())
self.failIf(item2.is_last())
