def test_reverse_single_notification(self): # Regression test for double notification. notifier = unittest.mock.Mock() tl = TraitList([1, 2, 3, 4, 5], notifiers=[notifier]) notifier.assert_not_called() tl.reverse() self.assertEqual(notifier.call_count, 1)
def test_reverse_empty_list(self): tl = TraitList([], item_validator=int_item_validator, notifiers=[self.notification_handler]) tl.reverse() self.assertIsNone(self.index) self.assertIsNone(self.removed) self.assertIsNone(self.added)
def test_reverse(self): tl = TraitList([1, 2, 3, 4, 5], item_validator=int_item_validator, notifiers=[self.notification_handler]) tl.reverse() self.assertEqual(tl, [5, 4, 3, 2, 1]) self.assertEqual(self.index, 0) self.assertEqual(self.removed, [1, 2, 3, 4, 5]) self.assertEqual(self.added, [5, 4, 3, 2, 1])