def test_bool(self):
        prio_set_list = event._PrioritizedSetList()

        assert bool(prio_set_list) is False

        prio_set_list.add(0, None)
        assert bool(prio_set_list) is True
def reorder_item(self, item, position):
    new_position = min(max(position, 0), len(self._items) - 1)