def test_step(priority_queue: PriorityQueue) -> None:
original = deepcopy(priority_queue)
result = priority_queue.pop()
assert all(not item < priority_queue._item_factory(result)
for item in priority_queue._items)
assert len(priority_queue) == len(original) - 1
def test_step(priority_queue: PriorityQueue) -> None:
result = priority_queue.peek()
assert result in priority_queue.values()
assert all(not item < priority_queue._item_factory(result)
for item in priority_queue._items)