def test_basic(priority_queue: PriorityQueue) -> None: result = priority_queue.clear() assert result is None
def test_properties(priority_queue: PriorityQueue) -> None: priority_queue.clear() assert len(priority_queue) == 0
def test_basic(priority_queue: PriorityQueue) -> None: result = priority_queue.clear() assert result is None
def test_properties(priority_queue: PriorityQueue) -> None: priority_queue.clear() assert len(priority_queue) == 0