def test_check_not_empty():
q = Queue()
q.enqueue("apple")
q.enqueue("banana")
actual = q.q_is_empty()
expected = False
assert actual == expected
def test_dequeue_until_empty():
q = Queue()
q.enqueue("apple")
q.enqueue("banana")
q.enqueue("cucumber")
q.dequeue()
q.dequeue()
q.dequeue()
actual = q.q_is_empty()
expected = True
assert actual == expected
