def test_work():
q = Queue(3)
assert q.enqueue(7)
assert q.dequeue()
assert q.front() == -1
assert not q.dequeue()
assert q.front() == -1
assert q.rear() == -1
assert q.enqueue(0)
assert not q.is_full()
assert q.dequeue()
assert q.enqueue(3)
assert q.enqueue(4)
assert q.enqueue(5)
assert q.is_full()
assert q.front() == 3
assert q.rear() == 5
def test_enqueue_dequeue():
q = Queue(3)
for val in range(1, 4):
q.enqueue(val)
assert q.front() == 1
assert q.rear() == 3
assert q.dequeue()
assert q.front() == 2
assert q.rear() == 3
assert q.dequeue()
assert q.front() == 3
assert q.enqueue(10)
assert q.rear() == 10