def test_front_of_non_empty_queue_returns_first_in_value(self):
queue = Queue()
queue.enqueue(0)
queue.enqueue(1)
queue.enqueue(2)
assert queue.front() == 0
queue.dequeue()
assert queue.front() == 1
def test_get_front_of_empty_queue_raises_empty_queue_exception(self):
queue = Queue()
with raises(Queue.EmptyQueueException):
queue.front()