          print('Test: Enqueue to an empty queue')
          queue.enqueue(1)
  
          print('Test: Dequeue a queue with one element')
          assert_equal(queue.dequeue(), 1)
  
          print('Test: Enqueue to a non-empty queue')
          queue.enqueue(2)
          queue.enqueue(3)
          queue.enqueue(4)
 
</s> remove         assert_equal(queue.dequeue(), None)
 </s> add         self.assertEqual(queue.dequeue(), None) </s> remove     "        assert_equal(queue.dequeue(), 1)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), 1)\n", </s> remove     "        assert_equal(queue.dequeue(), 1)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), 1)\n", </s> remove         assert_equal(queue.dequeue(), 2)
        assert_equal(queue.dequeue(), 3)
        assert_equal(queue.dequeue(), 4)
 </s> add         self.assertEqual(queue.dequeue(), 2)
        self.assertEqual(queue.dequeue(), 3)
        self.assertEqual(queue.dequeue(), 4) </s> remove     "        assert_equal(queue.dequeue(), None)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), None)\n",
        self.assertEqual(queue.dequeue(), 1)
          print('Test: Enqueue to an empty queue')
          queue.enqueue(1)
  
          print('Test: Dequeue a queue with one element')
        self.assertEqual(queue.dequeue(), 1)
  
          print('Test: Enqueue to a non-empty queue')
          queue.enqueue(2)
          queue.enqueue(3)
          queue.enqueue(4)
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/queue_list/test_queue_list.py