      "    # method in addition to the following end-to-end test\n",
      "    def test_end_to_end(self):\n",
      "        print('Test: Dequeue an empty queue')\n",
      "        queue = Queue()\n",
      "        assert_equal(queue.dequeue(), None)\n",
      "\n",
      "        print('Test: Enqueue to an empty queue')\n",
      "        queue.enqueue(1)\n",
      "\n",
      "        print('Test: Dequeue a queue with one element')\n",
 
</s> remove     "        assert_equal(queue.dequeue(), None)\n",
 </s> add     "        self.assertEqual(queue.dequeue(), None)\n", </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     "class TestQueue(object):\n",
 </s> add     "class TestQueue(unittest.TestCase):\n",
    "        self.assertEqual(queue.dequeue(), None)\n",
      "    # method in addition to the following end-to-end test\n",
      "    def test_end_to_end(self):\n",
      "        print('Test: Dequeue an empty queue')\n",
      "        queue = Queue()\n",
    "        self.assertEqual(queue.dequeue(), None)\n",
      "\n",
      "        print('Test: Enqueue to an empty queue')\n",
      "        queue.enqueue(1)\n",
      "\n",
      "        print('Test: Dequeue a queue with one element')\n",
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/queue_list/queue_list_challenge.ipynb