      "\n",
      "        print('Test: One element')\n",
      "        top = Node(5)\n",
      "        stack = Stack(top)\n",
      "        assert_equal(stack.pop(), 5)\n",
      "        assert_equal(stack.peek(), None)\n",
      "\n",
      "        print('Test: More than one element')\n",
      "        stack = Stack()\n",
      "        stack.push(1)\n",
      "        stack.push(2)\n",
 
</s> remove     "        assert_equal(stack.pop(), 5)\n",
    "        assert_equal(stack.peek(), None)\n",
 </s> add     "        self.assertEqual(stack.pop(), 5)\n",
    "        self.assertEqual(stack.peek(), None)\n", </s> remove     "        assert_equal(stack.peek(), None)\n",
    "        assert_equal(stack.pop(), None)\n",
 </s> add     "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.pop(), None)\n", </s> remove     "        assert_equal(stack.peek(), None)\n",
    "        assert_equal(stack.pop(), None)\n",
 </s> add     "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.pop(), None)\n", </s> remove         assert_equal(stack.pop(), 5)
        assert_equal(stack.peek(), None)
 </s> add         self.assertEqual(stack.pop(), 5)
        self.assertEqual(stack.peek(), None) </s> remove     "        assert_equal(stack.pop(), 3)\n",
    "        assert_equal(stack.peek(), 2)\n",
    "        assert_equal(stack.pop(), 2)\n",
    "        assert_equal(stack.peek(), 1)\n",
    "        assert_equal(stack.is_empty(), False)\n",
    "        assert_equal(stack.pop(), 1)\n",
    "        assert_equal(stack.peek(), None)\n",
    "        assert_equal(stack.is_empty(), True)\n",
 </s> add     "        self.assertEqual(stack.pop(), 3)\n",
    "        self.assertEqual(stack.peek(), 2)\n",
    "        self.assertEqual(stack.pop(), 2)\n",
    "        self.assertEqual(stack.peek(), 1)\n",
    "        self.assertEqual(stack.is_empty(), False)\n",
    "        self.assertEqual(stack.pop(), 1)\n",
    "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.is_empty(), True)\n",
    "        self.assertEqual(stack.pop(), 5)\n",
    "        self.assertEqual(stack.peek(), None)\n",
      "\n",
      "        print('Test: One element')\n",
      "        top = Node(5)\n",
      "        stack = Stack(top)\n",
    "        self.assertEqual(stack.pop(), 5)\n",
    "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.pop(), 5)\n",
    "        self.assertEqual(stack.peek(), None)\n",
      "\n",
      "        print('Test: More than one element')\n",
      "        stack = Stack()\n",
      "        stack.push(1)\n",
      "        stack.push(2)\n",
keep keep keep keep replace replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/stack/stack_challenge.ipynb