      "class TestMergeSort(object):\n",
      "    def test_merge_sort(self):\n",
      "        print('Empty input')\n",
      "        data = []\n",
      "        merge_sort(data)\n",
      "        assert_equal(data, [])\n",
      "\n",
      "        print('One element')\n",
      "        data = [5]\n",
      "        merge_sort(data)\n",
      "        assert_equal(data, [5])\n",
 
</s>
    "        sorted_data = merge_sort(data)\n",
    "        assert_equal(sorted_data, [])\n",
      "class TestMergeSort(object):\n",
      "    def test_merge_sort(self):\n",
      "        print('Empty input')\n",
      "        data = []\n",
    "        sorted_data = merge_sort(data)\n",
    "        assert_equal(sorted_data, [])\n",
    "        sorted_data = merge_sort(data)\n",
    "        assert_equal(sorted_data, [])\n",
      "\n",
      "        print('One element')\n",
      "        data = [5]\n",
      "        merge_sort(data)\n",
      "        assert_equal(data, [5])\n",
keep keep keep keep replace replace keep keep keep keep keep
 the 'Two or more elements' test doesn't actually test if the list was sorted properly
sorting_searching/merge_sort/merge_sort_solution.ipynb