      "class TestSelectionSort(object):\n",
      "\n",
      "    def test_selection_sort(self, func):\n",
      "        print('None input')\n",
      "        data = None\n",
      "        func(data)\n",
      "        assert_equal(data, None)\n",
      "\n",
      "        print('Empty input')\n",
      "        data = []\n",
      "        func(data)\n",
      "        assert_equal(data, [])\n",
 
</s> remove     "        data = None\n",
    "        func(data)\n",
    "        assert_equal(data, None)\n",
 </s> add     "        assert_raises(TypeError, func, None)\n", </s> remove     "        data = []\n",
    "        func(data)\n",
    "        assert_equal(data, [])\n",
 </s> add     "        assert_equal(func([]), [])\n", </s> remove     "        data = []\n",
    "        func(data)\n",
    "        assert_equal(data, [])\n",
 </s> add     "        assert_equal(func([]), [])\n", </s> remove     "        data = [5]\n",
    "        func(data)\n",
    "        assert_equal(data, [5])\n",
 </s> add     "        assert_equal(func([5]), [5])\n", </s> remove     "        data = [5]\n",
    "        func(data)\n",
    "        assert_equal(data, [5])\n",
 </s> add     "        assert_equal(func([5]), [5])\n",
    "        assert_raises(TypeError, func, None)\n",
      "class TestSelectionSort(object):\n",
      "\n",
      "    def test_selection_sort(self, func):\n",
      "        print('None input')\n",
    "        assert_raises(TypeError, func, None)\n",
    "        assert_raises(TypeError, func, None)\n",
    "        assert_raises(TypeError, func, None)\n",
      "\n",
      "        print('Empty input')\n",
      "        data = []\n",
      "        func(data)\n",
      "        assert_equal(data, [])\n",
keep keep keep keep replace replace replace keep keep keep keep keep
 Update selection sort challenge (#131)

Update constraints, test cases, code, and tests. 
sorting_searching/selection_sort/selection_sort_challenge.ipynb