10. unit testing, test cases, assertion error method.ipynb

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   "id": "71497974",
   "metadata": {},
   "outputs": [],
   "source": [
    "def lw(a,b,c,d):\n",
    "    i = a + b\n",
    "    j = c - d\n",
    "    return i, j"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "c51eca11",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(3, -1)"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "lw(1,2,3,4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "cd4c3336",
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "# unit testing\n",
    "def lwsum(a,b):\n",
    "    return a+b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "18786be4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "lwsum(1,2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "cbe100e7",
   "metadata": {},
   "outputs": [],
   "source": [
    "# test cases for unit testing\n",
    "import unittest"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "id": "bf165303",
   "metadata": {},
   "outputs": [],
   "source": [
    "class mylwclass(unittest.TestCase):\n",
    "    def mylw(self):\n",
    "        print(\"For Data...\")\n",
    "#         r =lwsum(3,5)\n",
    "#         print(r)\n",
    "        self.assertEqual(lwsum(3,5),9, msg = \"If test case fails, Contact ID\")\n",
    "        \n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "227d2c9b",
   "metadata": {},
   "outputs": [],
   "source": [
    "a = mylwclass()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "id": "9bc4172f",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "For Data...\n"
     ]
    },
    {
     "ename": "AssertionError",
     "evalue": "8 != 9 : If test case fails, Contact ID",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAssertionError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m~\\AppData\\Local\\Temp/ipykernel_10120/3363838298.py\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ma\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mmylw\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;32m~\\AppData\\Local\\Temp/ipykernel_10120/2716487458.py\u001b[0m in \u001b[0;36mmylw\u001b[1;34m(self)\u001b[0m\n\u001b[0;32m      4\u001b[0m \u001b[1;31m#         r =lwsum(3,5)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      5\u001b[0m \u001b[1;31m#         print(r)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 6\u001b[1;33m         \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0massertEqual\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mlwsum\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m3\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;36m9\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmsg\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;34m\"If test case fails, Contact ID\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      7\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      8\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32mC:\\ProgramData\\Anaconda3\\lib\\unittest\\case.py\u001b[0m in \u001b[0;36massertEqual\u001b[1;34m(self, first, second, msg)\u001b[0m\n\u001b[0;32m    827\u001b[0m         \"\"\"\n\u001b[0;32m    828\u001b[0m         \u001b[0massertion_func\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m_getAssertEqualityFunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfirst\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0msecond\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m--> 829\u001b[1;33m         \u001b[0massertion_func\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfirst\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0msecond\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmsg\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mmsg\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m    830\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    831\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0massertNotEqual\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mfirst\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0msecond\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmsg\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;32mNone\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32mC:\\ProgramData\\Anaconda3\\lib\\unittest\\case.py\u001b[0m in \u001b[0;36m_baseAssertEqual\u001b[1;34m(self, first, second, msg)\u001b[0m\n\u001b[0;32m    820\u001b[0m             \u001b[0mstandardMsg\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;34m'%s != %s'\u001b[0m \u001b[1;33m%\u001b[0m \u001b[0m_common_shorten_repr\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfirst\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0msecond\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    821\u001b[0m             \u001b[0mmsg\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m_formatMessage\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmsg\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mstandardMsg\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m--> 822\u001b[1;33m             \u001b[1;32mraise\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mfailureException\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmsg\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m    823\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    824\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0massertEqual\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mfirst\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0msecond\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmsg\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;32mNone\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mAssertionError\u001b[0m: 8 != 9 : If test case fails, Contact ID"
     ]
    }
   ],
   "source": [
    "a.mylw()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "91bc6425",
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   "source": []
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   "cell_type": "code",
   "execution_count": null,
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