      "class TestFindDiff(object):\n",
      "\n",
      "    def test_find_diff(self):\n",
      "        solution = Solution()\n",
      "        assert_raises(TypeError, solution.find_diff, None)\n",
      "        assert_equal(solution.find_diff('ab', 'aab'), 'a')\n",
      "        assert_equal(solution.find_diff('aab', 'ab'), 'a')\n",
      "        assert_equal(solution.find_diff('abcd', 'abcde'), 'e')\n",
      "        assert_equal(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
      "        assert_equal(solution.find_diff_xor('ab', 'aab'), 'a')\n",
      "        assert_equal(solution.find_diff_xor('aab', 'ab'), 'a')\n",
      "        assert_equal(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
      "        assert_equal(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
      "        print('Success: test_find_diff')\n",
      "\n",
      "\n",
      "def main():\n",
      "    test = TestFindDiff()\n",
 
</s> remove     "        assert_raises(TypeError, solution.find_diff, None)\n",
    "        assert_equal(solution.find_diff('ab', 'aab'), 'a')\n",
    "        assert_equal(solution.find_diff('aab', 'ab'), 'a')\n",
    "        assert_equal(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        assert_equal(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        assert_equal(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        assert_equal(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        assert_equal(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        assert_equal(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
 </s> add     "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n", </s> remove     "class TestFindDiff(object):\n",
 </s> add     "class TestFindDiff(unittest.TestCase):\n", </s> remove     "class TestFindDiff(object):\n",
 </s> add     "class TestFindDiff(unittest.TestCase):\n", </s> remove     "        assert_raises(TypeError, solution.fizz_buzz, None)\n",
    "        assert_raises(ValueError, solution.fizz_buzz, 0)\n",
 </s> add     "        self.assertRaises(TypeError, solution.fizz_buzz, None)\n",
    "        self.assertRaises(ValueError, solution.fizz_buzz, 0)\n", </s> remove     "        assert_raises(TypeError, solution.fizz_buzz, None)\n",
    "        assert_raises(ValueError, solution.fizz_buzz, 0)\n",
 </s> add     "        self.assertRaises(TypeError, solution.fizz_buzz, None)\n",
    "        self.assertRaises(ValueError, solution.fizz_buzz, 0)\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
      "class TestFindDiff(object):\n",
      "\n",
      "    def test_find_diff(self):\n",
      "        solution = Solution()\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertRaises(TypeError, solution.find_diff, None)\n",
    "        self.assertEqual(solution.find_diff('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff('aaabbcdd', 'abdbacade'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('ab', 'aab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('aab', 'ab'), 'a')\n",
    "        self.assertEqual(solution.find_diff_xor('abcd', 'abcde'), 'e')\n",
    "        self.assertEqual(solution.find_diff_xor('aaabbcdd', 'abdbacade'), 'e')\n",
      "        print('Success: test_find_diff')\n",
      "\n",
      "\n",
      "def main():\n",
      "    test = TestFindDiff()\n",
keep keep keep keep replace replace replace replace replace replace replace replace replace keep keep keep keep keep
 #273: Remove nose dependency for arrays_strings/ (#274) 
arrays_strings/str_diff/str_diff_challenge.ipynb