update

module5.ipynb

@@ -390,21 +390,34 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import unittest\n",
-    "class TestStringMethods(unittest.TestCase):\n",
-    "    def test_upper(self):\n",
-    "        self.assertEqual('foo'.upper(), 'FOO')\n",
-    "    def test_isupper(self):\n",
-    "        self.assertTrue('FOO'.isupper())\n",
-    "        self.assertFalse('Foo'.isupper())\n",
-    "    def test_split(self):\n",
-    "        s = 'hello world'\n",
-    "        self.assertEqual(s.split(), ['hello', 'world'])\n",
-    "        # check that s.split fails when the separator is not a string\n",
-    "        with self.assertRaises(TypeError): \n",
-    "            s.split(2)\n",
-    "if __name__ == '__main__':\n",
-    "    unittest.main()"
+    "import unittest \n",
+    "class TestStringMethods(unittest.TestCase): \n",
+    "    def test_upper(self): \n",
+    "        # This function tests whether 'foo' in lowercase converts to uppercase correctly.\n",
+    "        # If not, it will fail.\n",
+    "        self.assertEqual('foo'.upper(), 'FOO') \n",
+    "    def test_isupper(self): \n",
+    "        # This function tests two things:\n",
+    "        # 1) The string 'FOO' is already in uppercase and therefore should return True when\n",
+    "        # the method .isupper() is called on it. If not, it will fail.\n",
+    "        # 2) The string 'Foo' is not entirely in uppercase (it contains a lowercase letter)\n",
+    "        # and therefore should return False when the method .isupper() is called on it.\n",
+    "        # If not, it will also fail.\n",
+    "        self.assertTrue('FOO'.isupper())  \n",
+    "        self.assertFalse('Foo'.isupper()) \n",
+    "    def test_split(self): \n",
+    "        # This function tests the split method of strings:\n",
+    "        # It first creates a string 'hello world', and checks whether it is correctly split\n",
+    "        # into two separate words when the method .split() is called on it. If not, it will fail.\n",
+    "        s = 'hello world'  \n",
+    "        self.assertEqual(s.split(), ['hello', 'world'])   \n",
+    "        # This tests that if you call s.split(2) (where 2 isn't a string separator),\n",
+    "        # Python raises a TypeError. If it doesn’t or if it wrongly returns something else,\n",
+    "        # the test will fail.\n",
+    "        with self.assertRaises(TypeError):  \n",
+    "            s.split(2) \n",
+    "if __name__ == '__main__': \n",
+    "    unittest.main() \n"
    ]
   },
   {
@@ -501,6 +514,13 @@
     "\ttest_results = result_file.read()\n",
     "print(test_results)"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {