Add i76_testcase_subclass/

Author: suaaa7

python_test_example/i76_testcase_subclass/__init__.py

@@ -0,0 +1,5 @@
+def concat(str1: str, str2: str) -> str:
+    if not isinstance(str1, str) and isinstance(str2, str):
+        raise TypeError
+
+    return str1 + str2

python_test_example/i76_testcase_subclass/utils.py

@@ -0,0 +1,26 @@
+from unittest import TestCase, main
+
+from i76_testcase_subclass.utils import concat
+
+class UtilsTestCase(TestCase):
+    def test_good_for_concat(self):
+        test_cases = [
+            (('a', 'b'), 'ab'),
+            (('test', 'case'), 'testcase'),
+        ]
+        for value, expected in test_cases:
+            with self.subTest(value):
+                self.assertEqual(expected, concat(value[0], value[1]))
+
+    def test_bad_for_concat(self):
+        test_cases = [
+            (('a', 2), TypeError),
+            ((1, 'b'), TypeError),
+        ]
+        for value, exception in test_cases:
+            with self.subTest(value):
+                with self.assertRaises(exception):
+                    concat(value[0], value[1])
+
+if __name__ == '__main__':
+    main()