added tests for 'chat.py'

chatmastermind/tags.py

@@ -77,7 +77,8 @@ def match_tags(tags: set[Tag], tags_or: Optional[set[Tag]], tags_and: Optional[s
     i. e. you can select a TagLine if it either contains one of the tags in 'tags_or'
     or all of the tags in 'tags_and' but it must never contain any of the tags in
     'tags_not'. If 'tags_or' and 'tags_and' are 'None', they match all tags (tag
-    exclusion is still done if 'tags_not' is not 'None').
+    exclusion is still done if 'tags_not' is not 'None'). If they are empty (set()),
+    they match no tags.
     """
     required_tags_present = False
     excluded_tags_missing = False

tests/test_tags.py

@@ -144,3 +144,20 @@ class TestTagLine(CmmTestCase):
         # Test case 9: 'tags_or' and 'tags_and' are None, match all tags except excluded tags
         tags_not = {Tag('tag2')}
         self.assertFalse(tagline.match_tags(None, None, tags_not))
+
+        # Test case 10: 'tags_or' and 'tags_and' are empty, match no tags
+        self.assertFalse(tagline.match_tags(set(), set(), None))
+
+        # Test case 11: 'tags_or' is empty, match no tags
+        self.assertFalse(tagline.match_tags(set(), None, None))
+
+        # Test case 12: 'tags_and' is empty, match no tags
+        self.assertFalse(tagline.match_tags(None, set(), None))
+
+        # Test case 13: 'tags_or' is empty, match 'tags_and'
+        tags_and = {Tag('tag1'), Tag('tag2')}
+        self.assertTrue(tagline.match_tags(None, tags_and, None))
+
+        # Test case 14: 'tags_and' is empty, match 'tags_or'
+        tags_or = {Tag('tag1'), Tag('tag2')}
+        self.assertTrue(tagline.match_tags(tags_or, None, None))