add tagging support to events

tests/test_utilities/test_tagging_service.py

@@ -0,0 +1,59 @@
+import unittest
+
+from moto.utilities.tagging_service import TaggingService
+
+
+class TestTaggingService(unittest.TestCase):
+    def test_list_empty(self):
+        svc = TaggingService()
+        result = svc.list_tags_for_resource("test")
+        self.assertEqual(result, {"Tags": []})
+
+    def test_create_tag(self):
+        svc = TaggingService("TheTags", "TagKey", "TagValue")
+        tags = [{"TagKey": "key_key", "TagValue": "value_value"}]
+        svc.tag_resource("arn", tags)
+        actual = svc.list_tags_for_resource("arn")
+        expected = {"TheTags": [{"TagKey": "key_key", "TagValue": "value_value"}]}
+        self.assertDictEqual(expected, actual)
+
+    def test_create_tag_without_value(self):
+        svc = TaggingService()
+        tags = [{"Key": "key_key"}]
+        svc.tag_resource("arn", tags)
+        actual = svc.list_tags_for_resource("arn")
+        expected = {"Tags": [{"Key": "key_key", "Value": None}]}
+        self.assertDictEqual(expected, actual)
+
+    def test_delete_tag_using_names(self):
+        svc = TaggingService()
+        tags = [{"Key": "key_key", "Value": "value_value"}]
+        svc.tag_resource("arn", tags)
+        svc.untag_resource_using_names("arn", ["key_key"])
+        result = svc.list_tags_for_resource("arn")
+        self.assertEqual(result, {"Tags": []})
+
+    def test_list_empty_delete(self):
+        svc = TaggingService()
+        svc.untag_resource_using_names("arn", ["key_key"])
+        result = svc.list_tags_for_resource("arn")
+        self.assertEqual(result, {"Tags": []})
+
+    def test_delete_tag_using_tags(self):
+        svc = TaggingService()
+        tags = [{"Key": "key_key", "Value": "value_value"}]
+        svc.tag_resource("arn", tags)
+        svc.untag_resource_using_tags("arn", tags)
+        result = svc.list_tags_for_resource("arn")
+        self.assertEqual(result, {"Tags": []})
+
+    def test_extract_tag_names(self):
+        svc = TaggingService()
+        tags = [{"Key": "key1", "Value": "value1"}, {"Key": "key2", "Value": "value2"}]
+        actual = svc.extract_tag_names(tags)
+        expected = ["key1", "key2"]
+        self.assertEqual(expected, actual)
+
+
+if __name__ == "__main__":
+    unittest.main()