add tagging support to events

moto/events/models.py

@@ -6,6 +6,7 @@ from boto3 import Session
 from moto.core.exceptions import JsonRESTError
 from moto.core import BaseBackend, BaseModel
 from moto.sts.models import ACCOUNT_ID
+from moto.utilities.tagging_service import TaggingService
 
 
 class Rule(BaseModel):
@@ -104,6 +105,7 @@ class EventsBackend(BaseBackend):
         self.region_name = region_name
         self.event_buses = {}
         self.event_sources = {}
+        self.tagger = TaggingService()
 
         self._add_default_event_bus()
 
@@ -361,6 +363,32 @@ class EventsBackend(BaseBackend):
 
         self.event_buses.pop(name, None)
 
+    def list_tags_for_resource(self, arn):
+        name = arn.split("/")[-1]
+        if name in self.rules:
+            return self.tagger.list_tags_for_resource(self.rules[name].arn)
+        raise JsonRESTError(
+            "ResourceNotFoundException", "An entity that you specified does not exist."
+        )
+
+    def tag_resource(self, arn, tags):
+        name = arn.split("/")[-1]
+        if name in self.rules:
+            self.tagger.tag_resource(self.rules[name].arn, tags)
+            return {}
+        raise JsonRESTError(
+            "ResourceNotFoundException", "An entity that you specified does not exist."
+        )
+
+    def untag_resource(self, arn, tag_names):
+        name = arn.split("/")[-1]
+        if name in self.rules:
+            self.tagger.untag_resource_using_names(self.rules[name].arn, tag_names)
+            return {}
+        raise JsonRESTError(
+            "ResourceNotFoundException", "An entity that you specified does not exist."
+        )
+
 
 events_backends = {}
 for region in Session().get_available_regions("events"):

moto/events/responses.py

@@ -297,3 +297,26 @@ class EventsHandler(BaseResponse):
         self.events_backend.delete_event_bus(name)
 
         return "", self.response_headers
+
+    def list_tags_for_resource(self):
+        arn = self._get_param("ResourceARN")
+
+        result = self.events_backend.list_tags_for_resource(arn)
+
+        return json.dumps(result), self.response_headers
+
+    def tag_resource(self):
+        arn = self._get_param("ResourceARN")
+        tags = self._get_param("Tags")
+
+        result = self.events_backend.tag_resource(arn, tags)
+
+        return json.dumps(result), self.response_headers
+
+    def untag_resource(self):
+        arn = self._get_param("ResourceARN")
+        tags = self._get_param("TagKeys")
+
+        result = self.events_backend.untag_resource(arn, tags)
+
+        return json.dumps(result), self.response_headers