add tagging support to events

tests/test_events/test_events.py

@@ -1,12 +1,15 @@
-import random
-import boto3
 import json
-import sure  # noqa
+import random
+import unittest
 
-from moto.events import mock_events
+import boto3
 from botocore.exceptions import ClientError
 from nose.tools import assert_raises
+
 from moto.core import ACCOUNT_ID
+from moto.core.exceptions import JsonRESTError
+from moto.events import mock_events
+from moto.events.models import EventsBackend
 
 RULES = [
     {"Name": "test1", "ScheduleExpression": "rate(5 minutes)"},
@@ -136,14 +139,6 @@ def test_list_rule_names_by_target():
         assert rule in test_2_target["Rules"]
 
 
-@mock_events
-def test_list_rules():
-    client = generate_environment()
-
-    rules = client.list_rules()
-    assert len(rules["Rules"]) == len(RULES)
-
-
 @mock_events
 def test_delete_rule():
     client = generate_environment()
@@ -461,3 +456,58 @@ def test_delete_event_bus_errors():
     client.delete_event_bus.when.called_with(Name="default").should.throw(
         ClientError, "Cannot delete event bus default."
     )
+
+
+@mock_events
+def test_rule_tagging_happy():
+    client = generate_environment()
+    rule_name = get_random_rule()["Name"]
+    rule_arn = client.describe_rule(Name=rule_name).get("Arn")
+
+    tags = [{"Key": "key1", "Value": "value1"}, {"Key": "key2", "Value": "value2"}]
+    client.tag_resource(ResourceARN=rule_arn, Tags=tags)
+
+    actual = client.list_tags_for_resource(ResourceARN=rule_arn).get("Tags")
+    tc = unittest.TestCase("__init__")
+    expected = [{"Value": "value1", "Key": "key1"}, {"Value": "value2", "Key": "key2"}]
+    tc.assertTrue(
+        (expected[0] == actual[0] and expected[1] == actual[1])
+        or (expected[1] == actual[0] and expected[0] == actual[1])
+    )
+
+    client.untag_resource(ResourceARN=rule_arn, TagKeys=["key1"])
+
+    actual = client.list_tags_for_resource(ResourceARN=rule_arn).get("Tags")
+    expected = [{"Key": "key2", "Value": "value2"}]
+    assert expected == actual
+
+
+def freeze_dict(obj):
+    if isinstance(obj, dict):
+        dict_items = list(obj.items())
+        dict_items.append(("__frozen__", True))
+        return tuple([(k, freeze_dict(v)) for k, v in dict_items])
+    return obj
+
+
+@mock_events
+def test_rule_tagging_sad():
+    b = EventsBackend("us-west-2")
+
+    try:
+        b.tag_resource("unknown", [])
+        raise "tag_resource should fail if ResourceARN is not known"
+    except JsonRESTError:
+        pass
+
+    try:
+        b.untag_resource("unknown", [])
+        raise "untag_resource should fail if ResourceARN is not known"
+    except JsonRESTError:
+        pass
+
+    try:
+        b.list_tags_for_resource("unknown")
+        raise "list_tags_for_resource should fail if ResourceARN is not known"
+    except JsonRESTError:
+        pass