Fix CloudFormation AWS::Logs::LogGroup tagging (#7039)

moto/logs/models.py

@@ -410,7 +410,9 @@ class LogGroup(CloudFormationModel):
         **kwargs: Any,
     ) -> "LogGroup":
         properties = cloudformation_json["Properties"]
-        tags = properties.get("Tags", {})
+        tags = properties.get("Tags", [])
+        tags = dict([tag.values() for tag in tags])
+
         return logs_backends[account_id][region_name].create_log_group(
             resource_name, tags, **properties
         )

tests/test_logs/test_logs_cloudformation.py

@@ -0,0 +1,31 @@
+import json
+
+import boto3
+
+from moto import mock_cloudformation, mock_logs
+
+
+@mock_logs
+@mock_cloudformation
+def test_tagging():
+    logs_client = boto3.client("logs", region_name="us-east-1")
+    cf_client = boto3.client("cloudformation", region_name="us-east-1")
+
+    template = {
+        "AWSTemplateFormatVersion": "2010-09-09",
+        "Resources": {
+            "testGroup": {
+                "Type": "AWS::Logs::LogGroup",
+                "Properties": {"Tags": [{"Key": "foo", "Value": "bar"}]},
+            }
+        },
+    }
+    template_json = json.dumps(template)
+    cf_client.create_stack(
+        StackName="test_stack",
+        TemplateBody=template_json,
+    )
+
+    arn = logs_client.describe_log_groups()["logGroups"][0]["arn"]
+    tags = logs_client.list_tags_for_resource(resourceArn=arn)["tags"]
+    assert tags == {"foo": "bar"}