services/logs: Support ListLogGroups

purcell · purcell · commit 7df1ef3b722f · 2025-11-05T13:12:43.000Z
This operation was flagged as missing in parity tests.
diff --git a/localstack-core/localstack/services/logs/provider.py b/localstack-core/localstack/services/logs/provider.py
@@ -22,10 +22,13 @@
     InputLogEvents,
     InvalidParameterException,
     KmsKeyId,
+    ListLogGroupsRequest,
+    ListLogGroupsResponse,
     ListTagsForResourceResponse,
     ListTagsLogGroupResponse,
     LogGroupClass,
     LogGroupName,
+    LogGroupSummary,
     LogsApi,
     LogStreamName,
     PutLogEventsResponse,
@@ -138,6 +141,20 @@ def describe_log_streams(
 
         return moto.call_moto_with_request(context, request_copy)
 
+    @handler("ListLogGroups", expand=False)
+    def list_log_groups(
+        self, context: RequestContext, request: ListLogGroupsRequest
+    ) -> ListLogGroupsResponse:
+        pattern: str | None = request.get("logGroupNamePattern")
+        region_backend: LogsBackend = get_moto_logs_backend(context.account_id, context.region)
+        moto_groups = copy.deepcopy(region_backend.groups).values()
+        groups = [
+            LogGroupSummary(logGroupName=group.name, logGroupArn=group.arn)
+            for group in sorted(moto_groups, key=lambda g: g.name)
+            if not pattern or pattern in group.name
+        ]
+        return ListLogGroupsResponse(logGroups=groups)
+
     def create_log_group(
         self,
         context: RequestContext,
diff --git a/tests/aws/services/logs/test_logs.py b/tests/aws/services/logs/test_logs.py
@@ -204,6 +204,13 @@ def test_create_and_delete_log_stream(self, logs_log_group, aws_client, region_n
             )
         snapshot.match("error-describe-logs-group", ctx.value.response)
 
+        response = aws_client.logs.list_log_groups(logGroupNamePattern="no-such-group")
+        snapshot.match("list-log-groups-pattern-no-match", response)
+        response = aws_client.logs.list_log_groups(
+            logGroupNamePattern=logs_log_group.split("-")[-1]
+        )
+        snapshot.match("list-log-groups-pattern-match", response)
+
         aws_client.logs.create_log_stream(logGroupName=logs_log_group, logStreamName=test_name)
         log_streams_between = aws_client.logs.describe_log_streams(logGroupName=logs_log_group).get(
             "logStreams", []
diff --git a/tests/aws/services/logs/test_logs.snapshot.json b/tests/aws/services/logs/test_logs.snapshot.json
@@ -140,13 +140,15 @@
     }
   },
   "tests/aws/services/logs/test_logs.py::TestCloudWatchLogs::test_create_and_delete_log_stream": {
-    "recorded-date": "06-04-2023, 11:42:42",
+    "recorded-date": "05-11-2025, 11:28:57",
     "recorded-content": {
       "describe-log-groups-prefix": {
         "logGroups": [
           {
             "arn": "arn:<partition>:logs:<region>:111111111111:log-group:<log-group-name:1>:*",
             "creationTime": "timestamp",
+            "logGroupArn": "arn:<partition>:logs:<region>:111111111111:log-group:<log-group-name:1>",
+            "logGroupClass": "STANDARD",
             "logGroupName": "<log-group-name:1>",
             "metricFilterCount": 0,
             "storedBytes": 0
@@ -162,7 +164,10 @@
           {
             "arn": "arn:<partition>:logs:<region>:111111111111:log-group:<log-group-name:1>:*",
             "creationTime": "timestamp",
-            "logGroupName": "<log-group-name:1>"
+            "logGroupArn": "arn:<partition>:logs:<region>:111111111111:log-group:<log-group-name:1>",
+            "logGroupClass": "STANDARD",
+            "logGroupName": "<log-group-name:1>",
+            "metricFilterCount": 0
           }
         ],
         "nextToken": "<next_token>",
@@ -181,6 +186,27 @@
           "HTTPStatusCode": 400
         }
       },
+      "list-log-groups-pattern-no-match": {
+        "logGroups": [],
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "list-log-groups-pattern-match": {
+        "logGroups": [
+          {
+            "logGroupArn": "arn:<partition>:logs:<region>:111111111111:log-group:<log-group-name:1>",
+            "logGroupClass": "STANDARD",
+            "logGroupName": "<log-group-name:1>"
+          }
+        ],
+        "nextToken": "<next_token>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
       "logs_log_group": [
         {
           "logStreamName": "<log-stream-name:1>",
diff --git a/tests/aws/services/logs/test_logs.validation.json b/tests/aws/services/logs/test_logs.validation.json
@@ -3,7 +3,13 @@
     "last_validated_date": "2024-05-24T13:57:11+00:00"
   },
   "tests/aws/services/logs/test_logs.py::TestCloudWatchLogs::test_create_and_delete_log_stream": {
-    "last_validated_date": "2023-04-06T09:42:42+00:00"
+    "last_validated_date": "2025-11-05T11:29:04+00:00",
+    "durations_in_seconds": {
+      "setup": 1.86,
+      "call": 2.59,
+      "teardown": 0.15,
+      "total": 4.6
+    }
   },
   "tests/aws/services/logs/test_logs.py::TestCloudWatchLogs::test_filter_log_events_response_header": {
     "last_validated_date": "2024-05-24T13:58:30+00:00"
