Fix worker control fallback for running detect workers

domain-api/tests/test_worker_control_service.py

@@ -0,0 +1,38 @@
+import json
+import unittest
+from unittest.mock import Mock, patch
+
+from app.services.worker_control_service import WORKER_CONTROL_CHANNEL, WORKER_PENDING_COMMAND_KEY, send_worker_command
+
+
+class WorkerControlServiceTests(unittest.TestCase):
+    @patch("app.services.worker_control_service.get_redis")
+    def test_send_worker_command_persists_request_id_and_publishes_same_payload(self, mock_get_redis) -> None:
+        redis_client = Mock()
+        mock_get_redis.return_value = redis_client
+
+        ok, message = send_worker_command(
+            "start_detection",
+            payload={"job_id": 1, "job_code": "detect-20260419030000-abc123"},
+        )
+
+        self.assertTrue(ok)
+        self.assertIn("已发送 Worker 控制指令", message)
+
+        redis_client.set.assert_called_once()
+        set_args = redis_client.set.call_args.args
+        self.assertEqual(WORKER_PENDING_COMMAND_KEY, set_args[0])
+        serialized = set_args[1]
+        self.assertEqual(120, redis_client.set.call_args.kwargs["ex"])
+
+        payload = json.loads(serialized)
+        self.assertEqual("start_detection", payload["action"])
+        self.assertEqual(1, payload["job_id"])
+        self.assertEqual("detect-20260419030000-abc123", payload["job_code"])
+        self.assertTrue(payload["request_id"].startswith("workerctl-"))
+
+        redis_client.publish.assert_called_once_with(WORKER_CONTROL_CHANNEL, serialized)
+
+
+if __name__ == "__main__":
+    unittest.main()