Keep enrichment locks alive during long batches

tests/test_mobilede_enrichment.py

@@ -81,7 +81,39 @@ class TestMobileDeEnrichment(unittest.TestCase):
         self.assertGreaterEqual(selector_kwargs["stale_before"], before)
         self.assertLessEqual(selector_kwargs["stale_before"], after)
         self.assertEqual(scraper.sync_detail.call_count, 2)
-        redis_client.eval.assert_called()
+        # Two heartbeat refreshes plus owner-safe release.
+        self.assertGreaterEqual(redis_client.eval.call_count, 3)
+
+    def test_task_stops_when_enrichment_lock_ownership_is_lost(self) -> None:
+        enrichment = SimpleNamespace(
+            enabled=True,
+            batch_size=1,
+            max_existing_images=1,
+            staleness_hours=48,
+            delay_seconds=0.0,
+        )
+        runtime_config = SimpleNamespace(mobilede=SimpleNamespace(enrichment=enrichment))
+        redis_client = MagicMock()
+        redis_client.set.return_value = True
+        redis_client.eval.side_effect = [0, 0]
+        persistence = MagicMock()
+        persistence.get_active_cars_batch_for_image_enrich.return_value = [
+            (1, "mobile.de:111", "https://suchen.mobile.de/fahrzeuge/details.html?id=111", 0),
+        ]
+        scraper = MagicMock()
+
+        with (
+            patch.object(tasks, "Settings", return_value=SimpleNamespace(runtime_config_file="runtime_config.json")),
+            patch.object(tasks.RuntimeConfig, "from_file", return_value=runtime_config),
+            patch.object(tasks, "_get_redis", return_value=redis_client),
+            patch.object(tasks, "_get_persistence", return_value=persistence),
+            patch.object(tasks, "MobileDeScraper", return_value=scraper),
+        ):
+            result = tasks.mobilede_enrich_images_batch_task.run()
+
+        self.assertEqual(result["status"], "lock_lost")
+        self.assertEqual(result["enriched"], 0)
+        scraper.sync_detail.assert_not_called()
 
     def test_task_skips_when_enrichment_lock_is_held(self) -> None:
         enrichment = SimpleNamespace(