UPDATE

location_data/test_cluster_recommendation_api.py

@@ -279,3 +279,37 @@ class RemoteSensingClusterRecommendationApiTests(TestCase):
             response.json()["msg"],
             "برای این مزرعه هنوز هیچ گیاهی در farm_data ثبت نشده است.",
         )
+
+    @patch("location_data.cluster_recommendation._simulate_candidate")
+    def test_cluster_recommendations_use_cached_payload_for_same_farm_assignments(self, simulate_mock):
+        simulate_mock.return_value = (
+            {
+                "engine": "pcse",
+                "model_name": "Wofost81_NWLP_CWB_CNB",
+                "metrics": {
+                    "yield_estimate": 100.0,
+                    "biomass": 200.0,
+                    "max_lai": 3.1,
+                },
+            },
+            None,
+        )
+
+        first_response = self.client.get(
+            "/remote-sensing/cluster-recommendations/",
+            data={"farm_uuid": str(self.farm.farm_uuid)},
+        )
+        self.assertEqual(first_response.status_code, 200)
+        self.assertGreater(simulate_mock.call_count, 0)
+
+        simulate_mock.reset_mock()
+        simulate_mock.side_effect = AssertionError("cached recommendations should skip simulation")
+
+        second_response = self.client.get(
+            "/remote-sensing/cluster-recommendations/",
+            data={"farm_uuid": str(self.farm.farm_uuid)},
+        )
+
+        self.assertEqual(second_response.status_code, 200)
+        self.assertEqual(first_response.json()["data"], second_response.json()["data"])
+        simulate_mock.assert_not_called()