회기 연속성과 멀티 케이스 계약을 영속화

apps/api/app/test_evaluation_persistence.py

@@ -429,6 +429,46 @@ class EvaluationPersistenceMappingTest(unittest.IsolatedAsyncioTestCase):
         self.assertNotIn("010-1234-5678", blob)
         self.assertIn("[NAME]", blob)
         self.assertIn("[PHONE]", blob)
+        self.assertIn(
+            "WHERE app.session_evaluation.status <> 'ready'",
+            conn.executed[0][0],
+        )
+
+    def test_late_error_never_replaces_ready_evaluation_record(self) -> None:
+        ready = {"status": "ready", "payload": {"strengths": ["완료"]}}
+        error = {"status": "error", "error": "late timeout"}
+
+        self.assertFalse(
+            session_persistence._should_replace_evaluation_record(ready, error)
+        )
+        self.assertTrue(
+            session_persistence._should_replace_evaluation_record(error, ready)
+        )
+        self.assertTrue(
+            session_persistence._should_replace_evaluation_record(ready, ready)
+        )
+
+    async def test_fallback_cache_keeps_ready_result_when_late_error_arrives(self) -> None:
+        session_id = "11111111-1111-1111-1111-111111111111"
+        session_persistence._EVALUATION_CACHE[session_id] = {"status": "ready"}
+        self.addCleanup(session_persistence._EVALUATION_CACHE.pop, session_id, None)
+        write = session_persistence.SessionEvaluationWrite.from_error(
+            session_id=session_id,
+            learner_id="22222222-2222-2222-2222-222222222222",
+            scope="session_end",
+            stage="정리",
+            error="late timeout",
+        )
+
+        with (
+            patch.object(session_persistence, "runtime_fallback_allowed", return_value=True),
+            patch.object(session_persistence, "get_pool", side_effect=RuntimeError("offline")),
+            patch.object(session_persistence, "require_runtime_fallback_allowed"),
+        ):
+            saved = await session_persistence.save_session_evaluation(write)
+
+        self.assertFalse(saved)
+        self.assertEqual(session_persistence._EVALUATION_CACHE[session_id]["status"], "ready")
 
     def test_rebuild_turn_evaluation_restores_review_shape(self) -> None:
         rebuilt = session_persistence._rebuild_turn_evaluations(