Add generation harness runtime

backend/tests/test_generation_jobs.py

@@ -165,6 +165,70 @@ async def test_unified_generation_is_queued_then_worker_persists_story_and_event
         app.dependency_overrides.clear()
 
 
+async def test_generation_worker_records_quality_gate_failure_without_persisting_story(
+    db_session,
+    test_user,
+):
+    invalid_output = StoryOutput(
+        mode="generated",
+        title="空白故事",
+        story_text="",
+        cover_prompt_suggestion="A blank cover",
+    )
+    job = await create_generation_job(
+        db_session,
+        user_id=test_user.id,
+        output_mode="story",
+        input_type="keywords",
+        request_payload={
+            "output_mode": "story",
+            "type": "keywords",
+            "data": "小兔子",
+            "generate_images": False,
+        },
+    )
+
+    with patch(
+        "app.services.story_service.generate_story_content",
+        new_callable=AsyncMock,
+    ) as mock_generate_story_content:
+        mock_generate_story_content.return_value = invalid_output
+
+        with pytest.raises(Exception):
+            await run_generation_job_service(job.id, db_session)
+
+    refreshed_job = (
+        await db_session.execute(select(GenerationJob).where(GenerationJob.id == job.id))
+    ).scalar_one()
+    assert refreshed_job.status == "failed"
+    assert refreshed_job.story_id is None
+    assert refreshed_job.current_step == "generation_failed"
+    assert "quality checks" in refreshed_job.error_message
+
+    stories = (
+        await db_session.execute(select(Story).where(Story.user_id == test_user.id))
+    ).scalars().all()
+    assert stories == []
+
+    events = (
+        await db_session.execute(
+            select(GenerationJobEvent)
+            .where(GenerationJobEvent.job_id == job.id)
+            .order_by(GenerationJobEvent.id)
+        )
+    ).scalars().all()
+    assert [event.event_type for event in events] == [
+        "request_accepted",
+        "worker_started",
+        "context_prepared",
+        "quality_gate_failed",
+        "generation_failed",
+    ]
+    quality_event = events[3]
+    assert quality_event.event_metadata["step"] == "narrative_generation"
+    assert quality_event.event_metadata["issues"][0]["code"] == "missing_story_text"
+
+
 async def test_asset_retry_records_job_events_and_updates_retryable_assets(
     db_session,
     test_user,