test: verify real kbqa workflow

backend/tests/integration/test_session_api.py

@@ -0,0 +1,38 @@
+from collections.abc import AsyncIterator
+
+from fastapi import FastAPI
+from httpx import ASGITransport, AsyncClient
+from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, async_sessionmaker
+
+from kbqa.api.errors import register_exception_handlers
+from kbqa.api.middleware import RequestIDMiddleware
+from kbqa.chat.routes import router
+from kbqa.database import get_session
+
+
+async def test_session_api_persists_and_deletes(sqlite_engine: AsyncEngine) -> None:
+    factory = async_sessionmaker(sqlite_engine, expire_on_commit=False)
+    app = FastAPI()
+    app.add_middleware(RequestIDMiddleware)
+    register_exception_handlers(app)
+    app.include_router(router, prefix="/api/v1")
+
+    async def session_override() -> AsyncIterator[AsyncSession]:
+        async with factory() as session:
+            yield session
+
+    app.dependency_overrides[get_session] = session_override
+    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
+        created = await client.post("/api/v1/sessions", json={"title": "持久化测试"})
+        assert created.status_code == 201
+        session_id = created.json()["id"]
+
+        listed = await client.get("/api/v1/sessions")
+        assert listed.json()["items"][0]["id"] == session_id
+        messages = await client.get(f"/api/v1/sessions/{session_id}/messages")
+        assert messages.json()["items"] == []
+
+        deleted = await client.delete(f"/api/v1/sessions/{session_id}")
+        assert deleted.status_code == 204
+        missing = await client.get(f"/api/v1/sessions/{session_id}/messages")
+        assert missing.status_code == 404

backend/tests/integration/test_sqlite_cascades.py

@@ -0,0 +1,56 @@
+from sqlalchemy import event, select
+from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+
+from kbqa.chat.models import ChatSession, Message
+from kbqa.database import Base
+from kbqa.documents.models import Document, IndexJob
+import kbqa.models  # noqa: F401
+
+
+async def test_sqlite_cascades_document_and_session(tmp_path) -> None:
+    engine = create_async_engine(f"sqlite+aiosqlite:///{tmp_path / 'test.db'}")
+
+    @event.listens_for(engine.sync_engine, "connect")
+    def enable_foreign_keys(connection, _record) -> None:
+        connection.execute("PRAGMA foreign_keys=ON")
+
+    async with engine.begin() as connection:
+        await connection.run_sync(Base.metadata.create_all)
+    factory = async_sessionmaker(engine, expire_on_commit=False)
+    async with factory() as session:
+        document = Document(
+            id="doc",
+            filename="a.txt",
+            stored_path="a",
+            file_type="txt",
+            mime_type="text/plain",
+            file_size=1,
+            sha256="0" * 64,
+            status="pending",
+            chunk_count=0,
+        )
+        session.add_all(
+            [
+                document,
+                IndexJob(id="job", document_id="doc", status="queued", attempt_count=0),
+                ChatSession(id="session"),
+            ]
+        )
+        await session.commit()
+        session.add(
+            Message(
+                id="message",
+                session_id="session",
+                role="user",
+                content="q",
+                status="completed",
+                order_index=0,
+            )
+        )
+        await session.commit()
+        await session.delete(document)
+        await session.delete(await session.get(ChatSession, "session"))
+        await session.commit()
+        assert await session.scalar(select(IndexJob).where(IndexJob.id == "job")) is None
+        assert await session.scalar(select(Message).where(Message.id == "message")) is None
+    await engine.dispose()