Eric Wang
5020903791
- src/agent/state.py: minimal five-field AgentState - src/agent/graph.py: START -> normalize_input -> reply -> END, compiled with InMemorySaver; reply emits <state>1002</state> prefix - examples/langgraph_smoke.py: offline smoke, turns 1/2/1 verified - test/agent/test_scaffold.py: turn accumulation, thread isolation, fixed-template assertions (3 passed) - requirements.txt: pin langgraph==1.2.9 Known limit: InMemorySaver state disappears on process exit.
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
"""作业 1 验收测试：LangGraph 最小图。
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通过标准（对应迁移计划作业 1）：
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- 同一会话（thread）轮数累计：1 → 2；
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- 不同会话相互隔离：新 thread 的轮数从 1 开始；
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- 不依赖 FastGPT 与真实模型，离线可重复执行。
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注意：节点实现（src/agent/graph.py 中的 TODO）完成前，
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本文件的测试会失败，属于预期状态。
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"""
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import pytest
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from src.agent.graph import build_graph
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async def ask(graph, thread_id: str, text: str) -> dict:
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# 只传本轮变化的字段；对已有 checkpoint 的 thread 传完整初始状态，
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# 其中的 turn_count=0 会覆盖已累计的值（LangGraph 输入按通道覆盖）。
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return await graph.ainvoke(
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{"session_id": thread_id, "input_text": text},
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config={"configurable": {"thread_id": thread_id}},
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)
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@pytest.mark.asyncio
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async def test_same_thread_accumulates_turns() -> None:
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graph = build_graph()
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first = await ask(graph, "thread-a", "你好")
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second = await ask(graph, "thread-a", "发生了交通事故")
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assert first["turn_count"] == 1
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assert second["turn_count"] == 2
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@pytest.mark.asyncio
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async def test_different_threads_are_isolated() -> None:
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graph = build_graph()
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await ask(graph, "thread-a", "你好")
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await ask(graph, "thread-a", "发生了交通事故")
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other = await ask(graph, "thread-b", "你好")
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assert other["turn_count"] == 1
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@pytest.mark.asyncio
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async def test_reply_uses_fixed_template_with_stage_prefix() -> None:
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graph = build_graph()
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result = await ask(graph, "thread-a", "你好")
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assert result["stage_code"] == "1002"
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assert result["response_text"].startswith("<state>1002</state>")
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assert "你好" in result["response_text"]
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