test_agent_tool_return_direct_in_intermediate_steps() — langchain Function Reference

Source Code

libs/langchain/tests/unit_tests/agents/test_agent_async.py lines 313–341

async def test_agent_tool_return_direct_in_intermediate_steps() -> None:
    """Test agent using tools that return directly."""
    tool = "Search"
    responses = [
        f"FooBarBaz\nAction: {tool}\nAction Input: misalignment",
        "Oh well\nFinal Answer: curses foiled again",
    ]
    fake_llm = FakeListLLM(responses=responses)
    tools = [
        Tool(
            name="Search",
            func=lambda x: x,
            description="Useful for searching",
            return_direct=True,
        ),
    ]
    agent = initialize_agent(
        tools,
        fake_llm,
        agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
        return_intermediate_steps=True,
    )

    resp = await agent.acall("when was langchain made")
    assert isinstance(resp, dict)
    assert resp["output"] == "misalignment"
    assert len(resp["intermediate_steps"]) == 1
    action, _action_intput = resp["intermediate_steps"][0]
    assert action.tool == "Search"