test_human_in_the_loop_middleware_unknown_response_type() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_human_in_the_loop.py lines 295–322

def test_human_in_the_loop_middleware_unknown_response_type() -> None:
    """Test HumanInTheLoopMiddleware with unknown response type."""
    middleware = HumanInTheLoopMiddleware(
        interrupt_on={"test_tool": {"allowed_decisions": ["approve", "edit", "reject"]}}
    )

    ai_message = AIMessage(
        content="I'll help you",
        tool_calls=[{"name": "test_tool", "args": {"input": "test"}, "id": "1"}],
    )
    state = AgentState[Any](messages=[HumanMessage(content="Hello"), ai_message])

    def mock_unknown(_: Any) -> dict[str, Any]:
        return {"decisions": [{"type": "unknown"}]}

    with (
        patch("langchain.agents.middleware.human_in_the_loop.interrupt", side_effect=mock_unknown),
        pytest.raises(
            ValueError,
            match=re.escape(
                "Unexpected human decision: {'type': 'unknown'}. "
                "Decision type 'unknown' is not allowed for tool 'test_tool'. "
                "Expected one of ['approve', 'edit', 'reject'] based on the tool's "
                "configuration."
            ),
        ),
    ):
        middleware.after_model(state, Runtime())