test_tool_retry_deprecated_raise_behavior() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_tool_retry.py lines 942–971

def test_tool_retry_deprecated_raise_behavior() -> None:
    """Test ToolRetryMiddleware with deprecated 'raise' forwards to 'error' behavior."""
    model = FakeToolCallingModel(
        tool_calls=[
            [ToolCall(name="failing_tool", args={"value": "test"}, id="1")],
            [],
        ]
    )

    with pytest.warns(DeprecationWarning, match="on_failure='raise' is deprecated"):
        retry = ToolRetryMiddleware(
            max_retries=2,
            initial_delay=0.01,
            jitter=False,
            on_failure="raise",  # type: ignore[arg-type]
        )

    agent = create_agent(
        model=model,
        tools=[failing_tool],
        middleware=[retry],
        checkpointer=InMemorySaver(),
    )

    # Should raise the ValueError from the tool (same as 'error')
    with pytest.raises(ValueError, match="Failed: test"):
        agent.invoke(
            {"messages": [HumanMessage("Use failing tool")]},
            {"configurable": {"thread_id": "test"}},
        )