test_no_edit_when_below_trigger() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_context_editing.py lines 85–114

def test_no_edit_when_below_trigger() -> None:
    tool_call_id = "call-1"
    ai_message = AIMessage(
        content="",
        tool_calls=[{"id": tool_call_id, "name": "search", "args": {}}],
    )
    tool_message = ToolMessage(content="12345", tool_call_id=tool_call_id)

    _state, request = _make_state_and_request([ai_message, tool_message])
    middleware = ContextEditingMiddleware(
        edits=[ClearToolUsesEdit(trigger=50)],
    )

    modified_request = None

    def mock_handler(req: ModelRequest) -> ModelResponse:
        nonlocal modified_request
        modified_request = req
        return ModelResponse(result=[AIMessage(content="mock response")])

    # Call wrap_model_call which creates a new request
    middleware.wrap_model_call(request, mock_handler)

    # The modified request passed to handler should be the same since no edits applied
    assert modified_request is not None
    assert modified_request.messages[0].content == ""
    assert modified_request.messages[1].content == "12345"
    # Original request should be unchanged
    assert request.messages[0].content == ""
    assert request.messages[1].content == "12345"