test__parse_arguments_from_tool_call_with_function_name_metadata() — langchain Function Reference

Source Code

libs/partners/ollama/tests/unit_tests/test_chat_models.py lines 74–105

def test__parse_arguments_from_tool_call_with_function_name_metadata() -> None:
    """Test that functionName metadata is filtered out from tool arguments.

    Some models may include metadata like `functionName` in the arguments
    that just echoes the function name. This should be filtered out for
    no-argument tools to return an empty dictionary.
    """
    raw_tool_call_with_metadata = {
        "function": {
            "name": "magic_function_no_args",
            "arguments": {"functionName": "magic_function_no_args"},
        }
    }
    response = _parse_arguments_from_tool_call(raw_tool_call_with_metadata)
    assert response == {}

    # Arguments contain both real args and metadata
    raw_tool_call_mixed = {
        "function": {
            "name": "some_function",
            "arguments": {"functionName": "some_function", "real_arg": "value"},
        }
    }
    response_mixed = _parse_arguments_from_tool_call(raw_tool_call_mixed)
    assert response_mixed == {"real_arg": "value"}

    # functionName has different value (should be preserved)
    raw_tool_call_different = {
        "function": {"name": "function_a", "arguments": {"functionName": "function_b"}}
    }
    response_different = _parse_arguments_from_tool_call(raw_tool_call_different)
    assert response_different == {"functionName": "function_b"}