test_structured_tool_from_function() — langchain Function Reference

Architecture documentation for the test_structured_tool_from_function() function in test_tools.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 1

Entity Profile

LangChainCore→ MessageInterface→ test_structured_tool_from_function() — langchain Function Reference

Dependency Diagram

graph TD
  b1f79d5c_e805_1836_a4fd_1ed136b9e918["test_structured_tool_from_function()"]
  8e7836ae_e72c_f670_72a5_4ca6d46e3555["test_tools.py"]
  b1f79d5c_e805_1836_a4fd_1ed136b9e918 -->|defined in| 8e7836ae_e72c_f670_72a5_4ca6d46e3555
  b621c544_d6db_7e8d_7240_9ce08870d71a["foo()"]
  b1f79d5c_e805_1836_a4fd_1ed136b9e918 -->|calls| b621c544_d6db_7e8d_7240_9ce08870d71a
  style b1f79d5c_e805_1836_a4fd_1ed136b9e918 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/test_tools.py lines 848–879

def test_structured_tool_from_function() -> None:
    """Test that structured tools can be created from functions."""

    def foo(bar: int, baz: str) -> str:
        """Docstring thing.

        Args:
            bar: the bar value
            baz: the baz value
        """
        raise NotImplementedError

    structured_tool = StructuredTool.from_function(foo)
    assert structured_tool.name == "foo"
    assert structured_tool.args == {
        "bar": {"title": "Bar", "type": "integer"},
        "baz": {"title": "Baz", "type": "string"},
    }

    assert _schema(structured_tool.args_schema) == {
        "title": "foo",
        "type": "object",
        "description": inspect.getdoc(foo),
        "properties": {
            "bar": {"title": "Bar", "type": "integer"},
            "baz": {"title": "Baz", "type": "string"},
        },
        "required": ["bar", "baz"],
    }

    assert foo.__doc__ is not None
    assert structured_tool.description == textwrap.dedent(foo.__doc__.strip())