test_structured_output_parsing_error_without_retry() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/test_response_format.py lines 497–528

    def test_structured_output_parsing_error_without_retry(self) -> None:
        """Test structured output parsing error without retry.

        Test that StructuredOutputValidationError is raised when tool args fail to parse
        without retry.
        """
        tool_calls = [
            [
                {
                    "name": "WeatherBaseModel",
                    "id": "1",
                    "args": {"invalid": "data"},
                },
            ],
        ]

        model = FakeToolCallingModel(tool_calls=tool_calls)

        agent = create_agent(
            model,
            [],
            response_format=ToolStrategy(
                WeatherBaseModel,
                handle_errors=False,
            ),
        )

        with pytest.raises(
            StructuredOutputValidationError,
            match=r".*WeatherBaseModel.*",
        ):
            agent.invoke({"messages": [HumanMessage("What's the weather?")]})