FailingModel Class — langchain Architecture

Architecture documentation for the FailingModel class in test_wrap_model_call.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  60949250_9854_b9ff_5030_211968e166da["FailingModel"]
  48aa29b8_65e7_522f_a445_a441eeb6baff["BaseChatModel"]
  60949250_9854_b9ff_5030_211968e166da -->|extends| 48aa29b8_65e7_522f_a445_a441eeb6baff
  573473e5_eb93_a7d7_84ba_c975071c09af["test_wrap_model_call.py"]
  60949250_9854_b9ff_5030_211968e166da -->|defined in| 573473e5_eb93_a7d7_84ba_c975071c09af
  6b141939_3e96_ccea_c9ad_492a2ca500ed["_generate()"]
  60949250_9854_b9ff_5030_211968e166da -->|method| 6b141939_3e96_ccea_c9ad_492a2ca500ed
  0c6a77a0_b896_2b90_e50b_5498727d67ab["_llm_type()"]
  60949250_9854_b9ff_5030_211968e166da -->|method| 0c6a77a0_b896_2b90_e50b_5498727d67ab

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py lines 204–220

        class FailingModel(BaseChatModel):
            """Model that always fails."""

            @override
            def _generate(
                self,
                messages: list[BaseMessage],
                stop: list[str] | None = None,
                run_manager: CallbackManagerForLLMRun | None = None,
                **kwargs: Any,
            ) -> ChatResult:
                msg = "Model error"
                raise ValueError(msg)

            @property
            def _llm_type(self) -> str:
                return "failing"