BadMiddleware Class — langchain Architecture

Architecture documentation for the BadMiddleware class in test_tools.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  e2396b18_3b8a_5ec1_2a0a_c7793ff13508["BadMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  e2396b18_3b8a_5ec1_2a0a_c7793ff13508 -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  5e05f5a6_3c9a_6b02_08a5_596bf1a6469a["test_tools.py"]
  e2396b18_3b8a_5ec1_2a0a_c7793ff13508 -->|defined in| 5e05f5a6_3c9a_6b02_08a5_596bf1a6469a
  598545b6_e28e_55ac_c0b5_c44ec1657cf7["wrap_model_call()"]
  e2396b18_3b8a_5ec1_2a0a_c7793ff13508 -->|method| 598545b6_e28e_55ac_c0b5_c44ec1657cf7

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_tools.py lines 139–146

    class BadMiddleware(AgentMiddleware):
        def wrap_model_call(
            self,
            request: ModelRequest,
            handler: Callable[[ModelRequest], ModelResponse],
        ) -> ModelCallResult:
            # Add an unknown tool
            return handler(request.override(tools=[*request.tools, unknown_tool]))