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test_hook_config_decorator_on_class_method() — langchain Function Reference

Architecture documentation for the test_hook_config_decorator_on_class_method() function in test_decorators.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 2

Entity Profile

Dependency Diagram

graph TD
  a07be0fe_4b9e_17f0_8a15_c277b29b23dc["test_hook_config_decorator_on_class_method()"]
  85a104a3_11cf_6539_d0c0_ba69a17a41d4["test_decorators.py"]
  a07be0fe_4b9e_17f0_8a15_c277b29b23dc -->|defined in| 85a104a3_11cf_6539_d0c0_ba69a17a41d4
  5db83528_8e08_d7fe_e2fc_f806b038e621["after_model()"]
  a07be0fe_4b9e_17f0_8a15_c277b29b23dc -->|calls| 5db83528_8e08_d7fe_e2fc_f806b038e621
  68028dcd_ea5b_7d3a_0d75_c9ebd1cef92b["before_model()"]
  a07be0fe_4b9e_17f0_8a15_c277b29b23dc -->|calls| 68028dcd_ea5b_7d3a_0d75_c9ebd1cef92b
  style a07be0fe_4b9e_17f0_8a15_c277b29b23dc fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_decorators.py lines 189–209

def test_hook_config_decorator_on_class_method() -> None:
    """Test hook_config decorator on AgentMiddleware class methods."""

    class JumpMiddleware(AgentMiddleware):
        @hook_config(can_jump_to=["end", "model"])
        def before_model(
            self, state: AgentState[Any], runtime: Runtime[None]
        ) -> dict[str, Any] | None:
            if len(state["messages"]) > 5:
                return {"jump_to": "end"}
            return None

        @hook_config(can_jump_to=["tools"])
        def after_model(
            self, state: AgentState[Any], runtime: Runtime[None]
        ) -> dict[str, Any] | None:
            return {"jump_to": "tools"}

    # Verify can_jump_to metadata is preserved
    assert getattr(JumpMiddleware.before_model, "__can_jump_to__", []) == ["end", "model"]
    assert getattr(JumpMiddleware.after_model, "__can_jump_to__", []) == ["tools"]

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Frequently Asked Questions

What does test_hook_config_decorator_on_class_method() do?
test_hook_config_decorator_on_class_method() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_decorators.py.
Where is test_hook_config_decorator_on_class_method() defined?
test_hook_config_decorator_on_class_method() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_decorators.py at line 189.
What does test_hook_config_decorator_on_class_method() call?
test_hook_config_decorator_on_class_method() calls 2 function(s): after_model, before_model.

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