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test_handler_called_with_modified_request_async() — langchain Function Reference

Architecture documentation for the test_handler_called_with_modified_request_async() function in test_todo.py from the langchain codebase.

Function python LangChainCore ApiManagement calls 1

Entity Profile

Dependency Diagram

graph TD
  fe1b7154_2c82_b662_a5be_821e7bbae90b["test_handler_called_with_modified_request_async()"]
  d2f3bc2a_72aa_59d0_8558_330793eda010["test_todo.py"]
  fe1b7154_2c82_b662_a5be_821e7bbae90b -->|defined in| d2f3bc2a_72aa_59d0_8558_330793eda010
  985809c4_2504_4ccb_3f22_07707d600f19["_make_request()"]
  fe1b7154_2c82_b662_a5be_821e7bbae90b -->|calls| 985809c4_2504_4ccb_3f22_07707d600f19
  style fe1b7154_2c82_b662_a5be_821e7bbae90b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_todo.py lines 790–807

async def test_handler_called_with_modified_request_async() -> None:
    """Test async version - handler receives the modified request."""
    middleware = TodoListMiddleware()
    request = _make_request(system_prompt="Original")
    handler_called: dict[str, bool] = {"value": False}
    received_prompt: dict[str, str | None] = {"value": None}

    async def mock_handler(req: ModelRequest) -> ModelResponse:
        handler_called["value"] = True
        received_prompt["value"] = req.system_prompt
        return ModelResponse(result=[AIMessage(content="response")])

    await middleware.awrap_model_call(request, mock_handler)

    assert handler_called["value"]
    assert received_prompt["value"] is not None
    assert "Original" in received_prompt["value"]
    assert "write_todos" in received_prompt["value"]

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Defined In

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Source

Frequently Asked Questions

What does test_handler_called_with_modified_request_async() do?
test_handler_called_with_modified_request_async() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_todo.py.
Where is test_handler_called_with_modified_request_async() defined?
test_handler_called_with_modified_request_async() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_todo.py at line 790.
What does test_handler_called_with_modified_request_async() call?
test_handler_called_with_modified_request_async() calls 1 function(s): _make_request.

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