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test_model_request_backwards_compat() — langchain Function Reference

Architecture documentation for the test_model_request_backwards_compat() function in test_middleware_backwards_compat.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

Dependency Diagram

graph TD
  431e2bf1_2123_a25d_bd37_b6182056a89d["test_model_request_backwards_compat()"]
  74d2d22f_07ae_c5bb_33c3_7da58e2da5a0["test_middleware_backwards_compat.py"]
  431e2bf1_2123_a25d_bd37_b6182056a89d -->|defined in| 74d2d22f_07ae_c5bb_33c3_7da58e2da5a0
  style 431e2bf1_2123_a25d_bd37_b6182056a89d fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py lines 268–275

def test_model_request_backwards_compat() -> None:
    """ModelRequest can be instantiated without type params."""
    # Old way - no type param
    request = ModelRequest(
        model=None,  # type: ignore[arg-type]
        messages=[HumanMessage(content="test")],
    )
    assert len(request.messages) == 1

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Defined In

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Frequently Asked Questions

What does test_model_request_backwards_compat() do?
test_model_request_backwards_compat() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py.
Where is test_model_request_backwards_compat() defined?
test_model_request_backwards_compat() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py at line 268.

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