test_context_overflow_error_backwards_compatibility() — langchain Function Reference

Source Code

libs/partners/anthropic/tests/unit_tests/test_chat_models.py lines 2377–2390

def test_context_overflow_error_backwards_compatibility() -> None:
    """Test that ContextOverflowError can be caught as BadRequestError."""
    llm = ChatAnthropic(model=MODEL_NAME)

    with (  # noqa: PT012
        patch.object(llm._client.messages, "create") as mock_create,
        pytest.raises(anthropic.BadRequestError) as exc_info,
    ):
        mock_create.side_effect = _CONTEXT_OVERFLOW_BAD_REQUEST_ERROR
        llm.invoke([HumanMessage(content="test")])

    # Verify it's both types (multiple inheritance)
    assert isinstance(exc_info.value, anthropic.BadRequestError)
    assert isinstance(exc_info.value, ContextOverflowError)