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test_override_system_prompt_to_none() — langchain Function Reference

Architecture documentation for the test_override_system_prompt_to_none() function in test_system_message.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

Dependency Diagram

graph TD
  f5c844c2_ada8_3558_5008_f8bde32f259a["test_override_system_prompt_to_none()"]
  fdcac224_4658_3042_d41f_938e751993a3["TestModelRequestSystemMessage"]
  f5c844c2_ada8_3558_5008_f8bde32f259a -->|defined in| fdcac224_4658_3042_d41f_938e751993a3
  style f5c844c2_ada8_3558_5008_f8bde32f259a fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/langchain_v1/tests/unit_tests/agents/test_system_message.py lines 154–173

    def test_override_system_prompt_to_none(self) -> None:
        """Test override() setting system_prompt to None."""
        model = GenericFakeChatModel(messages=iter([AIMessage(content="Hello")]))

        original_request = ModelRequest(
            model=model,
            system_message=SystemMessage(content="Original"),
            messages=[],
            tool_choice=None,
            tools=[],
            response_format=None,
            state=AgentState(messages=[]),
            runtime=None,
        )

        # system_prompt is deprecated but supported at runtime for backward compatibility
        new_request = original_request.override(system_prompt=None)  # type: ignore[call-arg]

        assert new_request.system_message is None
        assert new_request.system_prompt is None

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Source

Frequently Asked Questions

What does test_override_system_prompt_to_none() do?
test_override_system_prompt_to_none() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/test_system_message.py.
Where is test_override_system_prompt_to_none() defined?
test_override_system_prompt_to_none() is defined in libs/langchain_v1/tests/unit_tests/agents/test_system_message.py at line 154.

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