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test_custom_model_string() — langchain Function Reference

Architecture documentation for the test_custom_model_string() function in test_tool_emulator.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

Dependency Diagram

graph TD
  0ef94459_a72c_5643_9fda_4a7f707cad94["test_custom_model_string()"]
  b7251e9a_e972_0104_74b3_75fbbecbaa7b["TestLLMToolEmulatorModelConfiguration"]
  0ef94459_a72c_5643_9fda_4a7f707cad94 -->|defined in| b7251e9a_e972_0104_74b3_75fbbecbaa7b
  style 0ef94459_a72c_5643_9fda_4a7f707cad94 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_tool_emulator.py lines 366–377

    def test_custom_model_string(self) -> None:
        """Test passing a model string for emulation."""
        # Just test that initialization works - don't require anthropic package
        try:
            emulator = LLMToolEmulator(
                tools=["get_weather"], model="anthropic:claude-sonnet-4-5-20250929"
            )
            assert emulator.model is not None
            assert "get_weather" in emulator.tools_to_emulate
        except ImportError:
            # If anthropic isn't installed, that's fine for this unit test
            pass

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does test_custom_model_string() do?
test_custom_model_string() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_tool_emulator.py.
Where is test_custom_model_string() defined?
test_custom_model_string() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_tool_emulator.py at line 366.

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