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test_reasoning_stream() — langchain Function Reference

Architecture documentation for the test_reasoning_stream() function in test_chat_models_reasoning.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

Dependency Diagram

graph TD
  e5edbc0c_d53f_853e_4779_369dbe63de12["test_reasoning_stream()"]
  5a5c2d7b_4823_4697_a3e1_c5e1c3fce238["test_chat_models_reasoning.py"]
  e5edbc0c_d53f_853e_4779_369dbe63de12 -->|defined in| 5a5c2d7b_4823_4697_a3e1_c5e1c3fce238
  style e5edbc0c_d53f_853e_4779_369dbe63de12 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/partners/ollama/tests/integration_tests/chat_models/test_chat_models_reasoning.py lines 80–119

async def test_reasoning_stream(model: str, use_async: bool) -> None:
    """Test streaming with `reasoning=True`."""
    llm = ChatOllama(model=model, num_ctx=2**12, reasoning=True)
    messages = [
        {
            "role": "user",
            "content": SAMPLE,
        }
    ]
    result = None
    if use_async:
        async for chunk in llm.astream(messages):
            assert isinstance(chunk, BaseMessageChunk)
            if result is None:
                result = chunk
                continue
            result += chunk
    else:
        for chunk in llm.stream(messages):
            assert isinstance(chunk, BaseMessageChunk)
            if result is None:
                result = chunk
                continue
            result += chunk
    assert isinstance(result, AIMessageChunk)
    assert result.content
    assert "reasoning_content" in result.additional_kwargs
    assert len(result.additional_kwargs["reasoning_content"]) > 0
    assert "<think>" not in result.content
    assert "</think>" not in result.content
    assert "<think>" not in result.additional_kwargs["reasoning_content"]
    assert "</think>" not in result.additional_kwargs["reasoning_content"]

    content_blocks = result.content_blocks
    assert content_blocks is not None
    assert len(content_blocks) > 0
    reasoning_blocks = [
        block for block in content_blocks if block.get("type") == "reasoning"
    ]
    assert len(reasoning_blocks) > 0

Domain

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Defined In

Source

Frequently Asked Questions

What does test_reasoning_stream() do?
test_reasoning_stream() is a function in the langchain codebase, defined in libs/partners/ollama/tests/integration_tests/chat_models/test_chat_models_reasoning.py.
Where is test_reasoning_stream() defined?
test_reasoning_stream() is defined in libs/partners/ollama/tests/integration_tests/chat_models/test_chat_models_reasoning.py at line 80.

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