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test_astream_response_format() — langchain Function Reference

Architecture documentation for the test_astream_response_format() function in test_base.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

Dependency Diagram

graph TD
  dc8f35dd_de27_93e2_71d1_dd80e0ddc1b5["test_astream_response_format()"]
  bd382a4e_442c_13ae_530c_6e34bc43623d["test_base.py"]
  dc8f35dd_de27_93e2_71d1_dd80e0ddc1b5 -->|defined in| bd382a4e_442c_13ae_530c_6e34bc43623d
  style dc8f35dd_de27_93e2_71d1_dd80e0ddc1b5 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/partners/openai/tests/integration_tests/chat_models/test_base.py lines 1042–1056

async def test_astream_response_format() -> None:
    full: BaseMessageChunk | None = None
    chunks = []
    async for chunk in ChatOpenAI(model="gpt-5-nano").astream(
        "how are ya", response_format=Foo
    ):
        chunks.append(chunk)
        full = chunk if full is None else full + chunk
    assert len(chunks) > 1
    assert isinstance(full, AIMessageChunk)
    parsed = full.additional_kwargs["parsed"]
    assert isinstance(parsed, Foo)
    assert isinstance(full.content, str)
    parsed_content = json.loads(full.content)
    assert parsed.response == parsed_content["response"]

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Defined In

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Frequently Asked Questions

What does test_astream_response_format() do?
test_astream_response_format() is a function in the langchain codebase, defined in libs/partners/openai/tests/integration_tests/chat_models/test_base.py.
Where is test_astream_response_format() defined?
test_astream_response_format() is defined in libs/partners/openai/tests/integration_tests/chat_models/test_base.py at line 1042.

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