test_tracer_nested_run() — langchain Function Reference

Architecture documentation for the test_tracer_nested_run() function in test_async_base_tracer.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ test_tracer_nested_run() — langchain Function Reference

Dependency Diagram

graph TD
  e1e6d912_e6e7_c364_6d78_56003a6ca9c8["test_tracer_nested_run()"]
  a49e8dc2_b2f8_294c_51a9_1a3ea21182fb["test_async_base_tracer.py"]
  e1e6d912_e6e7_c364_6d78_56003a6ca9c8 -->|defined in| a49e8dc2_b2f8_294c_51a9_1a3ea21182fb
  style e1e6d912_e6e7_c364_6d78_56003a6ca9c8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/tracers/test_async_base_tracer.py lines 218–333

async def test_tracer_nested_run() -> None:
    """Test tracer on a nested run."""
    tracer = FakeAsyncTracer()

    chain_uuid = uuid4()
    tool_uuid = uuid4()
    llm_uuid1 = uuid4()
    llm_uuid2 = uuid4()
    for _ in range(10):
        await tracer.on_chain_start(
            serialized={"name": "chain"}, inputs={}, run_id=chain_uuid
        )
        await tracer.on_tool_start(
            serialized={"name": "tool"},
            input_str="test",
            run_id=tool_uuid,
            parent_run_id=chain_uuid,
        )
        await tracer.on_llm_start(
            serialized=SERIALIZED,
            prompts=[],
            run_id=llm_uuid1,
            parent_run_id=tool_uuid,
        )
        await tracer.on_llm_end(response=LLMResult(generations=[[]]), run_id=llm_uuid1)
        await tracer.on_tool_end("test", run_id=tool_uuid)
        await tracer.on_llm_start(
            serialized=SERIALIZED,
            prompts=[],
            run_id=llm_uuid2,
            parent_run_id=chain_uuid,
        )
        await tracer.on_llm_end(response=LLMResult(generations=[[]]), run_id=llm_uuid2)
        await tracer.on_chain_end(outputs={}, run_id=chain_uuid)

    compare_run = Run(
        id=str(chain_uuid),
        name="chain",
        error=None,
        start_time=datetime.now(timezone.utc),
        end_time=datetime.now(timezone.utc),
        events=[
            {"name": "start", "time": datetime.now(timezone.utc)},
            {"name": "end", "time": datetime.now(timezone.utc)},
        ],
        extra={},
        serialized={"name": "chain"},
        inputs={},
        outputs={},
        run_type="chain",
        trace_id=chain_uuid,
        dotted_order=f"20230101T000000000000Z{chain_uuid}",
        child_runs=[
            Run(
                id=tool_uuid,
                name="tool",
                parent_run_id=chain_uuid,
                start_time=datetime.now(timezone.utc),
                end_time=datetime.now(timezone.utc),
                events=[
                    {"name": "start", "time": datetime.now(timezone.utc)},
                    {"name": "end", "time": datetime.now(timezone.utc)},
                ],
                extra={},
                serialized={"name": "tool"},
                inputs={"input": "test"},
                outputs={"output": "test"},
                error=None,
                run_type="tool",
                trace_id=chain_uuid,
                dotted_order=f"20230101T000000000000Z{chain_uuid}.20230101T000000000000Z{tool_uuid}",
                child_runs=[
                    Run(
                        id=str(llm_uuid1),
                        name="llm",
                        parent_run_id=str(tool_uuid),
                        error=None,
                        start_time=datetime.now(timezone.utc),
                        end_time=datetime.now(timezone.utc),
                        events=[
                            {"name": "start", "time": datetime.now(timezone.utc)},