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test_event_stream_with_simple_function_tool() — langchain Function Reference

Architecture documentation for the test_event_stream_with_simple_function_tool() function in test_runnable_events_v2.py from the langchain codebase.

Function python LangChainCore Runnables calls 1

Entity Profile

Dependency Diagram

graph TD
  97b265e9_1012_d5e6_2070_316d2916dd8c["test_event_stream_with_simple_function_tool()"]
  33c02978_2077_5819_7048_bc2a81e80625["test_runnable_events_v2.py"]
  97b265e9_1012_d5e6_2070_316d2916dd8c -->|defined in| 33c02978_2077_5819_7048_bc2a81e80625
  716d2a5e_dc8e_3cae_e044_b56b06bee655["_collect_events()"]
  97b265e9_1012_d5e6_2070_316d2916dd8c -->|calls| 716d2a5e_dc8e_3cae_e044_b56b06bee655
  style 97b265e9_1012_d5e6_2070_316d2916dd8c fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py lines 93–185

async def test_event_stream_with_simple_function_tool() -> None:
    """Test the event stream with a function and tool."""

    def foo(x: int) -> dict:
        """Foo."""
        _ = x
        return {"x": 5}

    @tool
    def get_docs(x: int) -> list[Document]:
        """Hello Doc."""
        _ = x
        return [Document(page_content="hello")]

    chain = RunnableLambda(foo) | get_docs
    events = await _collect_events(chain.astream_events({}, version="v2"))
    _assert_events_equal_allow_superset_metadata(
        events,
        [
            {
                "event": "on_chain_start",
                "run_id": "",
                "parent_ids": [],
                "name": "RunnableSequence",
                "tags": [],
                "metadata": {},
                "data": {"input": {}},
            },
            {
                "event": "on_chain_start",
                "name": "foo",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
                "metadata": {},
                "data": {},
            },
            {
                "event": "on_chain_stream",
                "name": "foo",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
                "metadata": {},
                "data": {"chunk": {"x": 5}},
            },
            {
                "event": "on_chain_end",
                "name": "foo",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
                "metadata": {},
                "data": {"input": {}, "output": {"x": 5}},
            },
            {
                "event": "on_tool_start",
                "name": "get_docs",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:2"],
                "metadata": {},
                "data": {"input": {"x": 5}},
            },
            {
                "event": "on_tool_end",
                "name": "get_docs",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:2"],
                "metadata": {},
                "data": {"input": {"x": 5}, "output": [Document(page_content="hello")]},
            },
            {
                "event": "on_chain_stream",
                "run_id": "",
                "parent_ids": [],
                "tags": [],
                "metadata": {},
                "name": "RunnableSequence",
                "data": {"chunk": [Document(page_content="hello")]},

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Defined In

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Source

Frequently Asked Questions

What does test_event_stream_with_simple_function_tool() do?
test_event_stream_with_simple_function_tool() is a function in the langchain codebase, defined in libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py.
Where is test_event_stream_with_simple_function_tool() defined?
test_event_stream_with_simple_function_tool() is defined in libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py at line 93.
What does test_event_stream_with_simple_function_tool() call?
test_event_stream_with_simple_function_tool() calls 1 function(s): _collect_events.

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