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test_fetch_last_ai_and_tool_messages_empty_list() — langchain Function Reference

Architecture documentation for the test_fetch_last_ai_and_tool_messages_empty_list() function in test_fetch_last_ai_and_tool_messages.py from the langchain codebase.

Function python LangChainCore Runnables

Entity Profile

Dependency Diagram

graph TD
  17de3615_bf76_27dd_bc84_f653ec7f211a["test_fetch_last_ai_and_tool_messages_empty_list()"]
  377b132d_d3e1_0d37_8fdd_618ce0d34bb1["test_fetch_last_ai_and_tool_messages.py"]
  17de3615_bf76_27dd_bc84_f653ec7f211a -->|defined in| 377b132d_d3e1_0d37_8fdd_618ce0d34bb1
  style 17de3615_bf76_27dd_bc84_f653ec7f211a fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/langchain_v1/tests/unit_tests/agents/test_fetch_last_ai_and_tool_messages.py lines 68–79

def test_fetch_last_ai_and_tool_messages_empty_list() -> None:
    """Test handling of empty messages list.

    This can occur after RemoveMessage(id=REMOVE_ALL_MESSAGES) clears all messages.
    """
    messages: list = []

    ai_msg, tool_msgs = _fetch_last_ai_and_tool_messages(messages)

    # Should return None when no AIMessage is found
    assert ai_msg is None
    assert len(tool_msgs) == 0

Domain

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Defined In

Source

Frequently Asked Questions

What does test_fetch_last_ai_and_tool_messages_empty_list() do?
test_fetch_last_ai_and_tool_messages_empty_list() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/test_fetch_last_ai_and_tool_messages.py.
Where is test_fetch_last_ai_and_tool_messages_empty_list() defined?
test_fetch_last_ai_and_tool_messages_empty_list() is defined in libs/langchain_v1/tests/unit_tests/agents/test_fetch_last_ai_and_tool_messages.py at line 68.

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