test_fetch_last_ai_and_tool_messages_only_human_messages() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/test_fetch_last_ai_and_tool_messages.py lines 82–92

def test_fetch_last_ai_and_tool_messages_only_human_messages() -> None:
    """Test handling when only HumanMessages exist."""
    messages = [
        HumanMessage(content="Hello"),
        HumanMessage(content="Are you there?"),
    ]

    ai_msg, tool_msgs = _fetch_last_ai_and_tool_messages(messages)

    assert ai_msg is None
    assert len(tool_msgs) == 0