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test__format_messages_trailing_whitespace() — langchain Function Reference

Architecture documentation for the test__format_messages_trailing_whitespace() function in test_chat_models.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

Dependency Diagram

graph TD
  b928ae05_a8f8_b52e_4f1f_8c2cb3b88876["test__format_messages_trailing_whitespace()"]
  18428dc5_a41b_90c6_88ad_615296ee3311["test_chat_models.py"]
  b928ae05_a8f8_b52e_4f1f_8c2cb3b88876 -->|defined in| 18428dc5_a41b_90c6_88ad_615296ee3311
  style b928ae05_a8f8_b52e_4f1f_8c2cb3b88876 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/partners/anthropic/tests/unit_tests/test_chat_models.py lines 2286–2303

def test__format_messages_trailing_whitespace() -> None:
    """Test that trailing whitespace is trimmed from the final assistant message."""
    human = HumanMessage("foo")  # type: ignore[misc]

    # Test string content
    ai_string = AIMessage("thought ")  # type: ignore[misc]
    _, anthropic_messages = _format_messages([human, ai_string])
    assert anthropic_messages[-1]["content"] == "thought"

    # Test list content
    ai_list = AIMessage([{"type": "text", "text": "thought "}])  # type: ignore[misc]
    _, anthropic_messages = _format_messages([human, ai_list])
    assert anthropic_messages[-1]["content"][0]["text"] == "thought"  # type: ignore[index]

    # Test that intermediate messages are NOT trimmed
    ai_intermediate = AIMessage("thought ")  # type: ignore[misc]
    _, anthropic_messages = _format_messages([human, ai_intermediate, human])
    assert anthropic_messages[1]["content"] == "thought "

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Frequently Asked Questions

What does test__format_messages_trailing_whitespace() do?
test__format_messages_trailing_whitespace() is a function in the langchain codebase, defined in libs/partners/anthropic/tests/unit_tests/test_chat_models.py.
Where is test__format_messages_trailing_whitespace() defined?
test__format_messages_trailing_whitespace() is defined in libs/partners/anthropic/tests/unit_tests/test_chat_models.py at line 2286.

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