test_chat_message_partial_composition() — langchain Function Reference

Architecture documentation for the test_chat_message_partial_composition() function in test_chat.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ test_chat_message_partial_composition() — langchain Function Reference

Dependency Diagram

graph TD
  e049fdd1_3fa9_5dd8_60c0_a6e1db43de18["test_chat_message_partial_composition()"]
  00c8bbe0_a31c_1ac8_487a_bfd5a9d6b117["test_chat.py"]
  e049fdd1_3fa9_5dd8_60c0_a6e1db43de18 -->|defined in| 00c8bbe0_a31c_1ac8_487a_bfd5a9d6b117
  style e049fdd1_3fa9_5dd8_60c0_a6e1db43de18 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/prompts/test_chat.py lines 838–852

def test_chat_message_partial_composition() -> None:
    """Test composition of partially initialized messages."""
    prompt = ChatPromptTemplate.from_messages([("system", "Prompt {x} {y}")]).partial(
        x="1"
    )

    appendix = ChatPromptTemplate.from_messages([("system", "Appendix {z}")])

    res = (prompt + appendix).format_messages(y="2", z="3")
    expected = [
        SystemMessage(content="Prompt 1 2"),
        SystemMessage(content="Appendix 3"),
    ]

    assert res == expected