test_subtract_usage_one_none() — langchain Function Reference

Architecture documentation for the test_subtract_usage_one_none() function in test_ai.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

LangChainCore→ MessageInterface→ test_subtract_usage_one_none() — langchain Function Reference

Dependency Diagram

graph TD
  80904b24_7d1a_73de_e664_1d6a7c3e8413["test_subtract_usage_one_none()"]
  f148f3ce_73bd_627d_a979_33d23ebac843["test_ai.py"]
  80904b24_7d1a_73de_e664_1d6a7c3e8413 -->|defined in| f148f3ce_73bd_627d_a979_33d23ebac843
  style 80904b24_7d1a_73de_e664_1d6a7c3e8413 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/messages/test_ai.py lines 151–154

def test_subtract_usage_one_none() -> None:
    usage = UsageMetadata(input_tokens=10, output_tokens=20, total_tokens=30)
    result = subtract_usage(usage, None)
    assert result == usage