test_subtract_usage_both_present() — langchain Function Reference

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

Function python LangChainCore ApiManagement

Entity Profile

LangChainCore→ ApiManagement→ test_subtract_usage_both_present() — langchain Function Reference

Dependency Diagram

graph TD
  35f384a7_9fd7_1f87_7621_ff99415d4826["test_subtract_usage_both_present()"]
  f148f3ce_73bd_627d_a979_33d23ebac843["test_ai.py"]
  35f384a7_9fd7_1f87_7621_ff99415d4826 -->|defined in| f148f3ce_73bd_627d_a979_33d23ebac843
  style 35f384a7_9fd7_1f87_7621_ff99415d4826 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/messages/test_ai.py lines 157–161

def test_subtract_usage_both_present() -> None:
    usage1 = UsageMetadata(input_tokens=10, output_tokens=20, total_tokens=30)
    usage2 = UsageMetadata(input_tokens=5, output_tokens=10, total_tokens=15)
    result = subtract_usage(usage1, usage2)
    assert result == UsageMetadata(input_tokens=5, output_tokens=10, total_tokens=15)