Pure checks for Pricing

Verification Boundary

The suite checks deterministic module behavior and declared configuration using local inputs.

What This Suite Proves

Reservation obeys the declared ceiling. Credit and cent rounding serve different purposes. Unknown usage stays visible without guessed charges. Combined bindings require every named suite; a component assertion alone does not establish the full experiment.

What It Does Not Prove

These checks do not establish database transactions, deployed permissions, provider availability or a complete user journey.

Real Dependencies and Test Doubles

Published rate conversions and cost arithmetic are real. There is no model or database dependency and no rate double.

Must Not Be Doubled

Retain the function, configuration or boundary guard under test and its assertions; replacing them removes the evidence.