Checkout total calculation
- src/checkout.js changes how valid and expired promo codes update the displayed total.
PS-01 / local run
Mission mission-checkout-promo
2026-07-13T12:00:00.000Z
Preflight Scout / release QA report
PRE-FLIGHT REPORT
Risk HIGH
Do not ship yet
Illustrative fixture only — no live model or browser run. This example checks whether promo-code feedback changes the checkout total.
Release result
Needs attention before production. 1 browser check failed; 0 were blocked.
- Review the failed or blocked mission evidence.
- Fix the issue or provide the missing credentials, permissions, approval, or safe test data.
- Rerun Preflight Scout before production.
Affected areas2
Manual checks4
Edge cases3
Suggested browser checks2
Executed browser checks2
Browser outcomes1 passed, 1 failed, 0 blocked
Browser results
Valid promo updates the total
Why this mattered
- The pricing branch changed and directly affects the amount shown to the buyer.
PASSEDturn-1 Opened the checkout at the synthetic local target.
PASSEDturn-2 SAVE10 reduced the displayed total from $100.00 to $90.00.
Expired promo preserves the total
Why this mattered
- The new expired-code branch must not apply a discount.
PASSEDturn-1 Opened the checkout at the synthetic local target.
FAILEDturn-2 Expired-code feedback was visible, but the total changed to $90.00; expected $100.00.
Manual checks before production
- Apply SAVE10 and confirm the total changes from $100.00 to $90.00.
- Apply EXPIRED10 and confirm the error is visible while the total remains $100.00.
- Apply an unknown code and confirm no stale success or error state remains.
- Confirm no payment or order submission occurs during promo validation.
Affected areas by risk
- HIGHCheckout total calculation (billing)
- MEDIUMExpired promo feedback (component)
Changed areas
Expired promo feedback
- index.html adds an alert element and src/checkout.js controls its visibility.
Affected Routes
/(page) fromindex.html
Edge cases to check
- Apply a valid code after an expired code.
- Apply the same code twice.
- Submit whitespace and mixed-case promo values.