A fashion e-commerce client was running manual regression on every release — checkout, cart, discount codes, payment methods. The whole buying journey. It took the better part of a day, every release. And the highest-risk area — discount and cart logic — was exactly the fiddly thing tired testers were spot-checking. We built the regression suite in Java with Selenium and RestAssured. Nine weeks later, the team shipped weekly without thinking about QA.
An online fashion store with the usual surface: product catalog, size and variant selection, shopping cart, guest and logged-in checkout, several payment methods, discount and promo codes, user accounts with order history. Before every release, a tester had to walk every critical path by hand: browse, search, add to cart, update cart, apply a discount, check out as guest, check out logged in, try each payment method, confirm the order, check the confirmation email. Doing it properly took most of a day.
The discount and promo logic was the worst. Stacked codes, expired codes that still applied, promo prices that didn't match cart subtotals — the kind of fiddly bugs nobody noticed until the finance reconciliation at month-end showed a revenue gap.
Every bug in the cart-to-confirmation path is a potential abandoned sale. A customer who hits a broken discount code, a checkout that errors on a particular payment method, a cart that loses items on update — none of these generate a support ticket. They generate a silent lost order. And in e-commerce, the bugs that cost the most are the ones that look fine until you check the daily revenue.
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