Test payment failures, retries, cancellations and order notifications as well as the successful checkout path.
One successful payment does not verify the whole order workflow. Users may close a page, a bank may reject a transaction or a connection may slow down. Tests should cover how orders behave in these situations.
Follow a successful transaction through
Confirm that the order appears in the management system with matching totals, products, address and status. Staff should be able to find the order number shown to the customer.
Test unsuccessful payments
Explain whether the customer can retry and whether an order exists. Do not expose card details or sensitive provider diagnostics in error messages. Use the provider's supported testing environment and methods.
Check repeated actions
Double-clicking submit or refreshing a confirmation screen should not create duplicate orders. Decide how the system handles a delayed payment notification in coordination with the platform and provider.
Include operational staff
Cancellation, stock restoration and customer communication involve the people processing orders. Rehearse with them, then remove test records and products. If a real payment is necessary, agree on the amount and refund process beforehand.