Payments

Testing

Payment Gateway Testing: How to Test Checkout Flows End-to-End

The checkout flow is the most important page on your website. It's where visitors become customers, where revenue is realized or lost. It's also one of the most complex pieces of software to test correctly—involving frontend form validation, backend API calls, third-party payment gateway

Testing

Testing Stripe Payment Integration: Webhooks, Idempotency, and Error Scenarios

Stripe provides a test mode with real API behavior, test card numbers for different scenarios, and a CLI for webhook testing. Testing a payment integration requires covering happy-path charges, declined cards, 3D Secure flows, webhook receipt and idempotency, refunds, and subscription lifecycle events. This guide covers all of them.