Compliance Testing
PCI-DSS (Payment Card Industry Data Security Standard) applies to any organization that processes, stores, or transmits cardholder data. Non-compliance can result in losing the ability to accept card payments—a business-ending consequence for most companies. PCI-DSS compliance requires both technical controls and periodic assessments. This guide
Testing
Stripe webhooks are the backbone of payment processing — they notify your application when payments succeed, subscriptions change, and invoices are due.
Testing
Payment fraud takes many forms — card testing attacks, negative amount injection, currency confusion, duplicate charge races, and webhook replay.
Testing
Payment flows are among the most critical user journeys in any application.
Testing
Payment provider SDKs make real HTTP calls that cost money, have rate limits, and behave differently in different environments.
Testing
Subscription billing is complex. A user upgrades mid-cycle, downgrades at renewal, reactivates after cancellation, or disputes a charge — each scenario has specific proration rules, invoice behaviors, and state transitions. Without systematic testing, billing bugs are guaranteed. This guide covers testing subscription lifecycle scenarios: plan changes, proration, trial periods, invoice
Testing
Testing rate limiting requires verifying your application respects API limits, implements correct backoff, handles Retry-After headers, and doesn't cascade failures when throttled. This guide covers unit testing retry logic, integration testing rate limits, and load testing throttle behavior. Why Rate Limiting Testing Matters Almost every external API
Testing
End-to-end checkout testing with Playwright covers the critical path from cart to order confirmation, including payment form interactions, address validation, edge cases like session expiry, and cross-browser compatibility for payment iframes. Why Checkout Needs Dedicated E2E Tests Checkout is the most valuable flow in any e-commerce
Testing
Testing Shopify apps requires dealing with embedded iframes, App Bridge authentication, and the Shopify CLI development environment. This guide covers mocking App Bridge for unit tests, integration testing with the development store, and testing checkout extensions. Shopify App Testing Challenges Shopify apps run in a unique environment that makes testing
Testing
Stripe provides a rich test environment with special test card numbers, a CLI for webhook simulation, and a test mode API. This guide covers unit testing with mocks, integration testing against the Stripe API, and webhook testing with the Stripe CLI. Stripe Testing Overview Stripe's testing infrastructure is
Testing
A robust e-commerce testing strategy layers unit tests for business logic, integration tests for payment and inventory APIs, and end-to-end tests for critical user journeys like checkout. This guide walks through the test pyramid applied to online stores. Why E-commerce Testing Is Different E-commerce applications