Testing
Payment flows are among the most critical user journeys in any application. A broken checkout means lost revenue; a broken refund flow means customer support calls. End-to-end payment testing validates the complete flow from clicking "Buy" through webhook processing and database updates. This guide covers E2E
Testing
Playwright has first-class support for Electron application testing since v1.9. Unlike Spectron (deprecated) or older Electron testing approaches, Playwright connects to Electron directly — giving you access to both the renderer process (web content) and the main process (Node.js environment) in a single test. This guide covers Electron
Testing
Nuxt 3's server-side rendering, file-based routing, and auto-imports make it a powerful framework — and each of those features introduces testing considerations that plain Vue apps don't have. Playwright is the right tool for Nuxt 3 end-to-end testing: it handles SSR-rendered
Test Automation
TanStack Router SPAs use client-side navigation — no full page reloads, history managed by the router, search params validated by Zod. Playwright handles all of this well, but you need to account for how the SPA manages state and URL. This guide covers Playwright E2E testing for TanStack Router: client-
Testing
WebRTC applications are notoriously hard to test because they involve browser APIs, network negotiation, and real-time media. This guide covers mocking RTCPeerConnection in Jest, intercepting WebRTC in Playwright, measuring media quality with getStats(), and simulating adverse network conditions. WebRTC powers video calls, screen sharing, and peer-to-peer data
Testing
WebXR applications are notoriously hard to test because they require browser APIs that only activate with real hardware. This guide shows how to use Playwright's WebXR emulation to test immersive sessions, controller input, hit testing, and XRSession lifecycle — all in CI without a headset. WebXR brings immersive experiences
Internationalization
Unit tests verify that translation keys are correct; end-to-end tests verify that the application actually delivers the right experience when a real user visits with a specific locale. Playwright's projects configuration makes multi-locale E2E testing practical—you define locale-specific configurations once and the entire
Testing Tools
Cypress and Playwright are the two dominant end-to-end testing frameworks for web applications. Both have mature ecosystems, strong communities, and handle the most common browser testing scenarios. They're also architecturally very different, which leads to real trade-offs for specific use cases. Architecture Differences Cypress runs
Testing
Electron applications present a unique testing challenge: they're web apps running in a desktop shell, combining Chromium's rendering engine with Node.js. Playwright, Microsoft's browser automation library, has native Electron support that lets you drive Electron apps the same way you'd drive
Testing
Playwright tests verify what the user sees. OpenTelemetry traces verify what the backend did to produce it. Together, they give you the most complete picture of correctness available: from browser click to database write. The Architecture Playwright test → browser action (click, form fill) → HTTP request to your API → [service A
E2E Testing
Both TestCafe and Playwright eliminate the WebDriver bottleneck. TestCafe uses a proxy-injection model; Playwright uses a custom browser protocol built into Chromium, Firefox, and WebKit. Both are fast, modern, and actively maintained. The differences are in the details — API design, parallelism model, multi-language support, and ecosystem maturity. Architecture
Testing
Percy is a visual testing platform from BrowserStack that integrates directly with Cypress and Playwright. You add a single command to your tests; Percy captures screenshots, compares them against approved baselines, and flags visual differences in a pull request review workflow. This tutorial covers setup for both Cypress and Playwright,