In-depth tutorials and comparisons for testing tools and frameworks — Playwright, Cypress, Selenium, Robot Framework, and more.
Test Automation
XPath is a query language for selecting nodes in an XML/HTML document. In Selenium, it's used to locate elements that CSS selectors can't easily target — parent elements, elements by text content, or elements based on sibling conditions. This guide covers XPath syntax, practical patterns, and
Test Automation
Puppeteer is Google's official Node.js library for automating headless Chrome. It's widely used for screenshots, PDFs, web scraping, and end-to-end testing. This guide covers installation, core APIs, common patterns, and where Puppeteer fits in the modern browser automation landscape. Key Takeaways Puppeteer drives headless Chrome
Test Automation
Selenium has three waiting strategies: implicit waits (global timeout applied to all element lookups), explicit waits (wait for a specific condition using WebDriverWait), and fluent waits (explicit wait with custom polling). Always use explicit waits. Never use time.sleep(). Implicit waits cause slow, unpredictable tests when mixed with explicit waits.
Test Automation
Puppeteer is a Node.js library, but Python developers can use Pyppeteer — an unofficial Python port. This guide covers installation, common automation tasks, and the gotchas you'll hit with Pyppeteer. If you need production-grade browser automation in Python, Playwright is the better-maintained choice. Key Takeaways Pyppeteer is Puppeteer
Test Automation
Python web scraping uses libraries like BeautifulSoup for static HTML and Selenium or Playwright for JavaScript-heavy sites. This tutorial covers both approaches with working code examples — then explains why modern AI testing tools can handle scraping automatically without writing selector code that breaks every time a site updates. Key Takeaways
Test Automation
Headless Chrome runs the Chrome browser without a visible UI. It's the default mode for browser automation in CI/CD pipelines because it's faster, uses less memory, and works on servers with no display. This guide covers how to run headless Chrome with Playwright, Puppeteer, and
Test Automation
Playwright locators are how you find elements on a page. The best locators use accessible attributes — role, label, placeholder, text — because they match how users interact with the page, not how it was built. This guide covers every locator type, when to use each, and how to filter and chain
Test Automation
Selenium is the original web automation framework, powering browser tests since 2004. This tutorial covers everything from installation to running your first test — in Python and JavaScript. You'll also learn Selenium's biggest pain points (explicit waits, element staleness, cross-browser setup) and when modern tools like Playwright
Test Automation
Node.js has excellent testing support in 2026. The built-in node:test module handles most use cases without extra dependencies. For richer tooling, Jest and Vitest are the top choices. This guide covers everything: picking the right tool, writing unit and integration tests, mocking modules, testing async code, and setting
Test Automation
Cypress is a JavaScript E2E testing framework built specifically for the modern web. It runs inside the browser, giving you real-time visibility into your tests as they execute. This guide covers installation, writing your first tests, handling authentication, CI integration, and when to choose Cypress over Playwright or Selenium. Key
Tools & Frameworks
Jest is the most widely used JavaScript testing framework. It ships with everything you need: a test runner, assertion library, mocking system, and code coverage. This guide covers setup, writing tests, mocking dependencies, testing async code, React Testing Library integration, and common patterns. Key Takeaways Jest is batteries-included. Unlike Mocha
Test Automation
Playwright is Microsoft's end-to-end testing framework for web applications. It's the best browser automation tool available in 2026 — faster than Selenium, more capable than Cypress, and works across Chromium, Firefox, and WebKit. This guide covers everything from installation to CI/CD, with real code examples throughout.