Testing
DOM snapshots catch structural changes. Visual snapshot testing catches what DOM snapshots miss: layout shifts, color changes, font rendering differences, and the thousand small things that look fine in code but break in the browser. Percy and Chromatic are the two dominant tools in this space, and they take meaningfully
Testing
Stryker is the leading mutation testing framework for JavaScript and TypeScript. It supports Jest, Mocha, Jasmine, and Karma — and generates one of the clearest mutation reports available in any language ecosystem. Here's how to set it up and actually use the results. Installation Start by installing the Stryker
Testing
PIT (PITest) is the standard mutation testing tool for Java. It's fast, integrates cleanly with Maven and Gradle, and generates detailed HTML reports that overlay mutation results directly onto your source code. Here's how to get it running and use the output effectively. Why PIT Over
UX Testing
Remote usability testing tools split into two categories: moderated research platforms (Lookback, UserTesting) that support live facilitated sessions, and behavioral analytics tools (Hotjar, FullStory) that passively observe real user behavior at scale. Maze sits in between — unmoderated task-based testing with your own participants. The right tool depends on whether
Testing
Exploratory testing doesn't require specialized tools — a text editor and a bug tracker will do. But the right tools reduce friction between testing and documentation, helping testers capture observations in real time without losing focus on the software under test. This guide covers the main categories of exploratory
Testing
Real-time APIs — WebSocket, Server-Sent Events, gRPC streaming — are increasingly common but still poorly supported by most API testing tools. The category has matured significantly in the last two years: Postman added WebSocket support in 2021, Insomnia and Hoppscotch followed, and load testing tools like k6 and Artillery now