19 articles tagged “Testing”
Which breakpoints to test in 2026 (with device data), what breaks at each one, manual vs automated testing, the tools, and how to screenshot every breakpoint on every deploy.
A practical website migration testing checklist: build the URL inventory, verify redirects and content, compare every page visually at every breakpoint, and keep monitoring after launch.
Diffy's AI Summary reads every changed screenshot in a comparison and writes one plain-English brief, split into Critical and Minor. Available on request.
Diffy's AI check catches cookie banners, CDN challenge pages, unloaded media and broken layouts before they turn into false positives in your results.
Visual regression testing sits between manual QA and automated tests. When it makes sense, what to test, and why good screenshots are hard.
25 web development and QA testing statistics on bugs, automation and design, with sources, to help you benchmark your own testing process.
A step-by-step regression testing plan for a website you did not build, including how to prioritise tests, plus two real-world worked examples.
The visual bugs you can catch by eye and the ones you cannot, based on the regressions we see most often across the sites Diffy tests daily.
What automation testing is, when it beats manual testing, the main types of automated tests, and how to choose the right tool for your project.
User acceptance testing explained: prerequisites, a full UAT checklist, how to plan it, and how to identify test scenarios and prepare test data.
Compatibility testing explained: the main types, worked examples, and the tools we recommend for checking your site across browsers and devices.
Performance testing types explained: load, stress, volume and scalability testing, how long each one takes, and the tools we recommend.
The main non-functional testing types — load, stress, volume, scalability, failover, compatibility and usability — with examples and tools.
Functional testing explained: unit, integration, system and acceptance testing, with objectives, examples and recommended tools for each type.
Functional vs non-functional testing compared: what each one measures, when you need it, and the tools we recommend for both kinds of testing.
Non-functional testing explained: load, volume, security, scalability and more, with examples and the tools we recommend for each type.
How to capture screenshots of tabs, mobile menus and sliders by running click actions on the page before each screenshot is taken.
False positives are the biggest pain in visual regression testing. Here is how to handle dynamic content using CSS selectors and content fixtures.
How to run visual regression testing against a Patternlab component library in Drupal and catch regressions across every component at once.
