Automating CSS regression testing

Technical guest-blog article for CSS-Tricks...
https://css-tricks.com/automating-css-regression-testing/

...The following is a guest post by Garris Shipon. We've touched on the four types of CSS testing here before. Regression testing is the hardest. It's the type where you're trying to test if a change you made to CSS resulted in any unexpected visual problems. This is made more difficult with responsive designs. Garris built a tool for doing this as he embarked upon a new responsive design for a large scale site. Here, he'll walk you through the whole thing...