Some articles:
- How to automate a visual regression test (WebdriverCSS)
- CSS Testing with PhantomCSS, PhantomJS, CasperJS and Grunt (PhantomCSS)
- Automating Style Guide-Driven Development (Style Guide Based Testing
- Automating CSS Regression Testing (BackstopJS)
Some tools:
- Self-Paced Tutorials (disclaimer: still a work-in-progress)
- Visual Regression Testing Newsletter
If you help with a local user group, I'm available to present on the topic remotely. Reach out to me on twitter.
see also https://github.com/mojoaxel/awesome-regression-testing