SiteEffect - Visual regression testing for D8 core

SiteEffect is an advanced visual regression testing framework. It detects layout, style and content changes caused by the latest commit and presents those changes in an intuitive 'diff-like' UI. 

In the case of Drupal, SiteEffect can help to track and test changes in core development. I will show some example issues that SiteEffect helped to solve. Besides that I will present - a yet still to build - infrastructure which lets selected users from the community use SiteEffect to automatically test core commits and analyze resulting changes.

The idea of specifically testing D8 core was the result of discussions after my session at the last years Dev Days in Szeged. This year I want to present the results of last years work, get feedback and discuss further steps with the community.