David
Needham
Developer Advocate
Pantheon
Type
Workshop
Experience level
Beginner
Duration
2 hours (workshop)
Room
3.05 radon
Starts at
Ends at
Industry track
Expertise topics
Summary
How do you tell if a change you made to your website has unintended side effects? Security updates should rarely result in anything changing visually, but how can you be sure?
Description
Visual regression testing automates the comparison process by taking screenshots of two URLs and comparing them. You can view a report that highlights the differences and use the pass/fail result to make decisions.
In this workshop, we will use the BackstopJS visual regression tool locally, via Node JS, to automate visual QA. We will also learn how to scale and automate these tests across multiple sites and URLs.
Agenda:
- Intro and setup
- Visual Regression Testing
- What is it?
- Benefits / Limitations
- BackstopJS
- What is it?
- Example demo
- Hacking the example (pt1 and pt2)
- Scaling example (pt1 and pt2)
- Backstop-crawl
- Continuous Integration
- What is it?
- Automating BackstopJS
- Breakout Sessions
