As many of you know, I don't make it a secret that I'm not an amazing front-end guy. However, since I have a mantra of "test all the things" that I'm working on, when I have to do front end work, it's my goal to test everything.
I start by using sitespeed.io for testing the page load and performance times of my application. This is critical in ensuring that the code that I'm writing is performant, and doesn't introduce any critical latency bugs to the application. I can integrate sitespeed.io into my gitlab workflows – which is super critical, as I can reject any builds that are not performant, and a video and screen shot of the home page (and any associated pages that I'm testing) are part of the artifacts created: this enables me to provide "page level diffs" showing the content on the page that has been changed. The one thing that Sitespeed cannot do, however, is testing functionality. You're limited to grabbing pages via URL, and can't pass data into forms for posting.
I keep both of these actions in the respective .gitlab-ci.yml file, and the logs of both (specifically, the output from
cypress run and sitespeed.io's docker run) are stored as artifacts. Add this into Gitlab's AutoDevops, and you've got a nice mix of tools that enable front-end testing on your applications.