Are there Unit / etc screenshot tests?

Question

Software testing

Good evening!
I wrote a highlighter for the sublime, now I want to refactor, but I'm afraid to break something and not notice it.
Is there a tool to cover a unit (or how can it be called in this case) with sublime editor screenshot tests?
ps I heard that chrome assemblies are checked with about the same test.

Answer 1

The guys from the BBC are faced with a similar problem, but they "take pictures" of the portal page, not the program link.
There is a tool for this here https://github.com/BBC-News/wraith
It is unlikely that this will completely work for the sublime option, but you can try to tear out the part that compares the screenshots.
Good luck !