Apologies if this isn't the right place to share this!
After looking for an assertions library for a different project, I decided to write my own! It's inspired by Gomega, an assertions library for Go.
I put a big emphasis on useful, well-formatted output and making it easy to write your own matchers without having to reimplement any formatting logic.
I also designed it to be batteries-included, with a lot of matchers included out of the box.
I would love feedback on the API design, if y'all have any to share!