"As you write more and more functions you’ll eventually want to convert these informal, interactive tests into formal, automated tests. That process is called unit testing. Unfortunately, it’s beyond the scope of this book, but you can learn about it in http://r-pkgs.had.co.nz/tests.html."
Link gives 404 error for page not found
I updated to https://r-pkgs.org/testing-basics.html
* Use _quarto.yml
* Rmd -> qmd
* Update build type to None
* Update styling Styling to get close to bs4_book + color
* Convert crossrefs
* Covert chunk options
* Switch to plausible for analytics
* Update action