Any assert in ./asserts folder is same thing you use in .extend
It's just a pure function which receives base as first argument and calling arguments further.
There are more info in template assert. You can find it here: asserts/_template.js + test/asserts/template.test.js. Use it for creating your own templates.
When you are ready for pull request - make sure it has:
- tests with
ok,!ok, andreturnedsections - Description. (I will copy-paste it into API section of this doc)
In dev process use: