rails/rails — pull request #16187 by jone (2014-07-16 10:04:14+00:00)
Title: Update assertion methods in testing guide

Adds documentation for these assertion methods to the testing guide:
- `assert_empty`
- `assert_not_empty`
- `assert_includes`
- `assert_not_includes`

I've also linked the minitest assertions documentation page for the full list of minitest assertions.

/cc @senny