It's the middle of December, which means a new version of Ruby will be released in just a few days. Even if you don't plan on upgrading your Rails applications to the latest version on day one, it's never a bad time to begin planning your next upgrade.
(December 18, 2017)
Test with confidence!
If you liked my series on practical advice for adding reliable tests to
your Rails apps, check out the expanded ebook version. Lots of
additional, exclusive content and a complete sample Rails application.