I started with a small series of blog posts how to write integration tests for AEM, which you can both ran stand alone and which are also picked up by Cloud Manager. Even a few basic tests can save you a ton of manual tests.
See https://cqdump.wordpress.com/integration-tests-with-aem/ for an overview and the links to the individual posts.
If you have questions to it, please raise it here in the AEM Forums and ping me directly (via "@joerghoh" ), so I can react on it.
Thank you for sharing and created this wonderful content.