I've been doing a lot more Meteor these days, especially working on Drupal 8 SSO with Meteor, and could not find a reasonably complete and up-to-date (for Meteor 1.1.0.3) list of the Tinytest assertions, so I updated, reordered, and completed the existing gist on the topic.

So here is the Meteor Tinytest cheatsheet: https://gist.github.com/FGM/8075e9e249d453d8601b : complete list of assertions and helpers for your test methods.