[CODE] Create Unit Tests, Consider Continuous Integration

**Is your feature request related to a problem? Please describe.**
This project is quickly acquiring collaborators, and tests will help align the outcomes of our work and hopefully make @billimarie's role a little easier!

**Describe the solution you'd like**
Write [Mocha](https://atmospherejs.com/meteortesting/mocha) Unit Tests as per [Meteor/Testing](https://guide.meteor.com/testing.html). This could be a continuous project, as more and improved tests will always be necessary!

Perhaps a separate issue could be used to integrate continuous testing (CircleCI).

No files, existing tests, or entry points are named. Start by inspecting the repository structure and current test setup, then review the linked Mocha and Meteor/Testing guidance. Done would require an agreed test scope with working Mocha unit tests; CircleCI integration is suggested as a separate issue.

Written by the indexing model from the issue text.