Need tests for JS code

[jhump]

This repo includes about 2k lines of JavaScript code (most of the actual logic for the web UI), but does not have any JS tests (or even a JS test harness). We'll likely want to use PhantomJS or similar, since the JS code needs to run in the context of a browser and interact with page DOM elements.

[n0v1]

I can recommend testcafe for writing e2e tests for browser applications. Simple to use yet powerful. (I'm not related to this project in any way, just a happy user of it)