Test interaction handlers, UI controls, and browser utilities

[jfirebaugh]

Figure out how to test our event handling and interaction modules.

[jfirebaugh]

Possible approaches:

• JSDom. Pro: likely less unpredictability / hard-to-debug timing issues than a browser environment. Con: likely lower fidelity event implementation.
• Reintroduce real-browser test suite using smokestack. Pro: higher fidelity. Con: https://twitter.com/tmcw/status/646345048142032896
• Selenium?

[lucaswoj]

[anandthakker]

JSDom. Pro: likely less unpredictability / hard-to-debug timing issues than a browser environment. Con: likely lower fidelity event implementation.

At this point in time, I would vote for this particular tradeoff. I think it would be the quickest way to get started and I'm betting a large majority of these tests would not require a super high fidelity event environment. (E.g. #2972 )

[lucaswoj]

+ browser utilities (i.e. js/util/browser/*.js) 😄

[jfirebaugh]

We've been gradually filling these out.