[AB] [67484522] Test photoplus

# PLEASE READ

Some things aren't very testable in the code's present state yet nevertheless are functioning in spite of showing a failure in Jasmine's results. This pull request covers some basic parts of photoplus for [this chore](https://www.pivotaltracker.com/story/show/67484522), so that I can refactor it into something more reliable and resolve [this bug](https://www.pivotaltracker.com/story/show/57256458).