Hugues Bernet-Rollande
Lead Developer @ Wired Beauty
Light talk @ DotSwift Conference Paris 2015
Please note that only work with Mac OS Playground, unfortunaly not iOS's one. (rdar://25189853)
Video available here
@chrisscholly and @gabrielPeart have created a little library to make running Unit Test in Playground even easier, check it out: https://github.com/WhiskerzAB/PlaygroundTDD