Front End Testing with Wraith: A Step by Step Recipe

I had occasion to finally get to one of my goals from last year – and that was to introduce some testing to my front end development.

My goal was to have a way to have a before/after visual regression test. The open source Wraith project, from the BBC, fits the bill wonderfully.

This post is merely meant to be a step-by-step procedure to get Wraith up and running. I’m not going to provide any context to what each step means.

First off, this post assumes that you’re running Mac OS X, and already have Ruby installed. This post also assumes that you want to use the “history” mode in Wraith – where you are taking two snapshots of the same URL. (The “standard” mode requires two different URLs).

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