Testing

I was writing internal documentation on how I set up automated language checking at Transloadit. Halfway through, I thought this could be useful to the rest of the world :earth_americas: as well, so I rewrote it in a more generic fashion. I'll attempt to first give a high-level overview of the problem, then I will drive all the way down to the low-level nuts & bolts of solving it. I hope you'll enjoy, here goes!

If you've written a webapp and you want to ensure that critical parts such as the signup process stay working, the best would be to have an actual user go through that process every time you change your codebase. But since that's both tedious & expensive, the second best thing is to automate a chrome browser (webkit engine anyway) to do this for you, and upload screenshots if anything unexpected happens. Welcome to CasperJS!