Refactor end-to-end tests

[arturi]

• test on a lightweight page instead of a website that takes time to generate / start server
• use webdriverio instead of selenium-webdriver, because nicer APIs: webdriverjs vs selenium-wedriverjs (question) webdriverio/webdriverio#138 (comment).
• use webdriverio with built-in mocha runner to run tests
• run locally as well as remote on Selenium (been broken for me for a while on our test setup, so only remote tests worked)
• add more devices/OSes

please kindly ignore that I typed enetoent instead of endtoend

[arturi]

Okay, this seems to be working now, one page that we can run 3 tests against, the page is served by a built-in thing in webdriberio, so we don’t need to run website and custom bootandkill script anymore. New tests and platforms can be gradually added.

[goto-bus-stop]

should this be a devDependency?

[arturi]

Yep, fixed, thanks.

[goto-bus-stop]

yay, works on my machine too :D
maybe include a blurb on how developers should set this up in https://github.com/transloadit/uppy/blob/master/website/src/guide/contributing.md? or we could just link to http://webdriver.io/guide.html somewhere. webdriverio doesn't give very clear errors when the selenium server is not running (just "connection refused", which makes sense, but not if you don't know that you need to run selenium 😛 )

[arturi]

yay, works on my machine too :D

Awesome! Glad you that you managed to run it and it works 🎉

maybe include a blurb on how developers should set this up

Great idea, done!