Selenium/How-to/Run tests targeting MediaWiki-Vagrant

For this example, we will not enable any roles and we will use MediaWiki core.

Advantages
Running Selenium tests targeting MediaWiki-Vagrant machine has several advantages:


 * It will be fast, since the target machine is local. MediaWiki core Selenium test run takes about 2 minutes on my machine. (As of September 2019.)
 * After everything is set up, you do not need internet connection.
 * Debugging failed tests will be easier, since are able to see the browser using  environment variable. See README.md for more information.
 * You are probably already familiar with MediaWiki-Vagrant and have it installed.

Disadvantages

 * You might not be familiar with MediaWiki-Vagrant, so you will have to learn how to install and use yet another tool.
 * You will have to install MediaWiki-Vagrant, Selenium and their dependencies on your machine.

Set up MediaWiki-Vagrant

 * Follow instructions at MediaWiki-Vagrant.

Install dependencies
Depending on your operating system, installing dependencies will be different.

Chrome

 * Install Chrome.
 * Download ChromeDriver and put it in a folder included in.

Node.js

 * Install Node.js.
 * Install required npm packages.

or the machine
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