Selenium/Getting Started/Run tests targeting MediaWiki-Docker

This page describes how to run Selenium tests locally on your development install of MediaWiki. This tutorial is based on the setup from MediaWiki-Docker.

Advantages

 * It will be fast, since the target machine is local. MediaWiki core Selenium test run takes about 4 minutes on my machine. (As of September 2019.)
 * Works without an internet connection.

Disadvantages

 * You will have to install MediaWiki, Selenium and their dependencies on your machine.
 * You will be executing over 900 JavaScript packages (as of August 2019) directly on your machine with access to all personal/work files.

Prerequisites

 * MediaWiki. We assume you have a MediaWiki-Docker setup. It should be similar for other local MediaWiki installations.
 * Install Google Chrome.
 * Install Node.js and npm.