In setup we are creating an instance of the headless library and issuing a. destroy end def run setup yield teardown end run do. # filename: headless2.rb require 'selenium-webdriver' require 'rspec/expectations' require 'headless' def setup = Headless. Now let's create a simple Selenium script. In Linux we need to find the relevant package names for the package manager and install them (e.g., apt-get install xvfb firefox for Debian based systems like Ubuntu, yum install Xvfb firefox for RedHat based systems, etc.). An Exampleīefore we can use Xvfb, we need to install it (along with the browser we want if it's not already loaded). It enables you to run graphical applications without a display (e.g., browser tests on a CI server) while also having the ability to take screenshots. Xvfb (short for X virtual framebuffer) is an in-memory display server for UNIX-like operating system (e.g., Linux). In order to run your tests using a browser that's loaded on your CI Server you will need to configure your tests to launch the browser virtually (e.g., using something like Xvfb). If you want to run your tests headlessly on a Continuous Integration (CI) server you'll quickly realize that you can't with an out-of-the-box setup since there is no display output for the browser to launch in.

Selenium ubuntu 20.04