Book Image

Mastering Selenium WebDriver 3.0 - Second Edition

Book Image

Mastering Selenium WebDriver 3.0 - Second Edition

Overview of this book

The second edition of Mastering Selenium 3.0 WebDriver starts by showing you how to build your own Selenium framework with Maven. You'll then look at how you can solve the difficult problems that you will undoubtedly come across as you start using Selenium in an enterprise environment and learn how to produce the right feedback when failing. Next, you’ll explore common exceptions that you will come across as you use Selenium, the root causes of these exceptions, and how to fix them. Along the way, you’ll use Advanced User Interactions APIs, running any JavaScript you need through Selenium; and learn how to quickly spin up a Selenium Grid using Docker containers. In the concluding chapters, you‘ll work through a series of scenarios that demonstrate how to extend Selenium to work with external libraries and applications so that you can be sure you are using the right tool for the job.
Table of Contents (15 chapters)

Introducing Docker

So, what is Docker?

Well, Docker is like a virtual machine (VM), but it's not. In a traditional VM setup, you would take a machine, install an operating system on that machine, and then install a hypervisor, such as VirtualBox (for more information, visit https://www.virtualbox.org) or VMware (to know more about VMware, check out http://www.vmware.com). You could then create a VM image on the hypervisor, which pretends to be a computer. This image would have its own BIOS and emulated hardware. You would then install an OS on this image. This is generally referred to as the guest OS. Once this is done, you would boot up the guest OS and then treat it like any other computer.

If you want to isolate your applications, you can create multiple guest OSes, but this can be costly:

Docker is slightly different. It is a program that you install on the host...