Book Image

Selenium WebDriver Quick Start Guide

By : Pinakin Chaubal
Book Image

Selenium WebDriver Quick Start Guide

By: Pinakin Chaubal

Overview of this book

Selenium WebDriver is a platform-independent API for automating the testing of both browser and mobile applications. It is also a core technology in many other browser automation tools, APIs, and frameworks. This book will guide you through the WebDriver APIs that are used in automation tests. Chapter by chapter, we will construct the building blocks of a page object model framework as you learn about the required Java and Selenium methods and terminology. The book starts with an introduction to the same-origin policy, cross-site scripting dangers, and the Document Object Model (DOM). Moving ahead, we'll learn about XPath, which allows us to select items on a page, and how to design a customized XPath. After that, we will be creating singleton patterns and drivers. Then you will learn about synchronization and handling pop-up windows. You will see how to create a factory for browsers and understand command design patterns applicable to this area. At the end of the book, we tie all this together by creating a framework and implementing multi-browser testing with Selenium Grid.
Table of Contents (10 chapters)

DOM traversal

Now that we have seen the basic definitions of XPaths and CSS and also looked at what WebElements are, let's understand how we can use these to exploit the DOM. DOM traversal entails getting to the desired element with the help of either XPaths or CSS. It is possible to traverse the DOM in a forward and backward direction with XPaths but traversal through XPaths is slow compared to CSS. Traversal using CSS can only be done in the forward direction. In order to traverse the DOM, using either XPaths or CSS, we need to understand the By class.

Dissecting the By class

The By class is an abstract class that has eight static methods and eight inner classes. Let's understand the structure of the By class.