Book Image

Selenium Testing Tools Cookbook

By : UNMESH GUNDECHA
Book Image

Selenium Testing Tools Cookbook

By: UNMESH GUNDECHA

Overview of this book

Web technologies are becoming increasingly complex and there is a need to test your web applications against a vast number of browsers and platforms, so you need to build highly reliable and maintainable test automation. This book will help you test your web applications effectively and efficiently with Selenium WebDriver."Selenium Testing Tools Cookbook" is an incremental guide that will help you learn and use advanced features of Selenium WebDriver API in various situations for building reliable test automation. You will learn how to effectively use features of Selenium using simple and detailed examples. This book will also teach you best practices, design patterns, and how to extend Selenium."Selenium Testing Tools Cookbook" shows developers and testers who already use Selenium, how to go to the next step and build a highly maintainable and reliable test framework using advanced features of the tool.The book starts with tips on advanced location strategy and effective use of Selenium WebDriver API. Then it demonstrates the use of design patterns such as Data Driven Tests and PageFactory for building maintainable test automation. It also explains extending Selenium WebDriver API along with implementing custom tasks and setting up your own distributed environment to run tests in parallel.It concludes with tips on integrating Selenium WebDriver with other popular tools, testing mobile web applications, and capturing videos of test runs. This books provides examples in Java, C#, Ruby, and Python."Selenium Testing Tools Cookbook" will help you in building a highly robust and maintainable test automation framework from start to finish.
Table of Contents (18 chapters)
Selenium Testing Tools Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Comparing images in Selenium


Many a time, our tests need image-based comparison. For example, verifying whether correct icons are displayed, whether correct images are displayed in web pages, or comparing baseline screen layout with the actual layout.

Selenium WebDriver does have features to capture screenshots or images from the application under test, however, it does not have the feature to compare the images.

In this recipe, we will create an extension class for comparing images and use it in our Selenium tests.

Getting ready

Set up a new Java project for the CompareUtil class. This class will be used by Selenium tests as an extension for comparing images.

How to do it...

Let's implement the CompareUtil class with a method to compare two image files, as shown in the following code:

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.PixelGrabber;

public class CompareUtil {
  
  public enum Result { Matched, SizeMismatch, PixelMismatch };
  
  static Result CompareImage(String...