Book Image

Mastering Selenium WebDriver

By : Mark Collin
Book Image

Mastering Selenium WebDriver

By: Mark Collin

Overview of this book

<p>Selenium WebDriver, also known as Selenium 2, is a UI automation tool used by software developers and QA engineers to test their web applications on different web browsers. The Selenium WebDriver API is fully object oriented compared with the deprecated Selenium RC. The WebDriver API provides multi-language support and run tests on all the most popular browsers.</p> <p>In this wide and complex World Wide Web era, this book will teach you how to tame it by gaining an in-depth understanding of the Selenium API.</p> <p>This book starts with how to solve the difficult problems that you will undoubtedly come across as you start using Selenium in an enterprise environment, followed by producing the right feedback when failing, and what the common exceptions are, explain them properly (including the root cause) and tell you how to fix them. You will also see the differences between the three available implicit waits and explicit waits, and learn to working with effective page objects.</p> <p>Moving on, the book shows you how to utilize the Advanced User Interactions API, how you can run any JavaScript you need through Selenium, and how to quickly spin up a Selenium Grid using Docker containers.</p> <p>At the end, the book will discuss the upcoming Selenium W3C specification and how it is going to affect the future of Selenium.</p>
Table of Contents (17 chapters)
Mastering Selenium WebDriver
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

FluentWaits – the core of explicit waits


At the core of explicit waits is the incredibly powerful fluent wait API. All the WebDriverWait objects extend FluentWait. So, why would we want to use FluentWait?

Well, we get more granular control over the Wait object, and we can easily specify specific exceptions to ignore. Let's have a look at an example:

Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
        .withTimeout(15, TimeUnit.SECONDS)
        .pollingEvery(500, TimeUnit.MILLISECONDS)
        .ignoring(NoSuchElementException.class)
        .withMessage("The message you will see in if a TimeoutException is thrown");

As you can see in the preceding code, we created a wait object with a 15-second timeout that polls every five hundred milliseconds to check whether a condition is met. We have decided that while waiting for our condition to become true, we want to ignore any instances of NoSuchElementException. So, we have specified it in the ignoring method. We also want...