Book Image

UI Testing with Puppeteer

By : Dario Kondratiuk
Book Image

UI Testing with Puppeteer

By: Dario Kondratiuk

Overview of this book

Puppeteer is an open source web automation library created by Google to perform tasks such as end-to-end testing, performance monitoring, and task automation with ease. Using real-world use cases, this book will take you on a pragmatic journey, helping you to learn Puppeteer and implement best practices to take your automation code to the next level! Starting with an introduction to headless browsers, this book will take you through the foundations of browser automation, showing you how far you can get using Puppeteer to automate Google Chrome and Mozilla Firefox. You’ll then learn the basics of end-to-end testing and understand how to create reliable tests. You’ll also get to grips with finding elements using CSS selectors and XPath expressions. As you progress through the chapters, the focus shifts to more advanced browser automation topics such as executing JavaScript code inside the browser. You’ll learn various use cases of Puppeteer, such as mobile devices or network speed testing, gauging your site’s performance, and using Puppeteer as a web scraping tool. By the end of this UI testing book, you’ll have learned how to make the most of Puppeteer’s API and be able to apply it in your real-world projects.
Table of Contents (12 chapters)

Chapter 1: Getting started with Puppeteer

I remember the first time I heard about browser automation. A friend told me that their QA team was testing using "automation." That sounded magical to me. People testing websites using "automation." After a few years, I learned that automation wasn't a magic potion, but instead a powerful tool not only for QA but also for developers, because we developers love to automate stuff, right?

That's why in the first part of this chapter, I want to show you how browser automation works and what makes Puppeteer unique. In the latter part of this chapter, we are going to review some asynchronous techniques that are going to be useful throughout the rest of the book, and throughout your automation journey.

This chapter will cover the following topics:

  • What is browser automation?
  • Introducing headless browsers
  • Puppeteer use cases
  • Setting up the environment
  • Our first Puppeteer code
  • Asynchronous...