UI Testing with Puppeteer

Implement end-to-end testing and browser automation using JavaScript and Node.js

Dario Kondratiuk 지음

Packt(GCO Science) 2021년 03월 11일 출간

작품소개

책소개

▶Book Description
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.

▶What You Will Learn
-Understand browser automation fundamentals
-Explore end-to-end testing with Puppeteer and its best practices
-Apply CSS Selectors and XPath expressions to web automation
-Discover how you can leverage the power of web automation as a developer
-Emulate different use cases of Puppeteer such as network speed tests and geolocation
-Get to grips with techniques and best practices for web scraping and web content generation

▶Key Features
-Get up and running with Puppeteer and discover best practices for automation testing
-Automate your modern web applications using Jest and Mocha with Puppeteer
-Generate screenshots using Puppeteer and find out how they can be used for UI regression tests

▶Who This Book Is For
The book i

목차

▶TABLE of CONTENTS
-Chapter 1: Getting started with Puppeteer
-Chapter 2: Automated Testing and Test runners
-Chapter 3: Navigating through a website
-Chapter 4: Interacting with a page
-Chapter 5: Waiting for elements and network calls
-Chapter 6: Executing and Injecting JavaScript
-Chapter 7: Generating Content with Puppeteer
-Chapter 8: Environments emulation
-Chapter 9: Scraping tools
-Chapter 10: Evaluating and Improving the Performance of a Website

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▶What this book covers
- Chapter 1, Getting started with Puppeteer, lays the foundation for the book. It will help you get started with Puppeteer by introducing you to the tool and getting you acquainted with the essentials. You will also learn how to write async code in JavaScript.

- Chapter 2, Automated Testing and Test runners, covers end-to-end testing fundamentals and the difference between different types of tests. In the latter part of the chapter, we will cover creating and organizing a test project and getting started with test runners.

- Chapter 3, Navigating through a website, sees you start coding your tests. You will learn how to launch a browser, navigate to a page, and make some assertions. Then, you will see how to publish your tests to the cloud to be tested.

- Chapter 4, Interacting with a page, is all about interaction. Once you get to a page, how do you test it? How do you simulate user interaction? This chapter takes you through the most common ways of interacting with a page. This chapter also covers some basic HTML concepts, so you can take advantage of all the tools Puppeteer provides.

- Chapter 5, Waiting for elements and network calls, teaches you how to wait for the different scenarios on the page you are testing―waiting for the page to load and be ready, waiting for a button to be enabled, waiting for an Ajax call to be completed, and so on. This chapter covers all the tools that Puppeteer offers to handle these scenarios.

- Chapter 6, Executing and Injecting JavaScript, shows you one of the best features of Puppeteer: injecting JavaScript code easily. In this chapter, we will leave the end-to-end testing world for a moment and dive into web automation using a general-purpose tool.

- Chapter 7, Generating Content with Puppeteer, expands on the usage of Puppeteer and shows you how we can create content using Puppeteer. We'll start by learning how screenshots are created and how they can be used for regression tests. Then, we will cov

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▶ Preface
Puppeteer is a multi-purpose browser automation tool created by Google. You will see Puppeteer being used in many different ways. It's used for web scraping, task automation, content generation, web monitoring, and UI testing.

This book focuses on UI testing, but we won't stop there. For instance, we have a chapter focused on content generation and another chapter that focuses on web scraping. If you read this book from cover to cover, you will be able to use Puppeteer in all fields.

When I found that there was no book about Puppeteer available on the market, that really motivated me: I wanted this book to cover the entire Puppeteer API. By the end of this book, you'll have learned about the whole Puppeteer API.

작가정보

저자(글) Dario Kondratiuk

Dario Kondratiuk is a web developer since 2001. He won the Microsoft MVP (most valuable professional) award in 2020 for his contributions to the developer community. Dario has been working with Puppeteer since the beta versions, back in 2017. He is the author of Puppeteer-Sharp, a Puppeteer port to .NET, and Playwright-Sharp, a Playwright port to .NET.