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UI Testing with Puppeteer

UI Testing with Puppeteer

By : Kondratiuk
4.8 (13)
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UI Testing with Puppeteer

UI Testing with Puppeteer

4.8 (13)
By: 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)
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Creating a Puppeteer browser

The signature of the launch function is not launch(), but launch(options). Thanks to the freedom we have in JavaScript, we can just avoid passing that argument, and the launch function will get options as undefined.

Using the Puppeteer.launch function

These are all the options Puppeteer.launch supports in Puppeteer 7 according to the official docs (https://github.com/puppeteer/puppeteer/blob/v7.0.0/docs/api.md#puppeteerlaunchoptions):

  • product: Which browser to launch. At this time, this is either chrome or firefox.
  • ignoreHTTPSErrors: Whether to ignore HTTPS errors during navigation. This option will become handy when you want to automate websites with invalid or missing SSL certificates. This will prevent Chromium from returning an invalid certificate page in those cases.
  • headless: Whether to run the browser in headless mode. Defaults to true unless the devtools option is true.
  • executablePath...

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