Book Image

A Frontend Web Developer’s Guide to Testing

By : Eran Kinsbruner
3 (1)
Book Image

A Frontend Web Developer’s Guide to Testing

3 (1)
By: Eran Kinsbruner

Overview of this book

Testing web applications during a sprint poses a challenge for frontend web app developers, which can be overcome by harnessing the power of new, open source cross-browser test automation frameworks. This book will introduce you to a range of leading, powerful frameworks, such as Selenium, Cypress, Puppeteer, and Playwright, and serve as a guide to leveraging their test coverage capability. You’ll learn essential concepts of web testing and get an overview of the different web automation frameworks in order to integrate them into your frontend development workflow. Throughout the book, you'll explore the unique features of top open source test automation frameworks, as well as their trade-offs, and learn how to set up each of them to create tests that don't break with changes in the app. By the end of this book, you'll not only be able to choose the framework that best suits your project needs but also create your initial JavaScript-based test automation suite. This will enable fast feedback upon code changes and increase test automation reliability. As the open source market for these frameworks evolves, this guide will help you to continuously validate your project needs and adapt to the changes.
Table of Contents (19 chapters)
1
Part 1 – Frontend Web Testing Overview
7
Part 2 – Continuous Testing Strategy for Web Application Developers
11
Part 3 – Frontend JavaScript Web Test Automation Framework Guides

Learning about Puppeteer's advanced test automation capabilities

Following Chapter 11, Working with the Playwright Framework, we will cover the advanced capabilities of Google Puppeteer.

Note that measuring code coverage (https://pptr.dev/#?product=Puppeteer&version=v13.1.0&show=api-class-coverage) is also considered a powerful capability within software test automation; however, since we covered the abilities of code coverage with Istanbul and Babel in Chapter 8, Measuring Test Coverage of the Web Application, we will not repeat it here. Keep in mind that, like Playwright, Puppeteer JavaScript and CSS code coverage with Istanbul (https://github.com/istanbuljs/puppeteer-to-istanbul) is only supported on Chromium-based browsers.

Puppeteer namespaces

Within the Puppeteer framework, frontend web application developers can utilize the device's methods, network conditions, and error-handling capabilities.

To perform web application testing on specific devices...