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

Chapter 8: Measuring Test Coverage of the Web Application

How do you know that you've tested your web application enough? There are many metrics and measures for code quality, including defect density, user stories covered, and other "black-box" measurements. However, there is also a complementary metric that has been on the market for a long while and is more of a "white-box" metric, which is code coverage. In this chapter, you will learn how to complement the quality assessment of your web application with code coverage across the various test automation frameworks featured in this book (Selenium, Cypress, Playwright, and Puppeteer).

The chapter is designed to cover the following:

  • Understand the differences between code coverage and test coverage and when to use them.
  • Learn about the recommended tool(s) for JavaScript code coverage measurements.
  • Understand how to complement code coverage measurements with test coverage capabilities (for...