Testing Vue.js Components with Jest: A concise guide to testing Vue.js components using Jest and the official Vue Test Utils library

Book Description
Unit testing in modern component-based JavaScript frameworks is not straightforward. You need a test suite that is reliable and runs quickly. Components are connected to one another, and the browser adds a layer of UI, which makes everything inter-dependent while we test components in isolation. Jest is a fully-featured JavaScript testing framework that will do all your work for you.

This book shows you how to test Vue.js components easily and take advantage of the fully-featured Jest testing framework with the aid of practical examples. You’ll learn the different testing styles and their structures. You’ll also explore how your Vue.js components respond to various tests. You’ll see how to apply techniques such as snapshot testing, shallow rendering, module dependency mocking, and module aliasing to make your tests smooth and clean.

By the end of this book, you’ll know all about testing your components by utilizing the features of Jest.

What you will learn
Set up a Vue-test project to get started with Jest
Unit test your components using techniques such as shallow rendering
Gain insights into how to test the reactive parts in the logic of the Vue.js components
Explore how to test deeply rendered Vue.js components
Perform easy and quick tests with module dependency mocking, module aliasing, and more
Know-how and when to use snapshot testing
Who this book is for
If you are a programmer looking to make your development process smooth and bug-free, this is an ideal book for you. Prior knowledge and experience of JavaScript will help you quickly and easily grasp the concepts explained in this book.

Table of Contents
Write the First Vue.js Component Unit Test in Jest
Test Deeply Rendered Vue.js Components
Test Styles and Structure
Test Properties and Custom Events
Test Computed Properties and Watchers
Test Methods and Mock Dependencies
Test Vue.js Slots
Enhance Jest Configuration with Module Aliases
Snapshot Testing