Mastering React Test-Driven Development

Build simple and maintainable web apps with React, Redux, and GraphQL, 2nd Edition

By: Daniel Irvine, Justin Searls

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eText | 30 September 2022 | Edition Number 2

At a Glance

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Learn test-driven and behavior-driven development techniques that will help you build real-world React applications confidently in your software

Key Features

Explore the TDD process, how it works, and why it will help you write maintainable React apps
Develop a component testing framework from scratch to help you understand the mechanics of good unit testing
Manage complexity by using unit tests and end-to-end acceptance tests to drive the design of your apps

Book Description

Test-driven development (TDD) is a programming workflow that helps you build your app by specifying its behavior as automated tests. The workflow is designed for future-proofing apps so that they can be modified easily without fear of breaking existing functionality. This workflow also has other benefits such as helping dev teams communicate their intentions by way of test specifications.

This book teaches you how to apply the workflow when building React apps, using Jest. You'll explore the creation of a sample app, using standard React libraries that professional React developers are likely to encounter when building apps, such as React Router, Redux, and Relay (GraphQL). The TDD workflow is supported by various testing techniques and patterns, which are useful even if you're not following the TDD process. This book covers these techniques by walking you through the creation of a component test framework. You'll understand the theory behind automated testing that will help you work with any of the test libraries that are in standard usage today, such as the React Testing Library. This second edition has been revised with a stronger focus on concise code examples and has been fully updated for React 18.

By the end of this TDD book, you'll be able to use React, Redux, and GraphQL to develop robust web apps.

What you will learn

Build test-driven applications using React 18 and Jest
Understand techniques and patterns for writing great automated tests
Use test doubles and mocks effectively
Test-drive browser APIs, including fetch and WebSockets
Integrate with libraries such as React Router, Redux, and Relay (GraphQL)
Use Cucumber.js and Puppeteer to build BDD-style acceptance tests for your applications
Build and test async Redux code using redux-saga and expect-redux

Who This Book Is For

This TDD React book is for JavaScript developers who are looking to improve and learn testing practices and increase the quality and maintainability of their applications.