Book Image

Mastering React Native

Book Image

Mastering React Native

Overview of this book

React Native has completely revolutionized mobile development by empowering JavaScript developers to build world-class mobile apps that run natively on mobile platforms. This book will show you how to apply JavaScript and other front-end skills to build cross-platform React Native applications for iOS and Android using a single codebase. This book will provide you with all the React Native building blocks necessary to become an expert. We’ll give you a brief explanation of the numerous native components and APIs that come bundled with React Native including Images, Views, ListViews, WebViews, and much more. You will learn to utilize form inputs in React Native. You’ll get an overview of Facebook’s Flux data architecture and then apply Redux to manage data with a remote API. You will also learn to animate different parts of your application, as well as routing using React Native’s navigation APIs. By the end of the book, you will be able to build cutting-edge applications using the React Native framework.
Table of Contents (20 chapters)
Mastering React Native
Credits
Disclaimer
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Testing


In software development, there are several different kinds of testing. Each variety of testing serves a different purpose. Unit testing is used to ensure the accuracy of a single unit of computation. Component testing is a method of testing that ensures that the individual units work in concert when combined into a component, for instance, a React Native UI component.

In the React community, the primary tool for application testing is a library called Jest. Jest is an open source testing library, also created by Facebook, that builds on the functionality of a popular testing framework called Jasmine. Jest adds functionality to Jasmine to both make testing of JavaScript applications more robust and to add methods for testing React (and React Native) components.

Using Jest is so common among React Native developers, in fact, that it is now automatically installed and configured when an application is initialized (using react-native init). Looking in the package.json file for our RNNYT...