Book Image

Learning Redux

By : Bugl
Book Image

Learning Redux

By: Bugl

Overview of this book

The book starts with a short introduction to the principles and the ecosystem of Redux, then moves on to show how to implement the basic elements of Redux and put them together. Afterward, you are going to learn how to integrate Redux with other frameworks, such as React and Angular. Along the way, you are going to develop a blog application. To practice developing growing applications with Redux, we are going to start from nothing and keep adding features to our application throughout the book. You are going to learn how to integrate and use Redux DevTools to debug applications, and access external APIs with Redux. You are also going to get acquainted with writing tests for all elements of a Redux application. Furthermore, we are going to cover important concepts in web development, such as routing, user authentication, and communication with a backend server After explaining how to use Redux and how powerful its ecosystem can be, the book teaches you how to make your own abstractions on top of Redux, such as higher-order reducers and middleware. By the end of the book, you are going to be able to develop and maintain Redux applications with ease. In addition to learning about Redux, you are going be familiar with its ecosystem, and learn a lot about JavaScript itself, including best practices and patterns.
Table of Contents (13 chapters)

Testing Redux

Because Redux reducers and action creators are just functions, and actions are simply objects, they are easy to test. Furthermore, many of those functions are pure, which means they have no side effects. Pure functions only use their arguments and constants to produce the output. This is why we only need to pass certain arguments and check the output to test the function. If there are side effects involved (which is the case for asynchronous action creators), we need to do some mocking.

Synchronous action creators

We start by writing tests for our synchronous action creators. Remember: action creators are functions which return action objects. To test them, we need to call the action creator and check if it returns...