Book Image

React 16 Tooling

By : Adam Boduch, Christopher Pitt
Book Image

React 16 Tooling

By: Adam Boduch, Christopher Pitt

Overview of this book

React 16 Tooling covers the most important tools, utilities, and libraries that every React developer needs to know — in detail. As React has grown, the amazing toolset around it has also grown, adding features and enhancing the development workflow. Each of these essential tools is presented in a practical manner and in a logical order mirroring the development workflow. These tools will make your development life simpler and happier, enabling you to create better and more performant apps. Adam starts with a hand-picked selection of the best tools for the React 16 ecosystem. For starters, there’s the create-react-app utility that’s officially supported by the React team. Not only does this tool bootstrap your React project for you, it also provides a consistent and stable framework to build upon. The premise is that when you don’t have to think about meta development work, more focus goes into the product itself. Other React tools follow this same approach to automating and improving your development life. Jest makes unit testing quicker. Flow makes catching errors easier. Docker containers make deployment in a stack simpler. Storybook makes developing components straightforward. ESLint makes writing standardized code faster. The React DevTools plugin makes debugging a cinch. React 16 Tooling clears away the barriers so you can focus on developing the good parts. In this book, we’ll look at each of these powerful tools in detail, showing you how to build the perfect React ecosystem to develop your apps within.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
2
Efficiently Bootstrapping React Applications with Create React App
Index

Summary


In this chapter, you learned about Jest. You learned that the key driving principles of Jest are creating effective mocks, test isolation and parallel execution, and ease of use. You then learned that react-scripts makes running your unit tests even easier by providing some basic configuration to use with Jest.

When running Jest, you saw that watch mode is the default when running Jest via react-scripts. Watch mode is especially useful when you have lots of tests that don't need to run every time you make a source change—only relevant tests are executed.

Next, you performed some basic assertions in your unit tests. Then, you created a mock for the fs module and performed assertions on the mocked functions to ensure that they're being used as expected. You then evolved these tests to make use of the inherent asynchronous capabilities of Jest. Unit test coverage reporting is built into Jest, and you learned how to view this report by passing an additional argument.

In the next chapter...