Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
All Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Newsletter Hub
Free Learning
Arrow right icon
timer SALE ENDS IN
0 Days
:
00 Hours
:
00 Minutes
:
00 Seconds
Arrow up icon
GO TO TOP
React Design Patterns and Best Practices

You're reading from   React Design Patterns and Best Practices Build easy to scale modular applications using the most powerful components and design patterns

Arrow left icon
Product type Paperback
Published in Jan 2017
Publisher Packt
ISBN-13 9781786464538
Length 318 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
Michele Bertoli Michele Bertoli
Author Profile Icon Michele Bertoli
Michele Bertoli
Arrow right icon
View More author details
Toc

Table of Contents (19) Chapters Close

React Design Patterns and Best Practices
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Everything You Should Know About React FREE CHAPTER 2. Clean Up Your Code 3. Create Truly Reusable Components 4. Compose All the Things 5. Proper Data Fetching 6. Write Code for the Browser 7. Make Your Components Look Beautiful 8. Server-Side Rendering for Fun and Profit 9. Improve the Performance of Your Applications 10. About Testing and Debugging 11. Anti-Patterns to Be Avoided 12. Next Steps

Painless JavaScript testing with Jest


The most important way to learn how to test React components in the right way is by writing some code, and that is what we are going to do in this section.

The React documentation says that at Facebook they use Jest to test their components. However, React does not force you to use a particular test framework and you can use your favorite one without any problems.

In the next section, you will learn how  it's possible to test components using Mocha.

To see Jest in action we are going to create a project from scratch, installing all the dependencies and writing a component with some tests. It'll be fun!

The first thing to do is to move into a new folder and run:

npm init

Once the package.json is created we can start installing the dependencies, with the first one being the jest package itself:

npm install --save-dev jest

To tell npm that we want to use the jest command to run the tests, we have to add the following scripts to the package.json:

"scripts": ...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at ₹800/month. Cancel anytime
Banner background image