September 2017
Intermediate to advanced
528 pages
15h 53m
English
Content preview from React Quickly
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Chapter 16. Unit testing React with Jest
This chapter covers
- Reasons to use Jest
- Unit testing with Jest
- UI testing with Jest and TestUtils
In modern software engineering, testing is important. It’s at least as important as using Agile methods, writing well-documented code, and having enough coffee on hand—sometimes even more so. Proper testing will save you from many hours of debugging later. The code isn’t an asset, it’s a liability, so your goal is to make it as easy to maintain as possible.
Code is a liability?
Googling the phrase “Code isn’t an asset, it’s a liability” gives 191 million results, which makes it hard to pinpoint its origins. Although I can’t find an author, I can tell you the gist of the idea: when you write ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.