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This article mainly explains "what testing framework does JavaScript have". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what testing frameworks JavaScript has.

1 、 Jest

Jest is the JavaScript testing framework built and maintained by the Facebook team and the JavaScript unit testing framework based on Jasmine. Jest was very popular in 2018, especially in the JavaScript community this year, with more than 1.5 million projects using Jest, according to Github.

The proportion of users who continue to use Jest has soared from 39% to 61% in the past year, a cyclical growth rate that has been growing from 2017 to 2018, but the proportion of people interested in Jest has also declined, from 29% to 22%.

2 、 Mocha

Mocha is one of the most widely used JavaScript testing frameworks in recent years. In addition to the huge ecosystem, Mocha has complete documentation for reference. Mocha is very flexible and supports many extensions, and according to Github, Mocha has been used by more than 900,000 projects.

According to the survey, the proportion of users who continue to use Mocha has soared from 39% to 42% in the past year, and about 8% of respondents have not heard of Mocha.

3 、 Storybook

Storybook is a development environment for UI components. Through it, users can view the different states of each component, develop and test components interactively, and it has a large user base on Github. The user retention rate of Storybook doubled from 15% to 32% in 2019, and the number of users interested in it increased from 23% to 26%.

4 、 Cypress

Cypress is a fast and reliable JavaScript testing tool, which basically injects tests into Web applications. Cypress also provides a clear documentation. At present, Cypress's biggest competitor is a testing framework called TestCafe.

According to Github data, there are more than 25000 users using Cypress, and the user retention rate is 23%.

5 、 Enzyme

Enzyme, from airbnb, is a JavaScript testing tool for React that makes it easy for you to judge, manipulate and traverse React Components output.

Enzyme's API makes DOM operation and ergodic very flexible and intuitive by imitating jQuery's API. Enzyme is compatible with all major test runners and decision libraries, documentation and examples using mocha and chai. In 2019, Enzyme's user retention rate increased from 20% to 23%.

6 、 Ava

Ava is a simple test library, and AVA has a concise API. Its biggest advantage is the asynchronous nature of Java and the concurrent running of tests, which in turn improves performance. According to GitHub, it is currently used by 47000 projects, and last year, about 72% of JavaScript developers heard of Ava. This year, that number has fallen to 69%, but the user retention rate has risen to 5%.

7 、 Jasmine

Jasmine is a JavaScript testing framework that does not rely on any other JavaScript components, so it is suitable for websites, Node.js projects, or any place where JavaScript can be run. According to the survey, the user retention rate of Jasmine increased slightly in 2019, but there is still a gap compared with other frameworks.

8 、 Puppeteer

Puppeteer is an official Node library from Google that controls headless Chrome through the DevTools protocol. You can use the api provided by Puppeteer to directly control Chrome to simulate most user operations for UI Test or to access pages as crawlers to collect data.

According to the survey, the user retention rate of Puppeteer is 24.3%. Although more than 55000 projects are using Puppeteer, users still don't know enough about it.

Puppeteer and Cypress are new members this year, but they have become strong rivals to testing frameworks such as Mocha, Jasmine, Jest, and so on. Ninety-six per cent of Jest users are repeat customers.

At this point, I believe you have a deeper understanding of "what testing framework JavaScript has". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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