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Enzyme

JavaScript Testing utilities for React, by Airbnb
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What is Enzyme?

Enzyme is a JavaScript Testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output.
Enzyme is a tool in the Javascript Testing Framework category of a tech stack.
Enzyme is an open source tool with 18.5K GitHub stars and 2K GitHub forks. Here鈥檚 a link to Enzyme's open source repository on GitHub

Who uses Enzyme?

Companies
88 companies reportedly use Enzyme in their tech stacks, including Airbnb, StyleShare Inc., and Redox Engine.

Developers
169 developers on StackShare have stated that they use Enzyme.

Enzyme Integrations

Why developers like Enzyme?

Here鈥檚 a list of reasons why companies and developers use Enzyme
Top Reasons
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Enzyme Reviews

Here are some stack decisions, common use cases and reviews by companies and developers who chose Enzyme in their tech stack.

Russel Werner
Russel Werner
Lead Engineer at StackShare | 6 upvotes 88.4K views
atStackShareStackShare
Jest
Jest
Enzyme
Enzyme
React Storybook
React Storybook
Happo.io
Happo.io
Percy
Percy

We use Jest because when we rebooted our "front end" stack earlier last year, we need to have a testing solution (we didn't have any front-end tests before that!). Jest is fast and convenient and it has plenty of community support behind it. It let's us run our unit tests with Enzyme and snapshot tests.

This is an area that we are constantly reviewing to see what can be improved, both in terms of developer needs, accuracy, test maintainability, and coverage.

I'm currently exploring using React Storybook to be the record of snapshot tests and using some online services, such as Happo.io and Percy in our CI pipeline.

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Dschinkel Schinkel
Dschinkel Schinkel
Mocha
Mocha
Jest
Jest
JavaScript
JavaScript
React
React
Enzyme
Enzyme
#Tdd
#Bdd
#Testdrivendevelopment

I use both mocha and Jest because:

  • I don't care whether teams use Jest or Mocha. But jest is way too overhyped. Most devs are writing integration tests and think that it's so much better but frankly I don't write integration tests as the way to get both design feedback and confidence when I code. I adhere to the test pyramid, not ice cream cone or the dumb "trophy"

  • I TDD, so I only ever use the "API" of test frameworks. I don't do a lot of integration tests for TDD and all the bells and whistles Jest provides you from the command-line I just don't need. And I certainly do not care about or touch Jest Snapshots, I despise them

  • My tests are fast enough because I write isolated tests with TDD, so I don't run into performance issues. Example: I write my tests in a way that I can run 300 tests in literally 1 second with mocha. So the Jest ability to pinpoint and only run those tests which are affected by code changes. I want to run all of them every time when I TDD. It's a different mindset when you TDD

  • I also mainly code in IntelliJ or WebStorm because I feel the tools in that IDE far surpass VSCode and I also love running the test UI runner in it vs. lousy command-line

  • I feel both mocha and Jest read just fine in terms of code readability. Jest might have shorter assertion syntax but I don't really care. I just care that I can read the damn test and my tests are written well and my test descriptions, as well as the code itself including constants represent business language, not technical. I care most about BDD, clean code, 4 rules of simple design, and SOLID

  • I don't like using mock frameworks so no I don't use Jest's Mocking framework. I don't have to mock a lot in my tests due to the nature of how I strive to code...I keep my design simple and modular using principals such as clean code and 4 rules of simple design. If I must mock, I create very simple custom mocks with JS

  • On the contrary to the belief that integration tests and mount are the way to go (this belief drives me absolutely crazy, especially Dodd's promoting that), I TDD with shallow & enzyme. My tests are simple. My design is driven by my tests and my tests give me quick and useful feedback. I have a course I'm working on coming out soon on TDD with React to show you how to truly test the FE and why the ice cream cone and trophy suck (you're being scammed people). Watch for that here: https://twitter.com/DaveSchinkel/status/1062267649235791873

Don't forget to upvote this post!

Mocha Jest JavaScript React @jsdom Enzyme #tdd #bdd #testdrivendevelopment

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Gustavo Mu帽oz
Gustavo Mu帽oz
Web UI Developer at Globant | 1 upvotes 2.7K views
Jest
Jest
Enzyme
Enzyme

I really enjoy using Jest as my testing framework. I also use Enzyme to complement, and both together are amazing. Jest is fast and easy to use, It has all you need together under the same tool, and it's pretty easy to create all kind of test, even asynchronous ones. I was responsible for implant it in our company projects, and it was the best decision for testing.

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Enzyme Alternatives & Comparisons

What are some alternatives to Enzyme?
react-testing-library
It is a simple and complete React DOM testing utility that encourage good testing practices. It provides light utility functions on top of react-dom and react-dom/test-utils, in a way that encourages better testing practices.
Mocha
Mocha is a feature-rich JavaScript test framework running on node.js and the browser, making asynchronous testing simple and fun. Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases.
Jest
Jest provides you with multiple layers on top of Jasmine.
Jasmine
Jasmine is a Behavior Driven Development testing framework for JavaScript. It does not rely on browsers, DOM, or any JavaScript framework. Thus it's suited for websites, Node.js projects, or anywhere that JavaScript can run.
Cypress
Cypress is a front end automated testing application created for the modern web. Cypress is built on a new architecture and runs in the same run-loop as the application being tested. As a result Cypress provides better, faster, and more reliable testing for anything that runs in a browser. Cypress works on any front-end framework or website.
See all alternatives

Enzyme's Followers
190 developers follow Enzyme to keep up with related blogs and decisions.
Balaji Arun
Manish  Thakur
Rudy Aldair Rocha Gonz谩lez
Matthias Heyman
G谩bor Varga
Raksit Mantanacharu
Saurabh Awasthi
Ricardo Neftali Lazcano Calixto
Christian Fleschhut
脕kos Szabacsi