Jasmine vs Jest vs Mocha





Jasmine vs Jest vs Mocha: What are the differences?

There are JavaScript frameworks out there that assist in active Web development. Let us compare three frameworks that can help in web development immensely. Jasmine is an open source testing framework for JavaScript that aims to run on any JavaScript-enabled platform. Jasmine is influenced from other testing frameworks such as ScrewUnit, JSSpec, JSpec, and Spec. Mocha is a framework with a simple setup for Node.js programs. It has an assertion library that throws exceptions on failure, offers lot of plugins and is highly extensible. Jest is a Javascript testing framework as well, with a focus on providing a simple framework to the users. It works seamlessly with projects using Babel, TypeScript, Node.js, React, Angular, and Vue.js. Jasmine so far is missing a test runner whereas Mocha has a testrunner support equipped with an API for setting up the test suite. Jest, on the other hand, has an intelligent execution of tests and snapshots that can happen parallelly.

What is 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.

What is Jest?

Jest provides you with multiple layers on top of Jasmine.

What is 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.

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    What are some alternatives to Jasmine, Jest, and Mocha?
    Karma is not a testing framework, nor an assertion library. Karma just launches a HTTP server, and generates the test runner HTML file you probably already know from your favourite testing framework. So for testing purposes you can use pretty much anything you like.
    Enzyme is a JavaScript Testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output.
    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.
    Protractor is an end-to-end test framework for Angular and AngularJS applications. Protractor runs tests against your application running in a real browser, interacting with it as a user would.
    Even though JavaScript is single-threaded, IO in Node.js can happen in parallel due to its async nature. AVA takes advantage of this and runs your tests concurrently, which is especially beneficial for IO heavy tests. In addition, test files are run in parallel as separate processes, giving you even better performance and an isolated environment for each test file.
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    What tools integrate with Jasmine?
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          Decisions about Jasmine, Jest, and Mocha
          Dschinkel Schinkel
          Dschinkel Schinkel

          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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          Scott Mebberson
          Scott Mebberson
          CTO / Chief Architect at Idearium · | 2 upvotes · 17K views

          We used to Mocha for as our primary Node.js test framework. We've now switched to Jest and haven't looked back.

          Jest is faster and requires less setup and configuration. The Mocha API and eco-system is vast and verified, but that also brings complexity.

          It you want to get in, write tests, execute them and get out, try Jest 😀

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          Jack Graves
          Jack Graves
          Head of Product Development at Automation Consultants · | 3 upvotes · 920 views
          atAutomation ConsultantsAutomation Consultants
          Apache JMeter

          We use JUnit and Jest to perform the bulk of our automated test scenarios, with additional work with Apache JMeter for performance testing - for example, the Atlassian Data Center compliance testing is performed with JMeter. Jest provides testing for the React interfaces, which make up the backend of our App offerings. JUnit is used for Unit Testing our Server-based Apps. Mocha is another tool we use.

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          Interest over time
          Reviews of Jasmine, Jest, and Mocha
          Avatar of cristiangiagante
          .Net Developer at Hexacta
          Review ofJestJest

          I'm using Jest for 3 months in a Vue JS project . I need to use a lot of custom search of related topics in jest docs because it's not clear. The examples are very poor too.

          How developers use Jasmine, Jest, and Mocha
          Avatar of Volkan Özçelik
          Volkan Özçelik uses JestJest

          Jest is my unit-testing tool of choice.

          Almost all unit testing suites (Mocha, Jasmine, etc.) are more or less the same.

          The main advantage I guess, is that it integrates pretty well with React and Enzyme.

          Avatar of Matt Welke
          Matt Welke uses MochaMocha

          Used for unit testing when working with Node.js. Used over other testing frameworks because of good compatibility with TypeScript and ts-node.

          Avatar of Kang Hyeon Ku
          Kang Hyeon Ku uses MochaMocha

          javascript 테스트를 위해 써본 프레임워크 이다. 초반 유명한 프레임워크중 하나였는데 요즘은 너무 테스트 프레임워크도 다양해져 잘 모르겠다. junit 에게는 hamcrest 이 있다면 mocha 에게는 chai가 있다.

          Avatar of Dave Woolfenden
          Dave Woolfenden uses MochaMocha

          Is a feature-rich JavaScript test framework running on Node.js and in the browser supporting asynchronous testing.

          Avatar of RentChek
          RentChek uses JasmineJasmine

          We use Jasmine for all our front-end web interface tests. Works great for testing all our Angular components.

          Avatar of Ron Apelbaum
          Ron Apelbaum uses JasmineJasmine

          I write unit tests with Jasmine, and use nodejs Jasmine as a test runner.

          Avatar of Kingsley Victor
          Kingsley Victor uses MochaMocha

          Mocha is ideal for running tests on apis built with Node's Express

          Avatar of Tim De Lange
          Tim De Lange uses MochaMocha

          Unit testing on shared code between brow ser and back end.

          Avatar of Fred Steffen
          Fred Steffen uses JasmineJasmine

          It has tons of features, great documentation

          Avatar of Giovanni Candido da Silva
          Giovanni Candido da Silva uses JasmineJasmine

          Test tool for the interface code

          Avatar of Evan Luc
          Evan Luc uses JasmineJasmine

          Front and back-end tests.

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