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Chai

634
152
+ 1
0
Mocha

3.6K
2.6K
+ 1
425
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Chai vs Mocha: What are the differences?

Chai: A BDD / TDD assertion library. It is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework. It has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a more classical feel; Mocha: Simple, flexible, fun javascript test framework for node.js & the browser. 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.

Chai and Mocha can be categorized as "Javascript Testing Framework" tools.

Chai and Mocha are both open source tools. It seems that Mocha with 18.1K GitHub stars and 2.44K forks on GitHub has more adoption than Chai with 6.39K GitHub stars and 575 GitHub forks.

Coursera, Asana, and Typeform are some of the popular companies that use Mocha, whereas Chai is used by BeatSense, Brainhub, and Clovis. Mocha has a broader approval, being mentioned in 400 company stacks & 272 developers stacks; compared to Chai, which is listed in 6 company stacks and 8 developer stacks.

Decisions about Chai and Mocha

We use Mocha for our FDA verification testing. It's integrated into Meteor, our upstream web application framework. We like how battle tested it is, its' syntax, its' options of reporters, and countless other features. Most everybody can agree on mocha, and that gets us half-way through our FDA verification and validation (V&V) testing strategy.

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Pros of Chai
Pros of Mocha
    Be the first to leave a pro
    • 136
      Open source
    • 100
      Simple
    • 81
      Promise support
    • 48
      Flexible
    • 28
      Easy to add support for Generators
    • 12
      For browser and server testing
    • 7
      Curstom assertion libraries
    • 4
      Works with Karma
    • 3
      No other better tools
    • 1
      Simple integration testing
    • 1
      Default reporter is nice, clean, and itemized
    • 1
      Simple setup
    • 1
      Works with saucelabs
    • 1
      Lots of tutorials and help online
    • 1
      Works with BrowserStack

    Sign up to add or upvote prosMake informed product decisions

    Cons of Chai
    Cons of Mocha
      Be the first to leave a con
      • 3
        Cannot test a promisified functions without assertion
      • 1
        No assertion count in results
      • 1
        Not as many reporter options as Jest

      Sign up to add or upvote consMake informed product decisions

      What is Chai?

      It is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework. It has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a more classical feel.

      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.

      Need advice about which tool to choose?Ask the StackShare community!

      What companies use Chai?
      What companies use Mocha?
      See which teams inside your own company are using Chai or Mocha.
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      Sign up to get full access to all the companiesMake informed product decisions

      What tools integrate with Chai?
      What tools integrate with Mocha?

      Sign up to get full access to all the tool integrationsMake informed product decisions

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      What are some alternatives to Chai and Mocha?
      Matcha
      Matcha is a package for building iOS and Android applications and frameworks in Go. Matcha provides a UI component library similar to ReactNative and exposes bindings to Objective-C and Java code through reflection. The library also provides Go APIs for common app tasks.
      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.
      SinonJS
      It is a really helpful library when you want to unit test your code. It supports spies, stubs, and mocks. The library has cross browser support and also can run on the server using Node.js.
      See all alternatives