Mocha logo

Mocha

Simple, flexible, fun javascript test framework for node.js & the browser

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.
Mocha is a tool in the Javascript Testing Framework category of a tech stack.
Mocha is an open source tool with 20.9K GitHub stars and 2.9K GitHub forks. Here’s a link to Mocha's open source repository on GitHub

Who uses Mocha?

Companies
624 companies reportedly use Mocha in their tech stacks, including Accenture, Coursera, and Asana.

Developers
2160 developers on StackShare have stated that they use Mocha.

Mocha Integrations

Karma, React.js Boilerplate, LambdaTest, CrossBrowserTesting , and Wallaby.js are some of the popular tools that integrate with Mocha. Here's a list of all 7 tools that integrate with Mocha.
Pros of Mocha
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
Decisions about Mocha

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

So far, I have worked on UI automation testing using the WebdriverIO+TypeScript+ Cucumber framework. Now my manager wants me to design a framework for API automation testing using TypeScript.

Could someone please suggest if it is ideal to use cucumber for API automation? If not, please provide the reasons. And also, please suggest the best npm packages, framework (Cucumber/ Mocha), API testing module - axios or SuperTest, report generation tool (Allure report or any other) that we can use for API automation testing.

See more

Blog Posts

JavaScriptGitHubNode.js+29
15
11502
JavaScriptGitHubGit+33
20
1713

Mocha's Features

  • browser support
  • simple async support, including promises
  • test coverage reporting
  • string diff support
  • javascript API for running tests
  • proper exit status for CI support etc
  • auto-detects and disables coloring for non-ttys
  • maps uncaught exceptions to the correct test case
  • async test timeout support
  • test-specific timeouts
  • growl notification support
  • reports test durations
  • highlights slow tests
  • file watcher support
  • global variable leak detection

Mocha Alternatives & Comparisons

What are some alternatives to Mocha?
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.
Jest
Jest provides you with multiple layers on top of Jasmine.
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.
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

Mocha's Followers
2595 developers follow Mocha to keep up with related blogs and decisions.