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Mocha

Simple, flexible, fun javascript test framework for node.js & the browser
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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 GitHub stars and GitHub forks. Here’s a link to Mocha's open source repository on GitHub

Who uses Mocha?

Companies
681 companies reportedly use Mocha in their tech stacks, including Accenture, Coursera, and Intuit.

Developers
2810 developers on StackShare have stated that they use Mocha.

Mocha Integrations

Karma, React.js Boilerplate, LambdaTest, CrossBrowserTesting , and Allure Report are some of the popular tools that integrate with Mocha. Here's a list of all 9 tools that integrate with Mocha.
Pros of Mocha
137
Open source
102
Simple
81
Promise support
48
Flexible
29
Easy to add support for Generators
12
For browser and server testing
7
Curstom assertion libraries
5
Works with Karma
3
No other better tools
1
Simple setup
1
Works with saucelabs
1
Lots of tutorials and help online
1
Default reporter is nice, clean, and itemized
1
Works with BrowserStack
1
Simple integration testing
Decisions about Mocha

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

Anurag Maurya
Needs advice
on
ExpressJSExpressJSJavaScriptJavaScript
and
Node.jsNode.js

Needs advice on code coverage tool in Node.js/ExpressJS with External API Testing Framework

Hello community,

I have a web application with the backend developed using Node.js and Express.js. The backend server is in one directory, and I have a separate API testing framework, made using SuperTest, Mocha, and Chai, in another directory. The testing framework pings the API, retrieves responses, and performs validations.

I'm currently looking for a code coverage tool that can accurately measure the code coverage of my backend code when triggered by the API testing framework. I've tried using Istanbul and NYC with instrumented code, but the results are not as expected.

Could you please recommend a reliable code coverage tool or suggest an approach to effectively measure the code coverage of my Node.js/Express.js backend code in this setup?

See more
Needs advice
on
axiosaxios
and
SuperTestSuperTest

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
14
13633
JavaScriptGitGitHub+33
20
2141

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.
Git
Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.
GitHub
GitHub is the best place to share code with friends, co-workers, classmates, and complete strangers. Over three million people use GitHub to build amazing things together.
See all alternatives

Mocha's Followers
2924 developers follow Mocha to keep up with related blogs and decisions.