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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.
Chai is a tool in the Javascript Testing Framework category of a tech stack.
Chai is an open source tool with 7.4K GitHub stars and 674 GitHub forks. Here’s a link to Chai's open source repository on GitHub

Who uses Chai?

Companies
57 companies reportedly use Chai in their tech stacks, including Lunchbox, The Lonero Foundation, and QualityMinds GmbH.

Developers
187 developers on StackShare have stated that they use Chai.

Chai Integrations

Decisions about Chai

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

Joshua Dean Küpper
CEO at Scrayos UG (haftungsbeschränkt) · | 6 upvotes · 115.1K views

For our internal team and collaboration panel we use Nuxt.js (with TypeScript that is transpiled into ES6), Webpack and npm. We enjoy the opinionated nature of Nuxt.js over vanilla Vue.js, as we would end up using all of the components Nuxt.js incorporates anyways and we can adhere to the conventions setup by the Nuxt.js project, which allows us to get better support in case we run into any dead ends. Webpack allows us to create reproducable builds and also debug our application with hot reloads, which greately increased the pace at which we are able to perform and test changes. We also incorporated a lot of testing (ESLint, Chai, Jasmine, Nightwatchjs) into our pipelines and can trigger those jobs through GitLab CI. All packages are fetched through npm, so that we can keep our git repositories slim and are notified of new updates aswell as reported security flaws.

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Jobs that mention Chai as a desired skillset

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Chai Alternatives & Comparisons

What are some alternatives to Chai?
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.
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.
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Chai's Followers
152 developers follow Chai to keep up with related blogs and decisions.