Standalone and test framework agnostic JavaScript test spies, stubs and mocks (pronounced "sigh-non", named after Sinon, the warrior).

For details on compatibility and browser support, please see COMPATIBILITY.md

via npm

$ npm install sinon

or via Sinon's browser builds available for download on the homepage. There are also npm based CDNs one can use.

See the sinon project homepage for documentation on usage.

If you have questions that are not covered by the documentation, you can check out the sinon tag on Stack Overflow.

• No global pollution
• Easy to use
• Require minimal “integration”
• Easy to embed seamlessly with any testing framework
• Easily fake any interface
• Ship with ready-to-use fakes for timers

See CONTRIBUTING.md for details on how you can contribute to Sinon.JS. Artifact-first contract tests are used to protect public APIs during migration. The lib/ directory is generated build output and is not committed to the repository; run npm run build to regenerate it locally when needed.

Thank you to all our backers! 🙏 [Become a backer]

Become a sponsor and get your logo on our README on GitHub with a link to your site. [Become a sponsor]

Sinon.js was released under BSD-3