$ npm install sinon
See the sinon project homepage for documentation on usage.
If you have questions that are not covered by the documentation, you can check out thetag on Stack Overflow or drop by #sinon.js on irc.freenode.net:6667.
You can also search through the Sinon.JS mailing list archives.
See CONTRIBUTING.md for details on how you can contribute to Sinon.JS
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Sinon.js was released under BSD-3