
Chai
Ava
Enzyme
Karma
react-testing-library
Mochajs
EyeJS
Standalone test spies, stubs and mocks for JavaScript.

Omni Calculator
calculator.net
Build vs. Buy Calculator
DeveloperToolStack
DevNestTools
DevTools Advanced
DevTools.fit
Free, no-signup calculators for the money side of building software and freelancing
Which is more popular?
Based on our record, Sinon.JS seems to be more popular. It has been mentioned 25 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | sinonjs.org | devfinancetools.com |
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| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Sinon.JS yet.
DevFinanceTools is a collection of free, no-signup calculators for the money side of building software and freelancing. Everything runs in your browser — no account, no tracking beyond basic page-view analytics — and every tool shows its formulas and benchmarks so you can check the maths...
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
Sinon.js Tutorial - How to Use Sinon.js, the Mocking Library for Testing
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How often each product is chosen within a category, 0–100% relative to the other.


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Recommendations tracked on public social media and blogs since March 2021.


Virtual clocks / Fake timers: Libraries like Jest's fake timers or Sinon allow you to control setTimeout, setInterval, and other asynchronous scheduling, making tests deterministic. - Source: dev.to / 11 months ago
Now, we need to figure out how to test in general. To begin with, we will use Mocha, Sinon, and to generate C8 reports:. - Source: dev.to / over 1 year ago
Libraries like Sinon.JS provide robust support for stubs and spies, enabling precise control and inspection of your code's interactions. By favoring stubs and spies, you can keep your tests concise, easier to understand, and less prone... - Source: dev.to / almost 2 years ago
Tracking DevFinanceTools since Aug 2026.
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