Standalone and test framework agnostic JavaScript test spies, stubs and mocks.
Sinon.JS is a standalone JavaScript library that provides test spies, stubs, and mocks for unit testing. It helps developers isolate code by faking dependencies, controlling behavior, and verifying interactions in tests. The library is designed to be framework-agnostic, working seamlessly with any testing environment.
JavaScript developers writing unit tests who need to mock dependencies, control function behavior, or verify interactions in their code. It's particularly useful for those practicing test-driven development (TDD) or working with complex test scenarios.
Developers choose Sinon.JS for its comprehensive feature set, ease of integration, and lack of global pollution. Its standalone nature and built-in fakes for timers make it a versatile and powerful tool for creating reliable and maintainable tests.
Test spies, stubs and mocks for JavaScript.
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Offers spies, stubs, mocks, and fake timers in one package, covering all key testing needs as highlighted in the features list.
Works seamlessly with any testing framework without global pollution, ensuring flexibility and clean integration per the goals.
Requires minimal setup and embeds effortlessly into existing workflows, prioritizing ease of use as stated in the philosophy.
Includes ready-to-use utilities for mocking JavaScript timers like setTimeout and Date, simplifying time-dependent tests out of the box.
Documentation is hosted on a separate homepage, not within the README, which can make initial access and reference less convenient for developers.
For teams using testing frameworks like Jest that already include mocking features, Sinon adds an extra dependency that might be unnecessary.
Compatibility details are in a separate file (COMPATIBILITY.md), indicating potential issues or extra steps for cross-browser testing scenarios.