Jest

Jest works out of the box for most JavaScript projects, as shown in the 'Getting Started' section where a simple test runs with just a package.json script.

Its fast, interactive watch mode only runs tests related to changed files, providing instant feedback during development, highlighted in the README's key features.

Includes snapshot testing for UI components and generates code coverage reports without additional tools, simplifying testing workflows.

Jest provides extensive mocking for functions, modules, and timers, making test isolation straightforward and efficient.