Jasmine
Jasmine is a behavior-driven development (BDD) testing framework for JavaScript that provides a clean, readable syntax for writing test cases. It runs in browsers and Node.js environments without requiring any external dependencies, making it easy to set up and integrate into JavaScript projects. The framework includes built-in tools for assertions, spies (for mocking), and asynchronous testing.
Developers should learn Jasmine when they need a simple, standalone testing solution for JavaScript code, particularly for unit testing front-end applications, Node.js backends, or libraries. It's ideal for projects that prioritize readability and minimal configuration, as its BDD-style syntax (using describe, it, expect) makes tests self-documenting and easy to maintain. Use cases include testing Angular applications (where it's commonly paired with Karma) or any JavaScript project requiring reliable test automation.