Jasmine is a JavaScript testing framework and test runner designed for behavior-driven development. It provides a comprehensive toolset for writing and executing descriptive test suites that verify code behavior in both web browsers and Node.js environments.
The framework is distinguished by its integrated mocking library, which allows for dependency isolation through spies and stubs, as well as the ability to simulate time and timing functions to test asynchronous logic synchronously. It also includes a mechanism to enforce test uniqueness, preventing duplicate names for tests and suites.
Its broader capabilities cover asynchronous code validation, cross-platform execution, and hierarchical test organization. The system includes programmable event-driven reporting, a pluggable matcher-based assertion system, and parallel test execution to reduce total runtime.
