testdouble.js is a test double library for JavaScript, providing a flexible and powerful alternative to traditional mocking frameworks. It focuses on behavioral verification, allowing developers to define expectations for how code interacts and ensuring those expectations are met during testing. With a clean API and comprehensive features like argument capturing and stubbing, testdouble.js simplifies the creation of robust and maintainable tests for JavaScript applications. It emphasizes a 'double-first' approach, encouraging the design of testable and modular code.
