Testdouble
Testdouble is a JavaScript testing library that provides test doubles (mocks, stubs, spies, and fakes) to isolate units of code during testing. It helps developers create clean, maintainable tests by replacing dependencies with controlled substitutes, making it easier to verify interactions and behaviors in complex systems. The library is designed to be simple and intuitive, reducing boilerplate code and improving test readability.
Developers should use Testdouble when writing unit tests in JavaScript or TypeScript projects to mock external dependencies like APIs, databases, or other modules, ensuring tests focus on specific logic without side effects. It's particularly useful in test-driven development (TDD) and behavior-driven development (BDD) workflows, as it allows for precise control over test scenarios and helps catch bugs early by simulating edge cases and failures.