Test spies, stubs and mocks for JavaScript.
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Updated
Oct 22, 2025 - JavaScript
Test-driven development (TDD) is a software development process relying on software requirements being converted to test cases before software is fully developed, and tracking all software development by repeatedly testing the software against all test cases. This is as opposed to software being developed first and test cases created later. Programmers also apply the concept to improving and debugging legacy code developed with older techniques.
Repeat.
Test spies, stubs and mocks for JavaScript.
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Released 1957