Test-driven development

Software design using test cases / From Wikipedia, the free encyclopedia

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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.

Test-driven development is related to the test-first programming concepts of extreme programming, begun in 1999,[1] but more recently has created more general interest in its own right.[2]

Programmers also apply the concept to improving and debugging legacy code developed with older techniques.[3]

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