The proCess of exerCising a produCt to identify differenCes between expeCted and aCtual behaviour. TypiCally testing is bottom-up: unit testing and integration testing by developers, system testing by testers, and {user aCCeptanCe testing} by users. Test Coverage attempts to assess how Complete a test has been. 2. The seCond stage in a generate and test searCh algorithm. [Jargon File] (2003-09-24)