System under test: Difference between revisions

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'''System under test''' ('''SUT''') refers to a [[software system|system]] that is being tested for correct operation. According to [[ISTQB]] it is the test object.<ref>{{cite web|url=http://glossary.istqb.org/search/test%20object|title=ISTQB Glossary|website=glossary.istqb.org|accessdate=2018-02-05}}</ref><ref>{{cite web|url=https://robots.thoughtbot.com/don-t-stub-the-system-under-test|title=Don't Stub the System Under Test|website=robots.thoughtbot.com|accessdate=2018-02-05}}</ref><ref>{{cite web|url=https://www.itwissen.info/SUT-system-under-test.html|title=SUT (system under test)|website=www.itwissen.info|language=de|accessdate=2021-02-24}}</ref> The term is used mostly in [[software testing]].{{citation needed|date=March 2018}}

A special case of a software system is an [[application software|application]] which, when tested, is called an application under test.

The term SUT can also refer to a stage of maturity of the software because [[system testing]] is the successor of [[integration testing]] in the [[Software testing#Testing levels|testing cycle]].{{clarify |date=December 2017 |reason= maturity and testing cycle appears to refer to a phased-approach to SW development. The wording "stage of maturity of the software" might be replaced by "testing level of the software"...}}

== See also ==

* [[Device under test]]

* [[Test harness]]