Seite - 1 - in The Future of Software Quality Assurance

Change-DrivenTesting SvenAmann and ElmarJürgens Abstract Today, testershaveto testever largeramountsofsoftware ineversmaller periodsof time.Thismakesit infeasibletosimplyexecuteentire testsuitesforevery change.Alsoithasbecomeimpractical—if iteverwas—tomanuallyensurethat the tests cover all changes. In response to this challenge, we propose Change-Driven Testing.Change-DrivenTestingusesTest-ImpactAnalysis toautomaticallyfindthe relevant tests for any given code change and sort them in a way that increases the chance of catching mistakes early on. This makes testing more efficient, catching over90%ofmistakes inonly2%testing time.Furthermore,Change-DrivenTesting uses Test-Gap Analysis to automatically identify test gaps, i.e., code changes that lack tests. This enables us to make conscious decisions about where to direct our limited testing resource to improve our testing effectiveness and notifies us about wherewe aremissing regression tests. Keywords Software testing · Test automation · Test intelligence · Regression-test selection · Testprioritization · Test-resourcemanagement · Risk management 1 AVicious Circle Today, testershaveto testever largeramountsofsoftware ineversmallerperiodsof time.This isnotonlybecausesoftwaresystemsgroweverlargerandmorecomplex, but also because development processes changed fundamentally. Ten years ago, software was commonly released at most once or twice a year and only after an extensivetestperiodof theoverallsystem.Today,weseeconsecutivefeature-driven releases within a few months, weeks, or even days. To enable this, development happensonparallel featurebranches,and testing,consequently,needs tohappenon eachsuchbranchaswell ason theoverall system. S.Amann ·E. Jürgens CQSE GmbH,München, Germany ©The Author(s) 2020 S.Goericke (ed.), The Future of Software QualityAssurance, https://doi.org/10.1007/978-3-030-29509-7_1 1