Ekstazi: Lightweight Test Selection

Milos Gligoric, Lamyaa Eloussi, Darko Marinov

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Regression testing is a crucial, but potentially time-consuming, part of software development. Regression test selection (RTS), which runs only a subset of tests, was proposed over three decades ago as a promising way to speed up regression testing. However, RTS has not been widely adopted in practice. We propose EKSTAZI , a lightweight RTS tool, that can integrate well with testing frameworks and build systems, increasing the chance for adoption. EKSTAZI tracks dynamic dependencies of tests on files and requires no integration with version-control systems. We implemented EKSTAZI for Java+JUnit and Scala+ScalaTest, and evaluated it on 615 revisions of 32 open-source projects (totaling almost 5M LOC). The results show that EKSTAZI reduced the end-to-end testing time by 32% on average compared to executing all tests. EKSTAZI has been adopted for day-to-day use by several Apache developers. The demo video for EKSTAZI can be found at http://www.youtube.com/watch?v=jE8K5 UCP28.

Original languageEnglish (US)
Title of host publicationProceedings - 2015 IEEE/ACM 37th IEEE International Conference on Software Engineering, ICSE 2015
PublisherIEEE Computer Society
Number of pages4
ISBN (Electronic)9781479919345
StatePublished - Aug 12 2015
Event37th IEEE/ACM International Conference on Software Engineering, ICSE 2015 - Florence, Italy
Duration: May 16 2015May 24 2015

Publication series

NameProceedings - International Conference on Software Engineering
ISSN (Print)0270-5257


Other37th IEEE/ACM International Conference on Software Engineering, ICSE 2015

ASJC Scopus subject areas

  • Software


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