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Improving Class Firewall Regression Test Selection by Removing the Class Firewall

Publiceringsår: 2007
Språk: Engelska
Sidor: 359-378
Publikation/Tidskrift/Serie: International Journal of Software Engineering and Knowledge Engineering
Volym: 17
Nummer: 3
Dokumenttyp: Artikel i tidskrift
Förlag: World Scientific


One regression test selection technique proposed for object-oriented programs is the Class firewall regression test selection technique. The selection technique selects test cases for regression test, which test changed classes and classes that depend on changed classes. However, in empirical studies of the application of the technique, we observed that another technique found the same defects, selected fewer tests and required a simpler, less costly, analysis. The technique, which we refer to as the Change-based regression test selection technique, is basically the Class firewall technique, but with the class firewall removed. In this paper we formulate a hypothesis stating that these empirical observations are not incidental, but an nherent property of the Class firewall technique. We prove that the hypothesis holds for Java in a stable testing environment, and conclude that the effectiveness of the Class firewall regression testing technique can be improved without sacrifice the defect detection capability of the technique, by removing the class firewall.


  • Computer Science


  • Software Engineering-lup-obsolete
  • ISSN: 0218-1940

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