NDLI: A safe regression test selection technique for database-driven applications

Content Provider	IEEE Xplore Digital Library
Author	Willmor, D. Embury, S.M.
Copyright Year	2005
Description	Author affiliation: Sch. of Comput. Sci., Manchester Univ., UK (Willmor, D.; Embury, S.M.)
Abstract	Regression testing is a widely-used method for checking whether modifications to software systems have adversely affected the overall functionality. This is potentially an expensive process, since test suites can be large and time-consuming to execute. The overall costs can be reduced if tests that cannot possibly be affected by the modifications are ignored. Various techniques for selecting subsets of tests for re-execution have been proposed, as well as methods for proving that particular test selection criteria do not omit relevant tests. However, current selection techniques are focused on identifying the impact of modifications on program state. They assume that the only factor that can change the result of a test case is the set of input values given for it, while all other influences on the behavior of the program (such as external interrupts or hardware faults) will be constant for each re-execution of the test. This assumption is impractical in the case of an important class of software system, i.e. systems which make use of an external persistent state, such as a database management system, to share information between application invocations. If applied naively to such systems, existing regression test selection algorithms will omit certain test cases which could in fact be affected by the modifications to the code. In this paper, we show why this is the case, and propose a new definition of safety for regression test selection that takes into account the interactions of the program with a database state. We also present an algorithm and associated tool that safely performs test selection for database-driven applications, and (since efficiency is an important concern for test selection algorithms) we propose a variant that defines safety in terms of database state alone. This latter form of safety allows more efficient regression testing to be performed for applications in which program state is used only as a temporary holding space for data from the database. The claims of increased efficiency of both forms of safety are supported by the results of an empirical comparison with existing techniques.
Sponsorship	Univ. of Szeged
Starting Page	421
Ending Page	430
File Size	520678
Page Count	10
File Format	PDF
ISBN	0769523684
ISSN	10636773
DOI	10.1109/ICSM.2005.15
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-26
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Databases System testing Safety Application software Software systems Costs Performance evaluation Computer science Software testing Hardware
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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