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Title:Automated Testing of Refactoring Engines
Author(s):Daniel, Brett; Dig, Danny; Garcia, Kely; Marinov, Darko
Subject(s):computer science
Abstract:Refactorings are behavior-preserving program transformations that improve the design of a program. Refactoring engines are tools that automate the application of refactorings: first the user chooses a refactoring to apply, then the engine checks if the change is safe, and if so, transforms the program. Refactoring engines are a key component of modern IDEs, and programmers rely on them to perform refactorings. A fault in the refactoring engine can have severe consequences as it can erroneously change large bodies of source code and lead to strenuous debugging sessions. We present a technique for automated testing of refactoring engines. Test inputs for refactoring engines are programs. The core of our technique is a framework for iterative generation of structurally complex test inputs. We instantiate the framework to generate abstract syntax trees that represent Java programs. We also create several kinds of oracles to automatically check that the refactoring engine transformed the generated program correctly. We have applied our technique to testing Eclipse and NetBeans, two popular open-source IDEs for Java, and we have exposed new faults in both: 9 faults in Eclipse and 10 faults in NetBeans.
Issue Date:2007-03
Genre:Technical Report
Type:Text
URI:http://hdl.handle.net/2142/11304
Other Identifier(s):UIUCDCS-R-2007-2834
Rights Information:You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the University of Illinois at Urbana-Champaign Computer Science Department under terms that include this permission. All other rights are reserved by the author(s).
Date Available in IDEALS:2009-04-21


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