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- Vassalo, Carmine (author), Panichella, Sebastiano (author), Palomba, F. (author), Proksch, Sebastian (author), Zaidman, A.E. (author), Gall, Harald C. (author) conference paper 2018
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Rodriguez Perez, G. (author), Zaidman, A.E. (author), Serebrenik, Alexander (author), Robles, Gregorio (author), Gonzalez-Barahona, Jesus M. (author)Background: Many studies in the software research literature on bug fixing are built upon the assumption that "a given bug was introduced by the lines of code that were modified to fix it", or variations of it. Although this assumption seems very reasonable at first glance, there is little empirical evidence supporting it. A careful examination...conference paper 2018
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Soltani, M. (author), Derakhshanfar, P. (author), Panichella, A. (author), Devroey, Xavier (author), Zaidman, A.E. (author), van Deursen, A. (author)EvoCrash is a recent search-based approach to generate a test case that reproduces reported crashes. The search is guided by a fitness function that uses a weighted sum scalarization to combine three different heuristics: (i) code coverage, (ii) crash coverage and (iii) stack trace similarity. In this study, we propose and investigate two...conference paper 2018
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Beller, M.M. (author), Zaidman, A.E. (author), Karpov, Andrey (author), Zwaan, Rolf A. (author)Micro-clones are tiny duplicated pieces of code; they typically comprise only few statements or lines. In this paper, we study the “Last Line Effect,” the phenomenon that the last line or statement in a micro-clone is much more likely to contain an error than the previous lines or statements. We do this by analyzing 219 open source projects and...journal article 2017
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Chen, C. (author), Gross, H.G. (author), Zaidman, A.E. (author)Due to their loosely coupled and highly dynamic nature, service-oriented systems offer many benefits for realizing fault tolerance and supporting trustworthy computing. They enable automatic system reconfiguration when a faulty service is detected. Spectrum-based fault localization (SFL) is a statistics-based diagnosis technique that can be...journal article 2017
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- van Deursen, A. (author), Zaidman, A.E. (author), Aniche, Maurício (author), Mairet, V.A.P. (author), van den Oever, S.Y. (author) book 2017
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Zhu, Q. (author), Panichella, A. (author), Zaidman, A.E. (author)Mutation testing is widely considered as a high-end test criterion due to the vast number of mutants it generates. Although many efforts have been made to reduce the computational cost of mutation testing, its scalability issue remains in practice. In this paper, we introduce a novel method to speed up mutation testing based on state...conference paper 2017
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Heck, P.M. (author), Zaidman, A.E. (author)Until now, quality assessment of requirements has focused on traditional up-front requirements. Contrasting these traditional requirements are just-in-time (JIT) requirements, which are by definition incomplete, not specific and might be ambiguous when initially specified, indicating a different notion of "correctness." We analyze how the...journal article 2017
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Beller, M.M. (author), Gousios, G. (author), Zaidman, A.E. (author)AbContinuous Integration (CI) has become a best practice of modern software development. Yet, at present, we have a shortfall of insight into the testing practices that are common in CI-based software development. In particular, we<br/>seek quantifiable evidence on how central testing is to the CI process, how strongly the project language...conference paper 2017
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Palomba, F. (author), Zaidman, A.E. (author), Oliveto, Rocco (author), De Lucia, Andrea (author)Refactoring aims at improving the internal structure of a software system without changing its external behavior. Previous studies empirically assessed, on the one hand, the benefits of refactoring in terms of code quality and developers’<br/>productivity, and on the other hand, the underlying reasons that push programmers to apply refactoring....conference paper 2017
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Beller, M.M. (author), Gousios, G. (author), Zaidman, A.E. (author)Continuous Integration (CI) has become a best practice of modern software development. Thanks in part to its tight integration with GitHub, Travis CI has emerged as arguably the most widely used CI platform for Open-Source Software (OSS) development. However, despite its prominent role in Software Engineering in practice, the benefits, costs,...conference paper 2017
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Di Nucci, D. (author), Palomba, F. (author), Prota, Antonio (author), Panichella, A. (author), Zaidman, A.E. (author), De Lucia, Andrea (author)Energy efficiency is a vital characteristic of any mobile application, and indeed is becoming an important factor for user satisfaction. For this reason, in recent years several approaches and tools for measuring the energy consumption of mobile devices have been proposed. Hardware-based solutions are highly precise, but at the same time they...conference paper 2017
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Catolino, G. (author), Palomba, F. (author), De Lucia, Andrea (author), Ferrucci, Filomena (author), Zaidman, A.E. (author)Predicting the areas of the source code having a higher likelihood to change in the future is a crucial activity to allow developers to plan preventive maintenance operations such as refactoring or peer-code reviews. In the past the research community was active in devising change prediction models based on structural metrics extracted from the...conference paper 2017
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Di Nucci, D. (author), Palomba, F. (author), Prota, Antonio (author), Panichella, A. (author), Zaidman, A.E. (author), De Lucia, Andrea (author)Modeling the power profile of mobile applications is a crucial activity to identify the causes behind energy leaks. To this aim, researchers have proposed hardware-based tools as well as model-based and software-based techniques to approximate the actual energy profile. However, all these solutions present their own advantages and disadvantages....conference paper 2017
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Vassallo, Carmine (author), Schermann, Gerald (author), Zampetti, Fiorella (author), Romano, D. (author), Leitner, Philipp (author), Zaidman, A.E. (author), Di Penta, Massimiliano (author), Panichella, Sebastiano (author)Continuous Integration (CI) and Continuous Delivery (CD) are widespread in both industrial and open-source software (OSS) projects. Recent research characterized build failures in CI and identified factors potentially correlated to them. However, most observations and findings of previous work are exclusively based on OSS projects or data from a...conference paper 2017
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Buckers, Tim (author), Cao, Clinton (author), Doesburg, Michiel (author), Gong, Boning (author), Wang, Sunwei (author), Beller, M.M. (author), Zaidman, A.E. (author)Automated Static Analysis Tools (ASATs) are an integral part of today’s software quality assurance practices. At present, a plethora of ASATs exist, each with different strengths. However, there is little guidance for developers on which of these ASATs to choose and combine for a project. As a result, many projects still only employ one ASAT...conference paper 2017
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Palomba, F. (author), Di Nucci, D. (author), Panichella, A. (author), Zaidman, A.E. (author), De Lucia, Andrea (author)Code smells are symptoms of poor design solutions applied by programmers during the development of software systems. While the research community devoted a lot of effort to studying and devising approaches for detecting the traditional code smells defined by Fowler, little knowledge and support isavailable for an emerging category of Mobile app...conference paper 2017
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Vassalo, Carmine (author), Zampetti, Fiorelli (author), Romano, D. (author), Beller, M.M. (author), Panichella, A. (author), Di Penta, Massimiliano (author), Zaidman, A.E. (author)Continuous Delivery is an agile software develop- ment practice in which developers frequently integrate changes into the main development line and produce releases of their software. An automated Continuous Integration infrastructure builds and tests these changes. Claimed advantages of CD include early discovery of (integration) errors,...conference paper 2016
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Palomba, F. (author), Panichella, A. (author), Zaidman, A.E. (author), Oliveto, Rocco (author)Test case generation tools that optimize code coverage have been extensively investigated. Recently, researchers have suggested to add other non-coverage criteria, such as mem- ory consumption or readability, to increase the practical use- fulness of generated tests. In this paper, we observe that test code quality metrics, and test cohesion and...conference paper 2016
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Panichella, Sebastiano (author), Panichella, A. (author), Beller, M.M. (author), Zaidman, A.E. (author), Gall, Harald C. (author)Automated test generation tools have been widely investigated with the goal of reducing the cost of testing activities. However, generated tests have been shown not to help developers in detecting and finding more bugs even though they reach higher structural coverage compared to manual testing. The main reason is that generated tests are...conference paper 2016