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Regression Test Reduction for Object-Oriented software: A Control Call Graph Based Technique and Associated Tool

International Scholarly Research Notices 2013年第1期2013卷

作者： Nicolas Frechette Linda Badri Mourad Badri Software Engineering Research Laboratory Department of Mathematics and Computer Science University of Quebec Trois-Rivières QC Canada G9A 5H7uquebec.ca

This paper presents a selective regression testing technique and an associated tool for object-oriented software. The technique is based on the concept of Control Call Graphs, which are a reduced form of traditional Control Flow Graphs . It uses static analysis of the source code of the program. The developed tool (1) identifies the Control Call Paths potentially impacted by changes, (2) selects, from an existing test suite, the appropriate test cases, and (3) generates new JUnit test cases for control call paths that are not covered by existing tests (new ones, or those whose structure has been modified after changes). In this way, the approach supports an incremental update of the test suite. The selected JUnit test cases, including the new ones, are automatically executed. Three concrete case studies are reported to provide evidence of the feasibility of the approach and its benefits in terms of reduction of regression testing effort.

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A recursive local linear estimator for identification of nonlinear ARX systems

A recursive local linear estimator for identification of non...

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Universite Libre de Bruxelles

作者： Zhao, Wen-Xiao Zheng, Wei Xing Bai, Er-Wei Key Laboratory of Systems and Control Academy of Mathematics and Systems Science CAS Beijing China National Center for Mathematics and Interdisciplinary Sciences CAS Beijing China School of Computing Engineering and Mathematics University of Western Sydney Penrith NSW 2751 Australia Department of Electrical and Computer Engineering University of Iowa Iowa City IA 52242 United States

In this work, we propose a recursive local linear estimator (RLLE) for identification of nonlinear autoregressive systems with exogenous inputs, along with an analysis of its strong consistency and asymptotical mean s... 详细信息

ISBN: (纸本)9783902823069

关键词： Mean square error

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Comparing six modeling approaches

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Workshops and Symposia on Models in software engineering, MODELS 2011

作者： Mussbacher, Gunter Al Abed, Wisam Alam, Omar Ali, Shaukat Beugnard, Antoine Bonnet, Valentin Bræk, Rolv Capozucca, Alfredo Cheng, Betty H.C. Fatima, Urooj France, Robert Georg, Geri Guelfi, Nicolas Istoan, Paul Jézéquel, Jean-Marc Kienzle, Jörg Klein, Jacques Lézoray, Jean-Baptiste Malakuti, Somayeh Moreira, Ana Phung-Khac, An Troup, Lucy Department of Systems and Computer Engineering Carleton University Canada Software Engineering Laboratory McGill University Montreal Canada Simula Research Laboratory Norway Département Informatique TELECOM Bretagne France Department of Telematics Norwegian University of Science and Technology Norway LASSY Research Team University of Luxembourg Luxembourg Department of Computer Science and Engineering Michigan State University United States Computer Science Department Colorado State University Fort Collins United States ISC Department CRP Gabriel Lippmann Luxembourg INRIA Centre Rennes - Bretagne Atlantique Rennes France Laboratory for Advanced Software Systems University of Luxembourg Luxembourg Software Engineering Group University of Twente Netherlands Universidade Nova de Lisboa Lisbon Portugal Department of Psychology Colorado State University Fort Collins United States

ISBN: (纸本)9783642296444

While there are many aspect-oriented modeling (AOM) approaches, from requirements to low-level design, it is still difficult to compare them and know under which conditions different approaches are most applicable. This comparison, however, is crucially important to unify existing AOM and more traditional object-oriented modeling (OOM) approaches and to generalize individual approaches into a comprehensive end-to-end method. Such a method does not yet exist. This paper reports on work done at the inaugural Comparing Modeling Approaches (CMA) workshop towards the goal of identifying potential comprehensive methodologies: (i) a common, focused case study for six modeling approaches, (ii) a set of criteria applied to each of the six approaches, and (iii) the assessment results. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Artificial intelligence

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On understanding software quality evolution from a defect perspective: A case study on an open source software system

On understanding software quality evolution from a defect pe...

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International Conference on computer systems and Industrial Informatics (ICCSII)

作者： Mourad Badri Nicholas Drouin Fadel Touré Software Engineering Research Laboratory Department of Mathematics and Computer Science University of Quebec Trois-Rivieres QUE Canada

software systems need to continually evolve during their life cycle. It is, therefore, important to monitor how their quality evolves so that quality assurance activities can be properly planned. In this paper, we analyze empirically the quality evolution of an open source software system (Apache Tomcat). We address software quality from an external perspective. We used the number of defects as a quality indicator. We wanted to investigate if the Qi (Quality Assurance Indicator) metric, which we proposed in a previous work, can be used to observe how quality, measured in terms of defects, evolves in the presence of changes. We performed an empirical analysis using historical data collected from the subject system covering a period of more than seven years (thirty-one versions). Results are reported and discussed in the paper.

关键词： Measurement Correlation software quality Complexity theory Testing software systems

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On the effect of aspect-oriented refactoring on testability of classes: A case study

On the effect of aspect-oriented refactoring on testability ...

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International Conference on computer systems and Industrial Informatics (ICCSII)

作者： Mourad Badri Aymen Kout Linda Badri Software Engineering Research Laboratory Department of Mathematics and Computer Science University of Quebec Trois-Rivieres QUE Canada

This paper aims at investigating empirically the effect of aspect-oriented refactoring on testability of classes in object-oriented software. We investigate testability from the perspective of unit testing. We performed an empirical analysis using (test suites and refactoring) data collected from a well-known open source Java software system (JHotdraw). We used, in fact, two versions of JHotDraw: the Java version (before aspect-oriented refactoring) and the AspectJ version (after aspect-oriented refactoring). To capture testability of classes, we used two metrics to quantify the corresponding JUnit test cases. JUnit test cases have been generated using a tool (CodePro). We also used object-oriented metrics to measure various source code attributes (coupling, cohesion, inheritance, complexity and size). In order to investigate the effect of aspect-oriented refactoring on testability of classes (characteristics of corresponding test cases), we used statistical tests. Results provide evidence that testability of the refactored classes has been improved.

关键词： Measurement Java Testing software systems Complexity theory Couplings

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Threshold concepts and threshold skills in computing 12

Threshold concepts and threshold skills in computing

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9th Annual International Conference on International Computing Education Research, ICER 2012

作者： Sanders, Kate Boustedt, Jonas Eckerdal, Anna Mccartney, Robert Moström, Jan Erik Thomas, Lynda Zander, Carol Mathematics and Computer Science Department Rhode Island College Providence RI United States Faculty of Engineering and Sustainable Development University of Gävle Gävle Sweden Department of Information Technology Uppsala University Uppsala Sweden Department of Computer Science and Engineering University of Connecticut Storrs CT United States Department of Computing Science Umeå University 901 87 Umeå Sweden Department of Computer Science Aberystwyth University Aberystwyth United Kingdom Computing and Software Systems University of Washington Bothell WA United States

ISBN: (纸本)9781450316040

Threshold concepts can be used to both organize disciplinary knowledge and explain why students have difficulties at certain points in the curriculum. Threshold concepts transform a student's view of the discipline;before being learned, they can block a student's progress. In this paper, we propose that in computing, skills, in addition to concepts, can sometimes be thresholds. Some students report finding skills more difficult than concepts. We discuss some computing skills that may be thresholds and compare threshold skills and threshold concepts. Copyright 2012 ACM.

关键词： Students

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Self-directed learning: Stories from industry 12

Self-directed learning: Stories from industry

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12th Koli Calling International Conference on Computing Education Research, Koli Calling 2012

作者： Zander, Carol Boustedt, Jonas Eckerdal, Anna Mccartney, Robert Moström, Jan Erik Sanders, Kate Thomas, Lynda Computing and Software Systems University of Washington Bothell Bothell WA United States Faculty of Engineering and Sustainable Development University of Gävle Gävle Sweden Department of InformationTechnology Uppsala University Uppsala Sweden Department of Computer Science and Engineering University of Connecticut Storrs CT United States Department of Computing Science Umeå University 901 87 Umeå Sweden Mathematics and Computer Science Department Rhode Island College Providence RI United States Department of Computer Science Aberystwyth University Aberystwyth United Kingdom

ISBN: (纸本)9781450317955

We report preliminary results from an ongoing investigation of how computing professionals perceive and value selfdirected learning, based on a qualitative analysis of interviews with ten computing professionals. The professionals expect that future colleagues will have a well-developed ability to learn on their own. They indicate that professionals use a range of resources, strategies, and collaborators to help them learn. They find their work-related self-directed learning enjoyable, expressing a sense of confidence and pride;yet they often also find it to be a stressful never-ending process. Copyright 2012 ACM.

关键词： informal learning self-directed learning industry perspective

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Reliable Provisioning of Spot Instances for Compute-intensive Applications

Reliable Provisioning of Spot Instances for Compute-intensiv...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： William Voorsluys Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Cloud computing providers are now offering their unused resources for leasing in the spot market, which has been considered the first step towards a full-fledged market economy for computational resources. Spot instances are virtual machines (VMs) available at lower prices than their standard on-demand counterparts. These VMs will run for as long as the current price is lower than the maximum bid price users are willing to pay per hour. Spot instances have been increasingly used for executing compute-intensive applications. In spite of an apparent economical advantage, due to an intermittent nature of biddable resources, application execution times may be prolonged or they may not finish at all. This paper proposes a resource allocation strategy that addresses the problem of running compute-intensive jobs on a pool of intermittent virtual machines, while also aiming to run applications in a fast and economical way. To mitigate potential unavailability periods, a multifaceted fault-aware resource provisioning policy is proposed. Our solution employs price and runtime estimation mechanisms, as well as three fault-tolerance techniques, namely check pointing, task duplication and migration. We evaluate our strategies using trace-driven simulations, which take as input real price variation traces, as well as an application trace from the Parallel Workload Archive. Our results demonstrate the effectiveness of executing applications on spot instances, respecting QoS constraints, despite occasional failures.

关键词： Fault tolerance Fault tolerant systems Checkpointing Runtime Virtual machining Computational modeling

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Preemption-aware Admission Control in a Virtualized Grid Federation

Preemption-aware Admission Control in a Virtualized Grid Fed...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Mohsen Amini Salehi Bahman Javadi Rajkumar Buyya Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Many applications in federated Grids have quality-of-service (QoS) constraints such as deadline. Admission control mechanisms assure QoS constraints of the applications by limiting the number of user requests accepted by a resource provider. However, in order to maximize their profit, resource owners are interested in accepting as many requests as possible. In these circumstances, the question that arises is: what is the effective number of requests that can be accepted by a resource provider in a way that the number of accepted external requests is maximized and, at the same time, QoS violations are minimized. In this paper, we answer this question in the context of a virtualized federated Grid environment, where each Grid serves requests from external users along with its local users and requests of local users have preemptive priority over external requests. We apply analytical queuing model to address this question. Additionally, we derive a preemption-aware admission control policy based on the proposed model. Simulation results under realistic working conditions indicate that the proposed policy improves the number of completed external requests (up to 25%). In terms of QoS violations, the 95% confidence interval of the average difference with other policies is between (14.79%, 18.56%).

关键词： Admission control Mathematical model Equations Analytical models Time factors Queueing analysis

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A new alternative of an authentication system using the eye vision ability

A new alternative of an authentication system using the eye ...

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International Conference on computer sciences and Convergence Information Technology (ICCIT)

作者： Kanogporn Nonsrichai Pattarasinee Bhattarakosol Innovative Network and Software Engineering Technology (INSET) Laboratory Department of Mathematics and Computer Science Faculty of Science Chulalongkorn University Bangkok Thailand

Biometrics authentication is one of the powerful solutions that being used broadly in the Information Security due to its high effective and accurate results. Nevertheless, most of these methods require specific devices to gain input data. The keystroke dynamics authentication is a biometric technique that requires a common device which is a keyboard. Therefore, this biometric is a very useful technology that can be implemented on various systems over the Internet as long as those users use keyboards. Unfortunately, the defect of using the keystroke dynamics is that the authentication result is invalid when users have different tempers. Thus, the accuracy of the use of the keystroke dynamics can be increased when combining this technique with other biometrics, such as the fingerprint and the iris scan. The unsuitable for these combinations is that special devices are required in the authentication process. So, to eliminate such requirements, this paper proposes the modification of keystroke dynamics biometric by adapting it with the speed of eyes vision in order to increase the higher accuracy of identifying legitimate users. The proposed solution expects that the authentication process can be performed on a basic device such as the keyboard.

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