1,721,086 research outputs found
Reverse Engineering di sistemi Software. Limiti e potenzialità
No full textIl reverse engineering è un processo di analisi mirato all’identificazione delle componenti e relazioni di un sistema software. Da alcuni esperti è considerato un potente mezzo, mentre da altri un processo non realizzabile in pratica. Chi ha ragione? In questo articolo vengono sottolineati i limiti e le
potenzialità del reverse engineering. Prima di concludere con due storie di successo a livello industriale, l’articolo propone anche una possibile classificazione dei tool usati nel processo di reverse engineering
Understanding and Restructuring Web Sites with ReWeb
No full textAutomatic and semiautomatic Web site analysis was investigated using ReWeb. Focus was on a site's architecture and evolution. It was shown how ReWeb addresses the need to support Web site maintenance and evolution while retaining and possibly improving qualit
A 2-Layer Model for the White-Box Testing of Web Applications
No full textWhite-box testing exercises a software system by ensuring that a model of the internal structure is covered by the test cases. Extending this approach to Web applications is far from obvious, because at least two abstraction levels can be considered to represent the internal structure of a Web application: the navigation model and the control flow model. To further complicate the matter, dynamic code generation must be taken into account in both models. In this paper, the two alternative models are presented and white-box testing criteria are defined on them. Their usage for the white-box testing of a real-world Web application is described, highlighting the associated costs and benefit
Web Application Slicing
No full textThe growing importance of Web applications for our society makes their quality critical. Both development of new applications and evolution of existing ones are areas which demand for support techniques and tools.
Program slicing revealed a useful way to limit the search of software defects during debugging and to better understand the decomposition of the application into computations. We propose to extend the extraction of slices to Web applications, in order to produce a reduced Web application which behaves as the original one with respect to some criterion, i.e., some displayed information of interest.
After presenting the theoretical implications of applying slicing to Web applications, we will demonstrate its usefulness with reference to an example, derived from a survey of a set of travel agency sites. Web application slicing helps disclosing relevant information and understanding the internal system structur
Detecting Anomaly and Failure in Web Applications
No full textImproving Web application quality will require automated evaluation tools. Many such tools are already available either as commercial products or research prototypes. The authors use their automated evaluation tools, ReWeb and TestWeb, for Web analysis and testing that improves Web pages and applications and to find some anomalies and failures in four case studie
Analysis and Testing of Web Applications
No full textThe economic relevance of Web applications increases the importance of controlling and improving their quality. Moreover, the new available technologies for their development allow the insertion of sophisticated functions, but often leave the developers responsible for their organization and evolution. As a consequence, a high demand is emerging for methodologies and tools for quality assurance of Web based systems. In this paper, a UML model of Web applications is proposed for their high level representation. Such a model is the starting point for several analyses, which can help in the assessment of the static site structure. Moreover, it drives Web application testing, in that it can be exploited to define white box testing criteria and to semi-automatically generate the associated test cases. The proposed techniques were applied to several real world Web applications. Results suggest that an automatic support to the verification and validation activities can be extremely beneficial. In fact, it guarantees that all relevant paths in the site are properly exercised before its delivery. The high level of automation that is achieved in test case generation and execution increases the number of tests that are conducted and simplifies the regression check
Testing Processes of Web Applications
No full textCurrent practice in Web application development is based on the skills of the individual programmers and often does not apply the principles of software engineering. The increasing economic relevance and internal complexity of the new generation of Web applications require that proper quality standards are reached and that development is kept under control. It is therefore likely that the formalization of the process followed while developing these applications will be one of the major research topics.
In this paper we focus on Web application testing, a crucial phase when quality and reliability are a goal. Testing is considered in the wider context of the whole development process, for which an incremental/iterative model is devised. The processes behind the testing activities are analyzed considering the specificity of Web applications, for which the availability of a reference model is shown to be particularly important. The approach proposed in this paper covers the integration testing phase, which can take advantage of some features of Web applications (e.g. the http protocol employed), thus resulting in a higher level of automation with respect to traditional software.
The testing processes described in this paper are supported by the prototype research tool TestWeb. This tool exploits a reverse engineered UML (Unified Modeling Language) model for the Web application to generate and execute test cases, in order to satisfy the testing criteria selected by the user. The usage of this tool will be presented with reference to a real-world case stud
Web Testing: a Roadmap for the Empirical Research
No full textThe quality delivered by existing Web applications is often poor. A consequence of this situation is a strong demand for techniques and tools that address the problem of the Web application quality. Lots of approaches are currently available, often coming with prototype or commercial tools implementing them. However, no attempt has been made so far to validate their effectiveness. In this paper, we consider the available techniques for Web testing and we propose a classification into three major groups. We deal with the problem of defining the Web-specific faults. Our approach is an empirical investigation of the reported faults, abstracted into a fault model. Then, we evaluate the available techniques against the fault model, in terms of the fault categories directly addressed by them. Finally, we sketch a roadmap for the future empirical researc
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