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Reliability engineering dates back to reliability studies in the 20th century; since then, various models have been defined and used. Software engineering plays a key role from several viewpoints, but the main concern is that we're moving toward a more connected world, including enterprises and mobile devices. The three articles in this special issue illustrate current trends in this domain.
As security requirements of software often change, developers may modify security policies such as access control policies (policies in short) according to evolving requirements. To increase confidence that the modification of policies is correct, developers conduct regression testing. However, rerunning all of existing system test cases could be costly and time-consuming. To address this issue, we...
When a program is modified during software evolution, developers typically run the new version of the program against its existing test suite to validate that the changes made on the program did not introduce unintended side effects (i.e., regression faults). This kind of regression testing can be effective in identifying some regression faults, but it is limited by the quality of the existing test...
Test-case prioritization is a typical scenario of regression testing, which plays an important role in software maintenance. With the popularity of Web services, integrating Web services to build service-centric systems (SCSs) has attracted attention of many researchers and practitioners. During regression testing, as SCSs may use up constituent Web servicespsila request quotas (e.g., the upper limit...
Regression testing, which plays an important role in software maintenance, usually relies on test adequacy criteria to select and prioritize test cases. However, with the wide use and reuse of black-box components, such as reusable class libraries and COTS components, it is challenging to establish test adequacy criteria for testing software systems built on components whose source code is not available...
Software developers often face the task of determining how the behaviors of one version of a program unit differ from (or are the same as) the behaviors of a (slightly) different version of the same program unit. In such situations, developers would like to generate tests that exhibit the behavioral differences between the two versions, if any differences exist. We call this type of testing differential...
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