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van Dinten, I. (author), Derakhshanfar, Pouria (author), Panichella, A. (author), Zaidman, A.E. (author)Cyber-Physical Systems (CPSs) have gained traction in recent years. A major non-functional quality of CPS is performance since it affects both usability and security. This critical quality attribute depends on the specialized hardware, simulation engines, and environmental factors that characterize the system under analysis. While a large body...journal article 2024
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Khatami, Ali (author), Zaidman, A.E. (author)To ensure the quality of software systems, software engineers can make use of a variety of quality assurance approaches, for example, software testing, modern code review, automated static analysis, and build automation. Each of these quality assurance practices have been studied in depth in isolation, but there is a clear knowledge gap when...journal article 2024
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Derakhshanfar, P. (author), Devroey, Xavier (author), Panichella, A. (author), Zaidman, A.E. (author), van Deursen, A. (author)Search-based approaches have been used in the literature to automate the process of creating unit test cases. However, related work has shown that generated tests with high code coverage could be ineffective, i.e., they may not detect all faults or kill all injected mutants. In this paper, we propose Cling, an integration-level test case...journal article 2023
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Zaidman, A.E. (author), Khatami, Ali (author)Software engineers employ a variety of approaches to ensure the quality of software systems, including software testing, modern code review, automated static analysis, build automation, and continuous integration. To make effective decisions regarding quality assurance (QA), software engineers need to have an awareness of (1) the QA approaches...conference paper 2023
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Wessel, Mairieli (author), Zaidman, A.E. (author), Gerosa, Marco Aurélio (author), Steinmacher, Igor (author)Projects on GitHub rely on the automation provided by software development bots. Nevertheless, the presence of bots can be annoying and disruptive to the community. Backed by multiple studies with practitioners, this article provides guidelines for developing and maintaining software bots.journal article 2023
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Deljouyi, A. (author), Zaidman, A.E. (author)Automatic unit test generators such as EvoSuite are able to automatically generate unit test suites with high coverage. This removes the burden of writing unit tests from developers, but the generated tests are often difficult to understand for them. In this paper, we introduce the MicroTestCarver approach that generates unit tests starting from...conference paper 2023
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Brandt, C.E. (author), Wang, D. (author), Zaidman, A.E. (author)Test amplification generates new tests by mutating existing, developer-written tests and keeping those tests that improve the coverage of the test suite. Current amplification tools focus on starting from a specific test and propose coverage improvements all over a software project, requiring considerable effort from the software engineer to...conference paper 2023
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Swillus, M. (author), Zaidman, A.E. (author)Software testing is an integral part of modern software engineering practice. Past research has not only underlined its significance, but also revealed its multi-faceted nature. The practice of software testing and its adoption is influenced by many factors that go beyond tools or technology. This paper sets out to investigate the context of...journal article 2023
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Denkers, J. (author), Brunner, Marvin (author), van Gool, Louis (author), Vinju, Jurgen J. (author), Zaidman, A.E. (author), Visser, Eelco (author)Flexible printing systems are highly complex systems that consist of printers, that print individual sheets of paper, and finishing equipment, that processes sheets after printing, for example, assembling a book. Integrating finishing equipment with printers involves the development of control software that configures the devices, taking...journal article 2023
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Ardıç, B.A. (author), Zaidman, A.E. (author)Software testing is generally acknowledged to be an important weapon in the arsenal of software engineers to produce correct and reliable software systems. However, given the importance of the topic, little is known about where software engineers get their testing knowledge and skills from. Is this through (higher) education, training...conference paper 2023
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van Dinten, I. (author), Zaidman, A.E. (author), Panichella, A. (author)Test case prioritization techniques have emerged as effective strategies to optimize this process and mitigate the regression testing costs. Commonly, black-box heuristics guide optimal test ordering, leveraging information retrieval (e.g., cosine distance) to measure the test case distance and sort them accordingly. However, a challenge...conference paper 2023
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Hugtenburg, S. (author), Zaidman, A.E. (author)Community Question Answering (CQA) platforms like Stack Over- flow enable gamified and moderated community-driven knowledge creation. We report on our experiences of introducing Stack Over- flow in our Computer Science BSc programme and explore whether these platforms can (1) reduce the workload of lecturers in answer- ing questions in large...conference paper 2022
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Botocan, Cristian Alexandru (author), Deshmukh, Piyush (author), Makridis, Pavlos (author), Huidobro, Jorge Romeu (author), Sundarrajan, Mathanrajan (author), Aniche, Maurício (author), Zaidman, A.E. (author)Software testing is one of the most important aspects of modern software development. To ensure the quality of the software, developers should ideally write and execute automated tests regularly as their code-base evolves. TestKnight, a plugin for the IntelliJ IDEA integrated development environment (IDE), aims to help Java developers improve...conference paper 2022
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- Khomh, Foutse (author), Zaidman, A.E. (author) contribution to periodical 2022
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Boone, Casper (author), Brandt, C.E. (author), Zaidman, A.E. (author)The most common reason for Continuous Integration (CI) builds to break is failing tests. When a build breaks, a developer often has to scroll through hundreds to thousands of log lines to find which test is failing and why. Finding the issue is a tedious process that relies on a developer's experience and increases the cost of software testing....conference paper 2022
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Derakhshanfar, P. (author), Devroey, Xavier (author), Zaidman, A.E. (author)Search-based techniques have been widely used for white-box test generation. Many of these approaches rely on the approach level and branch distance heuristics to guide the search process and generate test cases with high line and branch coverage. Despite the positive results achieved by these two heuristics, they only use the information...journal article 2022
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Brandt, C.E. (author), Zaidman, A.E. (author)Automatically generating test cases for software has been an active research topic for many years. While current tools can generate powerful regression or crash-reproducing test cases, these are often kept separately from the maintained test suite. In this paper, we leverage the developer’s familiarity with test cases amplified from existing,...journal article 2022
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Brandt, C.E. (author), Zaidman, A.E. (author)Developer testing, the practice of software engineers programmatically checking that their own components behave as they expect, has become the norm in today's software projects. With the constantly growing size and complexity of software projects and with the rise of automated test generation tools, understanding a test case is becoming more...conference paper 2022
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Chowdhury, Shaiful (author), Holmes, Reid (author), Zaidman, A.E. (author), Kazman, Rick (author)Evaluating and predicting software maintenance effort using source code metrics is one of the holy grails of software engineering. Unfortunately, previous research has provided contradictory evidence in this regard. The debate is still open: as a community we are not certain about the relationship between code metrics and maintenance impact....journal article 2022
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Oosterbroek, W. (author), Brandt, C.E. (author), Zaidman, A.E. (author)Test amplification generates new tests by modifying existing, manually written tests.<br/>Up until now, this process preserves statements that were relevant for the original test case but are no longer needed for the behavior of the new test case.<br/>These unnecessary statements impact the readability of the tests in question.<br/>As a part of...conference paper 2021