Abstract
In the twenty-first century, our life will increasingly depend on software-based products and complex interconnected systems. Thus, the quality and security of software-based systems is a world-wide concern. Combinatorial testing is a versatile methodology for finding errors (bugs) and vulnerabilities in software-based systems. This paper offers a review of combinatorial testing. Combinatorial testing (CT) methods evolved from investigations which looked like factorial experiments (FE) with pass/fail outcomes. We will discuss the similarities and differences between FE and CT. Use of CT for detecting errors (bugs) in software-based systems has gained significant interest from the international software testing community. Many successful results have been reported from the use of CT to detect software errors in aerospace, automotive, defense, cybersecurity, electronic medical systems, and financial service industries. Now, combinatorial testing methods are being increasingly used to investigate vulnerabilities in software-based systems. Combinatorial testing could be useful in detecting errors and security vulnerabilities in Internet of Things, Autonomous Systems, and Artificially Intelligent Software.
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