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Size and code coverage are important attributes of a set of tests. When a program P is executed on elements of the test set T, we can observe the fault detecting capability of T for P. We can also observe the degree to which T induces code coverage on P according to some coverage criterion. We would like to know whether it is the size of T or the coverage(More)
Finding a fault in a program is a complex process which involves understanding the program's purpose, structure, semantics, and the relevant characteristics of failure producing tests. We describe a tool which supports execution slicing and dicing based on test cases. We report the results of an experiment that uses heuristic techniques in fault(More)
Localizing a bug in a program can be a complex and time- consuming process. In this paper we propose a code coverage-based fault localization method to prioritize suspicious code in terms of its likelihood of containing program bugs. Code with a higher risk should be examined before that with a lower risk, as the former is more suspicious (i.e., more likely(More)
The purpose of regression testing is to ensure that changes made to software, such as adding new features or modifying existing features, have not adversely affected features of the software that should not change. Regression testing is usually performed by running some, or all, of the test cases created to test modifications in previous versions of the(More)
This paper proposes a strategy for automatically fixing faults in a program by combining the processes of mutation and fault localization. Statements that are ranked in order of their suspiciousness of containing faults can then be mutated in the same order to produce possible fixes for the faulty program. The proposed strategy is evaluated against the(More)
Amongst the various testing strategies, mutation testing has been empirically found to be the most eeective in detecting faults. However, mutation often imposes unacceptable demands on computing and human resources due to the large number of mutants that need to be compiled and executed on one or more test cases. In addition, the tester needs to examine(More)
An important question in software testing is whether it is reasonable to apply coverage based criteria as a lter to reduce the size of a test set. An empirical study was conducted using a test set minimization technique to explore the eeect of reducing the size of a test set, while keeping block coverage constant, on the fault detection strength of the(More)
An important step toward eecient software maintenance is to locate the code relevant to a particular feature. In this paper we report a study applying an execution slice-based technique to a reliability and performance evaluator to identify the code which is unique to a feature, or is common to a group of features. Supported by tools called ATAC and Vue,(More)
One of the most important steps towards e ective software maintenance of a large complicated system is to understand how program features are spread over the entire system and their interactions with the program components. However, we must rst be able to represent an abstract feature in terms of some concrete program components. In this paper, we use an(More)