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The critical activity of testing is the systematic selection of suitable test cases, which is able to reveal highly the faults. Therefore, mutation coverage is an effective criterion for generating test data. Since the test data generation process is very labor intensive, time-consuming and error-prone when done manually, the automation of this process is highly aspired. The researches about automatic test data generation contributed a set of tools, approaches, development and empirical results. This paperanalyzes and conducts a comprehensive survey on generating test data based on mutation. The paper also analyzes the trends in this field. [ABSTRACT FROM AUTHOR]

The selection of test cases to satisfy a structural testing criterion is a very important task because it concerns the quality of the generated test cases. The question is “How to select a test case or path to cover an element required by a structural criterion?” The Constraint Based Criteria are proposed with the goal of answering this question and improving the efficacy, that is, the number of revealed faults. These criteria permit the use of different testing strategies by associating constraints to the required elements. The constraints describe faults generally not revealed by the structural technique. The Constraint Based Criteria can also be used to assess test data sets adequacy. [ABSTRACT FROM AUTHOR]