This data-driven paper quantitatively evaluates software testing behaviors that students exhibited in introductory computer science courses. The evaluation includes data collected over five years (10 semesters) from 49,980 programming assignment submissions by 883 different students. To examine the effectiveness of software testing behaviors, we investigate the quality of their testing at different stages of their development. We partition testing behaviors into four groups according to when in their development they first achieve substantial (at least 85%) test coverage.
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Buffardi et al. (2013) studied this question.
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