It Is Not the Length That Matters, It Is How You Control It

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Executive Summary

The length of test cases is a little investigated topic in search-based test generation for object oriented software, where test cases are sequences of method calls. While intuitively longer tests can achieve higher overall code coverage, there is always the threat of bloat - a complex phenomenon in evolutionary computation, where the length abnormally grows over time. In this paper, the authors show that bloat indeed also occurs in the context of test generation for object oriented software. They present different techniques to overcome the problem of length bloat, and evaluate all possible combinations of these techniques using different search lengths.

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