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Isolating Failure-Inducing Combinations in Combinatorial Testing Using Test Augmentation and Classification

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Executive Summary

Combinatorial Testing (CT) is a systematic way of sampling input parameters of the Software Under Test (SUT). A t-way combinatorial test set can exercise all behaviors of the SUT caused by interactions between t input parameters or less. Although combinatorial testing can provide fault detection capability, it is often desirable to isolate the input combinations that cause failures. Isolating these failure-inducing combinations aids developers in understanding the causes of failures. Previous work directly uses classification tree analysis on the results of combinatorial testing to model the failure inducing combinations. But in many scenarios, the effectiveness of classification depends upon whether the analyzed test set is sufficient for classification.

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