ESEC/FSE 2021 CoLos
29th ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE 2021)
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1st International Workshop on Test Oracles (TORACLE 2021), August 24, 2021, Athens, Greece

TORACLE 2021 – Preliminary Table of Contents

Contents - Abstracts - Authors

1st International Workshop on Test Oracles (TORACLE 2021)


Title Page

Message from the Chairs

Using Machine Learning to Generate Test Oracles: A Systematic Literature Review
Afonso Fontes and Gregory Gay ORCID logo
(Chalmers University of Technology, Sweden; University of Gothenburg, Sweden)
Machine learning may enable the automated generation of test oracles. We have characterized emerging research in this area through a systematic literature review examining oracle types, researcher goals, the ML techniques applied, how the generation process was assessed, and the open research challenges in this emerging field.
Based on a sample of 22 relevant studies, we observed that ML algorithms generated test verdict, metamorphic relation, and---most commonly---expected output oracles. Almost all studies employ a supervised or semi-supervised approach, trained on labeled system executions or code metadata---including neural networks, support vector machines, adaptive boosting, and decision trees. Oracles are evaluated using the mutation score, correct classifications, accuracy, and ROC. Work-to-date show great promise, but there are significant open challenges regarding the requirements imposed on training data, the complexity of modeled functions, the ML algorithms employed---and how they are applied---the benchmarks used by researchers, and replicability of the studies. We hope that our findings will serve as a roadmap and inspiration for researchers in this field.

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