MR-Coupler: Automated Metamorphic Test Generation via Functional Coupling Analysis
Metamorphic testing (MT) is a widely recognized technique for alleviating the oracle problem in software testing. However, its adoption is hindered by the difficulty of constructing effective metamorphic relations (MRs), which often require domain-specific or hard-to-obtain knowledge. In this work, we propose a novel approach that leverages the functional coupling between methods, which is readily available in source code, to automatically construct MRs and generate metamorphic test cases (MTCs). Our technique, MR-Coupler, identifies functionally coupled method pairs, employs large language models to generate candidate MTCs, and validates them through test amplification and mutation analy...
| Authors | Congying Xu, Hengcheng Zhu, Songqiang Chen et al. |
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| Primary category | cs.SE |
| Published | 11 April 2026 |
| Last updated at source | 17 April 2026 |
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