Log-Driven Testing of Microservice Systems with Transformers

Regression testing enhances software reliability by detecting regressions in new versions. Regression test suites often lack awareness of real-world product/service usage, potentially leading to undetected faults and ineffective testing scenarios. We propose LogTest, a transformer-based approach that learns from event logs and system traces to automatically generate service invocation sequences that mimic observed system behaviors. These sequences enhance regression test suites by exposing past real execution patterns. A preliminary experimentation on a realistic benchmark demonstrates its potential.