Hybrid Regression Test Selection by Integrating File and Method Dependences

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Regression Testing Selection (RTS) reduces the cost of regression testing by only running test cases affected by code changes. Due to the bottleneck of single granularity analyses, the latest RTS techniques tend to analyze with mixed granularities. However, a better synergy of the existing RTS techniques is still challenging. Besides, we have found that once existing RTS approaches use static method-level analysis, handling external library callbacks is difficult, leading to the missed selection of affected test cases.