multi-version-behavior-comparator

To detect behavioral regressions after refactoring, use differential testing to compare runtime behaviors across multiple code versions. This process analyzes return values, exceptions, side effects, and I/O streams for discrepancies when running identical inputs.

Differential testing validates code consistency by comparing the outputs, side effects, and errors of two or more code versions run with identical inputs. It characterizes behavioral divergence to identify subtle bugs or unexpected changes from optimization efforts.

Yes, you can compare more than two code versions simultaneously for behavioral differences. The tool supports N-way comparison to analyze return values, exceptions, side effects, and I/O streams across multiple versions at once.

To characterize runtime behavioral divergence across code versions, run differential testing against identical test inputs. The analysis goes beyond simple detection to describe exactly how the versions differ in outputs, side effects, and errors for root cause analysis.

Yes, multi-version behavior comparison works without external dependencies. It relies on internal scripts and references to compare return values, exceptions, side effects, and I/O streams across code versions.