Maxros/test

CS4570 Java Refactoring Benchmark — High-Resource Tier

This dataset contains Java refactoring commits mined from 57 high-resource GitHub repositories (≥1000 stars, ≥10 contributors).

Each commit was:

1. Detected by RefactoringMiner 3.1.3 as containing at least one Java refactoring operation
2. Verified by building the project and running its test suite before and after the commit using Docker (Maven/Gradle with JDK17/21)

Statistics

Metric	Value
Repositories	57
Total commits with tests	983
PASS_TO_PASS commits	981
Unique refactoring types	66

Fields

Field	Type	Description
repo	string	owner_repo identifier
commit	string	Git commit SHA
commit_url	string	GitHub URL to the commit
repo_url	string	GitHub URL to the repository
refactoring_count	int	Number of refactorings in this commit
refactoring_types	list[str]	Refactoring type labels from RefactoringMiner
compile_before	bool	Did the project compile at the parent commit?
compile_after	bool	Did the project compile after this commit?
tests_pass_before	bool	Did ALL tests pass before?
tests_pass_after	bool	Did ALL tests pass after?
test_count_before	int	Number of tests before
test_count_after	int	Number of tests after
pass_to_pass_tests	list[str]	Tests that pass both before and after
fail_to_pass_tests	list[str]	Tests that fail before but pass after
is_pass_to_pass	bool	At least one P2P test exists
pass_to_pass_count	int	Number of P2P tests
fail_to_pass_count	int	Number of F2P tests

Refactoring Types

Top types: Extract Variable, Add Method Annotation, Rename Variable, Rename Method, Inline Variable, Rename Parameter, Change Variable Type, Add Variable Modifier, Extract Method, Rename Attribute

Citation

TU Delft CS4570 — ML for Software Engineering benchmark, 2026.