flacoco is a fault localization tool for Java based on Jacoco and test-runner that aims at encompassing several fault localization techniques.

• Ease of use: With an intuitive, reliable and stable API, flacoco can be easily used in other projects such as automated program repair tools.
• Compatibility:
  • Supports JUnit3, Junit4 and JUnit5.
  • Supports Java 1 to Java 16 bytecode.
  • Runs on Java 8 to Java 16.
  • Runs on Linux, MacOS and Windows.
• Stability: Tests are executed in an isolated JVM.

If you use flacoco in academic research, please cite "FLACOCO: Fault Localization for Java based on Industry-grade Coverage", Technical report, arXiv 2111.12513, 2021.

@techreport{flacoco2021,
 title = {FLACOCO: Fault Localization for Java based on Industry-grade Coverage},
 year = {2021},
 author = {André Silva and Matias Martinez and Benjamin Danglot and Davide Ginelli and Martin Monperrus},
 url = {http://arxiv.org/pdf/2111.12513},
 number = {2111.12513},
 institution = {arXiv},
}

flacoco is currently only available as a SNAPSHOT.

You can use it by installing locally yourself, or by adding flacoco as a maven dependency:

$ mvn install -DskipTests

<dependency>
    <groupId>com.github.spoonlabs</groupId>
    <artifactId>flacoco</artifactId>
    <version>1.0.2</version>
</dependency>

The documentation lives in the Github wiki at https://github.com/SpoonLabs/flacoco/wiki

MIT License

External contributions are welcome.

• https://github.com/SpoonLabs/CoCoSpoon/
• https://github.com/GZoltar/gzoltar/
• https://github.com/saeg/jaguar