### Relevant Articles:

- [Guide to the System Rules Library](https://www.baeldung.com/java-system-rules-junit)
- [Guide to the System Stubs Library](https://www.baeldung.com/java-system-stubs)
- [Code Coverage with SonarQube and JaCoCo](https://www.baeldung.com/sonarqube-jacoco-code-coverage)