This project demonstrates a bug in IntelliJ IDEA.

If you run tests with Maven everything works, regardless of profile:

mvn -Pworking test

mvn -Pbroken test

should both work.

However, if you run the JUnit test in IntelliJ IDEA without Maven, with the broken profile, the test will fail.

This is because Intellij IDEA's MavenJUnitPatcher only correctly uses the maven-surefire-plugin <argLine> if all interpolated properties are present.

If a single property is missing, the <argLine> will not be used by IntelliJ's test runner, which is horrible to debug.