Part of jpackage testing is comparing test logs produced by jpackage tests.

For the most part, test logs are stable. Test logs of the same test after derandomization with [1] script make a minimal diff. However, there is a potential to clean up the diff - simple things like using TreeMap instead of HashMap for data ending up in test logs.

[1] https://github.com/openjdk/jdk/blob/master/test/jdk/tools/jpackage/clean_test_output.sh