fix for BUG: failing test_hierharchy_arraylist with jdk>=21 #736

[cmacdonald]

As reported by @h-vetinari the test test_hierharchy_arraylist made assumptions about the hierarchy of objects that are no longer relevant. This softens the test so it works on jdks 21-23.

Before merging, we need to agree on the JDK versions we should be testing. Windows termurin seems to only have upto 18?

[tshirtman]

As far as i can tell, the change should work on the previous versions as well, as it accepts the result we used to enforce. I'm not sure it should be conditional on changing JDK versions tested in CI. Dropping old versions is always a tradeoff, and it can be acceptable, even if some software still didn't upgrade their support.

looking at
https://endoflife.date/oracle-jdk
https://endoflife.date/redhat-build-of-openjdk
and https://endoflife.date/microsoft-build-of-openjdk

doesn't seem to give any consistent indication to what should be supported…

[h-vetinari]

Thanks for working on a fix! This will fix #736

[h-vetinari]

doesn't seem to give any consistent indication to what should be supported…

Plus there are alternative implementations of the java runtime; a good overview of the timelines can be found at wikipedia. Of course, pyjnius could choose not to support all versions anymore, many projects in the ecosystem have dropped Java 8 already, for example.