Additional tests for #3168

[lifthrasiir]

These were a part of tests I was preparing for #3165, and I believe it's worthy to add them (any single of them fails in the current main branch).

[adamreichold]

any single of them fails in the current main branch

I am confused now: They do seem to pass in the CI? Do they fail only intermittently? Could you also check whether #3168 does resolve the issues you found?

[lifthrasiir]

Sorry, your PR definitely passes all of those tests (as confirmed by the CI). I meant to say that those tests are crafted so that PyO3 don't pass them without your PR.

[adamreichold]

Ah sorry, I missed the target branch of this PR! It is targetting #3168 and not main.

Also sorry for not starting with that: Thank you for going the extra mile and packaging up your tests so we can include them upstream!

[DataTriny]

First time contributor has agreed to the new licensing scheme.

[adamreichold]

Thanks again for this comprehensive set of tests.

I'll hold off merging this into #3168 until we have consensus that that approach is what we will pursue to avoid that this PR needs to be recreated if we decide to pursue another approach.