Some test folder contains too many test cases

[earthengine]

As a folder is a minimal unit of test case sets, it might takes too long to finish test if there are too many files and we want to add a single test into that folder and test for the new folder.

For example, src/test/run-pass contains 2500+ tests and took almost 20 mins to run through.

Test cases should be organised better and so we don't take too long to add a new test and verify a minimal set that includes the new test.

[sanxiyn]

See #20796 for the previous discussion.

[durka]

Is it useful to consider a folder as a "minimal unit" of tests? I'm not sure. Where did you see that suggestion? You can run a single test: e.g. ./x.py test --stage 1 src/test/run-pass --test-args name_of_test.rs.

[Mark-Simulacrum]

I don't really see it as feasible for us to split up tests (indeed, I've wanted more tests in the same folder but different categories before to make it easier to write and move them).

[Mark-Simulacrum]

I'm going to close this. I don't think we're moving to split test cases into folders, much, though I imagine a PR which grouped up test cases would maybe be accepted.