bpo-40275: Adding filesystem_helper submodule in test.support

[shihai1991]

Add a new test.support.filesystem_helper submodule and move TESTFN to filesystem_helper.

https://bugs.python.org/issue40275

[shihai1991]

@vstinner Hi, victor. Pls take a look if you have free time, thanks.

[vstinner]

Sorry, I cannot review a PR modifying 100+ files. You may try to add a new submodule which first adds aliases to support symbols, create small PRs to update tests (ex: PR for 20 tests), and then really move symbols from support to the new submodule.

I mean something like that for support/filesystem_helper.py:

from test.support import TESTFN

I expect the first PR to only modify 3 files: support/__init__.py, the new submodule and test.rst.

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[shihai1991]

Sorry, I cannot review a PR modifying 100+ files. You may try to add a new submodule which first adds aliases to support symbols, create small PRs to update tests (ex: PR for 20 tests), and then really move symbols from support to the new submodule.

I mean something like that for support/filesystem_helper.py:

from test.support import TESTFN

I expect the first PR to only modify 3 files: support/__init__.py, the new submodule and test.rst.

Thanks for your suggestion, victor. I will update this PR.

[vstinner]

Thanks for your suggestion, victor. I will update this PR.

I close this PR which has way too many reviewers.