bpo-40275: Use new test.support helper submodules in tests

[shihai1991]

https://bugs.python.org/issue40275

[vstinner]

Strange. "Tests / Check for source changes (pull_request)" failed with "fatal: origin/master...HEAD: no merge base".

  shell: /bin/bash -e {0}
Run if [ -z "GITHUB_BASE_REF" ]; then
  if [ -z "GITHUB_BASE_REF" ]; then
    echo '::set-output name=run_tests::true'
  else
    git fetch origin $GITHUB_BASE_REF --depth=1
    git diff --name-only origin/$GITHUB_BASE_REF... | grep -qvE '(\.rst$|^Doc|^Misc)' && echo '::set-output name=run_tests::true' || true
  fi
  shell: /bin/bash -e {0}
From https://github.com/python/cpython
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
fatal: origin/master...HEAD: no merge base

https://github.com/python/cpython/pull/21764/checks?check_run_id=958183690

[shihai1991]

Strange. "Tests / Check for source changes (pull_request)" failed with "fatal: origin/master...HEAD: no merge base".

  shell: /bin/bash -e {0}
Run if [ -z "GITHUB_BASE_REF" ]; then
  if [ -z "GITHUB_BASE_REF" ]; then
    echo '::set-output name=run_tests::true'
  else
    git fetch origin $GITHUB_BASE_REF --depth=1
    git diff --name-only origin/$GITHUB_BASE_REF... | grep -qvE '(\.rst$|^Doc|^Misc)' && echo '::set-output name=run_tests::true' || true
  fi
  shell: /bin/bash -e {0}
From https://github.com/python/cpython
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
fatal: origin/master...HEAD: no merge base

https://github.com/python/cpython/pull/21764/checks?check_run_id=958183690

Oh, meet this problem again. I already open an thread in: https://discuss.python.org/t/why-the-ci-gate-in-fork-repo-has-been-disabled/4909.
Looks like nobody know the reason.

[vstinner]

LGTM.

[vstinner]

It failed on Windows:

ERROR: setUpClass (test.test_asyncio.test_proactor_events.ProactorEventLoopUnixSockSendfileTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "d:\a\1\s\lib\test\test_asyncio\test_proactor_events.py", line 937, in setUpClass
    with open(os_helper.TESTFN, 'wb') as fp:
NameError: name 'os_helper' is not defined

[shihai1991]

It failed on Windows:

ERROR: setUpClass (test.test_asyncio.test_proactor_events.ProactorEventLoopUnixSockSendfileTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "d:\a\1\s\lib\test\test_asyncio\test_proactor_events.py", line 937, in setUpClass
    with open(os_helper.TESTFN, 'wb') as fp:
NameError: name 'os_helper' is not defined

updated.

[vstinner]

updated

Ah, maybe the GitHub UI pointed me to the wrong build. Now I see that Azure Pipelines is running again.

[shihai1991]

updated

Ah, maybe the GitHub UI pointed me to the wrong build. Now I see that Azure Pipelines is running again.

Your are right. I have push a commit again: )

[shihai1991]

Strange. "Tests / Check for source changes (pull_request)" failed with "fatal: origin/master...HEAD: no merge base".

  shell: /bin/bash -e {0}
Run if [ -z "GITHUB_BASE_REF" ]; then
  if [ -z "GITHUB_BASE_REF" ]; then
    echo '::set-output name=run_tests::true'
  else
    git fetch origin $GITHUB_BASE_REF --depth=1
    git diff --name-only origin/$GITHUB_BASE_REF... | grep -qvE '(\.rst$|^Doc|^Misc)' && echo '::set-output name=run_tests::true' || true
  fi
  shell: /bin/bash -e {0}
From https://github.com/python/cpython
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
fatal: origin/master...HEAD: no merge base

https://github.com/python/cpython/pull/21764/checks?check_run_id=958183690

Looks like ... in `git diff --name-only origin/$GITHUB_BASE_REF... ' is redundant(I am not sure about it).
But It is worked actually after I removed it: https://github.com/shihai1991/cpython/pull/28/files