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asyncio unix events test doesn't restore mocked unix_events.can_use_pidfd #103780

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itamaro opened this issue Apr 24, 2023 · 0 comments · Fixed by #103782
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asyncio unix events test doesn't restore mocked unix_events.can_use_pidfd #103780

itamaro opened this issue Apr 24, 2023 · 0 comments · Fixed by #103782
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type-bug An unexpected behavior, bug, or error

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@itamaro
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itamaro commented Apr 24, 2023 •
edited by bedevere-bot

Bug report

in test_asyncio.test_unix_events.PolicyTest.test_get_default_child_watcher, unix_events.can_use_pidfd is mocked within the test body, but never restored to the original function.

this doesn't cause test failures during regular test runs, but during a refleak test run on MacOS it a AttributeError: module 'os' has no attribute 'pidfd_open' to be thrown (presumably due to another test using the non-mocked function in the second iteration).

repro:

./python.exe -m test test_asyncio -m '*.test_unix_events.*' -R 2:2
WARNING: Running tests with --huntrleaks/-R and less than 3 warmup repetitions can give false positives!
0:00:00 load avg: 3.79 Run tests sequentially
0:00:00 load avg: 3.79 [1/1] test_asyncio
beginning 4 repetitions
1234
.Process ForkProcess-10:
Traceback (most recent call last):
...
...
AttributeError: module 'os' has no attribute 'pidfd_open'
...
...

this can be fixed by patching instead of mocking in the test_get_default_child_watcher test (PR coming up).

Your environment

  • CPython versions tested on: main
  • Operating system and architecture: MacOS x86-64

Linked PRs
@itamaro itamaro added the type-bug An unexpected behavior, bug, or error label Apr 24, 2023
itamaro added a commit to itamaro/cpython that referenced this issue Apr 24, 2023
@itamaro
pythongh-103780: Use patch instead of mock in asyncio unix events test
a76f2e2 
Fixes pythongh-103780
@itamaro itamaro mentioned this issue Apr 24, 2023
Merged
carljm pushed a commit that referenced this issue Apr 24, 2023
@itamaro
gh-103780: Use patch instead of mock in asyncio unix events test (#10…
518050c 
…3782)
carljm added a commit to carljm/cpython that referenced this issue Apr 24, 2023
@carljm
Merge branch 'main' into superopt
0de5bc6 
* main:
  pythongh-101517: fix line number propagation in code generated for except* (python#103550)
  pythongh-103780: Use patch instead of mock in asyncio unix events test (python#103782)
carljm added a commit to carljm/cpython that referenced this issue Apr 24, 2023
@carljm
Merge branch 'superopt' into superopt_spec
1972ca4 
* superopt: (82 commits)
  pythongh-101517: fix line number propagation in code generated for except* (python#103550)
  pythongh-103780: Use patch instead of mock in asyncio unix events test (python#103782)
  pythongh-102498 Clean up unused variables and imports in the email module  (python#102482)
  pythongh-99184: Bypass instance attribute access in `repr` of `weakref.ref` (python#99244)
  pythongh-99032: datetime docs: Encoding is no longer relevant (python#93365)
  pythongh-94300: Update datetime.strptime documentation (python#95318)
  pythongh-103776: Remove explicit uses of $(SHELL) from Makefile (pythonGH-103778)
  pythongh-87092: fix a few cases of incorrect error handling in compiler (python#103456)
  pythonGH-103727: Avoid advancing tokenizer too far in f-string mode (pythonGH-103775)
  Revert "Add tests for empty range equality (python#103751)" (python#103770)
  pythongh-94518: Port 23-argument `_posixsubprocess.fork_exec` to Argument Clinic (python#94519)
  pythonGH-65022: Fix description of copyreg.pickle function (python#102656)
  pythongh-103323: Get the "Current" Thread State from a Thread-Local Variable (pythongh-103324)
  pythongh-91687: modernize dataclass example typing (python#103773)
  pythongh-103746: Test `types.UnionType` and `Literal` types together (python#103747)
  pythongh-103765: Fix 'Warning: py:class reference target not found: ModuleSpec' (pythonGH-103769)
  pythongh-87452: Improve the Popen.returncode docs
  Removed unnecessary escaping of asterisks (python#103714)
  pythonGH-102973: Slim down Fedora packages in the dev container (python#103283)
  pythongh-103091: Add PyUnstable_Type_AssignVersionTag (python#103095)
  ...
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gh-103780: Use patch instead of mock in asyncio unix events test itamaro/cpython
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