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gh-115596: Fix ProgramPriorityTests in test_os permanently changing the process priority (GH-115610)

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Brian Schubert 2024-02-17 11:42:57 -05:00 committed by GitHub
parent 437924465d
commit 90dd653a61
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2 changed files with 17 additions and 16 deletions
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31
Lib/test/test_os.py
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@ -3506,23 +3506,22 @@ class ProgramPriorityTests(unittest.TestCase):
"""Tests for os.getpriority() and os.setpriority()."""
def test_set_get_priority(self):
base = os.getpriority(os.PRIO_PROCESS, os.getpid())
os.setpriority(os.PRIO_PROCESS, os.getpid(), base + 1)
try:
new_prio = os.getpriority(os.PRIO_PROCESS, os.getpid())
# nice value cap is 19 for linux and 20 for FreeBSD
if base >= 19 and new_prio <= base:
raise unittest.SkipTest("unable to reliably test setpriority "
"at current nice level of %s" % base)
else:
self.assertEqual(new_prio, base + 1)
finally:
try:
os.setpriority(os.PRIO_PROCESS, os.getpid(), base)
except OSError as err:
if err.errno != errno.EACCES:
raise
code = f"""if 1:
import os
os.setpriority(os.PRIO_PROCESS, os.getpid(), {base} + 1)
print(os.getpriority(os.PRIO_PROCESS, os.getpid()))
"""
# Subprocess inherits the current process' priority.
_, out, _ = assert_python_ok("-c", code)
new_prio = int(out)
# nice value cap is 19 for linux and 20 for FreeBSD
if base >= 19 and new_prio <= base:
raise unittest.SkipTest("unable to reliably test setpriority "
"at current nice level of %s" % base)
else:
self.assertEqual(new_prio, base + 1)
@unittest.skipUnless(hasattr(os, 'sendfile'), "test needs os.sendfile()")

2
Misc/NEWS.d/next/Tests/2024-02-17-08-25-01.gh-issue-115596.RGPCrR.rst Normal file
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@ -0,0 +1,2 @@
Fix ``ProgramPriorityTests`` in ``test_os`` permanently changing the process
priority.