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bpo-39460: Fix test_zipfile.test_add_file_after_2107() (GH-18247)

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XFS filesystem is limited to 32-bit timestamp, but the utimensat()
syscall doesn't fail. Moreover, there is a VFS bug which returns
a cached timestamp which is different than the value on disk.

https://bugzilla.redhat.com/show_bug.cgi?id=1795576
https://bugs.python.org/issue39460#msg360952
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Victor Stinner 2020-01-29 15:23:29 +01:00 • committed by GitHub
parent 35eac4500a
commit 3cb49b62e6
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12
Lib/test/test_zipfile.py
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@ -616,6 +616,18 @@ class StoredTestsWithSourceFile(AbstractTestsWithSourceFile,
except OverflowError:
self.skipTest('Host fs cannot set timestamp to required value.')
mtime_ns = os.stat(TESTFN).st_mtime_ns
if mtime_ns != (4386268800 * 10**9):
# XFS filesystem is limited to 32-bit timestamp, but the syscall
# didn't fail. Moreover, there is a VFS bug which returns
# a cached timestamp which is different than the value on disk.
#
# Test st_mtime_ns rather than st_mtime to avoid rounding issues.
#
# https://bugzilla.redhat.com/show_bug.cgi?id=1795576
# https://bugs.python.org/issue39460#msg360952
self.skipTest(f"Linux VFS/XFS kernel bug detected: {mtime_ns=}")
with zipfile.ZipFile(TESTFN2, "w") as zipfp:
self.assertRaises(struct.error, zipfp.write, TESTFN)