https://github.com/python/cpython/commit/6f8f97fe5246837b93e6c2f3525aa9f623ecd30b commit: 6f8f97fe5246837b93e6c2f3525aa9f623ecd30b branch: main author: Serhiy Storchaka <[email protected]> committer: serhiy-storchaka <[email protected]> date: 2026-07-22T07:00:11Z summary:
gh-154427: Check the access time in UtimeTests only if it is stored (GH-154428) HAMMER2 on DragonFly BSD does not store the access time and os.stat() returns the modification time instead. Probe the file system, like it is already done for the timestamp resolution. Co-authored-by: Claude Opus 4.8 <[email protected]> files: M Lib/test/test_os/test_os.py diff --git a/Lib/test/test_os/test_os.py b/Lib/test/test_os/test_os.py index b4310043b60178..c62bceb25cabe0 100644 --- a/Lib/test/test_os/test_os.py +++ b/Lib/test/test_os/test_os.py @@ -1058,11 +1058,18 @@ def support_subsecond(self, filename): or (st.st_mtime != st[8]) or (st.st_ctime != st[9])) + def support_atime(self, filename): + # Heuristic to check if the filesystem stores the access time. + # Use whole seconds, to not depend on the timestamp resolution. + os.utime(filename, (1, 2)) + return os.stat(filename).st_atime == 1 + def _test_utime(self, set_time, filename=None): if not filename: filename = self.fname support_subsecond = self.support_subsecond(filename) + support_atime = self.support_atime(filename) if support_subsecond: # Timestamp with a resolution of 1 microsecond (10^-6). # @@ -1089,18 +1096,22 @@ def _test_utime(self, set_time, filename=None): # digits worth of sub-second precision. # Some day it would be good to fix this upstream. delta=1e-5 - self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-5) + if support_atime: + self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-5) + self.assertAlmostEqual(st.st_atime_ns, atime_ns, delta=1e9 * 1e-5) self.assertAlmostEqual(st.st_mtime, mtime_ns * 1e-9, delta=1e-5) - self.assertAlmostEqual(st.st_atime_ns, atime_ns, delta=1e9 * 1e-5) self.assertAlmostEqual(st.st_mtime_ns, mtime_ns, delta=1e9 * 1e-5) else: if support_subsecond: - self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-6) + if support_atime: + self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-6) self.assertAlmostEqual(st.st_mtime, mtime_ns * 1e-9, delta=1e-6) else: - self.assertEqual(st.st_atime, atime_ns * 1e-9) + if support_atime: + self.assertEqual(st.st_atime, atime_ns * 1e-9) self.assertEqual(st.st_mtime, mtime_ns * 1e-9) - self.assertEqual(st.st_atime_ns, atime_ns) + if support_atime: + self.assertEqual(st.st_atime_ns, atime_ns) self.assertEqual(st.st_mtime_ns, mtime_ns) def test_utime(self): _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
