diff options
Diffstat (limited to 'Lib/test/test_os.py')
| -rw-r--r-- | Lib/test/test_os.py | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py index f3d2ceb..8aac929 100644 --- a/Lib/test/test_os.py +++ b/Lib/test/test_os.py @@ -805,14 +805,28 @@ class UtimeTests(unittest.TestCase): set_time(filename, (atime_ns, mtime_ns)) st = os.stat(filename) - if support_subsecond: - self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-6) - self.assertAlmostEqual(st.st_mtime, mtime_ns * 1e-9, delta=1e-6) + if support.is_emscripten: + # Emscripten timestamps are roundtripped through a 53 bit integer of + # nanoseconds. If we want to represent ~50 years which is an 11 + # digits number of seconds: + # 2*log10(60) + log10(24) + log10(365) + log10(60) + log10(50) + # is about 11. Because 53 * log10(2) is about 16, we only have 5 + # 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) + 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: - 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) - self.assertEqual(st.st_mtime_ns, mtime_ns) + if support_subsecond: + 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) + self.assertEqual(st.st_mtime, mtime_ns * 1e-9) + self.assertEqual(st.st_atime_ns, atime_ns) + self.assertEqual(st.st_mtime_ns, mtime_ns) def test_utime(self): def set_time(filename, ns): |