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gh-127146: Some expected failures in Emscripten time tests (#127843)

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Disables two tests in the test_time suite, and adjusts test_os to reflect 
precision limits in Emscripten.
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Hood Chatham 2024-12-12 02:11:00 +01:00 • committed by GitHub
parent c84928ed6d
commit 41f29e5d16
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2 changed files with 25 additions and 7 deletions
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28
Lib/test/test_os.py
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@ -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):