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

Disables two tests in the test_time suite, and adjusts test_os to reflect 
precision limits in Emscripten.
This commit is contained in:
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
View File

@ -805,14 +805,28 @@ def _test_utime(self, set_time, filename=None):
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):

4
Lib/test/test_time.py
View File

@ -116,6 +116,7 @@ def test_clock_monotonic(self):
'need time.pthread_getcpuclockid()')
@unittest.skipUnless(hasattr(time, 'clock_gettime'),
'need time.clock_gettime()')
@unittest.skipIf(support.is_emscripten, "Fails to find clock")
def test_pthread_getcpuclockid(self):
clk_id = time.pthread_getcpuclockid(threading.get_ident())
self.assertTrue(type(clk_id) is int)
@ -539,6 +540,9 @@ def test_perf_counter(self):
@unittest.skipIf(
support.is_wasi, "process_time not available on WASI"
)
@unittest.skipIf(
support.is_emscripten, "process_time present but doesn't exclude sleep"
)
def test_process_time(self):
# process_time() should not include time spend during a sleep
start = time.process_time()