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0d63bacefd
Replace hardcoded timeout constants in tests with SHORT_TIMEOUT of test.support, so it's easier to ajdust this timeout for all tests at once. SHORT_TIMEOUT is 30 seconds by default, but it can be longer depending on --timeout command line option. The change makes almost all timeouts longer, except test_reap_children() of test_support which is made 2x shorter: SHORT_TIMEOUT should be enough. If this test starts to fail, LONG_TIMEOUT should be used instead. Uniformize also "from test import support" import in some test files.
56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
"""This test checks for correct wait3() behavior.
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"""
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import os
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import subprocess
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import sys
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import time
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import unittest
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from test.fork_wait import ForkWait
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from test import support
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if not hasattr(os, 'fork'):
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raise unittest.SkipTest("os.fork not defined")
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if not hasattr(os, 'wait3'):
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raise unittest.SkipTest("os.wait3 not defined")
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class Wait3Test(ForkWait):
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def wait_impl(self, cpid):
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# This many iterations can be required, since some previously run
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# tests (e.g. test_ctypes) could have spawned a lot of children
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# very quickly.
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deadline = time.monotonic() + support.SHORT_TIMEOUT
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while time.monotonic() <= deadline:
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# wait3() shouldn't hang, but some of the buildbots seem to hang
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# in the forking tests. This is an attempt to fix the problem.
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spid, status, rusage = os.wait3(os.WNOHANG)
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if spid == cpid:
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break
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time.sleep(0.1)
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self.assertEqual(spid, cpid)
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self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
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self.assertTrue(rusage)
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def test_wait3_rusage_initialized(self):
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# Ensure a successful wait3() call where no child was ready to report
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# its exit status does not return uninitialized memory in the rusage
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# structure. See bpo-36279.
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args = [sys.executable, '-c', 'import sys; sys.stdin.read()']
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proc = subprocess.Popen(args, stdin=subprocess.PIPE)
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try:
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pid, status, rusage = os.wait3(os.WNOHANG)
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self.assertEqual(0, pid)
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self.assertEqual(0, status)
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self.assertEqual(0, sum(rusage))
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finally:
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proc.stdin.close()
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proc.wait()
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def tearDownModule():
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support.reap_children()
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if __name__ == "__main__":
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unittest.main()
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