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"""This test checks for correct wait3() behavior.
"""
import os
import time
import unittest
from test.fork_wait import ForkWait
from test.support import reap_children
if not hasattr(os, 'fork'):
raise unittest.SkipTest("os.fork not defined")
if not hasattr(os, 'wait3'):
raise unittest.SkipTest("os.wait3 not defined")
class Wait3Test(ForkWait):
def wait_impl(self, cpid):
# This many iterations can be required, since some previously run
# tests (e.g. test_ctypes) could have spawned a lot of children
# very quickly.
deadline = time.monotonic() + 10.0
while time.monotonic() <= deadline:
# wait3() shouldn't hang, but some of the buildbots seem to hang
# in the forking tests. This is an attempt to fix the problem.
spid, status, rusage = os.wait3(os.WNOHANG)
if spid == cpid:
break
time.sleep(0.1)
self.assertEqual(spid, cpid)
self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
self.assertTrue(rusage)
def tearDownModule():
reap_children()
if __name__ == "__main__":
unittest.main()
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