cpython/Lib/test/test_wait4.py
Zachary Ware 38c707e7e0 Issue #21741: Update 147 test modules to use test discovery.
I have compared output between pre- and post-patch runs of these tests
to make sure there's nothing missing and nothing broken, on both
Windows and Linux.  The only differences I found were actually tests
that were previously *not* run.
2015-04-13 15:00:43 -05:00

38 lines
1.1 KiB
Python

"""This test checks for correct wait4() behavior.
"""
import os
import time
import sys
from test.fork_wait import ForkWait
from test.support import reap_children, get_attribute
# If either of these do not exist, skip this test.
get_attribute(os, 'fork')
get_attribute(os, 'wait4')
class Wait4Test(ForkWait):
def wait_impl(self, cpid):
option = os.WNOHANG
if sys.platform.startswith('aix'):
# Issue #11185: wait4 is broken on AIX and will always return 0
# with WNOHANG.
option = 0
deadline = time.monotonic() + 10.0
while time.monotonic() <= deadline:
# wait4() 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.wait4(cpid, option)
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()