lib-python.2.7.test.test_wait4.py Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jython-standalone Show documentation

Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

The newest version!

"""This test checks for correct wait4() behavior.
"""

import os
import time
from test.fork_wait import ForkWait
from test.test_support import run_unittest, 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):
        for i in range(10):
            # 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, os.WNOHANG)
            if spid == cpid:
                break
            time.sleep(1.0)
        self.assertEqual(spid, cpid)
        self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
        self.assertTrue(rusage)

def test_main():
    run_unittest(Wait4Test)
    reap_children()

if __name__ == "__main__":
    test_main()