/Lib/test/test_wait4.py
http://unladen-swallow.googlecode.com/ · Python · 37 lines · 27 code · 6 blank · 4 comment · 7 complexity · a97de02aaa47696bf6c17288a9c4bb2e MD5 · raw file
- """This test checks for correct wait4() behavior.
- """
- import os
- import time
- from test.fork_wait import ForkWait
- from test.test_support import TestSkipped, run_unittest, reap_children
- try:
- os.fork
- except AttributeError:
- raise TestSkipped, "os.fork not defined -- skipping test_wait4"
- try:
- os.wait4
- except AttributeError:
- raise TestSkipped, "os.wait4 not defined -- skipping test_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()