symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_wait4.py
changeset 1 2fb8b9db1c86
equal deleted inserted replaced
0:ffa851df0825 1:2fb8b9db1c86
       
     1 """This test checks for correct wait4() behavior.
       
     2 """
       
     3 
       
     4 import os
       
     5 import time
       
     6 from test.fork_wait import ForkWait
       
     7 from test.test_support import TestSkipped, run_unittest, reap_children
       
     8 
       
     9 try:
       
    10     os.fork
       
    11 except AttributeError:
       
    12     raise TestSkipped, "os.fork not defined -- skipping test_wait4"
       
    13 
       
    14 try:
       
    15     os.wait4
       
    16 except AttributeError:
       
    17     raise TestSkipped, "os.wait4 not defined -- skipping test_wait4"
       
    18 
       
    19 class Wait4Test(ForkWait):
       
    20     def wait_impl(self, cpid):
       
    21         for i in range(10):
       
    22             # wait4() shouldn't hang, but some of the buildbots seem to hang
       
    23             # in the forking tests.  This is an attempt to fix the problem.
       
    24             spid, status, rusage = os.wait4(cpid, os.WNOHANG)
       
    25             if spid == cpid:
       
    26                 break
       
    27             time.sleep(1.0)
       
    28         self.assertEqual(spid, cpid)
       
    29         self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
       
    30         self.assertTrue(rusage)
       
    31 
       
    32 def test_main():
       
    33     run_unittest(Wait4Test)
       
    34     reap_children()
       
    35 
       
    36 if __name__ == "__main__":
       
    37     test_main()