Showing content from http://svn.python.org/projects/python/branches/twouters-dictviews-backport/Lib/test/test_fork1.py below:
"""This test checks for correct fork() 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_fork1" class ForkTest(ForkWait): def wait_impl(self, cpid): for i in range(10): # waitpid() 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 = os.waitpid(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)) def test_main(): run_unittest(ForkTest) reap_children() if __name__ == "__main__": test_main()
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