def test_sysexec(self):

       x = py.path.local.sysfind('ls') 

->     out = x.sysexec('-a')

       for x in py.path.local().listdir(): 

           assert out.find(x.basename) != -1

   def sysexec(self, *argv):

       """ return stdout-put from executing a system child process,

               where the self path points to the binary (XXX or script)

               to be executed. Note that this process is directly

               invoked and not through a system shell.

           """

       from py.compat.subprocess import Popen, PIPE

       argv = map(str, argv)

       proc = Popen([str(self)] + list(argv), stdout=PIPE, stderr=PIPE)

       stdout, stderr = proc.communicate()

->     ret = proc.wait()

       if ret != 0:

           raise py.process.cmdexec.Error(ret, ret, str(self),

                                          stdout, stderr,)

       return stdout