'L{TwistOptions.opt_version} exits with L{ExitStatus.EX_OK} and prints
the version.'

def test_version(self):

    self.patchExit()
    options = TwistOptions()
    options.opt_version()
    self.assertEquals(self.exit.status, ExitStatus.EX_OK)
    self.assertEquals(self.exit.message, version)
