test_posix.py 文件源码

def test_getgroups(self):
        with os.popen('id -G') as idg:
            groups = idg.read().strip()
            ret = idg.close()

        if ret is not None or not groups:
            raise unittest.SkipTest("need working 'id -G'")

        # Issues 16698: OS X ABIs prior to 10.6 have limits on getgroups()
        if sys.platform == 'darwin':
            import sysconfig
            dt = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET') or '10.0'
            if float(dt) < 10.6:
                raise unittest.SkipTest("getgroups(2) is broken prior to 10.6")

        # 'id -G' and 'os.getgroups()' should return the same
        # groups, ignoring order and duplicates.
        # #10822 - it is implementation defined whether posix.getgroups()
        # includes the effective gid so we include it anyway, since id -G does
        self.assertEqual(
                set([int(x) for x in groups.split()]),
                set(posix.getgroups() + [posix.getegid()]))

    # tests for the posix *at functions follow