Method check_chmod

Lib/test/test_os/test_posix.py:1056–1076

(self, chmod_func, target, **kwargs)

        posix.utime(os_helper.TESTFN, (now, now))

    def check_chmod(self, chmod_func, target, **kwargs):
        closefd = not isinstance(target, int)
        mode = os.stat(target).st_mode
        try:
            new_mode = mode & ~(stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
            chmod_func(target, new_mode, **kwargs)
            self.assertEqual(os.stat(target).st_mode, new_mode)
            if stat.S_ISREG(mode):
                try:
                    with open(target, 'wb+', closefd=closefd):
                        pass
                except PermissionError:
                    pass
            new_mode = mode | (stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
            chmod_func(target, new_mode, **kwargs)
            self.assertEqual(os.stat(target).st_mode, new_mode)
            if stat.S_ISREG(mode):
                with open(target, 'wb+', closefd=closefd):
                    pass
        finally:
            chmod_func(target, mode)

    @os_helper.skip_unless_working_chmod
    def test_chmod_file(self):