def METHOD_NAME(self):
    """
    Test that SUPERADMINS can edit the notification text.
    """
    # Create a SUPERUSER login.
    self.sessionToken = self.auth_client.performLogin("Username:Password",
                                                      "root:root")
    ret = self.auth_client.addPermission(Permission.SUPERUSER,
                                         "root",
                                         False,
                                         "")
    self.assertTrue(ret)
    # we got the permission
    su_auth_client = \
        env.setup_auth_client(self._test_workspace,
                              session_token=self.sessionToken)
    su_config_client = \
        env.setup_config_client(self._test_workspace,
                                session_token=self.sessionToken)
    user = su_auth_client.getLoggedInUser()
    self.assertEqual(user, "root")
    # we are root
    su_config_client.setNotificationBannerText(
            convert.to_b64('su notification'))
    self.assertEqual(convert.from_b64(
        su_config_client.getNotificationBannerText()),
            'su notification')