'Error case: \'extend ldev\' returns an error(MSGID0600-E).'

@mock.patch.object(utils, 'execute', side_effect=_cinder_execute)
@mock.patch.object(vsp_horcm, '_EXTEND_WAITTIME', 1)
@mock.patch.object(vsp_horcm, '_EXEC_RETRY_INTERVAL', 1)
def test_extend_volume_raidcom_error(self, execute):

    self.assertRaises(exception.VSPError, self.driver.extend_volume, TEST_VOLUME[3], 256)
