'Error case: No unused LDEV exists(MSGID0648-E).'

@mock.patch.object(vsp_utils, 'execute', side_effect=_execute)
def test_create_volume_free_ldev_not_found_on_storage(self, execute):

    self.driver.common.storage_info['ldev_range'] = [0, 0]
    self.assertRaises(exception.VSPError, self.driver.create_volume, TEST_VOLUME[0])
