'Error case: volume-size < snapshot-size(MSGID0617-E).'

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

    self.assertRaises(exception.VSPError, self.driver.create_volume_from_snapshot, TEST_VOLUME[0], TEST_SNAPSHOT[1])
