if strings.HasPrefix(mountpoint, "/quota2") {
		return testVolumeQuota{}
	}
	return nil
}

func (v testVolumeQuota) SetQuotaOnDir(dir string, id common.QuotaID, _ int64) error {
	odir, ok := testIDQuotaMap[id]
	if ok && dir != odir {
		return fmt.Errorf("ID %v is already in use", id)
	}
	oid, ok := testQuotaIDMap[dir]
	if ok && id != oid {