func (handler *deviceHandler) FindSlaveDevicesOnMultipath(disk string) []string {
	out := []string{}
	return out
}

// GetISCSIPortalHostMapForTarget unsupported returns nil
func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (map[string]int, error) {
	portalHostMap := make(map[string]int)
	return portalHostMap, nil
}

// FindDevicesForISCSILun unsupported returns nil

*/

package util

// DeviceUtil is a util for common device methods
type DeviceUtil interface {
	FindMultipathDeviceForDevice(disk string) string
	FindSlaveDevicesOnMultipath(disk string) []string
	GetISCSIPortalHostMapForTarget(targetIqn string) (map[string]int, error)
	FindDevicesForISCSILun(targetIqn string, lun int) ([]string, error)
}

type deviceHandler struct {
	getIo IoUtil
}

		}
	}
	return devices
}

// GetISCSIPortalHostMapForTarget given a target iqn, find all the scsi hosts logged into
// that target. Returns a map of iSCSI portals (string) to SCSI host numbers (integers).
//
//	For example: {
//	   "192.168.30.7:3260": 2,
//	   "192.168.30.8:3260": 3,
//	}
func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (map[string]int, error) {

	}
}

func TestGetISCSIPortalHostMapForTarget(t *testing.T) {
	mockDeviceUtil := NewDeviceHandler(&mockOsIOHandler{})
	portalHostMap, err := mockDeviceUtil.GetISCSIPortalHostMapForTarget("target1")
	if err != nil {
		t.Fatalf("error getting scsi hosts for target: %v", err)
	}
	if portalHostMap == nil {
		t.Fatal("no portal host map returned")
	}
	if len(portalHostMap) != 1 {

	defer b.plugin.targetLocks.UnlockKey(b.Iqn)

	// Build a map of SCSI hosts for each target portal. We will need this to
	// issue the bus rescans.
	portalHostMap, err := b.deviceUtil.GetISCSIPortalHostMapForTarget(b.Iqn)
	if err != nil {
		return "", err
	}
	klog.V(4).Infof("AttachDisk portal->host map for %s is %v", b.Iqn, portalHostMap)

	for i := 1; i <= maxAttachAttempts; i++ {