},
		"Matched ref": {
			mountRefs:    []string{filepath.Join(path, "lish")},
			expectedPath: "lish",
		},
	}

	for name, tc := range testCases {
		t.Run(name, func(t *testing.T) {
			mounter := &fakeMounter{
				mountRefs:  tc.mountRefs,
				raiseError: tc.raiseError,
			}

			path, err := hu.GetDeviceNameFromMount(mounter, path, path)
			if tc.expectedError != "" {

			}
		})
	}
}

func TestHasMountRefs(t *testing.T) {
	testCases := map[string]struct {
		mountPath string
		mountRefs []string
		expected  bool
	}{
		"plugin mounts only": {
			mountPath: "/var/lib/kubelet/plugins/kubernetes.io/some-plugin/mounts/volume-XXXX",
			mountRefs: []string{
				"/home/somewhere/var/lib/kubelet/plugins/kubernetes.io/some-plugin/mounts/volume-XXXX",

		refs, err := fm.GetMountRefs(path)
		if err != nil {
			t.Errorf("couldn't get mountrefs. err: %v", err)
		}
		var globalPDPath string
		for _, ref := range refs {
			if strings.Contains(ref, "kubernetes.io/fc") {
				globalPDPath = ref
				break
			}
		}
		if len(globalPDPath) == 0 {
			t.Errorf("couldn't fetch mountrefs")
		}
		arr := strings.Split(globalPDPath, "/")
		if len(arr) < 1 {

			fsUser = nil
			return false
		}
		if fsUser == nil {
			fsUser = runAsUser
		}
		return true
	})
	return fsUser
}

// HasMountRefs checks if the given mountPath has mountRefs.
// TODO: this is a workaround for the unmount device issue caused by gci mounter.
// In GCI cluster, if gci mounter is used for mounting, the container started by mounter

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"

	MNT_WANTRDWR                      = 0x2000000
	MNT_WXALLOWED                     = 0x800
	MOUNT_AFS                         = "afs"
	MOUNT_CD9660                      = "cd9660"
	MOUNT_EXT2FS                      = "ext2fs"
	MOUNT_FFS                         = "ffs"
	MOUNT_FUSEFS                      = "fuse"
	MOUNT_MFS                         = "mfs"
	MOUNT_MSDOS                       = "msdos"