}
	enabled := true
	disabled := false
	gcp := "gcp"
	noneFsGroupPolicy := storage.NoneFSGroupPolicy
	readWriteOnceWithFSTypeFSGroupPolicy := storage.ReadWriteOnceWithFSTypeFSGroupPolicy
	fileFSGroupPolicy := storage.FileFSGroupPolicy
	driverWithPodInfoOnMountEnabled := &storage.CSIDriver{
		ObjectMeta: metav1.ObjectMeta{
			Name: "foo",
		},
		Spec: storage.CSIDriverSpec{
			PodInfoOnMount: &enabled,
		},
	}

		args   args
		want   bool
	}{
		{
			name: "empty all",
			args: args{},
			want: false,
		},
		{
			name: "driverPolicy is FileFSGroupPolicy",
			args: args{
				fsGroup:      new(int64),
				driverPolicy: storage.FileFSGroupPolicy,
			},
			want: true,
		},
		{
			name: "driverPolicy is ReadWriteOnceWithFSTypeFSGroupPolicy",
			args: args{
				fsGroup:      new(int64),

			new.Spec.PodInfoOnMount = &podInfoOnMount
		},
	}, {
		name: "change FSGroupPolicy",
		modify: func(new *storage.CSIDriver) {
			fileFSGroupPolicy := storage.FileFSGroupPolicy
			new.Spec.FSGroupPolicy = &fileFSGroupPolicy
		},
	}}
	for _, test := range successCases {
		t.Run(test.name, func(t *testing.T) {
			new := old.DeepCopy()
			test.modify(new)

	// This is the default behavior if no other FSGroupPolicy is defined.
	ReadWriteOnceWithFSTypeFSGroupPolicy FSGroupPolicy = "ReadWriteOnceWithFSType"

	// FileFSGroupPolicy indicates that CSI driver supports volume ownership
	// and permission change via fsGroup, and Kubernetes will change the permissions
	// and ownership of every file in the volume to match the user requested fsGroup in

	// This is the default behavior if no other FSGroupPolicy is defined.
	ReadWriteOnceWithFSTypeFSGroupPolicy FSGroupPolicy = "ReadWriteOnceWithFSType"

	// FileFSGroupPolicy indicates that CSI driver supports volume ownership
	// and permission change via fsGroup, and Kubernetes will change the permissions
	// and ownership of every file in the volume to match the user requested fsGroup in

	// This is the default behavior if no other FSGroupPolicy is defined.
	ReadWriteOnceWithFSTypeFSGroupPolicy FSGroupPolicy = "ReadWriteOnceWithFSType"

	// FileFSGroupPolicy indicates that CSI driver supports volume ownership
	// and permission change via fsGroup, and Kubernetes will change the permissions
	// and ownership of every file in the volume to match the user requested fsGroup in

	if fsGroup == nil || driverPolicy == storage.NoneFSGroupPolicy || c.readOnly {
		return false
	}

	if driverPolicy == storage.FileFSGroupPolicy {
		return true
	}

	if fsType == "" {
		klog.V(4).Info(log("mounter.SetupAt WARNING: skipping fsGroup, fsType not provided"))
		return false
	}

	if c.spec.PersistentVolume != nil {

		allErrs = append(allErrs, field.Required(fldPath, ""))
	}

	return allErrs
}

var supportedFSGroupPolicy = sets.NewString(string(storage.ReadWriteOnceWithFSTypeFSGroupPolicy), string(storage.FileFSGroupPolicy), string(storage.NoneFSGroupPolicy))

// validateFSGroupPolicy tests if FSGroupPolicy contains an appropriate value.
func validateFSGroupPolicy(fsGroupPolicy *storage.FSGroupPolicy, fldPath *field.Path) field.ErrorList {