// A null selector selects no pods.
	// An empty selector ({}) also selects no pods, which differs from standard behavior of selecting all pods.
	// In policy/v1, an empty selector will select all pods in the namespace.
	// +optional
	Selector *metav1.LabelSelector `json:"selector,omitempty" protobuf:"bytes,2,opt,name=selector"`

	// An eviction is allowed if at most "maxUnavailable" pods selected by

	}
}

func TestCreateUsedPVCSet(t *testing.T) {
	tests := []struct {
		name     string
		pods     []*v1.Pod
		expected sets.Set[string]
	}{
		{
			name:     "empty pods list",
			pods:     []*v1.Pod{},
			expected: sets.New[string](),
		},
		{
			name: "pods not scheduled",
			pods: []*v1.Pod{
				st.MakePod().Name("foo").Namespace("foo").Obj(),
				st.MakePod().Name("bar").Namespace("bar").Obj(),

const (
	// VolumeMounted means volume has been mounted in pod's local path
	VolumeMounted VolumeMountState = "VolumeMounted"

	// VolumeMountUncertain means volume may or may not be mounted in pods' local path
	VolumeMountUncertain VolumeMountState = "VolumeMountUncertain"

	// VolumeNotMounted means volume has not be mounted in pod's local path
	VolumeNotMounted VolumeMountState = "VolumeNotMounted"
)

// in future we may allow also inline volumes in pods.
// Exactly one member can be set.
message VolumeAttachmentSource {
  // persistentVolumeName represents the name of the persistent volume to attach.
  // +optional
  optional string persistentVolumeName = 1;

  // inlineVolumeSpec contains all the information necessary to attach
  // a persistent volume defined by a pod's inline VolumeSource. This field

				makeGCSandbox(pods[1], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, false, 0),
				// exited sandbox without containers for deleted pods.
				makeGCSandbox(pods[2], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, false, true, 0),
			},
			containers: []containerTemplate{
				{pod: pods[1], container: &pods[1].Spec.Containers[0], sandboxAttempt: 1, state: runtimeapi.ContainerState_CONTAINER_EXITED},
			},

  // can be scaled down further, followed by scaling up the new ReplicaSet, ensuring
  // that the total number of pods available at all times during the update is at
  // least 70% of desired pods.
  // +optional
  optional .k8s.io.apimachinery.pkg.util.intstr.IntOrString maxUnavailable = 1;

  // The maximum number of pods that can be scheduled above the desired number of
  // pods.

	type test struct {
		name    string
		manager *PodControllerRefManager
		pods    []*v1.Pod
		claimed []*v1.Pod
		patches int
	}
	var tests = []test{
		func() test {
			controller := v1.ReplicationController{}
			controller.Namespace = metav1.NamespaceDefault
			return test{
				name: "Claim pods with correct label",
				manager: NewPodControllerRefManager(&FakePodControl{},
					&controller,

  // can have their pods stopped for an update at any given time. The update
  // starts by stopping at most 30% of those DaemonSet pods and then brings
  // up new DaemonSet pods in their place. Once the new pods are available,
  // it then proceeds onto other DaemonSet pods, thus ensuring that at least
  // 70% of original number of DaemonSet pods are available at all times during
  // the update.

  // can have their pods stopped for an update at any given time. The update
  // starts by stopping at most 30% of those DaemonSet pods and then brings
  // up new DaemonSet pods in their place. Once the new pods are available,
  // it then proceeds onto other DaemonSet pods, thus ensuring that at least
  // 70% of original number of DaemonSet pods are available at all times during
  // the update.

		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      container.Name,
			Namespace: metav1.NamespaceSystem,
			// The component and tier labels are useful for quickly identifying the control plane Pods when doing a .List()
			// against Pods in the kube-system namespace. Can for example be used together with the WaitForPodsWithLabel function
			Labels:      map[string]string{"component": container.Name, "tier": kubeadmconstants.ControlPlaneTier},