if err != nil {
		t.Error(err)
	}
}

// TestAdmissionNamespaceDoesNotExist verifies pod is not admitted if namespace does not exist.
func TestAdmissionNamespaceDoesNotExist(t *testing.T) {
	namespace := "test"
	mockClient := newMockClientForTest(map[string]v1.NamespacePhase{})

		return PodAdmitResult{
			Admit:   false,
			Reason:  "InvalidNodeInfo",
			Message: "Kubelet cannot get node info.",
		}
	}
	admitPod := attrs.Pod

	// perform the checks that preemption will not help first to avoid meaningless pod eviction
	if rejectPodAdmissionBasedOnOSSelector(admitPod, node) {
		return PodAdmitResult{
			Admit:   false,
			Reason:  "PodOSSelectorNodeLabelDoesNotMatch",

  //
  // IfNeeded: the webhook will be called at least one additional time as part of the admission evaluation
  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note:
  // * the number of additional invocations is not guaranteed to be exactly one.

  //
  // IfNeeded: the webhook will be called at least one additional time as part of the admission evaluation
  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note:
  // * the number of additional invocations is not guaranteed to be exactly one.

			expectRejection: true,
		},
		{
			name:            "No label selector on the pod, should be admitted",
			pod:             &v1.Pod{},
			node:            &v1.Node{Spec: v1.NodeSpec{}, ObjectMeta: metav1.ObjectMeta{Labels: map[string]string{v1.LabelOSStable: "dummyOS"}}},
			expectRejection: false,
		},
	}

	if p.options.FullPhysicalCPUsOnly {
		CPUsPerCore := p.topology.CPUsPerCore()
		if (numCPUs % CPUsPerCore) != 0 {
			// Since CPU Manager has been enabled requesting strict SMT alignment, it means a guaranteed pod can only be admitted
			// if the CPU requested is a multiple of the number of virtual cpus per physical cores.
			// In case CPU request is not a multiple of the number of virtual cpus per physical cores the Pod will be put

	for _, incoming := range parentResults {
		// We will append it if it is our first occurrence, or the existing one has an error. This means
		// if *any* section has no errors, we will declare Admitted
		if incoming.DeniedReason == nil {
			successCount[incoming.OriginalReference]++
		}
		seen[incoming.OriginalReference] = append(seen[incoming.OriginalReference], incoming)
		if incoming.DeniedReason != nil {

	// removing state that is newly added by an asynchronous call to
	// AddContainer() during the execution of this code.
	m.Lock()
	defer m.Unlock()

	// Get the list of admitted and active pods.
	activeAndAdmittedPods := m.activePods()
	if m.pendingAdmissionPod != nil {
		activeAndAdmittedPods = append(activeAndAdmittedPods, m.pendingAdmissionPod)
	}

		return fmt.Errorf("missing client")
	}
	if s.serviceAccountLister == nil {
		return fmt.Errorf("missing serviceAccountLister")
	}
	return nil
}

// Admit verifies if the pod should be admitted
func (s *Plugin) Admit(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) (err error) {
	if shouldIgnore(a) {
		return nil
	}
	if a.GetOperation() != admission.Create {

	// If the pod is marked as critical and static, and support for critical pod annotations is enabled,
	// do not evict such pods. Static pods are not re-admitted after evictions.
	// https://github.com/kubernetes/kubernetes/issues/40573 has more details.
	if kubelettypes.IsCriticalPod(pod) {
		klog.ErrorS(nil, "Eviction manager: cannot evict a critical pod", "pod", klog.KObj(pod))