p.Spec.Affinity = &v1.Affinity{}
	}
	if p.Spec.Affinity.PodAffinity == nil {
		p.Spec.Affinity.PodAffinity = &v1.PodAffinity{}
	}
	term := v1.PodAffinityTerm{LabelSelector: labelSelector, TopologyKey: topologyKey}
	switch kind {
	case PodAffinityWithRequiredReq:
		p.Spec.Affinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution = append(
			p.Spec.Affinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution,
			term,

	}
	podLabelSecurityS2 := map[string]string{
		"security": "S2",
	}
	// considered only preferredDuringSchedulingIgnoredDuringExecution in pod affinity
	stayWithS1InRegion := &v1.Affinity{
		PodAffinity: &v1.PodAffinity{
			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
				{
					Weight: 5,
					PodAffinityTerm: v1.PodAffinityTerm{
						LabelSelector: &metav1.LabelSelector{

			},
		},
		"CrossNamespaceRequiredAffinity": {
			pod: &api.Pod{
				Spec: api.PodSpec{
					ActiveDeadlineSeconds: &activeDeadlineSeconds,
					Affinity: &api.Affinity{
						PodAffinity: &api.PodAffinity{
							RequiredDuringSchedulingIgnoredDuringExecution: []api.PodAffinityTerm{
								{LabelSelector: &metav1.LabelSelector{}, Namespaces: []string{"ns1"}, NamespaceSelector: &metav1.LabelSelector{}},
							},

	if affinity != nil && affinity.PodAffinity != nil {
		if len(affinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution) != 0 {
			terms = affinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution
		}
		// TODO: Uncomment this block when implement RequiredDuringSchedulingRequiredDuringExecution.
		// if len(affinity.PodAffinity.RequiredDuringSchedulingRequiredDuringExecution) != 0 {

	}

	if podSpec.Affinity != nil {
		if affinity := podSpec.Affinity.PodAffinity; affinity != nil {
			warnings = append(warnings, warningsForPodAffinityTerms(affinity.RequiredDuringSchedulingIgnoredDuringExecution, fieldPath.Child("spec", "affinity", "podAffinity", "requiredDuringSchedulingIgnoredDuringExecution"))...)

	if spec.Affinity != nil {
		if spec.Affinity.PodAffinity != nil {
			for _, term := range spec.Affinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution {
				allErrs := apivalidation.ValidatePodAffinityTermSelector(term, false, nil)
				if len(allErrs) != 0 {
					return true
				}
			}
			for _, term := range spec.Affinity.PodAffinity.PreferredDuringSchedulingIgnoredDuringExecution {

			},
		},
		{
			name: "null LabelSelector in PodAffinity",
			template: &api.PodTemplateSpec{
				ObjectMeta: metav1.ObjectMeta{},
				Spec: api.PodSpec{
					Affinity: &api.Affinity{
						PodAffinity: &api.PodAffinity{
							RequiredDuringSchedulingIgnoredDuringExecution: []api.PodAffinityTerm{
								{

		return framework.NewStatus(framework.Error, "empty shared lister in InterPodAffinity PreScore")
	}

	affinity := pod.Spec.Affinity
	hasPreferredAffinityConstraints := affinity != nil && affinity.PodAffinity != nil && len(affinity.PodAffinity.PreferredDuringSchedulingIgnoredDuringExecution) > 0

	podsWithAffitiny := []*v1.Pod{
		st.MakePod().Name("bar").Namespace("ns").PodAffinity("baz", &metav1.LabelSelector{MatchLabels: map[string]string{"baz": "qux"}}, st.PodAffinityWithRequiredReq).Node("node-2").Obj(),
		st.MakePod().Name("bar").Namespace("ns").PodAffinity("key", &metav1.LabelSelector{MatchLabels: map[string]string{"key": "value"}}, st.PodAffinityWithRequiredReq).Node("node-0").Obj(),
	}

	// Note that, we don't need to check each affinity individually when the Pod has more than one affinity
	// because the current PodAffinity looks for a **single** existing pod that can satisfy **all** the terms of inter-pod affinity of an incoming pod.
	if modifiedPod != nil && originalPod != nil {