},
			},
		},
		{
			name: "normal case with two spreadConstraints",
			pod: st.MakePod().Name("p").Label("foo", "").
				SpreadConstraint(1, "zone", v1.DoNotSchedule, fooSelector, nil, nil, nil, nil).
				SpreadConstraint(1, "node", v1.DoNotSchedule, fooSelector, nil, nil, nil, nil).
				Obj(),
			nodes: []*v1.Node{
				st.MakeNode().Name("node-a").Label("zone", "zone1").Label("node", "node-a").Obj(),

				DefaultConstraints: []v1.TopologySpreadConstraint{
					{
						MaxSkew:           1,
						TopologyKey:       "node",
						WhenUnsatisfiable: v1.DoNotSchedule,
					},
					{
						MaxSkew:           2,
						TopologyKey:       "node",
						WhenUnsatisfiable: v1.DoNotSchedule,
					},
				},
				DefaultingType: config.ListDefaulting,
			},
			wantErrs: field.ErrorList{
				&field.Error{

			pod.Spec.TopologySpreadConstraints,
			pod.Labels,
			v1.DoNotSchedule,
		)
		if err != nil {
			return nil, fmt.Errorf("obtaining pod's hard topology spread constraints: %w", err)
		}
	} else {
		constraints, err = pl.buildDefaultConstraints(pod, v1.DoNotSchedule)
		if err != nil {
			return nil, fmt.Errorf("setting default hard topology spread constraints: %w", err)
		}

					{
						TopologyKey:       "planet",
						WhenUnsatisfiable: v1.DoNotSchedule,
						MaxSkew:           2,
					},
				},
			},
			want: &configv1.PodTopologySpreadArgs{
				DefaultConstraints: []v1.TopologySpreadConstraint{
					{
						TopologyKey:       "planet",
						WhenUnsatisfiable: v1.DoNotSchedule,
						MaxSkew:           2,
					},
				},

			{
				WhenUnsatisfiable: api.DoNotSchedule,
				TopologyKey:       "kubernetes.io/hostname",
				MaxSkew:           1,
			},
		}
		defaultConstraints = []api.TopologySpreadConstraint{
			{
				NodeAffinityPolicy: &honor,
				NodeTaintsPolicy:   &ignore,
				WhenUnsatisfiable:  api.DoNotSchedule,
				TopologyKey:        "kubernetes.io/hostname",

			testPods: []*v1.Pod{
				st.MakePod().Name("p").UID("p").Label("foo", "").Priority(highPriority).
					SpreadConstraint(1, "zone", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj(), nil, nil, nil, nil).
					SpreadConstraint(1, "hostname", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj(), nil, nil, nil, nil).
					Obj(),
			},
			initPods: []*v1.Pod{

			TopologyKey:       "k8s.io/zone",
			WhenUnsatisfiable: core.DoNotSchedule,
			MinDomains:        utilpointer.Int32(3),
		}},
		wantFieldErrors: field.ErrorList{},
	}, {
		name: "missing MaxSkew",
		constraints: []core.TopologySpreadConstraint{
			{TopologyKey: "k8s.io/zone", WhenUnsatisfiable: core.DoNotSchedule},
		},

// unsatisfiable constraint.
type UnsatisfiableConstraintAction string

const (
	// DoNotSchedule instructs the scheduler not to schedule the pod
	// when constraints are not satisfied.
	DoNotSchedule UnsatisfiableConstraintAction = "DoNotSchedule"
	// ScheduleAnyway instructs the scheduler to schedule the pod
	// even if constraints are not satisfied.

				),
				tf.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
			},
			nodes: []string{"node1", "node2"},
			pod: st.MakePod().Name("p").UID("p").Label("foo", "").SpreadConstraint(1, "hostname", v1.DoNotSchedule, &metav1.LabelSelector{
				MatchExpressions: []metav1.LabelSelectorRequirement{
					{
						Key:      "foo",
						Operator: metav1.LabelSelectorOpExists,
					},
				},

}

// +enum
type UnsatisfiableConstraintAction string

const (
	// DoNotSchedule instructs the scheduler not to schedule the pod
	// when constraints are not satisfied.
	DoNotSchedule UnsatisfiableConstraintAction = "DoNotSchedule"
	// ScheduleAnyway instructs the scheduler to schedule the pod
	// even if constraints are not satisfied.