// strings.
func reasonNames(reasons ConflictReasons) string {
	var varNames []string
	for _, reason := range reasons {
		switch reason {
		case ErrReasonBindConflict:
			varNames = append(varNames, "ErrReasonBindConflict")
		case ErrReasonNodeConflict:
			varNames = append(varNames, "ErrReasonNodeConflict")
		case ErrReasonNotEnoughSpace:
			varNames = append(varNames, "ErrReasonNotEnoughSpace")

				},
				podVolumesByNode: map[string]*PodVolumes{},
			},
			wantFilterStatus: []*framework.Status{
				framework.NewStatus(framework.UnschedulableAndUnresolvable, string(ErrReasonBindConflict)),
			},
			wantPreScoreStatus: framework.NewStatus(framework.Skip),
		},
		{
			name: "bound and unbound unsatisfied",
			pod:  makePod("pod-a").withPVCVolume("pvc-a", "").withPVCVolume("pvc-b", "").Pod,

func (reasons ConflictReasons) Swap(i, j int)      { reasons[i], reasons[j] = reasons[j], reasons[i] }

const (
	// ErrReasonBindConflict is used for VolumeBindingNoMatch predicate error.
	ErrReasonBindConflict ConflictReason = "node(s) didn't find available persistent volumes to bind"
	// ErrReasonNodeConflict is used for VolumeNodeAffinityConflict predicate error.

				"node2": framework.NewStatus(framework.UnschedulableAndUnresolvable, string(volumebinding.ErrReasonNodeConflict)),
				"node3": framework.NewStatus(framework.UnschedulableAndUnresolvable, string(volumebinding.ErrReasonBindConflict)),
				"node4": framework.NewStatus(framework.Unschedulable, "Unschedulable"),
			},
			expected: sets.New("node4"),
		},
		{

		},
		{
			name: "unbound/no matches",
			volumeBinderConfig: &volumebinding.FakeVolumeBinderConfig{
				FindReasons: volumebinding.ConflictReasons{volumebinding.ErrReasonBindConflict},
			},
			eventReason: "FailedScheduling",
			expectError: makePredicateError("1 node(s) didn't find available persistent volumes to bind"),
		},
		{
			name: "bound and unbound unsatisfied",