// overlappingStatefulSets sorts a list of StatefulSets by creation timestamp, using their names as a tie breaker.
// Generally used to tie break between StatefulSets that have overlapping selectors.
type overlappingStatefulSets []*apps.StatefulSet

func (o overlappingStatefulSets) Len() int { return len(o) }

func (o overlappingStatefulSets) Swap(i, j int) { o[i], o[j] = o[j], o[i] }

	}
	sort.Sort(overlappingStatefulSets(sets))
	if !sort.IsSorted(overlappingStatefulSets(sets)) {
		t.Error("ascendingOrdinal fails to sort Pods")
	}
	for i, v := range perm {
		sets[i] = newStatefulSet(10)
		sets[i].Name = strconv.FormatInt(int64(v), 10)
	}
	sort.Sort(overlappingStatefulSets(sets))
	if !sort.IsSorted(overlappingStatefulSets(sets)) {