set.Status.CollisionCount = new(int32)
	currentSet := set.DeepCopy()
	currentRevision, err := newRevision(set, 1, set.Status.CollisionCount)
	if err != nil {
		t.Fatal(err)
	}

	set.Spec.Template.Spec.Containers[0].Env = []v1.EnvVar{{Name: "foo", Value: "bar"}}
	updateSet := set.DeepCopy()
	updateRevision, err := newRevision(set, 2, set.Status.CollisionCount)
	if err != nil {
		t.Fatal(err)
	}