set: mkStatefulSet(&validPodTemplate,
			tweakReplicas(3),
			tweakUpdateStrategyType("foo"),
		),
		errs: field.ErrorList{
			field.Invalid(field.NewPath("spec", "updateStrategy"), nil, ""),
		},
	}, {
		name: "empty update strategy",
		set: mkStatefulSet(&validPodTemplate,
			tweakReplicas(3),
			tweakUpdateStrategyType(""),
		),
		errs: field.ErrorList{