}},
				},
			},
			required: []corev1.ResourceName{corev1.ResourceMemory, corev1.ResourceCPU},
			err:      `must specify cpu for: bar,foo; memory for: bar,foo`,
		},
	}
	evaluator := NewPodEvaluator(nil, clock.RealClock{})
	for testName, test := range testCases {
		err := evaluator.Constraints(test.required, test.pod)
		switch {
		case err != nil && len(test.err) == 0,
			err == nil && len(test.err) != 0,

	string(corev1.ResourceRequestsCPU),
	string(corev1.ResourceRequestsMemory),
	string(corev1.ResourceLimitsCPU),
	string(corev1.ResourceLimitsMemory),
)

// NewPodEvaluator returns an evaluator that can evaluate pods
func NewPodEvaluator(f quota.ListerForResourceFunc, clock clock.Clock) quota.Evaluator {
	listFuncByNamespace := generic.ListResourceUsingListerFunc(f, corev1.SchemeGroupVersion.WithResource("pods"))