if err != nil {
		panic(err)
	}
	return ret
}

// FakeNodeInformer creates a fakeNodeInformer using the provided fakeNodeHandler.
func FakeNodeInformer(fakeNodeHandler *testutil.FakeNodeHandler) coreinformers.NodeInformer {
	fakeClient := &fake.Clientset{}
	fakeInformerFactory := informers.NewSharedInformerFactory(fakeClient, controller.NoResyncPeriodFunc())
	fakeNodeInformer := fakeInformerFactory.Core().V1().Nodes()

	for _, tc := range testCases {
		t.Run(tc.description, func(t *testing.T) {
			// Initialize the range allocator.
			fakeNodeInformer := test.FakeNodeInformer(tc.fakeNodeHandler)
			nodeList, _ := tc.fakeNodeHandler.List(tCtx, metav1.ListOptions{})
			_, err := NewCIDRRangeAllocator(tCtx, tc.fakeNodeHandler, fakeNodeInformer, tc.allocatorParams, nodeList)
			if err == nil && tc.ctrlCreateFail {