test.SetForTest(t, &features.DeltaXds, true)
	return NewDeltaXdsTest(t, conn, func(conn *grpc.ClientConn) (DeltaDiscoveryClient, error) {
		xds := discovery.NewAggregatedDiscoveryServiceClient(conn)
		return xds.DeltaAggregatedResources(context.Background())
	})
}

func NewDeltaXdsTest(t test.Failer, conn *grpc.ClientConn,
	getClient func(conn *grpc.ClientConn) (DeltaDiscoveryClient, error),