ResponseNonce:            nonce,
			ResourceNamesSubscribe:   add,
			ResourceNamesUnsubscribe: remove,
		})
		nonce = res.Nonce
		got := xdstest.MapKeys(xdstest.ExtractLoadAssignments(xdstest.UnmarshalClusterLoadAssignment(t, xdsserver.ResourcesToAny(res.Resources))))
		if !reflect.DeepEqual(expect, got) {
			t.Fatalf("expected clusters %v got %v", expect, got)
		}
	}