test: update tests

apps/emqx_prometheus/test/emqx_prometheus_data_SUITE.erl

@@ -336,6 +336,7 @@ metric_meta(<<"emqx_vm_total_memory">>) -> ?meta(0, 1, 1);
 metric_meta(<<"emqx_vm_used_memory">>) -> ?meta(0, 1, 1);
 metric_meta(<<"emqx_cluster_nodes_running">>) -> ?meta(0, 1, 1);
 metric_meta(<<"emqx_cluster_nodes_stopped">>) -> ?meta(0, 1, 1);
+metric_meta(<<"emqx_cluster_rpc_txid">>) -> ?meta(0, 1, 1);
 %% END
 metric_meta(<<"emqx_cert_expiry_at">>) -> ?meta(2, 2, 2);
 metric_meta(<<"emqx_license_expiry_at">>) -> ?meta(0, 0, 0);
@@ -641,7 +642,17 @@ assert_json_data__certs(Ms, _) ->
         Ms
     ).
 
-assert_json_data__cluster_rpc(Ms, _Mode) ->
+assert_json_data__cluster_rpc(Ms, Mode) when
+    Mode =:= ?PROM_DATA_MODE__NODE;
+    Mode =:= ?PROM_DATA_MODE__ALL_NODES_AGGREGATED
+->
+    ?assertMatch(
+        #{
+            emqx_cluster_rpc_txid := _
+        },
+        Ms
+    );
+assert_json_data__cluster_rpc(Ms, ?PROM_DATA_MODE__ALL_NODES_UNAGGREGATED) ->
     lists:foreach(
         fun(M) ->
             ?assertMatch(