test: fields in `/monitor_current`

- `retained_msg_count`
- `shared_subscriptions`

apps/emqx_dashboard/test/emqx_dashboard_monitor_SUITE.erl

@@ -21,24 +21,53 @@
 
 -import(emqx_dashboard_SUITE, [auth_header_/0]).
 
--include_lib("eunit/include/eunit.hrl").
 -include("emqx_dashboard.hrl").
+-include_lib("eunit/include/eunit.hrl").
 
 -define(SERVER, "http://127.0.0.1:18083").
 -define(BASE_PATH, "/api/v5").
 
+-define(BASE_RETAINER_CONF, <<
+    "retainer {\n"
+    "    enable = true\n"
+    "    msg_clear_interval = 0s\n"
+    "    msg_expiry_interval = 0s\n"
+    "    max_payload_size = 1MB\n"
+    "    flow_control {\n"
+    "        batch_read_number = 0\n"
+    "        batch_deliver_number = 0\n"
+    "     }\n"
+    "   backend {\n"
+    "        type = built_in_database\n"
+    "        storage_type = ram\n"
+    "        max_retained_messages = 0\n"
+    "     }\n"
+    "}"
+>>).
+
+%%--------------------------------------------------------------------
+%% CT boilerplate
+%%--------------------------------------------------------------------
+
 all() ->
     emqx_common_test_helpers:all(?MODULE).
 
 init_per_suite(Config) ->
-    meck:new(emqx_retainer, [non_strict, passthrough, no_history, no_link]),
+    ok = emqx_mgmt_api_test_util:init_suite([emqx, emqx_conf, emqx_retainer]),
-    meck:expect(emqx_retainer, retained_count, fun() -> 0 end),
-    emqx_mgmt_api_test_util:init_suite([]),
     Config.
 
 end_per_suite(_Config) ->
-    meck:unload([emqx_retainer]),
+    emqx_mgmt_api_test_util:end_suite([emqx_retainer]).
-    emqx_mgmt_api_test_util:end_suite([]).
+
+set_special_configs(emqx_retainer) ->
+    emqx_retainer:update_config(?BASE_RETAINER_CONF),
+    ok;
+set_special_configs(_App) ->
+    ok.
+
+%%--------------------------------------------------------------------
+%% Test Cases
+%%--------------------------------------------------------------------
 
 t_monitor_samplers_all(_Config) ->
     timer:sleep(?DEFAULT_SAMPLE_INTERVAL * 2 * 1000 + 20),
@@ -112,6 +141,65 @@ t_monitor_current_api_live_connections(_) ->
     {ok, _} = emqtt:connect(C2),
     ok = emqtt:disconnect(C2).
 
+t_monitor_current_retained_count(_) ->
+    process_flag(trap_exit, true),
+    ClientId = <<"live_conn_tests">>,
+    {ok, C} = emqtt:start_link([{clean_start, false}, {clientid, ClientId}]),
+    {ok, _} = emqtt:connect(C),
+    _ = emqtt:publish(C, <<"t1">>, <<"qos1-retain">>, [{qos, 1}, {retain, true}]),
+
+    ok = waiting_emqx_stats_and_monitor_update('retained.count'),
+    {ok, Res} = request(["monitor_current"]),
+    {ok, ResNode} = request(["monitor_current", "nodes", node()]),
+
+    ?assertEqual(1, maps:get(<<"retained_msg_count">>, Res)),
+    ?assertEqual(1, maps:get(<<"retained_msg_count">>, ResNode)),
+    ok = emqtt:disconnect(C),
+    ok.
+
+t_monitor_current_shared_subscription(_) ->
+    process_flag(trap_exit, true),
+    ShareT = <<"$share/group1/t/1">>,
+    AssertFun = fun(Num) ->
+        {ok, Res} = request(["monitor_current"]),
+        {ok, ResNode} = request(["monitor_current", "nodes", node()]),
+        ?assertEqual(Num, maps:get(<<"shared_subscriptions">>, Res)),
+        ?assertEqual(Num, maps:get(<<"shared_subscriptions">>, ResNode)),
+        ok
+    end,
+
+    ok = AssertFun(0),
+
+    ClientId1 = <<"live_conn_tests1">>,
+    ClientId2 = <<"live_conn_tests2">>,
+    {ok, C1} = emqtt:start_link([{clean_start, false}, {clientid, ClientId1}]),
+    {ok, _} = emqtt:connect(C1),
+    _ = emqtt:subscribe(C1, {ShareT, 1}),
+
+    ok = AssertFun(1),
+
+    {ok, C2} = emqtt:start_link([{clean_start, true}, {clientid, ClientId2}]),
+    {ok, _} = emqtt:connect(C2),
+    _ = emqtt:subscribe(C2, {ShareT, 1}),
+    ok = AssertFun(2),
+
+    _ = emqtt:unsubscribe(C2, ShareT),
+    ok = AssertFun(1),
+    _ = emqtt:subscribe(C2, {ShareT, 1}),
+    ok = AssertFun(2),
+
+    ok = emqtt:disconnect(C1),
+    %% C1: clean_start = false, proto_ver = 3.1.1
+    %% means disconnected but the session pid with a share-subscription is still alive
+    ok = AssertFun(2),
+
+    _ = emqx_cm:kick_session(ClientId1),
+    ok = AssertFun(1),
+
+    ok = emqtt:disconnect(C2),
+    ok = AssertFun(0),
+    ok.
+
 t_monitor_reset(_) ->
     restart_monitor(),
     {ok, Rate} = request(["monitor_current"]),