fix(emqx_slow_subs): fix test case error

apps/emqx/src/emqx_session.erl

@@ -129,9 +129,8 @@
           %% Awaiting PUBREL Timeout (Unit: millisecond)
           await_rel_timeout :: timeout(),
           %% Created at
-          created_at :: pos_integer(),
+          created_at :: pos_integer()
           %% Message deliver latency stats
-          latency_stats :: emqx_message_latency_stats:stats()
          }).
 
 
@@ -615,7 +614,7 @@ await(PacketId, Msg, Session = #session{inflight = Inflight}) ->
 
 -spec(retry(emqx_types:clientinfo(), session()) ->
     {ok, session()} | {ok, replies(), timeout(), session()}).
-retry(ClientInfo, Session = #session{inflight = Inflight, retry_interval = RetryInterval}) ->
+retry(ClientInfo, Session = #session{inflight = Inflight}) ->
     case emqx_inflight:is_empty(Inflight) of
         true  -> {ok, Session};
         false ->
@@ -637,12 +636,8 @@ retry_delivery([{PacketId, #inflight_data{timestamp = Ts} = Data} | More],
             {ok, lists:reverse(Acc), Interval - max(0, Age), Session}
     end.
 
-do_retry_delivery(PacketId, Data, Now, Acc, Inflight, _) ->
-        Update = Data#inflight_data{timestamp = Now},
-    Inflight1 = emqx_inflight:update(PacketId, Update, Inflight),
-    {[{pubrel, PacketId} | Acc], Inflight1};
-
-do_retry_delivery(PacketId, #inflight_data{phase = wait_ack, message = Msg} = Data, Now, Acc, Inflight, ClientInfo) ->
+do_retry_delivery(PacketId, #inflight_data{phase = wait_ack, message = Msg} = Data,
+                  Now, Acc, Inflight, ClientInfo) ->
     case emqx_message:is_expired(Msg) of
         true ->
             ok = emqx_hooks:run('delivery.dropped', [ClientInfo, Msg, expired]),
@@ -653,7 +648,12 @@ do_retry_delivery(PacketId, #inflight_data{phase = wait_ack, message = Msg} = Da
             Update = Data#inflight_data{message = Msg1, timestamp = Now},
             Inflight1 = emqx_inflight:update(PacketId, Update, Inflight),
             {[{PacketId, Msg1} | Acc], Inflight1}
-    end.
+    end;
+
+do_retry_delivery(PacketId, Data, Now, Acc, Inflight, _) ->
+    Update = Data#inflight_data{timestamp = Now},
+    Inflight1 = emqx_inflight:update(PacketId, Update, Inflight),
+    {[{pubrel, PacketId} | Acc], Inflight1}.
 
 %%--------------------------------------------------------------------
 %% Expire Awaiting Rel
@@ -770,7 +770,7 @@ mark_begin_deliver(Msg) ->
 
 -compile({inline, [sort_fun/2, batch_n/1, with_ts/1, age/2]}).
 
-sort_fun(A, B) ->
+sort_fun({_, A}, {_, B}) ->
     A#inflight_data.timestamp =< B#inflight_data.timestamp.
 
 batch_n(Inflight) ->

apps/emqx/test/emqx_session_SUITE.erl

@@ -25,7 +25,12 @@
 all() -> emqx_common_test_helpers:all(?MODULE).
 
 -define(NOW, erlang:system_time(millisecond)).
--record(pubrel_await, {timestamp :: non_neg_integer()}).
+
+-type inflight_data_phase() :: wait_ack | wait_comp.
+
+-record(inflight_data, { phase :: inflight_data_phase()
+                       , message :: emqx_types:message()
+                       , timestamp :: non_neg_integer()}).
 
 %%--------------------------------------------------------------------
 %% CT callbacks
@@ -167,14 +172,14 @@ t_is_awaiting_full_true(_) ->
 
 t_puback(_) ->
     Msg = emqx_message:make(test, ?QOS_1, <<"t">>, <<>>),
-    Inflight = emqx_inflight:insert(1, {Msg, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(1, with_ts(wait_ack, Msg), emqx_inflight:new()),
     Session = session(#{inflight => Inflight, mqueue => mqueue()}),
     {ok, Msg, Session1} = emqx_session:puback(clientinfo(), 1, Session),
     ?assertEqual(0, emqx_session:info(inflight_cnt, Session1)).
 
 t_puback_with_dequeue(_) ->
     Msg1 = emqx_message:make(clientid, ?QOS_1, <<"t1">>, <<"payload1">>),
-    Inflight = emqx_inflight:insert(1, {Msg1, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(1, with_ts(wait_ack, Msg1), emqx_inflight:new()),
     Msg2 = emqx_message:make(clientid, ?QOS_1, <<"t2">>, <<"payload2">>),
     {_, Q} = emqx_mqueue:in(Msg2, mqueue(#{max_len => 10})),
     Session = session(#{inflight => Inflight, mqueue => Q}),
@@ -184,7 +189,7 @@ t_puback_with_dequeue(_) ->
     ?assertEqual(<<"t2">>, emqx_message:topic(Msg3)).
 
 t_puback_error_packet_id_in_use(_) ->
-    Inflight = emqx_inflight:insert(1, {#pubrel_await{timestamp = ?NOW}, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(1, with_ts(wait_comp, undefined), emqx_inflight:new()),
     {error, ?RC_PACKET_IDENTIFIER_IN_USE} =
         emqx_session:puback(clientinfo(), 1, session(#{inflight => Inflight})).
 
@@ -193,13 +198,13 @@ t_puback_error_packet_id_not_found(_) ->
 
 t_pubrec(_) ->
     Msg = emqx_message:make(test, ?QOS_2, <<"t">>, <<>>),
-    Inflight = emqx_inflight:insert(2, {Msg, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(2, with_ts(wait_ack, Msg), emqx_inflight:new()),
     Session = session(#{inflight => Inflight}),
     {ok, Msg, Session1} = emqx_session:pubrec(clientinfo(), 2, Session),
-    ?assertMatch([{{pubrel_await, _}, _}], emqx_inflight:values(emqx_session:info(inflight, Session1))).
+    ?assertMatch([#inflight_data{phase = wait_comp}], emqx_inflight:values(emqx_session:info(inflight, Session1))).
 
 t_pubrec_packet_id_in_use_error(_) ->
-    Inflight = emqx_inflight:insert(1, {#pubrel_await{timestamp = ?NOW}, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(1, with_ts(wait_comp, undefined), emqx_inflight:new()),
     {error, ?RC_PACKET_IDENTIFIER_IN_USE} =
         emqx_session:pubrec(clientinfo(), 1, session(#{inflight => Inflight})).
 
@@ -215,7 +220,7 @@ t_pubrel_error_packetid_not_found(_) ->
     {error, ?RC_PACKET_IDENTIFIER_NOT_FOUND} = emqx_session:pubrel(clientinfo(), 1, session()).
 
 t_pubcomp(_) ->
-    Inflight = emqx_inflight:insert(1, {#pubrel_await{timestamp = ?NOW}, ts(millisecond)}, emqx_inflight:new()),
+    Inflight = emqx_inflight:insert(1, with_ts(wait_comp, undefined), emqx_inflight:new()),
     Session = session(#{inflight => Inflight}),
     {ok, Session1} = emqx_session:pubcomp(clientinfo(), 1, Session),
     ?assertEqual(0, emqx_session:info(inflight_cnt, Session1)).
@@ -272,9 +277,11 @@ t_deliver_qos1(_) ->
     ?assertEqual(2, emqx_session:info(inflight_cnt, Session1)),
     ?assertEqual(<<"t1">>, emqx_message:topic(Msg1)),
     ?assertEqual(<<"t2">>, emqx_message:topic(Msg2)),
-    {ok, Msg1, Session2} = emqx_session:puback(clientinfo(), 1, Session1),
+    {ok, Msg1T, Session2} = emqx_session:puback(clientinfo(), 1, Session1),
+    ?assertEqual(Msg1, remove_deliver_flag(Msg1T)),
     ?assertEqual(1, emqx_session:info(inflight_cnt, Session2)),
-    {ok, Msg2, Session3} = emqx_session:puback(clientinfo(), 2, Session2),
+    {ok, Msg2T, Session3} = emqx_session:puback(clientinfo(), 2, Session2),
+    ?assertEqual(Msg2, remove_deliver_flag(Msg2T)),
     ?assertEqual(0, emqx_session:info(inflight_cnt, Session3)).
 
 t_deliver_qos2(_) ->
@@ -319,8 +326,9 @@ t_retry(_) ->
     {ok, Pubs, Session1} = emqx_session:deliver(clientinfo(), Delivers, Session),
     ElapseMs = 200, %% 0.2s
     ok = timer:sleep(ElapseMs),
-    Msgs1 = [{I, emqx_message:set_flag(dup, Msg)} || {I, Msg} <- Pubs],
-    {ok, Msgs1, 100, Session2} = emqx_session:retry(clientinfo(), Session1),
+    Msgs1 = [{I, with_ts(wait_ack, emqx_message:set_flag(dup, Msg))} || {I, Msg} <- Pubs],
+    {ok, Msgs1T, 100, Session2} = emqx_session:retry(clientinfo(), Session1),
+    ?assertEqual(inflight_data_to_msg(Msgs1), remove_deliver_flag(Msgs1T)),
     ?assertEqual(2, emqx_session:info(inflight_cnt, Session2)).
 
 %%--------------------------------------------------------------------
@@ -344,7 +352,7 @@ t_replay(_) ->
     Session2 = emqx_session:enqueue(clientinfo(), Msg, Session1),
     Pubs1 = [{I, emqx_message:set_flag(dup, M)} || {I, M} <- Pubs],
     {ok, ReplayPubs, Session3} = emqx_session:replay(clientinfo(), Session2),
-    ?assertEqual(Pubs1 ++ [{3, Msg}], ReplayPubs),
+    ?assertEqual(Pubs1 ++ [{3, Msg}], remove_deliver_flag(ReplayPubs)),
     ?assertEqual(3, emqx_session:info(inflight_cnt, Session3)).
 
 t_expire_awaiting_rel(_) ->
@@ -404,3 +412,32 @@ ts(second) ->
     erlang:system_time(second);
 ts(millisecond) ->
     erlang:system_time(millisecond).
+
+with_ts(Phase, Msg) ->
+    with_ts(Phase, Msg, erlang:system_time(millisecond)).
+
+with_ts(Phase, Msg, Ts) ->
+    #inflight_data{phase = Phase,
+                   message = Msg,
+                   timestamp = Ts}.
+
+remove_deliver_flag({Id, Data}) ->
+    {Id, remove_deliver_flag(Data)};
+
+remove_deliver_flag(#inflight_data{message = Msg} = Data) ->
+    Data#inflight_data{message = remove_deliver_flag(Msg)};
+
+remove_deliver_flag(List) when is_list(List) ->
+    lists:map(fun remove_deliver_flag/1, List);
+
+remove_deliver_flag(Msg) ->
+    emqx_message:remove_header(deliver_begin_at, Msg).
+
+inflight_data_to_msg({Id, Data}) ->
+    {Id, inflight_data_to_msg(Data)};
+
+inflight_data_to_msg(#inflight_data{message = Msg}) ->
+    Msg;
+
+inflight_data_to_msg(List) when is_list(List) ->
+    lists:map(fun inflight_data_to_msg/1, List).