test: fix flaky gateway tests

apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl

@@ -239,6 +239,7 @@ t_gateway_exproto_with_ssl(_) ->
 t_authn(_) ->
     GwConf = #{name => <<"stomp">>},
     {201, _} = request(post, "/gateway", GwConf),
+    ct:sleep(500),
     {204, _} = request(get, "/gateway/stomp/authentication"),
 
     AuthConf = #{
@@ -263,6 +264,7 @@ t_authn(_) ->
 t_authn_data_mgmt(_) ->
     GwConf = #{name => <<"stomp">>},
     {201, _} = request(post, "/gateway", GwConf),
+    ct:sleep(500),
     {204, _} = request(get, "/gateway/stomp/authentication"),
 
     AuthConf = #{
@@ -271,6 +273,7 @@ t_authn_data_mgmt(_) ->
         user_id_type => <<"clientid">>
     },
     {201, _} = request(post, "/gateway/stomp/authentication", AuthConf),
+    ct:sleep(500),
     {200, ConfResp} = request(get, "/gateway/stomp/authentication"),
     assert_confs(AuthConf, ConfResp),
 
@@ -374,6 +377,7 @@ t_listeners_authn(_) ->
         ]
     },
     {201, _} = request(post, "/gateway", GwConf),
+    ct:sleep(500),
     {200, ConfResp} = request(get, "/gateway/stomp"),
     assert_confs(GwConf, ConfResp),
 

apps/emqx_gateway/test/emqx_gateway_conf_SUITE.erl

@@ -47,6 +47,7 @@ end_per_suite(_Conf) ->
 
 init_per_testcase(_CaseName, Conf) ->
     _ = emqx_gateway_conf:unload_gateway(stomp),
+    ct:sleep(500),
     Conf.
 
 %%--------------------------------------------------------------------
@@ -282,6 +283,7 @@ t_load_remove_authn(_) ->
 
     {ok, _} = emqx_gateway_conf:load_gateway(<<"stomp">>, StompConf),
     assert_confs(StompConf, emqx:get_raw_config([gateway, stomp])),
+    ct:sleep(500),
 
     {ok, _} = emqx_gateway_conf:add_authn(<<"stomp">>, ?CONF_STOMP_AUTHN_1),
     assert_confs(
@@ -314,6 +316,7 @@ t_load_remove_listeners(_) ->
 
     {ok, _} = emqx_gateway_conf:load_gateway(<<"stomp">>, StompConf),
     assert_confs(StompConf, emqx:get_raw_config([gateway, stomp])),
+    ct:sleep(500),
 
     {ok, _} = emqx_gateway_conf:add_listener(
         <<"stomp">>,
@@ -371,6 +374,7 @@ t_load_remove_listener_authn(_) ->
 
     {ok, _} = emqx_gateway_conf:load_gateway(<<"stomp">>, StompConf),
     assert_confs(StompConf, emqx:get_raw_config([gateway, stomp])),
+    ct:sleep(500),
 
     {ok, _} = emqx_gateway_conf:add_authn(
         <<"stomp">>, {<<"tcp">>, <<"default">>}, ?CONF_STOMP_AUTHN_1