Add a test to check channel interceptor hang.

The test can hang without channel interceptor fix
and will fail with timetrap timeout

[#153846585]

Author: hairyhum

test/channel_interceptor_SUITE.erl

@@ -29,7 +29,8 @@ all() ->
 groups() ->
     [
       {non_parallel_tests, [], [
-          register_interceptor
+          register_interceptor,
+          register_failing_interceptors
         ]}
     ].
 
@@ -71,9 +72,9 @@ end_per_testcase(Testcase, Config) ->
 
 register_interceptor(Config) ->
     passed = rabbit_ct_broker_helpers:rpc(Config, 0,
-      ?MODULE, register_interceptor1, [Config]).
+      ?MODULE, register_interceptor1, [Config, dummy_interceptor]).
 
-register_interceptor1(Config) ->
+register_interceptor1(Config, Interceptor) ->
     PredefinedChannels = rabbit_channel:list(),
 
     Ch1 = rabbit_ct_client_helpers:open_channel(Config, 0),
@@ -89,8 +90,8 @@ register_interceptor1(Config) ->
 
     ok = rabbit_registry:register(channel_interceptor,
                                   <<"dummy interceptor">>,
-                                  dummy_interceptor),
-    [{interceptors, [{dummy_interceptor, undefined}]}] =
+                                  Interceptor),
+    [{interceptors, [{Interceptor, undefined}]}] =
       rabbit_channel:info(ChannelProc, [interceptors]),
 
     check_send_receive(Ch1, QName, <<"bar">>, <<"">>),
@@ -102,6 +103,9 @@ register_interceptor1(Config) ->
     check_send_receive(Ch1, QName, <<"bar">>, <<"bar">>),
     passed.
 
+register_failing_interceptors(Config) ->
+    passed = rabbit_ct_broker_helpers:rpc(Config, 0,
+      ?MODULE, register_interceptor1, [Config, failing_dummy_interceptor]).
 
 check_send_receive(Ch1, QName, Send, Receive) ->
     amqp_channel:call(Ch1,

test/failing_dummy_interceptor.erl

@@ -0,0 +1,27 @@
+-module(failing_dummy_interceptor).
+
+-behaviour(rabbit_channel_interceptor).
+
+-include_lib("rabbit_common/include/rabbit.hrl").
+-include_lib("rabbit_common/include/rabbit_framing.hrl").
+
+
+-compile(export_all).
+
+init(_Ch) ->
+    timer:sleep(15500),
+    undefined.
+
+description() ->
+    [{description,
+      <<"Empties payload on publish">>}].
+
+intercept(#'basic.publish'{} = Method, Content, _IState) ->
+    Content2 = Content#content{payload_fragments_rev = []},
+    {Method, Content2};
+
+intercept(Method, Content, _VHost) ->
+    {Method, Content}.
+
+applies_to() ->
+    ['basic.publish'].