Silence expected warnings for messages from unknown processes

test/sys_SUITE.erl

@@ -31,10 +31,9 @@ groups() ->
 	[{sys, [parallel], ct_helper:all(?MODULE)}].
 
 init_per_suite(Config) ->
-	ct:print("This test suite will produce error reports about "
-		"EXIT signals for unknown processes."),
 	ProtoOpts = #{
-		env => #{dispatch => init_dispatch(Config)}
+		env => #{dispatch => init_dispatch(Config)},
+		logger => ?MODULE
 	},
 	%% Clear listener.
 	{ok, _} = cowboy:start_clear(clear, [{port, 0}], ProtoOpts),
@@ -61,6 +60,16 @@ init_dispatch(_) ->
 		{"/ws", ws_echo, []}
 	]}]).
 
+%% Logger function silencing the expected warnings.
+
+error(Format, Args) ->
+	error_logger:error_msg(Format, Args).
+
+warning("Received EXIT signal " ++ _, [{'EXIT', _, {shutdown, ?MODULE}}|_]) ->
+	ok;
+warning(Format, Args) ->
+	error_logger:warning_msg(Format, Args).
+
 %% proc_lib.
 
 proc_lib_initial_call_clear(Config) ->
@@ -318,7 +327,7 @@ trap_exit_parent_exit_h1(Config) ->
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
 	Parent = get_parent_pid(Pid),
-	Pid ! {'EXIT', Parent, shutdown},
+	Pid ! {'EXIT', Parent, {shutdown, ?MODULE}},
 	{error, closed} = gen_tcp:recv(Socket, 0, 1000),
 	true = is_process_down(Pid),
 	ok.
@@ -333,7 +342,7 @@ trap_exit_parent_exit_h2(Config) ->
 	timer:sleep(100),
 	Pid = get_remote_pid_tls(Socket),
 	Parent = get_parent_pid(Pid),
-	Pid ! {'EXIT', Parent, shutdown},
+	Pid ! {'EXIT', Parent, {shutdown, ?MODULE}},
 	{error, closed} = ssl:recv(Socket, 0, 1000),
 	true = is_process_down(Pid),
 	ok.
@@ -357,7 +366,7 @@ trap_exit_parent_exit_ws(Config) ->
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
 	Parent = get_parent_pid(Pid),
-	Pid ! {'EXIT', Parent, shutdown},
+	Pid ! {'EXIT', Parent, {shutdown, ?MODULE}},
 	{error, closed} = gen_tcp:recv(Socket, 0, 1000),
 	true = is_process_down(Pid),
 	ok.
@@ -373,7 +382,7 @@ trap_exit_parent_exit_loop(Config) ->
 	timer:sleep(100),
 	Parent = get_remote_pid_tcp(Socket),
 	[{_, Pid, _, _}] = supervisor:which_children(Parent),
-	Pid ! {'EXIT', Parent, shutdown},
+	Pid ! {'EXIT', Parent, {shutdown, ?MODULE}},
 	%% We exit normally but didn't send a response.
 	{ok, "HTTP/1.1 204 "} = gen_tcp:recv(Socket, 13, 1000),
 	true = is_process_down(Pid),
@@ -386,7 +395,7 @@ trap_exit_other_exit_h1(Config) ->
 		[{active, false}]),
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
-	Pid ! {'EXIT', self(), shutdown},
+	Pid ! {'EXIT', self(), {shutdown, ?MODULE}},
 	ok = gen_tcp:send(Socket,
 		"GET / HTTP/1.1\r\n"
 		"Host: localhost\r\n"
@@ -407,7 +416,7 @@ trap_exit_other_exit_h2(Config) ->
 	{ok, << 0:24, 4:8, 1:8, 0:32 >>} = ssl:recv(Socket, 9, 1000),
 	timer:sleep(100),
 	Pid = get_remote_pid_tls(Socket),
-	Pid ! {'EXIT', self(), shutdown},
+	Pid ! {'EXIT', self(), {shutdown, ?MODULE}},
 	%% Send a HEADERS frame as a request.
 	{HeadersBlock, _} = cow_hpack:encode([
 		{<<":method">>, <<"GET">>},
@@ -439,7 +448,7 @@ trap_exit_other_exit_ws(Config) ->
 	{ok, {http_response, {1, 1}, 101, _}, _} = erlang:decode_packet(http, Handshake, []),
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
-	Pid ! {'EXIT', self(), shutdown},
+	Pid ! {'EXIT', self(), {shutdown, ?MODULE}},
 	%% The process stays alive.
 	{error, timeout} = gen_tcp:recv(Socket, 0, 1000),
 	true = is_process_alive(Pid),
@@ -456,7 +465,7 @@ trap_exit_other_exit_loop(Config) ->
 	timer:sleep(100),
 	Parent = get_remote_pid_tcp(Socket),
 	[{_, Pid, _, _}] = supervisor:which_children(Parent),
-	Pid ! {'EXIT', self(), shutdown},
+	Pid ! {'EXIT', self(), {shutdown, ?MODULE}},
 	%% The process stays alive.
 	{ok, "HTTP/1.1 299 "} = gen_tcp:recv(Socket, 13, 1000),
 	true = is_process_alive(Pid),
@@ -889,7 +898,7 @@ sys_terminate_h1(Config) ->
 	{ok, Socket} = gen_tcp:connect("localhost", config(clear_port, Config), [{active, false}]),
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
-	ok = sys:terminate(Pid, {shutdown, test}),
+	ok = sys:terminate(Pid, {shutdown, ?MODULE}),
 	{error, closed} = gen_tcp:recv(Socket, 0, 500),
 	ok.
 
@@ -901,7 +910,7 @@ sys_terminate_h2(Config) ->
 	{ok, <<_,_,_,4,_/bits>>} = ssl:recv(Socket, 0, 1000),
 	timer:sleep(100),
 	Pid = get_remote_pid_tls(Socket),
-	ok = sys:terminate(Pid, {shutdown, test}),
+	ok = sys:terminate(Pid, {shutdown, ?MODULE}),
 	{error, closed} = ssl:recv(Socket, 0, 500),
 	ok.
 
@@ -922,7 +931,7 @@ sys_terminate_ws(Config) ->
 	{ok, {http_response, {1, 1}, 101, _}, _} = erlang:decode_packet(http, Handshake, []),
 	timer:sleep(100),
 	Pid = get_remote_pid_tcp(Socket),
-	ok = sys:terminate(Pid, {shutdown, test}),
+	ok = sys:terminate(Pid, {shutdown, ?MODULE}),
 	{error, closed} = gen_tcp:recv(Socket, 0, 500),
 	ok.
 
@@ -937,7 +946,7 @@ sys_terminate_loop(Config) ->
 	SupPid = get_remote_pid_tcp(Socket),
 	[{_, Pid, _, _}] = supervisor:which_children(SupPid),
 	%% We stop the process normally and therefore get a 204.
-	ok = sys:terminate(Pid, {shutdown, test}),
+	ok = sys:terminate(Pid, {shutdown, ?MODULE}),
 	{ok, "HTTP/1.1 204 "} = gen_tcp:recv(Socket, 13, 500),
 	ok.