%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(ref_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2]).
-export([wrap_1/1]).
-export([loop_ref/1]).
-include_lib("test_server/include/test_server.hrl").
init_per_testcase(_, Config) ->
?line Dog=test_server:timetrap(test_server:minutes(2)),
[{watchdog, Dog}|Config].
end_per_testcase(_, Config) ->
Dog=?config(watchdog, Config),
test_server:timetrap_cancel(Dog),
ok.
suite() -> [{suite_callbacks,[ts_install_scb]}].
all() ->
[wrap_1].
groups() ->
[].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
wrap_1(doc) -> "Check that refs don't wrap around easily.";
wrap_1(Config) when is_list(Config) ->
?line spawn_link(?MODULE, loop_ref, [self()]),
?line receive
done ->
test_server:fail(wrapfast)
after 30000 ->
ok
end,
ok.
loop_ref(Parent) ->
Ref0 = make_ref(),
loop_ref(Ref0, first, 0),
Parent ! done.
loop_ref(R, R, _) -> ok;
loop_ref(R0, _, N) ->
loop_ref(R0, make_ref(), N+1).
