%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
-module(fun_SUITE).
-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
init_per_suite/1,end_per_suite/1,
good_call/1,bad_apply/1,bad_fun_call/1,badarity/1,
ext_badarity/1,otp_6061/1,external/1,eep37/1]).
%% Internal exports.
-export([nothing/0,call_me/1]).
-include_lib("common_test/include/ct.hrl").
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,1}}].
all() ->
cases().
groups() ->
[].
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
cases() ->
[good_call, bad_apply, bad_fun_call, badarity,
ext_badarity, otp_6061, external, eep37].
init_per_testcase(_Case, Config) ->
test_lib:interpret(?MODULE),
Config.
end_per_testcase(_Case, _Config) ->
ok.
init_per_suite(Config) when is_list(Config) ->
test_lib:interpret(?MODULE),
true = lists:member(?MODULE, int:interpreted()),
Config.
end_per_suite(Config) when is_list(Config) ->
ok.
good_call(Config) when is_list(Config) ->
F = fun() -> ok end,
ok = F(),
FF = fun ?MODULE:nothing/0,
ok = FF(),
ok.
%% Test that the correct EXIT code is returned for all types of bad funs.
bad_apply(Config) when is_list(Config) ->
bad_apply_fc(42, [0]),
bad_apply_fc(xx, [1]),
bad_apply_fc({}, [2]),
bad_apply_fc({1}, [3]),
bad_apply_fc({1,2,3}, [4]),
bad_apply_fc({1,2,3}, [5]),
bad_apply_fc({1,2,3,4}, [6]),
bad_apply_fc({1,2,3,4,5,6}, [7]),
bad_apply_fc({1,2,3,4,5}, [8]),
bad_apply_badarg({1,2}, [9]),
ok.
bad_apply_fc(Fun, Args) ->
Res = (catch apply(Fun, Args)),
erlang:garbage_collect(),
erlang:yield(),
case Res of
{'EXIT',{{badfun,Fun},_Where}} ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res]);
Other ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res]),
ct:fail({bad_result,Other})
end.
bad_apply_badarg(Fun, Args) ->
Res = (catch apply(Fun, Args)),
erlang:garbage_collect(),
erlang:yield(),
case Res of
{'EXIT',{{badfun,Fun},_Where}} ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res]);
Other ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res]),
ct:fail({bad_result, Other})
end.
%% Try directly calling bad funs.
bad_fun_call(Config) when is_list(Config) ->
bad_call_fc(42),
bad_call_fc(xx),
bad_call_fc({}),
bad_call_fc({1}),
bad_call_fc({1,2,3}),
bad_call_fc({1,2,3}),
bad_call_fc({1,2,3,4}),
bad_call_fc({1,2,3,4,5,6}),
bad_call_fc({1,2,3,4,5}),
bad_call_fc({1,2}),
ok.
bad_call_fc(Fun) ->
Args = [some,stupid,args],
Res = (catch Fun(Args)),
case Res of
{'EXIT',{{badfun,Fun},_Where}} ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]);
Other ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]),
ct:fail({bad_result,Other})
end.
%% Call and apply valid external funs with wrong number of arguments.
badarity(Config) when is_list(Config) ->
Fun = fun() -> ok end,
Stupid = {stupid,arguments},
Args = [some,{stupid,arguments},here],
%% Simple call.
Res = (catch Fun(some, Stupid, here)),
erlang:garbage_collect(),
erlang:yield(),
case Res of
{'EXIT',{{badarity,{Fun,Args}},[_|_]}} ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]);
_ ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]),
ct:fail({bad_result,Res})
end,
%% Apply.
Res2 = (catch apply(Fun, Args)),
erlang:garbage_collect(),
erlang:yield(),
case Res2 of
{'EXIT',{{badarity,{Fun,Args}},[_|_]}} ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res2]);
_ ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res2]),
ct:fail({bad_result,Res2})
end,
ok.
%% Call and apply valid external funs with wrong number of arguments.
ext_badarity(Config) when is_list(Config) ->
Fun = fun ?MODULE:nothing/0,
Stupid = {stupid,arguments},
Args = [some,{stupid,arguments},here],
%% Simple call.
Res = (catch Fun(some, Stupid, here)),
erlang:garbage_collect(),
erlang:yield(),
case Res of
{'EXIT',{{badarity,{Fun,Args}},_}} ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]);
_ ->
ok = io:format("~p(~p) -> ~p\n", [Fun,Args,Res]),
ct:fail({bad_result,Res})
end,
%% Apply.
Res2 = (catch apply(Fun, Args)),
erlang:garbage_collect(),
erlang:yield(),
case Res2 of
{'EXIT',{{badarity,{Fun,Args}},_}} ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res2]);
_ ->
ok = io:format("apply(~p, ~p) -> ~p\n", [Fun,Args,Res2]),
ct:fail({bad_result,Res2})
end,
ok.
nothing() ->
ok.
%% Test handling of fun expression referring to uninterpreted code.
otp_6061(Config) when is_list(Config) ->
OrigFlag = process_flag(trap_exit, true),
Self = self(),
Pid = spawn_link(fun() -> test_otp_6061(Self) end),
receive
working ->
ok;
not_working ->
ct:fail(not_working);
{'EXIT', Pid, Reason} ->
ct:fail({crash, Reason})
after
5000 ->
ct:fail(timeout)
end,
process_flag(trap_exit, OrigFlag),
ok.
test_otp_6061(Starter) ->
Passes = [2],
PassesF = [fun() -> Starter ! not_working end,
fun() -> Starter ! working end,
fun() -> Starter ! not_working end],
lists:foreach(fun(P)->(lists:nth(P,PassesF))() end,Passes).
-define(APPLY(M, F, A), (fun(Fun) -> {ok,{a,b}} = Fun({a,b}) end)(fun M:F/A)).
-define(APPLY2(M, F, A),
(fun(Map) ->
Id = fun(I) -> I end,
List = [x,y],
List = Map(Id, List),
{type,external} = erlang:fun_info(Map, type)
end)(fun M:F/A)).
external(Config) when is_list(Config) ->
Mod = id(?MODULE),
Func = id(call_me),
Arity = id(1),
?APPLY(?MODULE, call_me, 1),
?APPLY(?MODULE, call_me, Arity),
?APPLY(?MODULE, Func, 1),
?APPLY(?MODULE, Func, Arity),
?APPLY(Mod, call_me, 1),
?APPLY(Mod, call_me, Arity),
?APPLY(Mod, Func, 1),
?APPLY(Mod, Func, Arity),
ListsMod = id(lists),
ListsMap = id(map),
ListsArity = id(2),
?APPLY2(lists, map, 2),
?APPLY2(lists, map, ListsArity),
?APPLY2(lists, ListsMap, 2),
?APPLY2(lists, ListsMap, ListsArity),
?APPLY2(ListsMod, map, 2),
?APPLY2(ListsMod, map, ListsArity),
?APPLY2(ListsMod, ListsMap, 2),
?APPLY2(ListsMod, ListsMap, ListsArity),
ok.
call_me(I) ->
{ok,I}.
eep37(Config) when is_list(Config) ->
F = fun Fact(N) when N > 0 -> N * Fact(N - 1); Fact(0) -> 1 end,
Add = fun _(N) -> N + 1 end,
UnusedName = fun BlackAdder(N) -> N + 42 end,
720 = F(6),
10 = Add(9),
50 = UnusedName(8),
[1,1,2,6,24,120] = lists:map(F, lists:seq(0, 5)),
{'EXIT',{{badarity,_},_}} = (catch lists:map(fun G() -> G() end, [1])),
{'EXIT',{{badarity,_},_}} = (catch F()),
ok.
id(I) ->
I.
