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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2004-2010. 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%
+%%
+
+%%% @doc Common Test Framework test execution control module.
+%%%
+%%% <p>This module is a proxy for calling and handling common test hooks.</p>
+
+-module(ct_hooks).
+
+%% API Exports
+-export([init/1]).
+-export([init_tc/3]).
+-export([end_tc/5]).
+-export([terminate/1]).
+-export([on_tc_skip/2]).
+-export([on_tc_fail/2]).
+
+-type proplist() :: [{atom(),term()}].
+
+%% If you change this, remember to update ct_util:look -> stop clause as well.
+-define(config_name, ct_hooks).
+
+%% -------------------------------------------------------------------------
+%% API Functions
+%% -------------------------------------------------------------------------
+
+%% @doc Called before any suites are started
+-spec init(State :: term()) -> ok |
+ {error, Reason :: term()}.
+init(Opts) ->
+ call([{Hook, call_id, undefined} || Hook <- get_new_hooks(Opts)],
+ ok, init, []).
+
+
+%% @doc Called after all suites are done.
+-spec terminate(Hooks :: term()) ->
+ ok.
+terminate(Hooks) ->
+ call([{HookId, fun call_terminate/3} || {HookId,_,_} <- Hooks],
+ ct_hooks_terminate_dummy, terminate, Hooks),
+ ok.
+
+%% @doc Called as each test case is started. This includes all configuration
+%% tests.
+-spec init_tc(Mod :: atom(), Func :: atom(), Args :: list()) ->
+ NewConfig :: proplist() |
+ {skip, Reason :: term()} |
+ {auto_skip, Reason :: term()} |
+ {fail, Reason :: term()}.
+init_tc(ct_framework, _Func, Args) ->
+ Args;
+init_tc(Mod, init_per_suite, Config) ->
+ Info = case catch proplists:get_value(ct_hooks, Mod:suite()) of
+ List when is_list(List) ->
+ [{ct_hooks,List}];
+ _Else ->
+ []
+ end,
+ call(fun call_generic/3, Config ++ Info, [pre_init_per_suite, Mod]);
+init_tc(Mod, end_per_suite, Config) ->
+ call(fun call_generic/3, Config, [pre_end_per_suite, Mod]);
+init_tc(Mod, {init_per_group, GroupName, Opts}, Config) ->
+ maybe_start_locker(Mod, GroupName, Opts),
+ call(fun call_generic/3, Config, [pre_init_per_group, GroupName]);
+init_tc(_Mod, {end_per_group, GroupName, _}, Config) ->
+ call(fun call_generic/3, Config, [pre_end_per_group, GroupName]);
+init_tc(_Mod, TC, Config) ->
+ call(fun call_generic/3, Config, [pre_init_per_testcase, TC]).
+
+%% @doc Called as each test case is completed. This includes all configuration
+%% tests.
+-spec end_tc(Mod :: atom(),
+ Func :: atom(),
+ Args :: list(),
+ Result :: term(),
+ Resturn :: term()) ->
+ NewConfig :: proplist() |
+ {skip, Reason :: term()} |
+ {auto_skip, Reason :: term()} |
+ {fail, Reason :: term()} |
+ ok | '$ct_no_change'.
+end_tc(ct_framework, _Func, _Args, Result, _Return) ->
+ Result;
+
+end_tc(Mod, init_per_suite, Config, _Result, Return) ->
+ call(fun call_generic/3, Return, [post_init_per_suite, Mod, Config],
+ '$ct_no_change');
+
+end_tc(Mod, end_per_suite, Config, Result, _Return) ->
+ call(fun call_generic/3, Result, [post_end_per_suite, Mod, Config],
+ '$ct_no_change');
+
+end_tc(_Mod, {init_per_group, GroupName, _}, Config, _Result, Return) ->
+ call(fun call_generic/3, Return, [post_init_per_group, GroupName, Config],
+ '$ct_no_change');
+
+end_tc(Mod, {end_per_group, GroupName, Opts}, Config, Result, _Return) ->
+ Res = call(fun call_generic/3, Result,
+ [post_end_per_group, GroupName, Config], '$ct_no_change'),
+ maybe_stop_locker(Mod, GroupName,Opts),
+ Res;
+
+end_tc(_Mod, TC, Config, Result, _Return) ->
+ call(fun call_generic/3, Result, [post_end_per_testcase, TC, Config],
+ '$ct_no_change').
+
+on_tc_skip(How, {_Suite, Case, Reason}) ->
+ call(fun call_cleanup/3, {How, Reason}, [on_tc_skip, Case]).
+
+on_tc_fail(_How, {_Suite, Case, Reason}) ->
+ call(fun call_cleanup/3, Reason, [on_tc_fail, Case]).
+
+%% -------------------------------------------------------------------------
+%% Internal Functions
+%% -------------------------------------------------------------------------
+call_id(Mod, Config, Meta) when is_atom(Mod) ->
+ call_id({Mod, []}, Config, Meta);
+call_id({Mod, Opts}, Config, Scope) ->
+ Id = catch_apply(Mod,id,[Opts], make_ref()),
+ {Config, {Id, scope(Scope), {Mod, {Id,Opts}}}}.
+
+call_init({Mod,{Id,Opts}},Config,_Meta) ->
+ NewState = Mod:init(Id, Opts),
+ {Config, {Mod, NewState}}.
+
+call_terminate({Mod, State}, _, _) ->
+ catch_apply(Mod,terminate,[State], ok),
+ {[],{Mod,State}}.
+
+call_cleanup({Mod, State}, Reason, [Function | Args]) ->
+ NewState = catch_apply(Mod,Function, Args ++ [Reason, State],
+ State),
+ {Reason, {Mod, NewState}}.
+
+call_generic({Mod, State}, Value, [Function | Args]) ->
+ {NewValue, NewState} = catch_apply(Mod, Function, Args ++ [Value, State],
+ {Value,State}),
+ {NewValue, {Mod, NewState}}.
+
+%% Generic call function
+call(Fun, Config, Meta) ->
+ maybe_lock(),
+ Hooks = get_hooks(),
+ Res = call([{HookId,Fun} || {HookId,_, _} <- Hooks] ++
+ get_new_hooks(Config, Fun),
+ remove(?config_name,Config), Meta, Hooks),
+ maybe_unlock(),
+ Res.
+
+call(Fun, Config, Meta, NoChangeRet) when is_function(Fun) ->
+ case call(Fun,Config,Meta) of
+ Config -> NoChangeRet;
+ NewReturn -> NewReturn
+ end;
+
+call([{Hook, call_id, NextFun} | Rest], Config, Meta, Hooks) ->
+ try
+ {Config, {NewId, _, _} = NewHook} = call_id(Hook, Config, Meta),
+ {NewHooks, NewRest} =
+ case lists:keyfind(NewId, 1, Hooks) of
+ false when NextFun =:= undefined ->
+ {Hooks ++ [NewHook],
+ [{NewId, fun call_init/3} | Rest]};
+ ExistingHook when is_tuple(ExistingHook) ->
+ {Hooks, Rest};
+ _ ->
+ {Hooks ++ [NewHook],
+ [{NewId, fun call_init/3},{NewId,NextFun} | Rest]}
+ end,
+ call(NewRest, Config, Meta, NewHooks)
+ catch Error:Reason ->
+ Trace = erlang:get_stacktrace(),
+ ct_logs:log("Suite Hook","Failed to start a CTH: ~p:~p",
+ [Error,{Reason,Trace}]),
+ call([], {fail,"Failed to start CTH"
+ ", see the CT Log for details"}, Meta, Hooks)
+ end;
+call([{HookId, Fun} | Rest], Config, Meta, Hooks) ->
+ try
+ {_,Scope,ModState} = lists:keyfind(HookId, 1, Hooks),
+ {NewConf, NewHookInfo} = Fun(ModState, Config, Meta),
+ NewCalls = get_new_hooks(NewConf, Fun),
+ NewHooks = lists:keyreplace(HookId, 1, Hooks, {HookId, Scope, NewHookInfo}),
+ call(NewCalls ++ Rest, remove(?config_name, NewConf), Meta,
+ terminate_if_scope_ends(HookId, Meta, NewHooks))
+ catch throw:{error_in_cth_call,Reason} ->
+ call(Rest, {fail, Reason}, Meta,
+ terminate_if_scope_ends(HookId, Meta, Hooks))
+ end;
+call([], Config, _Meta, Hooks) ->
+ save_suite_data_async(Hooks),
+ Config.
+
+remove(Key,List) when is_list(List) ->
+ [Conf || Conf <- List, is_tuple(Conf) =:= false
+ orelse element(1, Conf) =/= Key];
+remove(_, Else) ->
+ Else.
+
+%% Translate scopes, i.e. init_per_group,group1 -> end_per_group,group1 etc
+scope([pre_init_per_testcase, TC|_]) ->
+ [post_end_per_testcase, TC];
+scope([pre_init_per_group, GroupName|_]) ->
+ [post_end_per_group, GroupName];
+scope([post_init_per_group, GroupName|_]) ->
+ [post_end_per_group, GroupName];
+scope([pre_init_per_suite, SuiteName|_]) ->
+ [post_end_per_suite, SuiteName];
+scope([post_init_per_suite, SuiteName|_]) ->
+ [post_end_per_suite, SuiteName];
+scope(init) ->
+ none.
+
+terminate_if_scope_ends(HookId, [Function,Tag|T], Hooks) when T =/= [] ->
+ terminate_if_scope_ends(HookId,[Function,Tag],Hooks);
+terminate_if_scope_ends(HookId, Function, Hooks) ->
+ case lists:keyfind(HookId, 1, Hooks) of
+ {HookId, Function, _ModState} = Hook ->
+ terminate([Hook]),
+ lists:keydelete(HookId, 1, Hooks);
+ _ ->
+ Hooks
+ end.
+
+%% Fetch hook functions
+get_new_hooks(Config, Fun) ->
+ lists:foldl(fun(NewHook, Acc) ->
+ [{NewHook, call_id, Fun} | Acc]
+ end, [], get_new_hooks(Config)).
+
+get_new_hooks(Config) when is_list(Config) ->
+ lists:flatmap(fun({?config_name, HookConfigs}) ->
+ HookConfigs;
+ (_) ->
+ []
+ end, Config);
+get_new_hooks(_Config) ->
+ [].
+
+save_suite_data_async(Hooks) ->
+ ct_util:save_suite_data_async(?config_name, Hooks).
+
+get_hooks() ->
+ ct_util:read_suite_data(?config_name).
+
+catch_apply(M,F,A, Default) ->
+ try
+ apply(M,F,A)
+ catch error:Reason ->
+ case erlang:get_stacktrace() of
+ %% Return the default if it was the CTH module which did not have the function.
+ [{M,F,A}|_] when Reason == undef ->
+ Default;
+ Trace ->
+ ct_logs:log("Suite Hook","Call to CTH failed: ~p:~p",
+ [error,{Reason,Trace}]),
+ throw({error_in_cth_call,
+ lists:flatten(
+ io_lib:format("~p:~p/~p CTH call failed",
+ [M,F,length(A)]))})
+ end
+ end.
+
+
+%% We need to lock around the state for parallel groups only. This is because
+%% we will get several processes reading and writing the state for a single
+%% cth at the same time.
+maybe_start_locker(Mod,GroupName,Opts) ->
+ case lists:member(parallel,Opts) of
+ true ->
+ {ok, _Pid} = ct_hooks_lock:start({Mod,GroupName});
+ false ->
+ ok
+ end.
+
+maybe_stop_locker(Mod,GroupName,Opts) ->
+ case lists:member(parallel,Opts) of
+ true ->
+ stopped = ct_hooks_lock:stop({Mod,GroupName});
+ false ->
+ ok
+ end.
+
+
+maybe_lock() ->
+ locked = ct_hooks_lock:request().
+
+maybe_unlock() ->
+ unlocked = ct_hooks_lock:release().
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