%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2004-2011. 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. %%% %%%

This module is a proxy for calling and handling common test hooks.

-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]). %% 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 :: proplists: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 = try proplists:get_value(ct_hooks, Mod:suite(),[]) of List when is_list(List) -> [{ct_hooks,List}]; CTHook when is_atom(CTHook) -> [{ct_hooks,[CTHook]}] catch error:undef -> [{ct_hooks,[]}] 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 :: proplists: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, Suite, Case]). on_tc_fail(_How, {Suite, Case, Reason}) -> call(fun call_cleanup/3, Reason, [on_tc_fail, Suite, 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, _Suite | 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, [on_tc_skip,_Suite,{end_per_group,Name}], Hooks) -> terminate_if_scope_ends(HookId, [post_end_per_group, Name], Hooks); terminate_if_scope_ends(HookId, [on_tc_skip,Suite,end_per_suite], Hooks) -> terminate_if_scope_ends(HookId, [post_end_per_suite, Suite], Hooks); 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().