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Diffstat (limited to 'lib/common_test/src')
| -rw-r--r-- | lib/common_test/src/ct_property_test.erl | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/lib/common_test/src/ct_property_test.erl b/lib/common_test/src/ct_property_test.erl new file mode 100644 index 0000000000..e401fef669 --- /dev/null +++ b/lib/common_test/src/ct_property_test.erl @@ -0,0 +1,178 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2003-2014. 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% +%% + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%% %%% +%%% WARNING %%% +%%% %%% +%%% This is experimental code which may be changed or removed %%% +%%% anytime without any warning. %%% +%%% %%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + + +%%% @doc EXPERIMENTAL support in common-test for calling property based tests. +%%% +%%% <p>This module is a first step towards running Property Based testing in the +%%% Common Test framework. A property testing tool like QuickCheck or PropEr is +%%% assumed to be installed.</p> +%%% +%%% <p>The idea is to have a common_test testsuite calling a property testing +%%% tool with special property test suites as defined by that tool. In this manual +%%% we assume the usual Erlang Application directory structure. The tests are +%%% collected in the application's <c>test</c> directory. The test directory +%%% has a sub-directory called <c>property_test</c> where everything needed for +%%% the property tests are collected.</p> +%%% +%%% <p>A typical ct test suite using <c>ct_property_test</c> is organized as follows: +%%% </p> +%%% ``` +%%% -include_lib("common_test/include/ct.hrl"). +%%% +%%% all() -> [prop_ftp_case]. +%%% +%%% init_per_suite(Config) -> +%%% ct_property_test:init_per_suite(Config). +%%% +%%% %%%---- test case +%%% prop_ftp_case(Config) -> +%%% ct_property_test:quickcheck( +%%% ftp_simple_client_server:prop_ftp(Config), +%%% Config +%%% ). +%%% ''' +%%% +%%% <warning> +%%% This is experimental code which may be changed or removed +%%% anytime without any warning. +%%% </warning> +%%% +%%% @end + +-module(ct_property_test). + +%% API +-export([init_per_suite/1, + quickcheck/2]). + +-include_lib("common_test/include/ct.hrl"). + +%%%----------------------------------------------------------------- +%%% @spec init_per_suite(Config) -> Config | {skip,Reason} +%%% +%%% @doc Initializes Config for property testing. +%%% +%%% <p>The function investigates if support is available for either Quickcheck or PropEr. +%%% The options <c>{property_dir,AbsPath}</c> and +%%% <c>{property_test_tool,Tool}</c> is set in the Config returned.</p> +%%% <p>The function is intended to be called in the init_per_suite in the test suite.</p> +%%% <p>The property tests are assumed to be in the subdirectory <c>property_test</c>.</p> +%%% @end + +init_per_suite(Config) -> + case which_module_exists([eqc,proper]) of + {ok,ToolModule} -> + ct:pal("Found property tester ~p",[ToolModule]), + Path = property_tests_path("property_test", Config), + case compile_tests(Path,ToolModule) of + error -> + {fail, "Property test compilation failed in "++Path}; + up_to_date -> + add_code_pathz(Path), + [{property_dir,Path}, + {property_test_tool,ToolModule} | Config] + end; + + not_found -> + ct:pal("No property tester found",[]), + {skip, "No property testing tool found"} + end. + +%%%----------------------------------------------------------------- +%%% @spec quickcheck(Property, Config) -> true | {fail,Reason} +%%% +%%% @doc Call quickcheck and return the result in a form suitable for common_test. +%%% +%%% <p>The function is intended to be called in the test cases in the test suite.</p> +%%% @end + +quickcheck(Property, Config) -> + Tool = proplists:get_value(property_test_tool,Config), + mk_ct_return( Tool:quickcheck(Property) ). + + +%%%================================================================ +%%% +%%% Local functions +%%% + +%%% Make return values back to the calling Common Test suite +mk_ct_return(true) -> + true; +mk_ct_return(Other) -> + try lists:last(hd(eqc:counterexample())) + of + {set,{var,_},{call,M,F,Args}} -> + {fail, io_lib:format("~p:~p/~p returned bad result",[M,F,length(Args)])} + catch + _:_ -> + {fail, Other} + end. + +%%% Check if a property testing tool is found +which_module_exists([Module|Modules]) -> + case module_exists(Module) of + true -> {ok,Module}; + false -> which_module_exists(Modules) + end; +which_module_exists(_) -> + not_found. + +module_exists(Module) -> + is_list(catch Module:module_info()). + +%%% The path to the property tests +property_tests_path(Dir, Config) -> + DataDir = proplists:get_value(data_dir, Config), + filename:join(lists:droplast(filename:split(DataDir))++[Dir]). + +%%% Extend the code path with Dir if it not already present +add_code_pathz(Dir) -> + case lists:member(Dir, code:get_path()) of + true -> ok; + false -> code:add_pathz(Dir) + end. + +compile_tests(Path, ToolModule) -> + MacroDefs = macro_def(ToolModule), + {ok,Cwd} = file:get_cwd(), + ok = file:set_cwd(Path), + {ok,FileNames} = file:list_dir("."), + BeamFiles = [F || F<-FileNames, + filename:extension(F) == ".beam"], + [file:delete(F) || F<-BeamFiles], + ct:pal("Compiling in ~p:~n Deleted ~p~n MacroDefs=~p",[Path,BeamFiles,MacroDefs]), + Result = make:all([load|MacroDefs]), + file:set_cwd(Cwd), + Result. + + +macro_def(eqc) -> [{d, 'EQC'}]; +macro_def(proper) -> [{d, 'PROPER'}]. + |