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proper_tests.erl
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proper_tests.erl
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%%% Copyright 2010-2011 Manolis Papadakis <manopapad@gmail.com>,
%%% Eirini Arvaniti <eirinibob@gmail.com>
%%% and Kostis Sagonas <kostis@cs.ntua.gr>
%%%
%%% This file is part of PropEr.
%%%
%%% PropEr is free software: you can redistribute it and/or modify
%%% it under the terms of the GNU General Public License as published by
%%% the Free Software Foundation, either version 3 of the License, or
%%% (at your option) any later version.
%%%
%%% PropEr is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%%% GNU General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with PropEr. If not, see <http://www.gnu.org/licenses/>.
%%% @copyright 2010-2011 Manolis Papadakis, Eirini Arvaniti and Kostis Sagonas
%%% @version {@version}
%%% @author Manolis Papadakis
%%% @doc This modules contains PropEr's Unit tests. You need the EUnit
%%% application to compile it.
-module(proper_tests).
-include("proper.hrl").
-include_lib("eunit/include/eunit.hrl").
%%------------------------------------------------------------------------------
%% Helper macros
%%------------------------------------------------------------------------------
%% NOTE: Never add long_result to Opts for these macros.
state_is_clean() ->
get() =:= [].
assertEqualsOneOf(_X, none) ->
ok;
assertEqualsOneOf(X, List) ->
?assert(lists:any(fun(Y) -> Y =:= X end, List)).
-define(_passes(Test),
?_passes(Test, [])).
-define(_passes(Test, Opts),
?_assertRun(true, Test, Opts, true)).
-define(_errorsOut(ExpReason, Test),
?_errorsOut(ExpReason, Test, [])).
-define(_errorsOut(ExpReason, Test, Opts),
?_assertRun({error,ExpReason}, Test, Opts, true)).
-define(_assertRun(ExpResult, Test, Opts, AlsoLongResult),
?_test(begin
?assertMatch(ExpResult, proper:quickcheck(Test,Opts)),
proper:clean_garbage(),
?assert(state_is_clean()),
case AlsoLongResult of
true ->
?assertMatch(ExpResult,
proper:quickcheck(Test,[long_result|Opts])),
proper:clean_garbage(),
?assert(state_is_clean());
false ->
ok
end
end)).
-define(_assertCheck(ExpShortResult, CExm, Test),
?_assertCheck(ExpShortResult, CExm, Test, [])).
-define(_assertCheck(ExpShortResult, CExm, Test, Opts),
?_test(?assertCheck(ExpShortResult, CExm, Test, Opts))).
-define(assertCheck(ExpShortResult, CExm, Test, Opts),
begin
?assertMatch(ExpShortResult, proper:check(Test,CExm,Opts)),
?assert(state_is_clean())
end).
-define(_fails(Test),
?_fails(Test, [])).
-define(_fails(Test, Opts),
?_failsWith(_, Test, Opts)).
-define(_failsWith(ExpCExm, Test),
?_failsWith(ExpCExm, Test, [])).
-define(_failsWith(ExpCExm, Test, Opts),
?_assertFailRun(ExpCExm, none, Test, Opts)).
-define(_failsWithOneOf(AllCExms, Test),
?_failsWithOneOf(AllCExms, Test, [])).
-define(_failsWithOneOf(AllCExms, Test, Opts),
?_assertFailRun(_, AllCExms, Test, Opts)).
-define(SHRINK_TEST_OPTS, [{start_size,10},{max_shrinks,10000}]).
-define(_shrinksTo(ExpShrunk, Type),
?_assertFailRun([ExpShrunk], none, ?FORALL(_X,Type,false),
?SHRINK_TEST_OPTS)).
-define(_shrinksToOneOf(AllShrunk, Type),
?_assertFailRun(_, [[X] || X <- AllShrunk], ?FORALL(_X,Type,false),
?SHRINK_TEST_OPTS)).
-define(_nativeShrinksTo(ExpShrunk, TypeStr),
?_assertFailRun([ExpShrunk], none,
?FORALL(_X,assert_can_translate(?MODULE,TypeStr),false),
?SHRINK_TEST_OPTS)).
-define(_nativeShrinksToOneOf(AllShrunk, TypeStr),
?_assertFailRun(_, [[X] || X <- AllShrunk],
?FORALL(_X,assert_can_translate(?MODULE,TypeStr),false),
?SHRINK_TEST_OPTS)).
-define(_assertFailRun(ExpCExm, AllCExms, Test, Opts),
?_test(begin
ShortResult = proper:quickcheck(Test, Opts),
CExm1 = get_cexm(),
?checkCExm(CExm1, ExpCExm, AllCExms, Test, Opts),
?assertEqual(false, ShortResult),
LongResult = proper:quickcheck(Test, [long_result|Opts]),
CExm2 = get_cexm(),
?checkCExm(CExm2, ExpCExm, AllCExms, Test, Opts),
?checkCExm(LongResult, ExpCExm, AllCExms, Test, Opts)
end)).
get_cexm() ->
CExm = proper:counterexample(),
proper:clean_garbage(),
?assert(state_is_clean()),
CExm.
-define(checkCExm(CExm, ExpCExm, AllCExms, Test, Opts),
begin
?assertCheck(false, CExm, Test, Opts),
?assertMatch(ExpCExm, CExm),
assertEqualsOneOf(CExm, AllCExms)
end).
-define(_assertTempBecomesN(N, ExpShortResult, Prop),
?_assertTempBecomesN(N, ExpShortResult, Prop, [])).
-define(_assertTempBecomesN(N, ExpShortResult, Prop, Opts),
?_test(begin
?assertMatch(ExpShortResult, proper:quickcheck(Prop,Opts)),
?assertEqual(N, get_temp()),
erase_temp(),
proper:clean_garbage(),
?assert(state_is_clean())
end)).
inc_temp() ->
inc_temp(1).
inc_temp(Inc) ->
case get(temp) of
undefined -> put(temp, Inc);
X -> put(temp, X + Inc)
end,
ok.
get_temp() ->
get(temp).
erase_temp() ->
erase(temp),
ok.
non_deterministic(Behaviour) ->
inc_temp(),
N = get_temp(),
{MustReset,Result} = get_result(N, 0, Behaviour),
case MustReset of
true -> erase_temp();
false -> ok
end,
Result.
get_result(N, Sum, [{M,Result}]) ->
{N >= Sum + M, Result};
get_result(N, Sum, [{M,Result} | Rest]) ->
NewSum = Sum + M,
case N =< NewSum of
true -> {false, Result};
false -> get_result(N, NewSum, Rest)
end.
setup_run_commands(Module, Cmds, Env) ->
Module:set_up(),
Res = proper_statem:run_commands(Module, Cmds, Env),
Module:clean_up(),
Res.
%%------------------------------------------------------------------------------
%% Helper Functions
%%------------------------------------------------------------------------------
assert_type_works({Type,Are,_Target,Arent,TypeStr}, IsSimple) ->
case Type of
none ->
ok;
_ ->
lists:foreach(fun(X) -> assert_is_instance(X,Type) end, Are),
assert_can_generate(Type, IsSimple),
lists:foreach(fun(X) -> assert_not_is_instance(X,Type) end, Arent)
end,
case TypeStr of
none ->
ok;
_ ->
TransType = assert_can_translate(?MODULE, TypeStr),
lists:foreach(fun(X) -> assert_is_instance(X,TransType) end, Are),
assert_can_generate(TransType, IsSimple),
lists:foreach(fun(X) -> assert_not_is_instance(X,TransType) end,
Arent)
end.
assert_can_translate(Mod, TypeStr) ->
proper_typeserver:start(),
Type = {Mod,TypeStr},
Result1 = proper_typeserver:translate_type(Type),
Result2 = proper_typeserver:translate_type(Type),
proper_typeserver:stop(),
?assert(state_is_clean()),
{ok,Type1} = Result1,
{ok,Type2} = Result2,
?assert(proper_types:equal_types(Type1,Type2)),
Type1.
assert_cant_translate(Mod, TypeStr) ->
proper_typeserver:start(),
Result = proper_typeserver:translate_type({Mod,TypeStr}),
proper_typeserver:stop(),
?assert(state_is_clean()),
?assertMatch({error,_}, Result).
%% TODO: after fixing the typesystem, use generic reverse function.
assert_is_instance(X, Type) ->
?assert(proper_types:is_inst(X, Type) andalso state_is_clean()).
assert_can_generate(Type, CheckIsInstance) ->
lists:foreach(fun(Size) -> try_generate(Type,Size,CheckIsInstance) end,
[1,2,5,10,20,40,50]).
try_generate(Type, Size, CheckIsInstance) ->
{ok,Instance} = proper_gen:pick(Type, Size),
?assert(state_is_clean()),
case CheckIsInstance of
true -> assert_is_instance(Instance, Type);
false -> ok
end.
assert_native_can_generate(Mod, TypeStr, CheckIsInstance) ->
assert_can_generate(assert_can_translate(Mod,TypeStr), CheckIsInstance).
assert_cant_generate(Type) ->
?assertEqual(error, proper_gen:pick(Type)),
?assert(state_is_clean()).
assert_cant_generate_cmds(Type, N) ->
?assertEqual(error, proper_gen:pick(?SUCHTHAT(T, Type, length(T) > N))),
?assert(state_is_clean()).
assert_not_is_instance(X, Type) ->
?assert(not proper_types:is_inst(X, Type) andalso state_is_clean()).
assert_function_type_works(FunType) ->
{ok,F} = proper_gen:pick(FunType),
%% TODO: this isn't exception-safe
?assert(proper_types:is_instance(F, FunType)),
assert_is_pure_function(F),
proper:global_state_erase(),
?assert(state_is_clean()).
assert_is_pure_function(F) ->
{arity,Arity} = erlang:fun_info(F, arity),
ArgsList = [lists:duplicate(Arity,0), lists:duplicate(Arity,1),
lists:seq(1,Arity), lists:seq(0,Arity-1)],
lists:foreach(fun(Args) -> ?assertEqual(apply(F,Args),apply(F,Args)) end,
ArgsList).
%%------------------------------------------------------------------------------
%% Unit test arguments
%%------------------------------------------------------------------------------
simple_types_with_data() ->
[{integer(), [-1,0,1,42,-200], 0, [0.3,someatom,<<1>>], "integer()"},
{integer(7,88), [7,8,87,88,23], 7, [1,90,a], "7..88"},
{integer(0,42), [0,11,42], 0, [-1,43], "0..42"},
{integer(-99,0), [-88,-99,0], 0, [1,-1112], "-99..0"},
{integer(-999,-12), [-34,-999,-12], -12, [0,5], "-999..-12"},
{integer(-99,21), [-98,0,21], 0, [-100], "-99..21"},
{integer(0,0), [0], 0, [1,-1,100,-100], "0..0"},
{pos_integer(), [12,1,444], 1, [-12,0], "pos_integer()"},
{non_neg_integer(), [42,0], 0, [-9,rr], "non_neg_integer()"},
{neg_integer(), [-222,-1], -1, [0,1111], "neg_integer()"},
{float(), [17.65,-1.12], 0.0, [11,atomm,<<>>], "float()"},
{float(7.4,88.0), [7.4,88.0], 7.4, [-1.0,3.2], none},
{float(0.0,42.1), [0.1,42.1], 0.0, [-0.1], none},
{float(-99.9,0.0), [-0.01,-90.0], 0.0, [someatom,-12,-100.0,0.1], none},
{float(-999.08,-12.12), [-12.12,-12.2], -12.12, [-1111.0,1000.0], none},
{float(-71.8,99.0), [-71.8,99.0,0.0,11.1], 0.0, [100.0,-71.9], none},
{float(0.0,0.0), [0.0], 0.0, [0.1,-0.1], none},
{non_neg_float(), [88.8,98.9,0.0], 0.0, [-12,1,-0.01], none},
{atom(), [elvis,'Another Atom',''], '', ["not_an_atom",12,12.2], "atom()"},
{binary(), [<<>>,<<12,21>>], <<>>, [<<1,2:3>>,binary_atom,42], "binary()"},
{binary(3), [<<41,42,43>>], <<0,0,0>>, [<<1,2,3,4>>], "<<_:3>>"},
{binary(0), [<<>>], <<>>, [<<1>>], none},
{bitstring(), [<<>>,<<87,76,65,5:4>>], <<>>, [{12,3},11], "bitstring()"},
{bitstring(18), [<<0,1,2:2>>,<<1,32,123:2>>], <<0,0,0:2>>, [<<12,1,1:3>>],
"<<_:18, _:_*1>>"},
{bitstring(32), [<<120,120,120,120>>], <<0,0,0,0>>, [7,8],
"<<_:32, _:_*1>>"},
{bitstring(0), [<<>>], <<>>, [<<1>>], none},
{list(integer()), [[],[2,42],[0,1,1,2,3,5,8,13,21,34,55,89,144]], [],
[[4,4.2],{12,1},<<12,113>>], "[integer()]"},
{list(atom()), [[on,the,third,day,'of',christmas,my,true,love,sent,to,me]],
[], [['not',1,list,'of',atoms],not_a_list], "[atom()]"},
{list(union([integer(),atom()])), [[3,french,hens,2],[turtle,doves]], [],
[{'and',1}], "[integer() | atom()]"},
{vector(5,atom()), [[partridge,in,a,pear,tree],[a,b,c,d,e]],
['','','','',''], [[a,b,c,d],[a,b,c,d,e,f]], none},
{vector(2,float()), [[0.0,1.1],[4.4,-5.5]], [0.0,0.0], [[1,1]], none},
{vector(0,integer()), [[]], [], [[1],[2]], none},
{union([good,bad,ugly]), [good,bad,ugly], good, [clint,"eastwood"],
"good | bad | ugly"},
{union([integer(),atom()]), [twenty_one,21], 0, ["21",<<21>>],
"integer() | atom()"},
{weighted_union([{10,luck},{20,skill},{15,concentrated_power_of_will},
{5,pleasure},{50,pain},{100,remember_the_name}]),
[skill,pain,pleasure], luck, [clear,20,50], none},
{{integer(0,42),list(atom())}, [{42,[a,b]},{21,[c,de,f]},{0,[]}], {0,[]},
[{-1,[a]},{12},{21,[b,c],12}], "{0..42,[atom()]}"},
{tuple([atom(),integer()]), [{the,1}], {'',0}, [{"a",0.0}],
"{atom(),integer()}"},
{{}, [{}], {}, [[],{1,2}], "{}"},
{loose_tuple(integer()), [{1,44,-1},{},{99,-99}], {}, [4,{hello,2},[1,2]],
none},
{loose_tuple(union([atom(),float()])), [{a,4.4,b},{},{'',c},{1.2,-3.4}],
{}, [an_atom,0.4,{hello,2},[aa,bb,3.1]], none},
{loose_tuple(list(integer())), [{[1,-1],[],[2,3,-12]},{}], {},
[[[1,2],[3,4]],{1,12},{[1,99,0.0],[]}], none},
{loose_tuple(loose_tuple(integer())), [{},{{}},{{1,2},{-1,11},{}}], {},
[{123},[{12},{24}]], none},
{exactly({[writing],unit,[tests,is],{2},boring}),
[{[writing],unit,[tests,is],{2},boring}],
{[writing],unit,[tests,is],{2},boring}, [no,its,'not','!'], none},
{[], [[]], [], [[a],[1,2,3]], "[]"},
{fixed_list([neg_integer(),pos_integer()]), [[-12,32],[-1,1]], [-1,1],
[[0,0]], none},
{[atom(),integer(),atom(),float()], [[forty_two,42,forty_two,42.0]],
['',0,'',0.0], [[proper,is,licensed],[under,the,gpl]], none},
{[42 | list(integer())], [[42],[42,44,22]], [42], [[],[11,12]], none},
{number(), [12,32.3,-9,-77.7], 0, [manolis,papadakis], "number()"},
{boolean(), [true,false], false, [unknown], "boolean()"},
{string(), ["hello","","world"], "", ['hello'], "string()"},
{?LAZY(integer()), [0,2,99], 0, [1.1], "integer()"},
{?LAZY(list(float())), [[0.0,1.2,1.99],[]], [], [1.1,[1,2]], "[float()]"},
{zerostream(10), [[0,0,0],[],[0,0,0,0,0,0,0]], [], [[1,0,0],[0.1]], none},
{?SHRINK(pos_integer(),[0]), [1,12,0], 0, [-1,-9,6.0], none},
{?SHRINK(float(),[integer(),atom()]), [1.0,0.0,someatom,'',42,0], 0,
[<<>>,"hello"], none},
{noshrink(?SHRINK(42,[0,1])), [42,0,1], 42, [-1], "42 | 0 | 1"},
{non_empty(list(integer())), [[1,2,3],[3,42],[11]], [0], [[],[0.1]],
"[integer(),...]"},
{default(42,float()), [4.1,-99.0,0.0,42], 42, [43,44], "42 | float()"},
{?SUCHTHAT(X,non_neg_integer(),X rem 4 =:= 1), [1,5,37,89], 1, [4,-12,11],
none},
{?SUCHTHATMAYBE(X,non_neg_integer(),X rem 4 =:= 1), [1,2,3,4,5,37,89], 0,
[1.1,2.2,-12], "non_neg_integer()"},
{any(), [1,-12,0,99.9,-42.2,0.0,an_atom,'',<<>>,<<1,2>>,<<1,2,3:5>>,[],
[42,<<>>],{},{tag,12},{tag,[vals,12,12.2],[],<<>>}],
0, [], "any()"},
{list(any()), [[<<>>,a,1,-42.0,{11.8,[]}]], [], [{1,aa},<<>>], "[any()]"},
{deeplist(), [[[],[]], [[[]],[]]], [], [[a]], "deeplist()"},
{none, [[234,<<1>>,[<<78>>,[]],0],[]], [], [21,3.1,[7.1],<<22>>],
"iolist()"},
{none, [[234,<<1>>,[<<78>>,[]],0],[],<<21,15>>], <<>>, [21,3.1,[7.1]],
"iodata()"}].
%% TODO: These rely on the intermediate form of the instances.
constructed_types_with_data() ->
[{?LET(X,range(1,5),X*X), [{'$used',1,1},{'$used',5,25}], 1,
[4,{'$used',3,8},{'$used',0,0}], none},
{?LET(L,non_empty(list(atom())),oneof(L)),
[{'$used',[aa],aa},{'$used',[aa,bb],aa},{'$used',[aa,bb],bb}], '',
[{'$used',[],''},{'$used',[aa,bb],cc}], none},
{?LET(X,pos_integer(),?LET(Y,range(0,X),X-Y)),
[{'$used',3,{'$used',2,1}},{'$used',9,{'$used',9,0}},
{'$used',5,{'$used',0,5}}], 1,
[{'$used',0,{'$used',0,0}},{'$used',3,{'$used',4,-1}},
{'$used',7,{'$used',6,2}}], none},
{?LET(Y,?LET(X,integer(),X*X),-Y),
[{'$used',{'$used',-9,81},-81},{'$used',{'$used',2,4},-4}], 0,
[{'$used',{'$used',1,2},-2},{'$used',{'$used',3,9},9}], none},
{?SUCHTHAT(Y,?LET(X,oneof([1,2,3]),X+X),Y>3),
[{'$used',2,4},{'$used',3,6}], 4, [{'$used',1,2}], none},
{?LET(X,?SUCHTHAT(Y,pos_integer(),Y=/=0),X*X),
[{'$used',3,9},{'$used',1,1},{'$used',11,121}], 1,
[{'$used',-1,1},{'$used',0,0}], none},
{tree(integer()), [{'$used',[null,null],{node,42,null,null}},
{'$used',[{'$used',[null,null],{node,2,null,null}},
{'$used',[null,null],{node,3,null,null}}],
{node,-1,{node,2,null,null},{node,3,null,null}}},
{'$to_part',null},
{'$to_part',{'$used',[null,null],{node,7,null,null}}}],
null, [{'$used',[null,null],{node,1.1,null,null}}], "tree(integer())"},
{?LETSHRINK(L,[],{tag,L}), [{'$used',[],{tag,[]}}], {tag,[]}, [], none},
{?LETSHRINK(L,non_empty(list(atom())),{tag,L}),
[{'$used',[aa],{tag,[aa]}},{'$to_part',aa}], '', [], none},
{a(), [aleaf, {'$used',[aleaf],{anode,aleaf,bleaf}},
{'$used',[aleaf],{anode,aleaf,{'$to_part',bleaf}}}],
aleaf, [], "a()"},
{b(), [bleaf, {'$used',[bleaf],{bnode,aleaf,bleaf}},
{'$used',[bleaf],{bnode,{'$to_part',aleaf},bleaf}}],
bleaf, [], "b()"},
{gen_tree(integer()),
[{'$used',[null,null],{12,[null,null]}},{'$to_part',null}],
null, [{'$used',[],{42,[]}}], "gen_tree(integer())"},
{none, [{'$used',[],{tag,[]}}, {'$used',[null,null],{tag,[null,null]}},
{'$used',[{'$used',[],{tag,[]}},{'$to_part',null}],
{tag,[{tag,[]},null]}}, {'$to_part',{'$used',[],{tag,[]}}}],
null, [], "g()"},
{none, [{'$used',[null],{tag,[{ok,null}]}}, {'$to_part',null},
{'$used',[null,null],{tag,[{ok,null},{ok,null}]}}],
null, [], "h()"},
{none, [{'$used',[null,null,{'$used',[null],{tag,null,[]}}],
{tag,null,[null,{tag,null,[]}]}}, {'$to_part',null}],
null, [], "i()"},
{none, [{'$used',[{'$to_part',null},{'$used',[null],{one,null}},null,null],
{tag,null,{one,null},[null,null],[null]}}], null, [], "j()"},
{none, [{tag,[]}, {tag,[{null,null}]},
{tag,[{{tag,[]},null},{null,{tag,[]}}]}],
null, [{'$to_part',null}], "k()"},
{none, [{'$used',[null,null,{'$used',[null,null],{tag,null,[null]}}],
{tag,null,[null,{tag,null,[null]}]}}, {'$to_part',null}],
null, [{'$used',[null],{tag,null,[]}}], "l()"}].
function_types() ->
[{function([],atom()), "fun(() -> atom())"},
{function([integer(),integer()],atom()),
"fun((integer(),integer()) -> atom())"},
{function(5,union([a,b])), "fun((_,_,_,_,_) -> a | b)"},
{function(0,function(1,integer())),
"fun(() -> fun((_) -> integer()))"}].
remote_native_types() ->
[{types_test1,["#rec1{}","rec1()","exp1()","type1()","type2(atom())",
"rem1()","rem2()","types_test1:exp1()",
"types_test2:exp1(float())","types_test2:exp2()"]},
{types_test2,["exp1(#rec1{})","exp2()","#rec1{}","types_test1:exp1()",
"types_test2:exp1(binary())","types_test2:exp2()"]}].
impossible_types() ->
[?SUCHTHAT(X, pos_integer(), X =< 0),
?SUCHTHAT(X, non_neg_integer(), X < 0),
?SUCHTHAT(X, neg_integer(), X >= 0),
?SUCHTHAT(X, integer(1,10), X > 20),
?SUCHTHAT(X, float(0.0,10.0), X < 0.0),
?SUCHTHAT(L, vector(12,integer()), length(L) =/= 12),
?SUCHTHAT(B, binary(), lists:member(256,binary_to_list(B))),
?SUCHTHAT(X, exactly('Lelouch'), X =:= 'vi Brittania')].
impossible_native_types() ->
[{types_test1, ["1.1","no_such_module:type1()","no_such_type()"]},
{types_test2, ["types_test1:type1()","function()","fun((...) -> atom())",
"pid()","port()","ref()"]}].
recursive_native_types() ->
[{rec_test1, ["a()","b()","a()|b()","d()","f()","deeplist()",
"mylist(float())","aa()","bb()","expc()"]},
{rec_test2, ["a()","expa()","rec()"]}].
impossible_recursive_native_types() ->
[{rec_test1, ["c()","e()","cc()","#rec{}","expb()"]},
{rec_test2, ["b()","#rec{}","aa()"]}].
symb_calls() ->
[{[3,2,1], "lists:reverse([1,2,3])", [], {call,lists,reverse,[[1,2,3]]}},
{[a,b,c,d], "erlang:'++'([a,b],[c,d])",
[{a,some_value}], {call,erlang,'++',[[a,b],[c,d]]}},
{42, "erlang:'*'(erlang:'+'(3,3),erlang:'-'(8,1))",
[{b,dummy_value},{e,another_dummy}],
{call,erlang,'*',[{call,erlang,'+',[3,3]},{call,erlang,'-',[8,1]}]}},
{something, "something",
[{a,somebody},{b,put},{c,something},{d,in_my_drink}], {var,c}},
{{var,b}, "{var,b}", [{a,not_this},{c,neither_this}], {var,b}},
{42, "erlang:'+'(40,2)", [{m,40},{n,2}],
{call,erlang,'+',[{var,m},{var,n}]}},
{[i,am,{var,iron},man],
"erlang:'++'(lists:reverse([am,i]),erlang:'++'([{var,iron}],[man]))",
[{a,man},{b,woman}],
{call,erlang,'++',[{call,lists,reverse,[[am,i]]},
{call,erlang,'++',[[{var,iron}],[{var,a}]]}]}}].
undefined_symb_calls() ->
[{call,erlang,error,[an_error]},
{call,erlang,throw,[a_throw]},
{call,erlang,exit,[an_exit]},
{call,lists,reverse,[<<12,13>>]},
{call,erlang,'+',[1,2,3]}].
combinations() ->
[{[{1,[1,3,5,7,9,10]}, {2,[2,4,6,8,11]}], 5, 11, [1,2,3,4,5,6,7,8,9,10,11],
2, 2, [{1,[1,3,5,7,8,11]}, {2,[2,4,6,9,10]}]},
{[{1,[1,3,5]}, {2,[7,8,9]}, {3,[2,4,6]}], 3, 9, [1,3,5,7,8,9], 3, 2,
[{1,[6,8,9]}, {2,[1,3,5]}, {3,[2,4,7]}]}].
first_comb() ->
[{10,3,3,[{1,[7,8,9,10]}, {2,[4,5,6]}, {3,[1,2,3]}]},
{11,5,2,[{1,[6,7,8,9,10,11]}, {2,[1,2,3,4,5]}]},
{12,3,4,[{1,[10,11,12]}, {2,[7,8,9]}, {3,[4,5,6]}, {4,[1,2,3]}]}].
lists_to_zip() ->
[{[],[],[]},
{[], [dummy, atom], []},
{[1, 42, 1, 42, 1, 2 ,3], [], []},
{[a, b, c], lists:seq(1,6), [{a,1}, {b,2}, {c,3}]},
{[a, b, c], lists:seq(1,3), [{a,1}, {b,2}, {c,3}]},
{[a, d, d, d, d], lists:seq(1,3), [{a,1}, {d,2}, {d,3}]}].
command_names() ->
[{[{set,{var,1},{call,erlang,put,[a,0]}},
{set,{var,3},{call,erlang,erase,[a]}},
{set,{var,4},{call,erlang,get,[b]}}],
[{erlang,put,2},
{erlang,erase,1},
{erlang,get,1}]},
{[{set,{var,1},{call,foo,bar,[]}},
{set,{var,2},{call,bar,foo,[a,{var,1}]}},
{set,{var,3},{call,bar,foo,[a,[[3,4]]]}}],
[{foo,bar,0},
{bar,foo,2},
{bar,foo,2}]},
{[],[]}].
valid_command_sequences() ->
%% {module, initial_state, command_sequence, symbolic_state_after,
%% dynamic_state_after,initial_environment}
[{pdict_statem, [], [{init,[]},
{set,{var,1},{call,erlang,put,[a,0]}},
{set,{var,2},{call,erlang,put,[b,1]}},
{set,{var,3},{call,erlang,erase,[a]}},
{set,{var,4},{call,erlang,get,[b]}},
{set,{var,5},{call,erlang,erase,[b]}},
{set,{var,6},{call,erlang,put,[a,4]}},
{set,{var,7},{call,erlang,put,[a,42]}}],
[{a,42}], [{a,42}], []},
{pdict_statem, [], [{init,[]},
{set,{var,1},{call,erlang,put,[b,5]}},
{set,{var,2},{call,erlang,erase,[b]}},
{set,{var,3},{call,erlang,put,[a,5]}}],
[{a,5}], [{a,5}], []},
{pdict_statem, [], [{init,[]},
{set,{var,1},{call,erlang,put,[a,{var,start_value}]}},
{set,{var,2},{call,erlang,put,
[b,{var,another_start_value}]}},
{set,{var,3},{call,erlang,get,[b]}},
{set,{var,4},{call,erlang,get,[b]}}],
[{b,{var,another_start_value}}, {a,{var,start_value}}], [{b,-1}, {a, 0}],
[{start_value, 0}, {another_start_value, -1}]}].
symbolic_init_invalid_sequences() ->
%% {module, command_sequence, environment, shrunk}
[{pdict_statem, [{init,[{a,{call,foo,bar,[some_arg]}}]},
{set,{var,1},{call,erlang,put,[b,42]}},
{set,{var,2},{call,erlang,get,[b]}}],
[{some_arg, 0}],
[{init,[{a,{call,foo,bar,[some_arg]}}]}]}].
invalid_precondition() ->
%% {module, command_sequence, environment, shrunk}
[{pdict_statem, [{init,[]},
{set,{var,1},{call,erlang,put,[a,0]}},
{set,{var,2},{call,erlang,put,[b,1]}},
{set,{var,3},{call,erlang,erase,[a]}},
{set,{var,4},{call,erlang,get,[a]}}],
[], [{set,{var,4},{call,erlang,get,[a]}}]}].
invalid_var() ->
[{pdict_statem, [{init,[]},
{set,{var,2},{call,erlang,put,[b,{var,1}]}}]},
{pdict_statem, [{init,[]},
{set,{var,1},{call,erlang,put,[b,9]}},
{set,{var,5},{call,erlang,put,[a,3]}},
{set,{var,6},{call,erlang,get,[{var,2}]}}]}].
arguments_not_defined() ->
[{[simple,atoms,are,valid,{var,42}], []},
{[{var,1}], [{var,2},{var,3},{var,4}]},
{[hello,world,[hello,world,{var,6}]], []},
{[{1,2,3,{var,1},{var,2}},not_really], []},
{[[[[42,{var,42}]]]], []},
{[{43,41,{1,{var,42}}},why_not], []}].
%%------------------------------------------------------------------------------
%% Unit tests
%%------------------------------------------------------------------------------
%% TODO: write tests for old datatypes, use old tests
%% TODO: check output redirection, quiet, verbose, to_file, on_output/2 (maybe
%% by writing to a string in the process dictionary), statistics printing,
%% standard verbose behaviour
%% TODO: fix compiler warnings
%% TODO: LET and LETSHRINK testing (these need their intermediate form for
%% standalone instance testing and shrinking) - update needed after
%% fixing the internal shrinking in LETs, use recursive datatypes, like
%% trees, for testing, also test with noshrink and LAZY
%% TODO: use size=100 for is_instance testing?
%% TODO: typeserver: check that the same type is returned for consecutive calls,
%% even with no caching (no_caching option?)
%% TODO: typeserver: recursive types containing functions
%% TODO: ?LET, ?LETSHRINK: only the top-level base type can be a native type
%% TODO: Test with native types: ?SUCHTHATMAYBE, noshrink, ?LAZY, ?SHRINK,
%% resize, ?SIZED
%% TODO: no debug_info at compile time => call, not type
%% no debug_info at runtime => won't find type
%% no module in code path at runtime => won't find type
%% TODO: try some more expressions with a ?FORALL underneath
%% TODO: various constructors like '|' (+ record notation) are parser-rejected
%% TODO: test nonempty recursive lists
%% TODO: test list-recursive with instances
%% TODO: more ADT tests: check bad declarations, bad variable use, multi-clause,
%% is_subtype, unacceptable range, unexported opaque, no-specs opaque,
%% unexported/unspecced functions, unbound variables, check as constructed
%% TODO: module, check_spec, check_module_specs, retest_spec (long result mode
%% too, other options pass)
%% TODO: proper_typeserver:is_instance (with existing types too, plus types we
%% can't produce, such as impropers) (also check that everything we
%% produce based on a type is an instance)
%% TODO: check that functions that throw exceptions pass
%% TODO: property inside a ?TIMEOUT returning false
%% TODO: some branch of a ?FORALL has a collect while another doesn't
%% TODO: symbolic functions returning functions are evaluated?
%% TODO: pure_check
%% TODO: spec_timeout option
%% TODO: defined option precedence
%% TODO: conversion of maybe_improper_list
%% TODO: use demo_is_instance and demo_translate_type
%% TODO: debug option to output tests passed, fail reason, etc.
simple_types_test_() ->
[?_test(assert_type_works(TD, true)) || TD <- simple_types_with_data()].
constructed_types_test_() ->
[?_test(assert_type_works(TD, false))
|| TD <- constructed_types_with_data()].
%% TODO: specific test-starting instances would be useful here
%% (start from valid Xs)
shrinks_to_test_() ->
[?_shrinksTo(Target, Type)
|| {Type,_Xs,Target,_Ys,_TypeStr} <- simple_types_with_data()
++ constructed_types_with_data(),
Type =/= none].
native_shrinks_to_test_() ->
[?_nativeShrinksTo(Target, TypeStr)
|| {_Type,_Xs,Target,_Ys,TypeStr} <- simple_types_with_data()
++ constructed_types_with_data(),
TypeStr =/= none].
cant_generate_test_() ->
[?_test(assert_cant_generate(Type)) || Type <- impossible_types()].
native_cant_translate_test_() ->
[?_test(assert_cant_translate(Mod,TypeStr))
|| {Mod,Strings} <- impossible_native_types(), TypeStr <- Strings].
remote_native_types_test_() ->
[?_test(assert_can_translate(Mod,TypeStr))
|| {Mod,Strings} <- remote_native_types(), TypeStr <- Strings].
recursive_native_types_test_() ->
[?_test(assert_native_can_generate(Mod,TypeStr,false))
|| {Mod,Strings} <- recursive_native_types(), TypeStr <- Strings].
recursive_native_cant_translate_test_() ->
[?_test(assert_cant_translate(Mod,TypeStr))
|| {Mod,Strings} <- impossible_recursive_native_types(),
TypeStr <- Strings].
random_functions_test_() ->
[[?_test(assert_function_type_works(FunType)),
?_test(assert_function_type_works(assert_can_translate(proper,TypeStr)))]
|| {FunType,TypeStr} <- function_types()].
parse_transform_test_() ->
[?_passes(auto_export_test1:prop_1()),
?_assertError(undef, auto_export_test2:prop_1()),
?_assertError(undef, no_native_parse_test:prop_1()),
?_passes(no_out_of_forall_test:prop_1()),
?_passes(no_out_of_forall_test:prop_2()),
?_passes(no_out_of_forall_test:prop_3()),
?_passes(no_out_of_forall_test:prop_4())].
native_type_props_test_() ->
[?_passes(?FORALL({X,Y}, {my_native_type(),my_proper_type()},
is_integer(X) andalso is_atom(Y))),
?_passes(?FORALL([X,Y,Z],
[my_native_type(),my_proper_type(),my_native_type()],
is_integer(X) andalso is_atom(Y) andalso is_integer(Z))),
?_passes(?FORALL([Y,X,{Z,W}],
[my_proper_type() | [my_native_type()]] ++
[{my_native_type(),my_proper_type()}],
is_integer(X) andalso is_atom(Y) andalso is_integer(Z)
andalso is_atom(W))),
?_passes(?FORALL([X|Y], [my_native_type()|my_native_type()],
is_integer(X) andalso is_integer(Y))),
?_passes(?FORALL(X, type_and_fun(), is_atom(X))),
?_passes(?FORALL(X, type_only(), is_integer(X))),
?_passes(?FORALL(L, [integer()], length(L) =:= 1)),
?_fails(?FORALL(L, id([integer()]), length(L) =:= 1)),
?_passes(?FORALL(_, types_test1:exp1(), true)),
?_assertError(undef, ?FORALL(_,types_test1:rec1(),true)),
?_assertError(undef, ?FORALL(_,no_such_module:some_call(),true)),
{setup, fun() -> code:purge(to_remove),
code:delete(to_remove),
code:purge(to_remove),
file:rename("tests/to_remove.beam",
"tests/to_remove.bak") end,
fun(_) -> file:rename("tests/to_remove.bak",
"tests/to_remove.beam") end,
?_passes(?FORALL(_, to_remove:exp1(), true))},
?_passes(rec_props_test1:prop_1()),
?_passes(rec_props_test2:prop_2()),
?_passes(?FORALL(L, vector(2,my_native_type()),
length(L) =:= 2
andalso lists:all(fun erlang:is_integer/1, L))),
?_passes(?FORALL(F, function(0, my_native_type()), is_integer(F()))),
?_passes(begin
Foo = function(0, my_native_type()),
?FORALL(F, Foo, is_integer(F()))
end),
?_passes(?FORALL(X, union([my_proper_type(),my_native_type()]),
is_integer(X) orelse is_atom(X))),
?_passes(begin
Vector5 = fun(T) -> vector(5, T) end,
?FORALL(V, Vector5(types_test1:exp1()), length(V) =:= 5)
end),
?_passes(?FORALL(X, ?SUCHTHAT(Y,types_test1:exp1(),is_atom(Y)),
is_atom(X))),
?_passes(?FORALL(L,non_empty(lof()),length(L) > 0)),
?_passes(?FORALL(X, ?LET(L,lof(),lists:min([99999.9|L])),
is_float(X))),
?_shrinksTo(0, ?LETSHRINK([X],[my_native_type()],{'tag',X})),
?_passes(weird_types:prop_export_all_works()),
?_passes(weird_types:prop_no_auto_import_works())].
-record(untyped, {a, b = 12}).
-type untyped() :: #untyped{}.
true_props_test_() ->
[?_passes(?FORALL(X,integer(),X < X + 1)),
?_passes(?FORALL(X,atom(),list_to_atom(atom_to_list(X)) =:= X)),
?_passes(?FORALL(L,list(integer()),is_sorted(L,quicksort(L)))),
?_passes(?FORALL(L,ulist(integer()),is_sorted(L,lists:usort(L)))),
?_passes(?FORALL(L,non_empty(list(integer())),L =/= [])),
?_passes(?FORALL({I,L}, {integer(),list(integer())},
?IMPLIES(no_duplicates(L),
not lists:member(I,lists:delete(I,L))))),
?_passes(?FORALL(L, ?SIZED(Size,resize(Size div 5,list(integer()))),
length(L) =< 20), [{max_size,100}]),
%% TODO: check that the samples are collected correctly
?_passes(?FORALL(L, list(integer()),
collect(length(L), collect(L =:= [],
lists:reverse(lists:reverse(L)) =:= L)))),
?_passes(?FORALL(L, list(integer()),
aggregate(smaller_lengths_than_my_own(L), true))),
?_assertTempBecomesN(300, true,
numtests(300,?FORALL(_,1,begin inc_temp(),true end))),
?_assertTempBecomesN(30, true, ?FORALL(X, ?SIZED(Size,Size),
begin inc_temp(X),true end),
[{numtests,12},{max_size,4}]),
?_assertTempBecomesN(12, true,
?FORALL(X, ?SIZED(Size,Size),
begin inc_temp(X),true end),
[{numtests,3},{start_size,4},{max_size,4}]),
?_passes(?FORALL(X, integer(), ?IMPLIES(abs(X) > 1, X * X > X))),
?_passes(?FORALL(X, integer(), ?IMPLIES(X >= 0, true))),
?_passes(?FORALL({X,Lim}, {int(),?SIZED(Size,Size)}, abs(X) =< Lim)),
?_passes(?FORALL({X,Lim}, {nat(),?SIZED(Size,Size)}, X =< Lim)),
?_passes(?FORALL(L, orderedlist(integer()), is_sorted(L))),
?_passes(conjunction([
{one, ?FORALL(_, integer(), true)},
{two, ?FORALL(X, integer(), collect(X > 0, true))},
{three, conjunction([{a,true},{b,true}])}
])),
?_passes(?FORALL(X, untyped(), is_record(X, untyped))),
?_passes(pdict_statem:prop_pdict()),
?_passes(symb_statem:prop_simple()),
{timeout, 20, ?_passes(symb_statem:prop_parallel_simple())},
{timeout, 10, ?_passes(ets_statem:prop_ets())},
{timeout, 20, ?_passes(ets_statem:prop_parallel_ets())},
{timeout, 20, ?_passes(pdict_fsm:prop_pdict())}].
false_props_test_() ->
[?_failsWith([[_Same,_Same]],
?FORALL(L,list(integer()),is_sorted(L,lists:usort(L)))),
?_failsWith([[_Same,_Same],_Same],
?FORALL(L, non_empty(list(union([a,b,c,d]))),
?FORALL(X, elements(L),
not lists:member(X,lists:delete(X,L))))),
?_failsWith(['\000\000\000\000'],
?FORALL(A, atom(), length(atom_to_list(A)) < 4)),
%% TODO: check that these only run once
?_failsWith([1], ?FORALL(X, non_neg_integer(),
case X > 0 of
true -> throw(not_zero);
false -> true
end)),
?_fails(?FORALL(_,1,lists:min([]) > 0)),
?_failsWith([[12,42]], ?FORALL(L, [12,42|list(integer())],
case lists:member(42, L) of
true -> erlang:exit(you_got_it);
false -> true
end)),
?_fails(?FORALL(_, integer(), ?TIMEOUT(100,timer:sleep(150) =:= ok))),
?_failsWith([20], ?FORALL(X, pos_integer(), ?TRAPEXIT(creator(X) =:= ok))),
?_assertTempBecomesN(7, false,
?FORALL(X, ?SIZED(Size,integer(Size,Size)),
begin inc_temp(), X < 5 end),
[{numtests,5}, {max_size,5}]),
%% it runs 2 more times: one while shrinking (recursing into the property)
%% and one when the minimal input is rechecked
?_assertTempBecomesN(2, false,
?FORALL(L, list(atom()),
?WHENFAIL(inc_temp(),length(L) < 5))),
?_assertTempBecomesN(3, false,
?FORALL(S, ?SIZED(Size,Size),
begin inc_temp(), S < 20 end),
[{numtests,3},{max_size,40},noshrink]),
?_failsWithOneOf([[{true,false}],[{false,true}]],
?FORALL({B1,B2}, {boolean(),boolean()}, equals(B1,B2))),
?_failsWith([2,1],
?FORALL(X, integer(1,10), ?FORALL(Y, integer(1,10), X =< Y))),
?_failsWith([1,2],
?FORALL(Y, integer(1,10), ?FORALL(X, integer(1,10), X =< Y))),
?_failsWithOneOf([[[0,1]],[[0,-1]],[[1,0]],[[-1,0]]],
?FORALL(L, list(integer()), lists:reverse(L) =:= L)),
?_failsWith([[1,2,3,4,5,6,7,8,9,10]],
?FORALL(_L, shuffle(lists:seq(1,10)), false)),
%% TODO: check that these don't shrink
?_fails(?FORALL(_, integer(0,0), false)),
?_fails(?FORALL(_, float(0.0,0.0), false)),
?_fails(fails(?FORALL(_, integer(), false))),
?_failsWith([16], ?FORALL(X, ?LET(Y,integer(),Y*Y), X < 15)),
?_failsWith([0.0],
?FORALL(_, ?LETSHRINK([A,B], [float(),atom()], {A,B}), false)),
?_failsWith([], conjunction([{some,true},{thing,false}])),
?_failsWith([{2,1},[{group,[[{sub_group,[1]}]]},{stupid,[1]}]],
?FORALL({X,Y}, {pos_integer(),pos_integer()},
conjunction([
{add_next, ?IMPLIES(X > Y, X + 1 > Y)},
{symmetry,
conjunction([
{add_sym, collect(X+Y, X+Y =:= Y+X)},
{sub_sym,
?WHENFAIL(io:format("'-' isn't symmetric!~n",[]),
X-Y =:= Y-X)}
])},
{group,
conjunction([
{add_group,
?WHENFAIL(io:format("This shouldn't happen!~n",[]),
?FORALL(Z, pos_integer(),
(X+Y)+Z =:= X+(Y+Z)))},
{sub_group,
?WHENFAIL(io:format("'-' doesn't group!~n",[]),
?FORALL(W, pos_integer(),
(X-Y)-W =:= X-(Y-W)))}
])},
{stupid, ?FORALL(_, pos_integer(), throw(woot))}
]))),
{timeout, 20, ?_fails(ets_counter:prop_ets_counter())},
?_fails(post_false:prop_simple()),
?_fails(error_statem:prop_simple())].
error_props_test_() ->
[?_errorsOut(cant_generate,
?FORALL(_, ?SUCHTHAT(X, pos_integer(), X =< 0), true)),
?_errorsOut(cant_satisfy,
?FORALL(X, pos_integer(), ?IMPLIES(X =< 0, true))),
?_errorsOut(type_mismatch,
?FORALL({X,Y}, [integer(),integer()], X < Y)),
?_assertCheck({error,rejected}, [2],
?FORALL(X, integer(), ?IMPLIES(X > 5, X < 6))),
?_assertCheck({error,too_many_instances}, [1,ab],
?FORALL(X, pos_integer(), X < 0)),
?_errorsOut(cant_generate, prec_false:prop_simple()),
?_errorsOut(cant_generate, nogen_statem:prop_simple()),
?_errorsOut(non_boolean_result, ?FORALL(_, integer(), not_a_boolean)),
?_errorsOut(non_boolean_result,
?FORALL(_, ?SHRINK(42,[0]),
non_deterministic([{2,false},{1,not_a_boolean}]))),
?_assertRun(false,
?FORALL(_, ?SHRINK(42,[0]),
non_deterministic([{4,false},{1,true}])),
[], false),
?_assertRun(false,
?FORALL(_, ?SHRINK(42,[0]),
non_deterministic([{3,false},{1,true},{1,false}])),
[], false)].
eval_test_() ->
[?_assertEqual(Result, eval(Vars,SymbCall))
|| {Result,_Repr,Vars,SymbCall} <- symb_calls()].
pretty_print_test_() ->
[?_assert(equal_ignoring_ws(Repr, proper_symb:pretty_print(Vars,SymbCall)))
|| {_Result,Repr,Vars,SymbCall} <- symb_calls()].
not_defined_test_() ->
[?_assertNot(defined(SymbCall))
|| SymbCall <- undefined_symb_calls()].
options_test_() ->
[?_assertTempBecomesN(300, true,
?FORALL(_, 1, begin inc_temp(), true end),
[{numtests,300}]),
?_assertTempBecomesN(300, true,
?FORALL(_, 1, begin inc_temp(), true end),
[300]),
?_failsWith([42], ?FORALL(_,?SHRINK(42,[0,1]),false), [noshrink]),
?_failsWith([42], ?FORALL(_,?SHRINK(42,[0,1]),false), [{max_shrinks,0}]),
?_fails(?FORALL(_,integer(),false), [fails]),
?_assertRun({error,cant_generate},
?FORALL(_,?SUCHTHAT(X,pos_integer(),X > 0),true),
[{constraint_tries,0}], true),
?_failsWith([12],
?FORALL(_,?SIZED(Size,integer(Size,Size)),false),
[{start_size,12}])].
adts_test_() ->
[{timeout, 20, % for Kostis' old laptop
?_passes(?FORALL({X,S},{integer(),set()},
sets:is_element(X,sets:add_element(X,S))), [20])},
?_passes(?FORALL({X,Y,D},
{integer(),float(),dict(integer(),float())},
dict:fetch(X,dict:store(X,Y,eval(D))) =:= Y), [30]),
?_fails(?FORALL({X,D},
{boolean(),dict(boolean(),integer())},
dict:erase(X, dict:store(X,42,D)) =:= D))].
parameter_test_() ->
?_passes(?FORALL(List, [zero1(),zero2(),zero3(),zero4()],
begin
[?assertMatch(undefined, proper_types:parameter(P))
|| P <- [x1,x2,y2,x3,y3,x4,y4,v,w,z]],
lists:all(fun is_zero/1, List)
end)).
zip_test_() ->
[?_assertEqual(proper_statem:zip(X, Y), Expected)
|| {X,Y,Expected} <- lists_to_zip()].
command_names_test_() ->
[?_assertEqual(proper_statem:command_names(Cmds), Expected)
|| {Cmds,Expected} <- command_names()].
valid_cmds_test_() ->
[?_assert(proper_statem:is_valid(Mod, State, Cmds, Env))
|| {Mod,State,Cmds,_,_,Env} <- valid_command_sequences()].
invalid_cmds_test_() ->
[?_assertNot(proper_statem:is_valid(Mod, Mod:initial_state(), Cmds, []))
|| {Mod,Cmds,_,_} <- invalid_precondition()] ++
[?_assertNot(proper_statem:is_valid(Mod, Mod:initial_state(), Cmds, []))
|| {Mod,Cmds} <- invalid_var()].
state_after_test_() ->
[?_assertEqual(proper_statem:state_after(Mod, Cmds), StateAfter)
|| {Mod,_,Cmds,StateAfter,_,_} <- valid_command_sequences()].
cannot_generate_commands_test_() ->
[?_test(assert_cant_generate_cmds(proper_statem:commands(Mod), 6))
|| Mod <- [prec_false]].
can_generate_commands0_test_() ->
[?_test(assert_can_generate(proper_statem:commands(Mod), false))
|| Mod <- [pdict_statem]].
can_generate_commands1_test_() ->
[?_test(assert_can_generate(proper_statem:commands(Mod, StartState), false))
|| {Mod,StartState} <- [{pdict_statem,[{a,1},{b,1},{c,100}]}]].