1%%% -*- coding: utf-8 -*-
2%%% -*- erlang-indent-level: 2 -*-
3%%% -------------------------------------------------------------------
4%%% Copyright 2020-     Manolis Papadakis <manopapad@gmail.com>,
5%%%                     Eirini Arvaniti <eirinibob@gmail.com>
6%%%                 and Kostis Sagonas <kostis@cs.ntua.gr>
7%%%
8%%% This file is part of PropEr.
9%%%
10%%% PropEr is free software: you can redistribute it and/or modify
11%%% it under the terms of the GNU General Public License as published by
12%%% the Free Software Foundation, either version 3 of the License, or
13%%% (at your option) any later version.
14%%%
15%%% PropEr is distributed in the hope that it will be useful,
16%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
17%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18%%% GNU General Public License for more details.
19%%%
20%%% You should have received a copy of the GNU General Public License
21%%% along with PropEr.  If not, see <http://www.gnu.org/licenses/>.
22
23%%% @copyright 2020 Manolis Papadakis, Eirini Arvaniti and Kostis Sagonas
24%%% @version {@version}
25%%% @author Kostis Sagonas
26
27%%
28%% Contains some tests for function generators
29%%
30-module(fun_tests).
31
32-include_lib("proper/include/proper.hrl").
33
34%%----------------------
35%% Properties that pass
36%%----------------------
37
38prop_fun_bool() ->
39  ?FORALL({F, X}, {function(1,boolean()), any()}, is_boolean(F(X))).
40
41%%-----------------------------
42%% Properties that should fail
43%%-----------------------------
44
45prop_fun_int_int() ->
46  ?FORALL({F, X}, {function([integer()],integer()), integer()}, F(X) < 42).
47
48prop_lists_map_filter() ->
49  ?FORALL({MapFun, FilterFun, List},
50	  {function([int()],any()), function([int()],bool()), list(int())},
51	  lists:map(MapFun, lists:filter(FilterFun, List)) =:=
52	    lists:filter(FilterFun, lists:map(MapFun, List))).
53