-module(rps3_tests).
-import(rps3, [get_hands/0, winning_hand/1, why/2]).
-include_lib("eunit/include/eunit.hrl").
get_hands_test() ->
    ?assertEqual(3, length(get_hands())).
winning_hand_test() ->
    ?assertEqual(paper,     winning_hand([rock, paper])),
    ?assertEqual(scissors,  winning_hand([paper, scissors])),
    ?assertEqual(rock,      winning_hand([scissors, rock])),
    ?assertEqual(rock,      winning_hand([rock, rock, rock])),
    ?assertEqual(undefined, winning_hand([rock, paper, scissors])),
    ?assertEqual(paper,     winning_hand([rock, paper, paper])),
    ?assertEqual(paper,     winning_hand([rock, rock, paper])).
why_test() ->
    ?assertEqual("crushes", why(rock, scissors)),
    ?assertEqual("paper covers rock", why(paper, [rock])).