-module(map_validate).
-include_lib("eunit/include/eunit.hrl").

-define(SAMPLE, #{<<"name">> => <<"umgeher">>, email => <<"me@umgeher.org">>}).

returning_no_data_test() ->
  ?assertEqual({error, 'no data'}, utools:map_validate('not a map', #{})),
  ?assertEqual({error, 'no data'}, utools:map_validate(#{}, 'not a map')),
  ?assertEqual({error, 'no data'}, utools:map_validate('not a map', 'not a map')).
  
ok_without_doc_test() ->
  ?assertEqual(#{}, utools:map_validate(?SAMPLE, #{})).

ok_rule_required_test() ->
  Rule = #{
           key => <<"name">>,
           required => true
          },
  ?assertEqual(#{<<"name">> => <<"umgeher">>}, utools:map_validate(?SAMPLE, #{rules => [Rule]})).

error_required_missing_test() ->
  Rule = #{key => some, required => true},
  ?assertEqual({error, some}, utools:map_validate(?SAMPLE, #{rules => [Rule]})).

ok_rule_not_required_with_default_value_test() ->
  Rule = #{key => some, default => 123},
  ?assertEqual(#{some => 123}, utools:map_validate(?SAMPLE, #{rules => [Rule]})).

ok_merge_test() ->
  Rule = #{key => some, default => 123},
  ?assertEqual(maps:merge(?SAMPLE, #{some => 123}), utools:map_validate(?SAMPLE, #{merge => true, rules => [Rule]})).