rebar3_rustler

-module({{name}}).

-export([ add/2
        , my_map/0
        , my_maps/0
        , my_tuple/0
        , unit_enum_echo/1
        , tagged_enum_echo/1
        , untagged_enum_echo/1
        ]).

-include("crates.hrl").
-on_load(init/0).
-define(NOT_LOADED, not_loaded(?LINE)).

%%%===================================================================
%%% API
%%%===================================================================

add(_A, _B) ->
    ?NOT_LOADED.

my_map() ->
    ?NOT_LOADED.

my_maps() ->
    ?NOT_LOADED.

my_tuple() ->
    ?NOT_LOADED.

unit_enum_echo(_Atom) ->
    ?NOT_LOADED.

tagged_enum_echo(_Tagged) ->
    ?NOT_LOADED.

untagged_enum_echo(_Untagged) ->
    ?NOT_LOADED.

%%%===================================================================
%%% NIF
%%%===================================================================

init() ->
    ?load_nif_from_crate({{app_name}}, ?crate_{{name}}, 0).

not_loaded(Line) ->
    erlang:nif_error({not_loaded, [{module, ?MODULE}, {line, Line}]}).

%%%===================================================================
%%% Tests
%%%===================================================================

-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").

add_test() ->
    ?assertEqual(4, add(2, 2)).

my_map_test() ->
    ?assertEqual(#{lhs => 33, rhs => 21}, my_map()).

my_maps_test() ->
    ?assertEqual([#{lhs => 33, rhs => 21}, #{lhs => 33, rhs => 21}], my_maps()).

my_tuple_test() ->
    ?assertEqual({33, 21}, my_tuple()).

unit_enum_echo_test() ->
    ?assertEqual(foo_bar, unit_enum_echo(foo_bar)),
    ?assertEqual(baz, unit_enum_echo(baz)).

tagged_enum_echo_test() ->
    ?assertEqual(foo, tagged_enum_echo(foo)),
    ?assertEqual({bar, <<"string">>}, tagged_enum_echo({bar, <<"string">>})),
    ?assertEqual({baz,#{a => 1, b => 2}}, tagged_enum_echo({baz,#{a => 1, b => 2}})).

untagged_enum_echo_test() ->
    ?assertEqual(123, untagged_enum_echo(123)),
    ?assertEqual(<<"string">>, untagged_enum_echo(<<"string">>)).

-endif.