-module(test_helper).
-export([test/0, run_and_remove/2, throw_elixir/1, throw_erlang/1]).
-define(TESTS, [
  atom_test,
  control_test,
  function_test,
  match_test,
  module_test,
  operators_test,
  string_test,
  tokenizer_test
]).

test() ->
  application:ensure_all_started(elixir),
  case eunit:test(?TESTS) of
    error -> erlang:halt(1);
    _Res  -> erlang:halt(0)
  end.

% Execute a piece of code and purge given modules right after
run_and_remove(Fun, Modules) ->
  try
    Fun()
  after
    [code:purge(Module)  || Module <- Modules],
    [code:delete(Module) || Module <- Modules]
  end.

% Throws an error with the Erlang Abstract Form from the Elixir string
throw_elixir(String) ->
  Forms = elixir:'string_to_quoted!'(String, 1, <<"nofile">>, []),
  {Expr, _, _} = elixir:quoted_to_erl(Forms, elixir:env_for_eval([])),
  erlang:error(io:format("~p~n", [Expr])).

% Throws an error with the Erlang Abstract Form from the Erlang string
throw_erlang(String) ->
  {ok, Tokens, _} = erl_scan:string(String),
  {ok, [Form]} = erl_parse:parse_exprs(Tokens),
  erlang:error(io:format("~p~n", [Form])).
