gistfile1.hrl

-module(utils).
-compile(export_all).

-ifdef(EUNIT).
-include_lib("eunit/include/eunit.hrl").
-endif.

double(X) -> 
  X * 2.

triple(X) ->
  X * 3.

% Tests

-ifdef(EUNIT).

double_test_() -> 
  {inparallel,
    [
      ?_assertEqual( 100, utils:double(50)),
      ?_assertEqual( 50, utils:double(20))
    ]
  }.

triple_test_() -> 
  {inparallel,
    [
      ?_assertEqual( 9, utils:triple(3)),
      ?_assertEqual( 75, utils:triple(25))
    ]
  }.

-endif.