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

-ifdef(gen_tcp_r15b_workaround).
-define(SHOULD_HAVE_BUG, true).
-else.
-define(SHOULD_HAVE_BUG, false).
-endif.

has_acceptor_bug_test_() ->
    {setup,
     fun start_server/0,
     fun mochiweb_http:stop/1,
     fun has_acceptor_bug_tests/1}.

start_server() ->
    application:start(inets),
    {ok, Pid} = mochiweb_http:start_link([{port, 0},
                                          {loop, fun responder/1}]),
    Pid.

has_acceptor_bug_tests(Server) ->
    Port = mochiweb_socket_server:get(Server, port),
    [{"1000 should be fine even with the bug",
      ?_assertEqual(false, has_bug(Port, 1000))},
     {"10000 should trigger the bug if present",
      ?_assertEqual(?SHOULD_HAVE_BUG, has_bug(Port, 10000))}].

responder(Req) ->
    Req:respond({200,
                 [{"Content-Type", "text/html"}],
                 ["<html><body>Hello</body></html>"]}).

has_bug(Port, Len) ->
  case
    httpc:request(get, {"http://127.0.0.1:" ++ integer_to_list(Port) ++ "/",
                        [{"X-Random", lists:duplicate(Len, $a)}]}, [], [])
  of
      {error, socket_closed_remotely} ->
          true;
      {ok, {{"HTTP/1.1", 200, "OK"}, _, "<html><body>Hello</body></html>"}} ->
          false;
      {ok, {{"HTTP/1.1", 400, "Bad Request"}, _, []}} ->
          false
  end.