-module(notify_and_wait_protocol).
-behaviour(ranch_protocol).
-export([start_link/3]).
-export([init/4]).
start_link(_, _, Opts = #{pid := TestPid}) ->
Msg = maps:get(msg, Opts, connected),
TerminateMsg = maps:get(terminate_msg, Opts, stop),
Timeout = maps:get(timeout, Opts, infinity),
Pid = spawn_link(?MODULE, init, [Msg, TestPid, TerminateMsg, Timeout]),
{ok, Pid}.
init(Msg, Pid, TerminateMsg, Timeout) ->
Pid ! {self(), Msg},
receive TerminateMsg -> ok after Timeout -> ok end.