anchor.diff:  -export([check_raw_status/1]).
   -export([check_status/1]).
   -export([chunked_response/1]).
  +-export([echo_body/1]).
   -export([error_chain_handle_after_reply/1]).
   -export([error_chain_handle_before_reply/1]).
   -export([error_handle_after_reply/1]).
  
positive.code: 		check_raw_status,
  		check_status,
  		chunked_response,
  		error_chain_handle_after_reply,
  		error_chain_handle_before_reply,
  		error_handle_after_reply,
  
negative.code: 	{ok, {{"HTTP/1.1", 200, "OK"}, _, "chunked_handler\r\nworks fine!"}}
  		= httpc:request(binary_to_list(build_url("/chunked_response", Config))).
  
  %% Check if sending requests whose size is around the MTU breaks something.
  echo_body(Config) ->
  	Client = ?config(client, Config),
  	{ok, [{mtu, MTU}]} = inet:ifget("lo", [mtu]),
  	[begin
  		Body = list_to_binary(lists:duplicate(Size, $a)),
  		{ok, Client2} = cowboy_client:request(<<"POST">>,
  			build_url("/echo/body", Config),
  			[{<<"connection">>, <<"close">>}],
  			Body, Client),
  		{ok, 200, _, Client3} = cowboy_client:response(Client2),
  		{ok, Body, _} = cowboy_client:response_body(Client3)
  	end || Size <- lists:seq(MTU - 500, MTU)].
  
  error_chain_handle_after_reply(Config) ->
  	Client = ?config(client, Config),
  	{ok, Client2} = cowboy_client:request(<<"GET">>,
  