anchor.diff:  
   init_per_testcase(Testcase, Config0) ->
     TestConfig = ?MODULE:Testcase({init, Config0}),
  -  lists:foldl( fun({Key, _} = New, Config) ->
  -                 lists:keystore(Key, 1, Config, New)
  -               end
  -             , Config0
  -             , TestConfig
  -            ).
  +  Config1 = lists:foldl( fun({Key, _} = New, Config) ->
  +                           lists:keystore(Key, 1, Config, New)
  +                         end
  +                       , Config0 ++ defaults()
  +                       , TestConfig
  +                       ),
  +  Blueprint = proplists:get_value(blueprint, Config1),
  +  {ok, File} = file:open(Blueprint, [write]),
  +  Config = [{file, File} | Config1],
  +  update_blueprint(Config).
   
   end_per_testcase(_Testcase, _Config) ->
     ok.
  
positive.code:   lhttpc:start(),
    application:stop(unrest),
    Path = filename:join([code:priv_dir(unrest), "webmachine.yml"]),
    Blueprint = filename:join([ code:priv_dir(unrest)
                              , ".."
                              , "test"
                              , "webmachine.apib"
                              ]),
    unrest:start(Path),
    [{blueprint, Blueprint} | Config].
  
  
negative.code: %%_* Tests =====================================================================
  
  test({init, _Config}) ->
    [ {request_headers, [{"Content-Length", "0"}]}
    , {response_code, "204"}
    ];
  test(Config) ->
    run(Config).
  
  