add some tests for Host header parser

test/http_SUITE_data/http_req_attr.erl

@@ -0,0 +1,19 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(http_req_attr).
+-behaviour(cowboy_http_handler).
+-export([init/3, handle/2, terminate/3]).
+
+init({_, http}, Req, _) ->
+	{Attr, Req2} = cowboy_req:qs_val(<<"attr">>, Req),
+	{ok, Req2, Attr}.
+
+handle(Req, <<"host_and_port">> = Attr) ->
+	{Host, Req2} = cowboy_req:host(Req),
+	{Port, Req3} = cowboy_req:port(Req2),
+	Value = [Host, "\n", integer_to_list(Port)],
+	{ok, Req4} = cowboy_req:reply(200, [], Value, Req3),
+	{ok, Req4, Attr}.
+
+terminate(_, _, _) ->
+	ok.