// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertionHttpHeaders headers
/// Returns the client request headers.
///
/// The client request headers can be modified until the client request body is
/// written to or closed. After that they become immutable.
/// @description Checks that the client request headers become immutable after
/// the client request body is written to
/// @author sgrekhov@unipro.ru

import "dart:io";
import "dart:convert";
import "../../../Utils/expect.dart";

var localhost = InternetAddress.loopbackIPv4.address;

test(String method) async {
  asyncStart();
  String helloWorld = "Hello test world!";
  HttpServer server = await HttpServer.bind(localhost, 0);
  server.listen((HttpRequest request) {
    Expect.isNull(request.headers.value(HttpHeaders.ageHeader));
    request.response.write(helloWorld);
    request.response.close();
    server.close();
  });

  HttpClient client = new HttpClient();
  client.open(method, localhost, server.port, "")
      .then((HttpClientRequest request) {
        String body = "Lily was here";
        request.headers.contentLength = body.length;
        request.write(body);
        Expect.throws(() {request.headers.set(HttpHeaders.ageHeader, 21);});
        return request.close();
  }).then((HttpClientResponse response) {
    response.cast<List<int>>().transform(utf8.decoder).listen((content) {});
    asyncEnd();
  });
}

main() {
  test("get");
  test("head");
  test("delete");
  test("put");
  test("post");
  test("patch");
}