// Copyright (c) 2018, 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

/// @assertion HttpHeaders headers
/// Returns the client response headers.
/// The client response headers are immutable.
/// @description Checks that the client response headers are immutable.
/// @author sgrekhov@unipro.ru

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

var localhost = InternetAddress.loopbackIPv4.address;

test(String method) async {
  asyncStart();
  HttpServer server = await HttpServer.bind(localhost, 0);
  server.listen((HttpRequest request) {
    request.response.close();
    server.close();
  });

  HttpClient client = new HttpClient();
  client.open(method, localhost, server.port, "")
      .then((HttpClientRequest request) {
    return request.close();
  }).then((HttpClientResponse response) {
    Expect.equals("text/plain; charset=utf-8",
        response.headers.value("content-type"));
    Expect.throws(() {
      response.headers.add(HttpHeaders.ageHeader, 21);
    });
    Expect.throws(() {
      response.headers.set(HttpHeaders.ageHeader, 22);
    });
    asyncEnd();
  });
}

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