// 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

/// @assertion Map<String, String> parameters
/// Gets the map of parameters.
///
/// This map cannot be modified. Invoking any operation which would modify the
/// map will throw UnsupportedError.
/// @description Checks that this map cannot be modified
/// @author sgrekhov@unipro.ru

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

main() {
  HeaderValue hv = new HeaderValue("value", {"p1": "v1", "p2": "v2"});
  Expect.throws(() {hv.parameters["a"] = "b";}, (e) => e is UnsupportedError);
}