// 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  void forEach(void action(K key, V value))
/// Applies [f] to each key-value pair of the map.
/// @description Checks that all mappings are iterated exactly once.
/// @author iarkh@unipro.ru

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

main() {
  List keys = new List(2);
  keys[0] = 0;
  keys[1] = 0;
  List values = new List(2);
  void f(var i, Object value) {
    keys[i] += 1;
    values[i] = value;
  }

  UnmodifiableMapView view = new UnmodifiableMapView({0 : "3", 1 : "5"});
  view.forEach(f);
  
  Expect.isTrue(keys[0] == 1 && keys[1] == 1);
  Expect.isTrue(values[0] == "3" && values[1] == "5");
}