LibTest/collection/DoubleLinkedQueue/forEach_A01_t03.dart

// Copyright (c) 2011, 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.

/// @assertion void forEach(void f(E element))
/// Applies the function [f] to each element of this collection.
/// @description Checks that exception thrown in [f] breaks the iteration.
/// @author kaigorodov

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

main() {
  DoubleLinkedQueue queue = new DoubleLinkedQueue();
  
  queue.addLast(1);
  queue.addLast(2);
  
  int count = 0;
  try {
    queue.forEach((var element) {
      throw ++count;
    });
  } on Object catch(e) {
    Expect.equals(1, count);
  }
}