Migrated test block 17 to Dart 2.0.

tests/corelib/queue_iterator_test.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.
-
-library queue.iterator.test;
-
-import "package:expect/expect.dart";
-import 'dart:collection' show Queue;
-
-class QueueIteratorTest {
-  static testMain() {
-    testSmallQueue();
-    testLargeQueue();
-    testEmptyQueue();
-  }
-
-  static int sum(int expected, Iterator<int> it) {
-    int count = 0;
-    while (it.moveNext()) {
-      count += it.current;
-    }
-    Expect.equals(expected, count);
-  }
-
-  static void testSmallQueue() {
-    Queue<int> queue = new Queue<int>();
-    queue.addLast(1);
-    queue.addLast(2);
-    queue.addLast(3);
-
-    Iterator<int> it = queue.iterator;
-    sum(6, it);
-    Expect.isFalse(it.moveNext());
-    Expect.isNull(it.current);
-  }
-
-  static void testLargeQueue() {
-    Queue<int> queue = new Queue<int>();
-    int count = 0;
-    for (int i = 0; i < 100; i++) {
-      count += i;
-      queue.addLast(i);
-    }
-    Iterator<int> it = queue.iterator;
-    sum(count, it);
-    Expect.isFalse(it.moveNext());
-    Expect.isNull(it.current);
-  }
-
-  static void testEmptyQueue() {
-    Queue<int> queue = new Queue<int>();
-    Iterator<int> it = queue.iterator;
-    sum(0, it);
-    Expect.isFalse(it.moveNext());
-    Expect.isNull(it.current);
-  }
-}
-
-main() {
-  QueueIteratorTest.testMain();
-}