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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
64 lines
1.4 KiB
Dart
64 lines
1.4 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.9
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library queue.iterator.test;
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import "package:expect/expect.dart";
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import 'dart:collection' show Queue;
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class QueueIteratorTest {
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static testMain() {
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testSmallQueue();
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testLargeQueue();
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testEmptyQueue();
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}
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static int sum(int expected, Iterator<int> it) {
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int count = 0;
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while (it.moveNext()) {
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count += it.current;
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}
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Expect.equals(expected, count);
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}
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static void testSmallQueue() {
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Queue<int> queue = new Queue<int>();
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queue.addLast(1);
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queue.addLast(2);
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queue.addLast(3);
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Iterator<int> it = queue.iterator;
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sum(6, it);
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Expect.isFalse(it.moveNext());
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Expect.isNull(it.current);
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}
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static void testLargeQueue() {
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Queue<int> queue = new Queue<int>();
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int count = 0;
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for (int i = 0; i < 100; i++) {
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count += i;
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queue.addLast(i);
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}
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Iterator<int> it = queue.iterator;
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sum(count, it);
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Expect.isFalse(it.moveNext());
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Expect.isNull(it.current);
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}
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static void testEmptyQueue() {
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Queue<int> queue = new Queue<int>();
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Iterator<int> it = queue.iterator;
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sum(0, it);
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Expect.isFalse(it.moveNext());
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Expect.isNull(it.current);
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}
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}
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main() {
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QueueIteratorTest.testMain();
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}
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