mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 09:01:42 +00:00
e7a524e8c4
Change-Id: Ib235c213861f819ed11a887283cad085582eaac7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/132941 Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Mark Zhou <markzipan@google.com>
103 lines
3.3 KiB
Dart
103 lines
3.3 KiB
Dart
// Copyright (c) 2012, 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.
|
|
|
|
import "package:expect/expect.dart";
|
|
|
|
main() {
|
|
List<int> list1 = <int>[1, 2, 3];
|
|
List<int> list2 = const <int>[4, 5];
|
|
List<String> list3 = <String>[];
|
|
Set<int> set1 = new Set<int>();
|
|
set1..add(11)..add(12)..add(13);
|
|
Set set2 = new Set();
|
|
|
|
Iterable<int> takeWhileFalse = list1.takeWhile((x) => false);
|
|
Iterator<int> it = takeWhileFalse.iterator;
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
Iterable<int> takeWhileOdd = list1.takeWhile((x) => x.isOdd);
|
|
it = takeWhileOdd.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(1, it.current);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
Iterable<int> takeWhileLessThan3 = list1.takeWhile((x) => x < 3);
|
|
it = takeWhileLessThan3.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(1, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(2, it.current);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
Iterable<int> takeEverything = list1.takeWhile((x) => true);
|
|
it = takeEverything.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(1, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(2, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(3, it.current);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
Iterable<int> takeWhileEven = list1.takeWhile((x) => x.isEven);
|
|
it = takeWhileFalse.iterator;
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
takeWhileFalse = list2.takeWhile((x) => false);
|
|
it = takeWhileFalse.iterator;
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
takeWhileEven = list2.takeWhile((x) => x.isEven);
|
|
it = takeWhileEven.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(4, it.current);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
takeEverything = list2.takeWhile((x) => true);
|
|
it = takeEverything.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(4, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(5, it.current);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
Iterable<String> takeWhileFalse2 = list3.takeWhile((x) => false);
|
|
Iterator<String> it2 = takeWhileFalse2.iterator;
|
|
Expect.isFalse(it2.moveNext());
|
|
|
|
Iterable<String> takeEverything2 = list3.takeWhile((x) => true);
|
|
it2 = takeEverything2.iterator;
|
|
Expect.isFalse(it2.moveNext());
|
|
|
|
takeWhileFalse = set1.takeWhile((x) => false);
|
|
it = takeWhileFalse.iterator;
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
takeEverything = set1.takeWhile((x) => true);
|
|
List<int> copied = takeEverything.toList();
|
|
Expect.equals(3, copied.length);
|
|
Expect.isTrue(set1.contains(copied[0]));
|
|
Expect.isTrue(set1.contains(copied[1]));
|
|
Expect.isTrue(set1.contains(copied[1]));
|
|
Expect.isTrue(copied[0] != copied[1]);
|
|
Expect.isTrue(copied[0] != copied[2]);
|
|
Expect.isTrue(copied[1] != copied[2]);
|
|
it = takeEverything.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.isTrue(it.current != null);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.isTrue(it.current != null);
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.isTrue(it.current != null);
|
|
Expect.isFalse(it.moveNext());
|
|
|
|
var dynamicTakeWhileFalse = set2.takeWhile((x) => false);
|
|
var dynamicIt = dynamicTakeWhileFalse.iterator;
|
|
Expect.isFalse(dynamicIt.moveNext());
|
|
|
|
var dynamicTakeEverything = set2.takeWhile((x) => true);
|
|
dynamicIt = dynamicTakeEverything.iterator;
|
|
Expect.isFalse(dynamicIt.moveNext());
|
|
}
|