| // 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.isNull(it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| Iterable<int> takeWhileOdd = list1.takeWhile((x) => x.isOdd); |
| it = takeWhileOdd.iterator; |
| Expect.isNull(it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(1, it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| Iterable<int> takeWhileLessThan3 = list1.takeWhile((x) => x < 3); |
| it = takeWhileLessThan3.iterator; |
| Expect.isNull(it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(1, it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(2, it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| Iterable<int> takeEverything = list1.takeWhile((x) => true); |
| it = takeEverything.iterator; |
| Expect.isNull(it.current); |
| 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()); |
| Expect.isNull(it.current); |
| |
| Iterable<int> takeWhileEven = list1.takeWhile((x) => x.isEven); |
| it = takeWhileFalse.iterator; |
| Expect.isNull(it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| takeWhileFalse = list2.takeWhile((x) => false); |
| it = takeWhileFalse.iterator; |
| Expect.isNull(it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| takeWhileEven = list2.takeWhile((x) => x.isEven); |
| it = takeWhileEven.iterator; |
| Expect.isNull(it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(4, it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| takeEverything = list2.takeWhile((x) => true); |
| it = takeEverything.iterator; |
| Expect.isNull(it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(4, it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(5, it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| Iterable<String> takeWhileFalse2 = list3.takeWhile((x) => false); |
| Iterator<String> it2 = takeWhileFalse2.iterator; |
| Expect.isNull(it2.current); |
| Expect.isFalse(it2.moveNext()); |
| Expect.isNull(it2.current); |
| |
| Iterable<String> takeEverything2 = list3.takeWhile((x) => true); |
| it2 = takeEverything2.iterator; |
| Expect.isNull(it2.current); |
| Expect.isFalse(it2.moveNext()); |
| Expect.isNull(it2.current); |
| |
| takeWhileFalse = set1.takeWhile((x) => false); |
| it = takeWhileFalse.iterator; |
| Expect.isNull(it.current); |
| Expect.isFalse(it.moveNext()); |
| Expect.isNull(it.current); |
| |
| 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.isNull(it.current); |
| 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()); |
| Expect.isNull(it.current); |
| |
| var dynamicTakeWhileFalse = set2.takeWhile((x) => false); |
| var dynamicIt = dynamicTakeWhileFalse.iterator; |
| Expect.isNull(dynamicIt.current); |
| Expect.isFalse(dynamicIt.moveNext()); |
| Expect.isNull(dynamicIt.current); |
| |
| var dynamicTakeEverything = set2.takeWhile((x) => true); |
| dynamicIt = dynamicTakeEverything.iterator; |
| Expect.isNull(dynamicIt.current); |
| Expect.isFalse(dynamicIt.moveNext()); |
| Expect.isNull(dynamicIt.current); |
| } |