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// 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);
}