blob: 41417adeb91c1cb27dee5f29aa7ace9c01473750 [file] [log] [blame]
// Copyright (c) 2016, 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.
/// @assertion bool isEmpty
/// @description Checks that [isEmpty] returns [true] if [Iterator] is empty or
/// [false] otherwise.
/// @author
import "../../../Utils/expect.dart";
import "dart:collection";
class NaturalIterator implements Iterator<int> {
int limit;
int _current = 0;
bool moveNext() {
if (_current < limit) {
return true;
} else {
return false;
int get current => _current;
class MyIterable extends Object with IterableMixin {
int _limit;
Iterator<int> get iterator {
return new NaturalIterator(_limit);
main() {
Expect.isTrue(new MyIterable(0).isEmpty);
Expect.isFalse(new MyIterable(10).isEmpty);