blob: b9974ec66b9b7df541b6f4aed34e30d86d416a43 [file] [log] [blame]
// Copyright (c) 2017, 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 Iterable<E> take(int count)
/// Returns a lazy iterable of the [count] first elements of this iterable.
/// @description Checks that the filtering happens lazily, i.e. that [test]
/// method is not called when [take] is executed.
/// @author
import "dart:collection";
import "../../../Utils/expect.dart";
class MyIterable<int> extends Object with IterableMixin {
List _content;
MyIterable(List list): _content = list;
Iterator get iterator {
return _content.iterator;
bool test(int value) {"test($value) called");
return true;
main() {
new MyIterable([]).take(3);
new MyIterable([1]).take(0);
new MyIterable([1, 3, 7, 4, 5, 6]).take(2);