blob: 37e22b9400f3139d83ff071d9415f9099ece1aef [file] [log] [blame]
// Copyright (c) 2011, 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 expand(Iterable f(E element))
/// Expands each element of this [Iterable] into zero or more elements.
/// The resulting [Iterable] runs through the elements returned by [f] for each
/// element of this, in order.
/// @description Checks that the method expands each element of this Iterable
/// into zero or more elements.
/// @author kaigorodov
import "../../../Utils/expect.dart";
import "dart:collection";
main() {
DoubleLinkedQueue queue = new DoubleLinkedQueue();
for (int k = 0; k < 10; k++) {
Expect.equals(0, queue.expand((element) => []).length);
Expect.equals(k, queue.expand((element) => [element]).length);
Expect.equals(2 * k, queue.expand((element) => [element, element]).length);