LibTest/collection/DoubleLinkedQueue/take_A01_t02.dart

// 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.

// @dart = 2.9

/// @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 iarkh@unipro.ru


import "dart:collection";
import "../../../Utils/expect.dart";

bool test(int value) {
  Expect.fail("test($value) called");
  return true;
}

main() {
  new DoubleLinkedQueue.from([]).take(3);
  new DoubleLinkedQueue.from([1]).take(0);
  new DoubleLinkedQueue.from([1, 3, 7, 4, 5, 6]).take(2);
}