LibTest/collection/LinkedListEntry/list_A01_t03.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 LinkedList<E> list
/// Get the linked list containing this element.
/// Returns [null] if this entry is not currently in any list.
/// @description Checks that null is returned if this entry is not currently in
/// any list and correct list otherwise
/// @author sgrekhov@unipro.ru

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

main() {
  MyLinkedListEntry<int> entry = new MyLinkedListEntry<int>(1);
  Expect.isNull(entry.list);

  LinkedList<MyLinkedListEntry> list = new LinkedList<MyLinkedListEntry<int>>();
  list.add(entry);
  Expect.identical(list, entry.list);
  list.remove(entry);

  LinkedList<MyLinkedListEntry> list2 = new LinkedList<MyLinkedListEntry<int>>();
  list2.add(entry);
  Expect.identical(list2, entry.list);
}