LibTest/collection/LinkedList/first_A01_t02.dart

// 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.

// @dart = 2.9

/// @assertion final E first
/// Returns the first element.
/// @description Checks that the first element of the list is returned.
/// @author kaigorodov

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

main() {
  MyLinkedListEntry head = new MyLinkedListEntry("head");
  LinkedList<MyLinkedListEntry> a = new LinkedList<MyLinkedListEntry>();
  Expect.equals(0, a.length);
  a.add(head);
  Expect.equals(head, a.first);

  a.add(new MyLinkedListEntry(1));
  Expect.equals(head, a.first);
}