LibTest/collection/UnmodifiableListView/indexOf_A01_t01.test.dart

// 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.

// @dart = 2.9

/// @assertion int indexOf(E element, [int start = 0])
/// Returns the first index of [element] in the list.
/// @description Checks that if [start] is not specified, searches the entire
/// list from the very beginning.
/// @author iarkh@unipro.ru

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

main() {
  UnmodifiableListView a = new UnmodifiableListView(
      [42, 0, -1, 42, -1, 6031769, 0]);
  Expect.equals(0, a.indexOf(42));
  Expect.equals(1, a.indexOf(0));
  Expect.equals(2, a.indexOf(-1));
  Expect.equals(5, a.indexOf(6031769));
}