| // 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 abstract E operator [](int index) |
| /// @description Checks that [ArgumentError] is thrown if [index] is [:null:]. |
| /// @author iarkh@unipro.ru |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(List a0) { |
| UnmodifiableListView a = new UnmodifiableListView(a0); |
| Expect.throws(() { a[null]; }, (e) => e is ArgumentError); |
| } |
| |
| main() { |
| check([]); |
| check([1, 2, 3, 4, 5]); |
| check(["1", "2", "3", "4", "5"]); |
| } |
