LibTest/collection/UnmodifiableListView/operator_subscripted_assignment_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 void operator []=(int index, E value)
/// This operation is not supported by an unmodifiable list.
/// @description Checks that operation is not supported.
/// @author iarkh@unipro.ru

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

main() {
  UnmodifiableListView l = new UnmodifiableListView([1, 2, 3, 4, 5]);
  Expect.throws(() { l[0] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[1] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[2] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[3] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[4] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[-1] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[7] = 1; }, (e) => e is UnsupportedError);
  Expect.throws(() { l[null] = 1; }, (e) => e is UnsupportedError);
}