| // Copyright (c) 2012, 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 |
| |
| import 'dart:html'; |
| |
| import 'package:expect/minitest.dart'; |
| |
| main() { |
| var isShadowRoot = predicate((x) => x is ShadowRoot, 'is a ShadowRoot'); |
| |
| test('ShadowRoot supported', () { |
| var isSupported = ShadowRoot.supported; |
| |
| // If it's supported, then it should work. Otherwise should fail. |
| if (isSupported) { |
| var div = new DivElement(); |
| var shadowRoot = div.createShadowRoot(); |
| expect(shadowRoot, isShadowRoot); |
| expect(div.shadowRoot, shadowRoot); |
| } else { |
| expect(() => new DivElement().createShadowRoot(), throws); |
| } |
| }); |
| } |