| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:web/web.dart' as web; |
| |
| /// Whether the current browser is Firefox. |
| bool get isFirefox => web.window.navigator.userAgent.toLowerCase().contains('firefox'); |
| |
| /// Finds elements in the DOM tree rendered by the Flutter Web engine. |
| /// |
| /// If the browser supports shadow DOM, looks in the shadow root under the |
| /// `<flt-glass-pane>` element. Otherwise, looks under `<flt-glass-pane>` |
| /// without penetrating the shadow DOM. In the latter case, if the application |
| /// creates platform views, this will also find platform view elements. |
| web.NodeList findElements(String selector) { |
| final web.Element? flutterView = web.document.querySelector('flutter-view'); |
| |
| if (flutterView == null) { |
| fail( |
| 'Failed to locate <flutter-view>. Possible reasons:\n' |
| ' - The application failed to start' |
| ' - `findElements` was called before the application started' |
| ); |
| } |
| |
| return flutterView.querySelectorAll(selector); |
| } |