| // 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/scheduler.dart'; |
| import 'package:flutter/services.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| test('attachRootWidget will schedule a frame', () async { |
| final WidgetsFlutterBinding binding = WidgetsFlutterBinding.ensureInitialized() as WidgetsFlutterBinding; |
| expect(SchedulerBinding.instance!.hasScheduledFrame, isFalse); |
| // Framework starts with detached statue. Sends resumed signal to enable frame. |
| final ByteData message = const StringCodec().encodeMessage('AppLifecycleState.resumed')!; |
| await ServicesBinding.instance!.defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { }); |
| |
| binding.attachRootWidget(const Placeholder()); |
| expect(SchedulerBinding.instance!.hasScheduledFrame, isTrue); |
| }); |
| } |