// 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/rendering.dart'; import 'package:flutter/scheduler.dart'; import 'package:flutter/widgets.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { WidgetsFlutterBinding.ensureInitialized(); test('handleMetricsChanged does not scheduleForcedFrame unless there is a child to the renderView', () async { expect(SchedulerBinding.instance.hasScheduledFrame, false); RendererBinding.instance.handleMetricsChanged(); expect(SchedulerBinding.instance.hasScheduledFrame, false); RendererBinding.instance.renderView.child = RenderLimitedBox(); RendererBinding.instance.handleMetricsChanged(); expect(SchedulerBinding.instance.hasScheduledFrame, true); }); }