// 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 'dart:async'; import 'package:flutter/foundation.dart'; import 'package:flutter/gestures.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter/scheduler.dart'; import 'package:flutter/services.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { test('Flutter dispatches first frame event on the web only', () async { final Completer<void> completer = Completer<void>(); final TestRenderBinding binding = TestRenderBinding(); const MethodChannel firstFrameChannel = MethodChannel('flutter/service_worker'); firstFrameChannel.setMockMethodCallHandler((MethodCall methodCall) async { completer.complete(); }); binding.handleBeginFrame(Duration.zero); binding.handleDrawFrame(); await expectLater(completer.future, completes); }, skip: !kIsWeb); } class TestRenderBinding extends BindingBase with SchedulerBinding, ServicesBinding, GestureBinding, SemanticsBinding, RendererBinding {}