| // 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. |
| |
| // TODO(yjbanov): enable Web when https://github.com/flutter/engine/pull/12747 rolls into the framework. |
| @TestOn('!chrome') |
| |
| import 'dart:convert'; |
| import 'dart:typed_data'; |
| import 'dart:ui' as ui; |
| import 'package:flutter/foundation.dart'; |
| import 'package:flutter/services.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| class TestChannelBuffersFlutterBinding extends BindingBase with ServicesBinding { |
| } |
| |
| void main() { |
| ByteData _makeByteData(String str) { |
| final List<int> list = utf8.encode(str); |
| final ByteBuffer buffer = list is Uint8List ? list.buffer : Uint8List.fromList(list).buffer; |
| return ByteData.view(buffer); |
| } |
| |
| String _getString(ByteData data) { |
| final ByteBuffer buffer = data.buffer; |
| final List<int> list = buffer.asUint8List(data.offsetInBytes, data.lengthInBytes); |
| return utf8.decode(list); |
| } |
| |
| test('does drain channel buffers', () async { |
| const String channel = 'foo'; |
| final TestChannelBuffersFlutterBinding binding = TestChannelBuffersFlutterBinding(); |
| expect(binding.defaultBinaryMessenger, isNotNull); |
| bool didCallCallback = false; |
| final ui.PlatformMessageResponseCallback callback = (ByteData responseData) { |
| didCallCallback = true; |
| }; |
| const String payload = 'bar'; |
| final ByteData data = _makeByteData(payload); |
| ui.channelBuffers.push(channel, data, callback); |
| bool didDrainData = false; |
| binding.defaultBinaryMessenger.setMessageHandler(channel, (ByteData message) async { |
| expect(_getString(message), payload); |
| didDrainData = true; |
| return null; |
| }); |
| // Flush the event queue. |
| await Future<void>((){}); |
| expect(didDrainData, isTrue); |
| expect(didCallCallback, isTrue); |
| }); |
| } |