| // 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 'dart:convert'; |
| import 'dart:typed_data'; |
| |
| import 'package:flutter/services.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| TestWidgetsFlutterBinding.ensureInitialized(); |
| |
| 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); |
| } |
| |
| test('default binary messenger calls callback once', () async { |
| int countInbound = 0; |
| int countOutbound = 0; |
| const String channel = 'foo'; |
| final ByteData bar = makeByteData('bar'); |
| final Completer<void> done = Completer<void>(); |
| ServicesBinding.instance.channelBuffers.push( |
| channel, |
| bar, |
| (ByteData? message) async { |
| expect(message, isNull); |
| countOutbound += 1; |
| done.complete(); |
| }, |
| ); |
| expect(countInbound, equals(0)); |
| expect(countOutbound, equals(0)); |
| ServicesBinding.instance.defaultBinaryMessenger.setMessageHandler( |
| channel, |
| (ByteData? message) async { |
| expect(message, bar); |
| countInbound += 1; |
| return null; |
| }, |
| ); |
| expect(countInbound, equals(0)); |
| expect(countOutbound, equals(0)); |
| await done.future; |
| expect(countInbound, equals(1)); |
| expect(countOutbound, equals(1)); |
| }); |
| |
| test('can check the mock handler', () { |
| Future<ByteData?> handler(ByteData? call) => Future<ByteData?>.value(); |
| final TestDefaultBinaryMessenger messenger = TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger; |
| |
| expect(messenger.checkMockMessageHandler('test_channel', null), true); |
| expect(messenger.checkMockMessageHandler('test_channel', handler), false); |
| messenger.setMockMessageHandler('test_channel', handler); |
| expect(messenger.checkMockMessageHandler('test_channel', handler), true); |
| messenger.setMockMessageHandler('test_channel', null); |
| }); |
| } |