blob: 690493d46acdfb1cd765183ea373611269703824 [file] [log] [blame]
// 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);
});
}