1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
// 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() {
final TestRenderBinding binding = TestRenderBinding();
test('Flutter dispatches first frame event on the web only', () async {
final Completer<void> completer = Completer<void>();
const MethodChannel firstFrameChannel = MethodChannel('flutter/service_worker');
binding.defaultBinaryMessenger.setMockMethodCallHandler(firstFrameChannel, (MethodCall methodCall) async {
completer.complete();
return null;
});
binding.handleBeginFrame(Duration.zero);
binding.handleDrawFrame();
await expectLater(completer.future, completes);
}, skip: !kIsWeb); // [intended] the test is only makes sense on the web.
}
class TestRenderBinding extends BindingBase
with SchedulerBinding,
ServicesBinding,
GestureBinding,
SemanticsBinding,
RendererBinding,
TestDefaultBinaryMessengerBinding { }