1// Copyright 2014 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5import 'dart:js_interop';
6
7import 'package:web/web.dart' as web;
8
9Future<void> main() async {
10 if (await testFetchResources()) {
11 print('--- TEST SUCCEEDED ---');
12 } else {
13 print('--- TEST FAILED ---');
14 }
15}
16
17// Attempt to load CanvasKit resources hosted on gstatic.
18Future<bool> testFetchResources() async {
19 const String engineVersion = String.fromEnvironment('TEST_FLUTTER_ENGINE_VERSION');
20 if (engineVersion.isEmpty) {
21 return false;
22 }
23 try {
24 final web.Response response = await web.window
25 .fetch(
26 'https://www.gstatic.com/flutter-canvaskit/$engineVersion/canvaskit.js'.toJS,
27 web.RequestInit(method: 'GET'),
28 )
29 .toDart;
30 if (!response.ok) {
31 return false;
32 }
33 } catch (err) {
34 print(err);
35 return false;
36 }
37 try {
38 final web.Response response = await web.window
39 .fetch(
40 'https://www.gstatic.com/flutter-canvaskit/$engineVersion/canvaskit.wasm'.toJS,
41 web.RequestInit(method: 'GET'),
42 )
43 .toDart;
44 if (!response.ok) {
45 return false;
46 }
47 } catch (err) {
48 print(err);
49 return false;
50 }
51 return true;
52}
53