| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file |
| |
| // @dart = 2.9 |
| |
| library JsInterop1Test; |
| |
| import 'package:async_helper/async_helper.dart'; |
| import 'dart:async'; |
| import 'dart:html'; |
| |
| injectSource(code) { |
| final script = new ScriptElement(); |
| script.type = 'text/javascript'; |
| script.innerHtml = code; |
| document.body.append(script); |
| } |
| |
| main() { |
| asyncTest(() async { |
| var subscription; |
| var completer = Completer<void>(); |
| subscription = window.onMessage.listen((e) { |
| if (!completer.isCompleted && e.data == 'hello') { |
| completer.complete(); |
| subscription.cancel(); |
| } |
| }); |
| injectSource("window.postMessage('hello', '*');"); |
| |
| await completer; |
| }); |
| } |