dart-sdk/tests/lib/html/message_channel_test.dart
Srujan Gaddam a925f4770f [dart:html] Remove 2.7 annotation from lib/html
Strips out the temporary annotation so all the tests without
NNBD related changes can run in strong mode.

Change-Id: I88f18916f0c5a45a80eddb73941db19984f0bfcf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/140652
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
2020-04-06 20:41:14 +00:00

38 lines
964 B
Dart

// Copyright (c) 2013, 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.
import 'dart:async';
import 'dart:html';
import 'package:expect/minitest.dart';
main() async {
var gotOnMessage = false;
var gotEventListener = false;
Completer completer = new Completer();
var channel = new MessageChannel();
channel.port1.postMessage("Tickle me.");
channel.port2.onMessage.listen((MessageEvent e) {
expect(e.data, "Tickle me.");
gotOnMessage = true;
});
channel.port2.addEventListener("message", (message) {
var msg = message as MessageEvent;
expect(msg.data, "Tickle me.");
gotEventListener = true;
completer.complete();
});
// Wait for the event listener.
await completer.future;
// Make sure both fired.
expect(gotOnMessage, true);
expect(gotEventListener, true);
}