LibTest/html/Window/postMessage_A01_t02.dart

// Copyright (c) 2014, 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

/// @assertion void postMessage(message, String targetOrigin, [List messagePorts])
/// Sends a cross-origin message.
/// @description Checks that the message can be sent to a new window.

import "dart:html";
import "../../../UtilsHtml/expect.dart";

const text = "Hi there!";

main() {
  WindowBase nw = window.open("about:blank", "_blank");
  Expect.isTrue(nw is WindowBase);
  asyncStart();
  nw.addEventListener("message", (Event event) {
    print("ev=$event");
    Expect.equals(text, (event as MessageEvent).data);
    nw.close();
    asyncEnd();
  });

  nw.postMessage(text, "*");
}