LibTest/html/Element/mouseWheelEvent_A01_t01.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 const mouseWheelEvent
/// Static factory designed to expose mousewheel events to event handlers
/// that are not necessarily instances of Element.
/// @description Checks that correct events are delivered via the stream

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

main() {
  var type = 'mousewheel';
  var x = document.body;

  asyncStart();
  Element.mouseWheelEvent.forElement(x).listen((e) {
    Expect.equals(type, e.type);
    asyncEnd();
  });

  var event = new MouseEvent(type);
  x.dispatchEvent(event);
}