LibTest/html/Element/onDragStart_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.
 */
/**
 * @assertion ElementStream<MouseEvent> get onDragStart
 * A stream of dragstart events fired when this element starts being dragged.
 * @description Checks that correct events are delivered via the stream
 */
import "dart:html";
import "../../../Utils/expect.dart";

main() {
  var type = 'dragstart';
  var x = document.body;
  if (x != null) {
    asyncStart();
    x.onDragStart.listen((e) {
      Expect.equals(type, e.type);
      asyncEnd();
    });

    var event = new MouseEvent(type);
    x.dispatchEvent(event);
  } else {
    Expect.fail("Body is null");
  }
}