LibTest/html/HttpRequestUpload/onLoadStart_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 Stream<ProgressEvent> get onLoadStart
 * Stream of loadstart events handled by this HttpRequestEventTarget.
 * @description Checks that only single event is fired.
 */
import "dart:html";
import "../../../Utils/async_utils.dart";
import "../../../UtilsHtml/expect.dart";

main() {
  HttpRequest request = new HttpRequest();
  HttpRequestUpload upload=request.upload;
  bool first=true;
  request.open('GET', "test.dart");
  asyncStart();
  upload.onLoadStart.listen((event){
      Expect.isTrue(first);
      first=false;
      asyncEnd();
    });
  request.send();
}