| // 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 Stream<ProgressEvent> get onLoadStart |
| /// Stream of loadstart events handled by this HttpRequestEventTarget. |
| /// @description Checks that only single event is fired. |
| /// @Issue https://github.com/dart-lang/co19/issues/932 |
| |
| import "dart:html"; |
| 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(); |
| } |