| // Copyright (c) 2011, 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 Future<T> elementAt(int index) |
| /// If a done event occurs before the value is found, the future completes with a RangeError. |
| /// @description Checks that if a done event occurs before the value is found, |
| /// the future completes with a RangeError. |
| /// @author kaigorodov |
| |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| void checkError(Stream s, index) { |
| asyncStart(); |
| s.elementAt(index).then((actual) { |
| Expect.fail("unexpected onValue call"); |
| }, onError: (error) { |
| Expect.isTrue(error is RangeError, "error is ${error.runtimeType}"); |
| asyncEnd(); |
| }); |
| } |
| |
| main() { |
| checkError(IsolateStream.fromIterable([]), 1); |
| for (int k = 1; k < 10; k++) { |
| Iterable it = new Iterable.generate(k - 1, (int index) => index); |
| checkError(IsolateStream.fromIterable(it), k); |
| } |
| } |