| /* |
| * 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) |
| * Returns the value of the indexth data event of this stream. |
| * Stops listening to the stream after the indexth data event has been received. |
| * @description Checks that it stops listening to the stream after a value has |
| * been found. |
| * @author ilya |
| */ |
| library elementAt_A01_t03; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| const int INDEX = 10; |
| |
| void test(CreateStreamFunction create) { |
| int i = -1; |
| Stream<int> s = create(new Iterable<int>.generate(100, (int i) => i)); |
| s = s.map( |
| (int e) { |
| i++; |
| return e; |
| } |
| ); |
| asyncStart(); |
| s.elementAt(INDEX).then( |
| (int t) { |
| Expect.equals(INDEX, i); |
| asyncEnd(); |
| } |
| ); |
| } |