Robert Nystrom
f6b0a70230
Change-Id: I59ae5b01c00f3bebda0ba74eb5eb1950ade59925 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137720 Reviewed-by: Erik Ernst <eernst@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
40 lines
910 B
Dart
40 lines
910 B
Dart
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "dart:async";
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import "package:expect/expect.dart";
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import "package:async_helper/async_helper.dart";
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sumStream(Stream<int> s) async {
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int accum = 0;
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await for (var v in s) {
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accum += v;
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}
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return accum;
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}
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test() async {
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var countStreamController;
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int i = 0;
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void tick() {
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if (i < 10) {
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countStreamController.add(i);
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i++;
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scheduleMicrotask(tick);
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} else {
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countStreamController.close();
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}
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}
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countStreamController = new StreamController<int>(onListen: () {
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scheduleMicrotask(tick);
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});
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Expect.equals(45, await sumStream(countStreamController.stream));
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}
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void main() {
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asyncStart();
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test().then((_) => asyncEnd());
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}
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