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b81f12a549
Change-Id: I0fa2ee2561dd0bc399d88868d790d56e6df3c94d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134940 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
29 lines
767 B
Dart
29 lines
767 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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expectList(actualStream, expectedList) {
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return actualStream.toList().then((v) {
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Expect.listEquals(expectedList, v);
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});
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}
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Stream<int> makeStream(int n) async* {
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for (int i = 0; i < n; i++) yield i;
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}
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main() {
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fivePartialSums(Stream<int> s) async* {
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var r = 0;
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await for (var v in s.take(5)) yield r += v;
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}
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asyncStart();
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expectList(fivePartialSums(makeStream(10)), [0, 1, 3, 6, 10])
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.then(asyncSuccess);
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}
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