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a2b556b937
Change-Id: Ia5c41dda6503e1fbb8cc6099835d07588425e2ba Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128310 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
25 lines
750 B
Dart
25 lines
750 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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main() {
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asyncStart();
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bool waitedForCancel = false;
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var controller = new StreamController(
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onCancel: () => new Future(() => waitedForCancel = true));
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var sub = controller.stream.take(1).listen((x) {
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Expect.fail("onData should not be called");
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});
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var cancelFuture = sub.cancel();
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Expect.isNotNull(cancelFuture);
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cancelFuture.then((_) {
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Expect.isTrue(waitedForCancel);
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asyncEnd();
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});
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}
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