blob: fce7a0aaa53496a7131f06cb748bbb9f0471fc5c [file] [log] [blame]
* Copyright (c) 2016, 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 If m is marked async*, then:
* • It is a dynamic error if the class of o does not implement Stream.
* Otherwise
* • For each element x of o:
* – If the stream u associated with m has been paused, then execution
* of m is suspended until u is resumed or canceled.
* – If the stream u associated with m has been canceled, then let c be
* the finally clause of the innermost enclosing try-finally statement, if any.
* If c is defined, let h be the handler induced by c. If h is defined,
* control is transferred to h. If h is undefined, the immediately enclosing
* function terminates.
* – Otherwise, x is added to the stream associated with m in the order
* it appears in o. The function m may suspend.
* • If the stream o is done, execution of s is complete.
* @description Check that if the stream u associated with m has been
* canceled and there is an enclosing try finally statement, the finally
* clause is executed.
* @issue #25748
* @author
import 'dart:async';
import '../../../../Utils/expect.dart';
bool cancelHandled = false;
Stream<int> generator(Stream<int> input) async* {
bool cancelled;
try {
cancelled = true;
yield* input;
cancelled = false;
} finally {
if (cancelled) {
cancelHandled = true;
Future test() async {
List log = [];
StreamController<int> sc = new StreamController<int>();
Stream<int> s = generator(;
StreamSubscription<int> ss = s.listen(
(int i) {
await new Future.delayed(new Duration(milliseconds: 100));
await new Future.delayed(new Duration(milliseconds: 100));
Expect.listEquals([1,2,3], log);
await sc.close();
main() {
test().then((_) => asyncEnd());