floitsch@google.com
35e2ed1e57
BUG= http://dartbug.com/11279 R=lrn@google.com Review URL: https://codereview.chromium.org//23875032 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@27802 260f80e4-7a28-3924-810f-c04153c831b5
40 lines
1.3 KiB
Dart
40 lines
1.3 KiB
Dart
// Copyright (c) 2013, 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 'package:expect/expect.dart';
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import 'package:async_helper/async_helper.dart';
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import 'dart:async';
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main() {
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Completer done = new Completer();
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var valueToCapture;
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var restoredValue;
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Expect.identical(Zone.ROOT, Zone.current);
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Zone forked = Zone.current.fork(specification: new ZoneSpecification(
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registerCallback: (Zone self, ZoneDelegate parent, Zone origin, f()) {
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// The zone is still the same as when origin.run was invoked, which
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// is the root zone. (The origin zone hasn't been set yet).
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Expect.identical(Zone.current, Zone.ROOT);
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// Note that not forwarding is completely legal, though not encouraged.
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var capturedValue = valueToCapture;
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return parent.registerCallback(origin, () {
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restoredValue = capturedValue;
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return f();
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});
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}));
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valueToCapture = 499;
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var fun = () {
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Expect.identical(forked, Zone.current);
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return 99;
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};
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var registered = forked.bindCallback(fun, runGuarded: false);
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Expect.isFalse(identical(fun, registered));
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var result = registered();
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Expect.equals(99, result);
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Expect.equals(499, restoredValue);
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} |