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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 import 'package:expect/expect.dart'; | 5 import 'package:expect/expect.dart'; |
6 import 'package:async_helper/async_helper.dart'; | 6 import 'package:async_helper/async_helper.dart'; |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 | 8 |
9 main() { | 9 main() { |
10 Completer done = new Completer(); | 10 Completer done = new Completer(); |
11 | 11 |
12 var valueToCapture; | 12 var valueToCapture; |
13 var restoredValue; | 13 var restoredValue; |
14 | 14 |
15 Expect.identical(Zone.ROOT, Zone.current); | 15 Expect.identical(Zone.ROOT, Zone.current); |
16 Zone forked = Zone.current.fork(specification: new ZoneSpecification( | 16 Zone forked = Zone.current.fork(specification: new ZoneSpecification( |
17 registerUnaryCallback: | 17 registerUnaryCallback: |
18 <R>(Zone self, ZoneDelegate parent, Zone origin, R f(arg)) { | 18 (Zone self, ZoneDelegate parent, Zone origin, f(arg)) { |
19 // The zone is still the same as when origin.run was invoked, which | 19 // The zone is still the same as when origin.run was invoked, which |
20 // is the root zone. (The origin zone hasn't been set yet). | 20 // is the root zone. (The origin zone hasn't been set yet). |
21 Expect.identical(Zone.current, Zone.ROOT); | 21 Expect.identical(Zone.current, Zone.ROOT); |
22 // Note that not forwarding is completely legal, though not encouraged. | 22 // Note that not forwarding is completely legal, though not encouraged. |
23 var capturedValue = valueToCapture; | 23 var capturedValue = valueToCapture; |
24 return parent.registerUnaryCallback(origin, (arg) { | 24 return parent.registerUnaryCallback(origin, (arg) { |
25 restoredValue = capturedValue; | 25 restoredValue = capturedValue; |
26 return f(arg); | 26 return f(arg); |
27 }); | 27 }); |
28 })); | 28 })); |
29 | 29 |
30 valueToCapture = 499; | 30 valueToCapture = 499; |
31 var fun = (x) => x + 99; | 31 var fun = (x) => x + 99; |
32 var registered = forked.registerUnaryCallback(fun); | 32 var registered = forked.registerUnaryCallback(fun); |
33 Expect.isFalse(identical(fun, registered)); | 33 Expect.isFalse(identical(fun, registered)); |
34 | 34 |
35 // It is valid to invoke the callback in a different zone. This is, of course, | 35 // It is valid to invoke the callback in a different zone. This is, of course, |
36 // extremely discouraged. | 36 // extremely discouraged. |
37 var result = registered(399); | 37 var result = registered(399); |
38 Expect.equals(498, result); | 38 Expect.equals(498, result); |
39 Expect.equals(499, restoredValue); | 39 Expect.equals(499, restoredValue); |
40 } | 40 } |
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