| // Copyright (c) 2013, 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. |
| |
| import 'package:expect/expect.dart'; |
| import 'package:async_helper/async_helper.dart'; |
| import 'dart:async'; |
| |
| main() { |
| Completer done = new Completer(); |
| List events = []; |
| |
| bool shouldForward = true; |
| Expect.identical(Zone.root, Zone.current); |
| Zone forked = Zone.current.fork(specification: new ZoneSpecification(runUnary: |
| <R, T>(Zone self, ZoneDelegate parent, Zone origin, R f(T arg), T arg) { |
| // The zone is still the same as when origin.run was invoked, which |
| // is the root zone. (The origin zone hasn't been set yet). |
| Expect.identical(Zone.current, Zone.root); |
| events.add("forked.run1"); |
| if (shouldForward) |
| return parent.runUnary<R, T>(origin, f, ((arg as int) + 1) as T); |
| return 42 as R; |
| })); |
| |
| events.add("zone forked"); |
| Zone expectedZone = forked; |
| var result = forked.runUnary((arg) { |
| Expect.identical(expectedZone, Zone.current); |
| events.add("run closure"); |
| return arg + 3; |
| }, 495); |
| Expect.equals(499, result); |
| events.add("executed run"); |
| |
| shouldForward = false; |
| result = forked.runUnary<int, int>((arg) { |
| Expect.fail("should not be invoked"); |
| }, 99); |
| Expect.equals(42, result); |
| events.add("executed run2"); |
| |
| asyncStart(); |
| shouldForward = true; |
| result = forked.runUnary((arg) { |
| Expect.identical(forked, Zone.current); |
| events.add("run closure 2"); |
| scheduleMicrotask(() { |
| events.add("run closure 3"); |
| Expect.identical(forked, Zone.current); |
| done.complete(true); |
| }); |
| return -arg - 8; |
| }, 490); |
| events.add("after nested scheduleMicrotask"); |
| Expect.equals(-499, result); |
| |
| done.future.whenComplete(() { |
| Expect.listEquals([ |
| "zone forked", |
| "forked.run1", |
| "run closure", |
| "executed run", |
| "forked.run1", |
| "executed run2", |
| "forked.run1", |
| "run closure 2", |
| "after nested scheduleMicrotask", |
| "run closure 3" |
| ], events); |
| asyncEnd(); |
| }); |
| } |