| // Copyright (c) 2014, 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. |
| |
| // @dart = 2.9 |
| |
| library start_paused_test; |
| |
| import "dart:isolate"; |
| import "package:expect/expect.dart"; |
| import "package:async_helper/async_helper.dart"; |
| |
| void isomain(SendPort p) { |
| p.send("DONE"); |
| } |
| |
| void notyet(_) { |
| throw "NOT YET"; |
| } |
| |
| void main() { |
| asyncStart(); |
| test1(); |
| test2(); |
| asyncEnd(); |
| } |
| |
| void test1() { |
| // Test that a paused isolate doesn't send events. |
| // We start two isolates, one paused and one not. |
| // The unpaused one must send an event, after which |
| // we resume that paused isolate, and expect the second event. |
| // This is not a guaranteed test, since it can succeede even if the |
| // paused isolate isn't really paused. |
| // However, it must never fail, since that would mean that a paused |
| // isolate sends a message. |
| asyncStart(); |
| RawReceivePort p1 = new RawReceivePort(notyet); |
| Isolate.spawn(isomain, p1.sendPort, paused: true).then((isolate) { |
| RawReceivePort p2; |
| p2 = new RawReceivePort((x) { |
| Expect.equals("DONE", x); |
| p2.close(); |
| p1.handler = (x) { |
| Expect.equals("DONE", x); |
| p1.close(); |
| asyncEnd(); |
| }; |
| isolate.resume(isolate.pauseCapability); |
| }); |
| Isolate.spawn(isomain, p2.sendPort); |
| }); |
| } |
| |
| void test2() { |
| // Test that a paused isolate doesn't send events. |
| // Like the test above, except that we change the pause capability |
| // of the paused isolate by pausing it using another capability and |
| // then resuming the initial pause. This must not cause it to send |
| // a message before the second pause is resumed as well. |
| asyncStart(); |
| RawReceivePort p1 = new RawReceivePort(notyet); |
| Isolate.spawn(isomain, p1.sendPort, paused: true).then((isolate) { |
| RawReceivePort p2; |
| Capability c2 = new Capability(); |
| // Switch to another pause capability. |
| isolate.pause(c2); |
| isolate.resume(isolate.pauseCapability); |
| p2 = new RawReceivePort((x) { |
| Expect.equals("DONE", x); |
| p2.close(); |
| p1.handler = (x) { |
| Expect.equals("DONE", x); |
| p1.close(); |
| asyncEnd(); |
| }; |
| isolate.resume(c2); |
| }); |
| Isolate.spawn(isomain, p2.sendPort); |
| }); |
| } |