sdk/tests/isolate/src/CrossIsolateMessageTest.dart

// Copyright (c) 2011, 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 test program for testing that isolates can communicate to isolates
// other than the main isolate.

#library('CrossIsolateMessageTest');
#import('dart:isolate');
#import('TestFramework.dart');

class CrossIsolate1 extends Isolate {
  CrossIsolate1() : super.heavy();

  void main() {
    this.port.receive((msg, replyTo) {
      SendPort otherIsolate = msg;
      ReceivePort receivePort = new ReceivePort();
      receivePort.receive((msg, replyTo) {
        otherIsolate.send(msg + 58, null);  // 100.
        receivePort.close();
      });
      replyTo.send(['ready', receivePort.toSendPort()]);
      this.port.close();
    });
  }
}

// CrossIsolate2 is nearly the same as CrossIsolate1, but contains a
// different constant.
class CrossIsolate2 extends Isolate {
  CrossIsolate2() : super.heavy();

  void main() {
    this.port.receive((msg, replyTo) {
      SendPort mainIsolate = msg;
      ReceivePort receivePort = new ReceivePort();
      receivePort.receive((msg, replyTo) {
        mainIsolate.send(msg + 399, null); // 499.
        receivePort.close();
      });
      replyTo.send(['ready', receivePort.toSendPort()]);
      this.port.close();
    });
  }
}

test(TestExpectation expect) {
  // Create CrossIsolate1 and CrossIsolate2.
  expect.completes(new CrossIsolate1().spawn()).then((SendPort port1) {
    expect.completes(new CrossIsolate2().spawn()).then((SendPort port2) {
      // Create a new receive port and send it to isolate2.
      ReceivePort myPort = new ReceivePort();
      port2.call(myPort.toSendPort()).then(expect.runs1((msg) {
        Expect.equals("ready", msg[0]);
        // Send port of isolate2 to isolate1.
        port1.call(msg[1]).then(expect.runs1((msg) {
          Expect.equals("ready", msg[0]);
          myPort.receive(expect.runs2((msg, replyTo) {
            Expect.equals(499, msg);
            expect.succeeded();
            myPort.close();
          }));
          msg[1].send(42, null);
        }));
      }));
    });
  });
}

main() {
  runTests([test]);
}