sdk/tests/isolate/spawn_function_negative_test.dart

// Copyright (c) 2012, 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.

// Negative test to make sure that we are reaching all assertions.
library spawn_tests;
import 'dart:isolate';
import '../../pkg/unittest/lib/unittest.dart';

child(args) {
  var msg = args[0];
  var reply = args[1];
  reply.send('re: $msg');
}

main() {
  test('message - reply chain', () {
    ReceivePort port = new ReceivePort();
    Isolate.spawn(child, ['hi', port.sendPort]);
    port.listen(expectAsync1((msg) {
      port.close();
      expect(msg, equals('re: hello')); // should be hi, not hello
    }));
  });
}