Clean up isolate tests.

tests/isolate/isolate_throws_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.
 
 // Dart test program for testing that exceptions in other isolates bring down
 // the program.
 
-library isolate2_negative_test;
 import 'dart:isolate';

[kustermann, 2013/11/28 09:19:47]

Keep imports sorted.

[floitsch, 2013/11/28 14:35:26]

Done.

+import 'dart:async';
 import "package:async_helper/async_helper.dart";
 
-void entry(msg) {
-  throw "foo";
+void entry(SendPort replyTo) {
+  throw "foo";  /// 01: runtime error
+  replyTo.send("done");
 }
 
 main() {
-  // We start an asynchronous operation, but since we don't expect to get
-  // anything back except an exception there is no asyncEnd().
-  // If the exception is not thrown this test will timeout.
   asyncStart();
-  Isolate.spawn(entry, null);
+  ReceivePort rp = new ReceivePort();
+  Isolate.spawn(entry, rp.sendPort);
+  rp.first.then((_) {
+    asyncEnd();

[kustermann, 2013/11/28 09:19:47]

For the positive test (i.e. the /none test), you should assert here that you get
"done" back.

[floitsch, 2013/11/28 14:35:26]

Done.

+  });
 }