Heartbeat implementation of dart:mirrors.

runtime/tests/vm/src/IsolateMirrorIdleTest.dart

Index: runtime/tests/vm/src/IsolateMirrorIdleTest.dart
===================================================================
--- runtime/tests/vm/src/IsolateMirrorIdleTest.dart	(revision 0)
+++ runtime/tests/vm/src/IsolateMirrorIdleTest.dart	(revision 0)
@@ -0,0 +1,31 @@
+// 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 checking implemention of IsolateMirror.
+
+#library('IsolateMirrorIdleTest');
+
+#import('dart:isolate');
+#import('dart:mirrors');
+
+class IdleIsolate extends Isolate {
+  void main() {
+    // This isolate goes idle waiting for a message which never arrives.
+    port.receive((message, replyTo) {
+        print("IdleIsolate received $message");
+        Expect.isTrue(false);
+      });
+  }
+}
+
+void testIsolateMirror(port) {
+  isolateMirrorOf(port).then((IsolateMirror mirror) {
+      Expect.isTrue(mirror.debugName.contains("IdleIsolate"));
+    });
+}
+
+void main() {
+  // Test that I can reflect on a busy isolate.
+  new IdleIsolate().spawn().then(testIsolateMirror);
+}