Roll Observatory packages and add a roll script

packages/async/test/stream_zip_zone_test.dart

+// Copyright (c) 2013, 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.
+
+import "dart:async";
+import "package:test/test.dart";
+
+// Test that stream listener callbacks all happen in the zone where the
+// listen occurred.
+
+main() {
+ StreamController controller;
+ controller = new StreamController();
+ testStream("singlesub-async", controller, controller.stream);
+ controller = new StreamController.broadcast();
+ testStream("broadcast-async", controller, controller.stream);
+ controller = new StreamController();
+ testStream("asbroadcast-async", controller,
+                                 controller.stream.asBroadcastStream());
+
+ controller = new StreamController(sync: true);
+ testStream("singlesub-sync", controller, controller.stream);
+ controller = new StreamController.broadcast(sync: true);
+ testStream("broadcast-sync", controller, controller.stream);
+ controller = new StreamController(sync: true);
+ testStream("asbroadcast-sync", controller,
+                                controller.stream.asBroadcastStream());
+}
+
+void testStream(String name, StreamController controller, Stream stream) {
+  test(name, () {
+    Zone outer = Zone.current;
+    runZoned(() {
+      Zone newZone1 = Zone.current;
+      StreamSubscription sub;
+      sub = stream.listen(expectAsync((v) {
+        expect(v, 42);
+        expect(Zone.current, newZone1);
+        outer.run(() {
+          sub.onData(expectAsync((v) {
+            expect(v, 37);
+            expect(Zone.current, newZone1);
+            runZoned(() {
+              sub.onData(expectAsync((v) {
+                expect(v, 87);
+                expect(Zone.current, newZone1);
+              }));
+            });
+            if (controller is SynchronousStreamController) {
+              scheduleMicrotask(() => controller.add(87));
+            } else {
+              controller.add(87);
+            }
+          }));
+        });
+        if (controller is SynchronousStreamController) {
+          scheduleMicrotask(() => controller.add(37));
+        } else {
+          controller.add(37);
+        }
+      }));
+    });
+    controller.add(42);
+  });
+}