Properly handle top-levled errors in scheduled_test.

pkg/scheduled_test/test/scheduled_test/unhandled_error_test.dart

Index: pkg/scheduled_test/test/scheduled_test/unhandled_error_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_test/unhandled_error_test.dart b/pkg/scheduled_test/test/scheduled_test/unhandled_error_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..aaf87f38328fb516160ef2b8e1cb9e4e6cf0c718
--- /dev/null
+++ b/pkg/scheduled_test/test/scheduled_test/unhandled_error_test.dart
@@ -0,0 +1,27 @@
+// Copyright (c) 2014, 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:scheduled_test/scheduled_test.dart';
+import 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
+
+import '../metatest.dart';
+import '../utils.dart';
+
+void main(_, message) {
+  initMetatest(message);
+
+  setUpTimeout();
+
+  expectTestFails("a top-leveled error should be converted to a schedule error",
+      () {
+    schedule(() {
+      new Future.microtask(() => throw 'error');
+      return pumpEventQueue();
+    });
+  }, (errors) {
+    expect(errors.first.error, equals('error'));
+  });
+}