Change the way Patterns work in scheduled_test/descriptor.

pkg/scheduled_test/lib/src/descriptor/async.dart

Index: pkg/scheduled_test/lib/src/descriptor/async.dart
diff --git a/pkg/scheduled_test/lib/src/descriptor/async.dart b/pkg/scheduled_test/lib/src/descriptor/async.dart
index c33a68cb7532faa337544d15ddb8cc024915bdee..8e72e289040c3517173a8eebcbdf8730699a326c 100644
--- a/pkg/scheduled_test/lib/src/descriptor/async.dart
+++ b/pkg/scheduled_test/lib/src/descriptor/async.dart
@@ -10,7 +10,6 @@ import 'dart:io' as io;
 import '../../descriptor.dart' as descriptor;
 import '../../scheduled_test.dart';
 import '../utils.dart';
-import 'utils.dart';
 
 /// A descriptor that wraps a [Future<Entry>] and forwards all asynchronous
 /// operations to the result of the future. It's designed for use when the
@@ -29,8 +28,10 @@ class Async extends descriptor.Entry {
   Future create([String parent]) =>
     schedule(() => future.then((entry) => entry.create(parent)));
 
-  Future validate([String parent]) =>
-    schedule(() => future.then((entry) => entry.validate(parent)));
+  Future validate([String parent]) => schedule(() => validateNow(parent));
+
+  Future validateNow([String parent]) =>
+    future.then((entry) => entry.validateNow(parent));
 
   Stream<List<int>> load(String path) => errorStream("Async descriptors don't "
       "support load().");