Split apart several asynchronous tests to reduce timeouts.

pkg/scheduled_test/test/scheduled_test/wrap_async_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 'dart:io';
+
+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() {
+  setUpTimeout();
+
+  expectTestsFail('an out-of-band failure in wrapAsync is handled', () {
+    mock_clock.mock().run();
+    test('test', () {
+      schedule(() {
+        sleep(1).then(wrapAsync((_) => expect('foo', equals('bar'))));
+      });
+      schedule(() => sleep(2));
+    });
+  });
+
+  expectTestsFail('an out-of-band failure in wrapAsync that finishes after the '
+      'schedule is handled', () {
+    mock_clock.mock().run();
+    test('test', () {
+      schedule(() {
+        sleep(2).then(wrapAsync((_) => expect('foo', equals('bar'))));
+      });
+      schedule(() => sleep(1));
+    });
+  });
+}