Split apart several asynchronous tests to reduce timeouts.

pkg/scheduled_test/test/utils.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.
 
 library test_utils;
 
 import 'dart:io';
 import 'dart:async';
 
+import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/src/utils.dart';
 import 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
 
+import 'metatest.dart';
+
 export 'package:scheduled_test/src/utils.dart';
 
 /// Wraps [input] to provide a timeout. If [input] completes before
 /// [milliseconds] have passed, then the return value completes in the same way.
 /// However, if [milliseconds] pass before [input] has completed, [onTimeout] is
 /// run and its result is passed to [input] (with chaining, if it returns a
 /// [Future]).
 ///
 /// Note that timing out will not cancel the asynchronous operation behind
 /// [input].
@@ skipping 15 matching lines @@
 }
 
 /// Returns a [Future] that will complete in [milliseconds].
 Future sleep(int milliseconds) {
   var completer = new Completer();
   mock_clock.newTimer(new Duration(milliseconds: milliseconds), () {
     completer.complete();
   });
   return completer.future;
 }
+
+/// Sets up a timeout for every metatest in this file.
+void setUpTimeout() {
+  metaSetUp(() {
+    // TODO(nweiz): We used to only increase the timeout to 10s for the Windows
+    // bots, but the Linux and Mac bots have started taking upwards of 5s when
+    // running pumpEventQueue, so we're increasing the timeout across the board
+    // (see issue 9248).
+    currentSchedule.timeout = new Duration(seconds: 10);
+  });
+}