Sharing metatest logic between unittest and scheduled_test

pkg/scheduled_test/test/scheduled_test/current_schedule_current_task_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 'package:scheduled_test/scheduled_test.dart';
 
-import '../metatest.dart';
+import 'package:metatest/metatest.dart';
 import '../utils.dart';
 
-void main(_, message) {
+void main() => initTests(_test);
+
+void _test(message) {
   initMetatest(message);
 
   setUpTimeout();
 
   expectTestsPass('currentSchedule.currentTask returns the current task while '
       'executing a task', () {
     test('test', () {
       schedule(() => expect('foo', equals('foo')), 'task 1');
 
       schedule(() {
@@ skipping 37 matching lines @@
 
   expectTestsPass('currentSchedule.currentQueue is tasks before the schedule '
       'has started', () {
     test('test', () {
       schedule(() => expect('foo', equals('foo')));
 
       expect(currentSchedule.currentQueue.name, equals('tasks'));
     });
   });
 }