Sharing metatest logic between unittest and scheduled_test

pkg/scheduled_test/test/scheduled_test/current_schedule_errors_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 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
 
-import '../metatest.dart';
+import 'package:metatest/metatest.dart';
 import '../utils.dart';
 
-void main(_, message) {
+void main() => initTests(_test);
+
+void _test(message) {
   initMetatest(message);
 
   setUpTimeout();
 
-  expectTests('a scheduled test with an out-of-band error should fail', () {
+  expectTestResults('a scheduled test with an out-of-band error should fail',
+      () {
     mock_clock.mock().run();
     test('test 1', () {
       sleep(1).then((_) => throw 'error');
     });
 
     test('test 2', () {
       return sleep(2);
     });
-  }, {'test 1': ERROR, 'test 2': PASS});
+  }, [{
+    'description': 'test 1',
+    'result': 'error'
+  }, {
+    'description': 'test 2',
+    'result': 'pass'
+  }]);
 
   expectTestsPass('currentSchedule.errors contains the error in the onComplete '
       'queue', () {
     var errors;
     test('test 1', () {
       currentSchedule.onComplete.schedule(() {
         errors = currentSchedule.errors;
       });
 
       throw 'error';
@@ skipping 204 matching lines @@
         throw 'in-band';
       }));
     });
 
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error), equals(['in-band', 'out-of-band']));
     });
   }, passing: ['test 2']);
 }