Sharing metatest logic between unittest and scheduled_test

pkg/scheduled_test/test/descriptor/file_test.dart

Index: pkg/scheduled_test/test/descriptor/file_test.dart
diff --git a/pkg/scheduled_test/test/descriptor/file_test.dart b/pkg/scheduled_test/test/descriptor/file_test.dart
index f3198193ee8c18185000c51d8c8ace88221d23e5..e1fb47e36921313a4f2f2fdf280142ee6a02354c 100644
--- a/pkg/scheduled_test/test/descriptor/file_test.dart
+++ b/pkg/scheduled_test/test/descriptor/file_test.dart
@@ -8,10 +8,12 @@ import 'package:path/path.dart' as path;
 import 'package:scheduled_test/descriptor.dart' as d;
 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();