Sharing metatest logic between unittest and scheduled_test

pkg/scheduled_test/test/scheduled_test/nested_task_test.dart

Index: pkg/scheduled_test/test/scheduled_test/nested_task_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_test/nested_task_test.dart b/pkg/scheduled_test/test/scheduled_test/nested_task_test.dart
index 7612db1cb8a1f6aedbdbca2ef8bf1c0a1b62595d..1e8efd0697df484f81d0764e7a5fb1967e73eee6 100644
--- a/pkg/scheduled_test/test/scheduled_test/nested_task_test.dart
+++ b/pkg/scheduled_test/test/scheduled_test/nested_task_test.dart
@@ -5,10 +5,12 @@
 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();