Sharing metatest logic between unittest and scheduled_test

pkg/scheduled_test/test/scheduled_future_matchers_test.dart

Index: pkg/scheduled_test/test/scheduled_future_matchers_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_future_matchers_test.dart b/pkg/scheduled_test/test/scheduled_future_matchers_test.dart
index c1cf2d6ba18f543e5d883845888e47c6ba698f7b..b2fdeed78dcd629b8546208ac2343c8adb5efe4d 100644
--- a/pkg/scheduled_test/test/scheduled_future_matchers_test.dart
+++ b/pkg/scheduled_test/test/scheduled_future_matchers_test.dart
@@ -4,10 +4,12 @@
 
 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();