Sharing metatest logic between unittest and scheduled_test

pkg/unittest/test/late_exception_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.
 
-library unittestTest;
-
-import 'dart:async';
-import 'dart:isolate';
+library unittest.late_exception_test;
 
 import 'package:unittest/unittest.dart';
 
-part 'utils.dart';
+import 'package:metatest/metatest.dart';
 
-var testName = 'late exception test';
+void main() => initTests(_test);
 
-var testFunction = (_) {
-  var f;
-  test('testOne', () {
-    f = expectAsync(() {});
-    _defer(f);
-  });
-  test('testTwo', () {
-    _defer(expectAsync(() { f(); }));
-  });
-};
+void _test(message) {
+  initMetatest(message);
 
-var expected = buildStatusString(1, 0, 1, 'testOne',
-    message: 'Callback called (2) after test case testOne has already '
-        'been marked as pass.:testTwo:');
+  expectTestResults('late exception test', () {
+    var f;
+    test('testOne', () {
+      f = expectAsync(() {});
+      defer(f);
+    });
+    test('testTwo', () {
+      defer(expectAsync(() {
+        f();
+      }));
+    });
+  }, [{
+      'description': 'testOne',
+      'message': 'Callback called (2) after test case testOne has already been '
+          'marked as pass.',
+      'result': 'error',
+    }, {
+      'description': 'testTwo',
+      'result': 'pass',
+    }]);
+}