add app_review

packages/app_review/example/test/widget_test.dart

@@ -0,0 +1,23 @@
+// // This is a basic Flutter widget test.
+// // To perform an interaction with a widget in your test, use the WidgetTester utility that Flutter
+// // provides. For example, you can send tap and scroll gestures. You can also use WidgetTester to
+// // find child widgets in the widget tree, read text, and verify that the values of widget properties
+// // are correct.
+
+// import 'package:flutter/material.dart';
+// import 'package:flutter_test/flutter_test.dart';
+// import 'package:app_review_example/main.dart';
+
+// void main() {
+//   testWidgets('Verify App ID', (WidgetTester tester) async {
+//     // Build our app and trigger a frame.
+//     await tester.pumpWidget(new MyApp());
+
+//     // Verify that platform version is retrieved.
+//     expect(
+//         find.byWidgetPredicate(
+//           (Widget widget) => widget is Text && widget.data.startsWith('App ID'),
+//         ),
+//         findsOneWidget);
+//   });
+// }