|  | // Copyright (c) 2025, 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. | 
|  |  | 
|  | import 'package:expect/expect.dart'; | 
|  | import 'package:reload_test/reload_test_utils.dart'; | 
|  |  | 
|  | // Adapted from: | 
|  | // https://github.com/dart-lang/sdk/blob/be2aabd91c67f7f331c49cb74e18fe5e469f04db/runtime/vm/isolate_reload_test.cc#L6456 | 
|  | // Regression test for https://github.com/dart-lang/sdk/issues/51835 | 
|  |  | 
|  | enum Bar { bar } | 
|  |  | 
|  | class Foo { | 
|  | int? a; | 
|  | String? b; | 
|  | toString() => 'foo'; | 
|  | } | 
|  |  | 
|  | helper() { | 
|  | return Foo().toString(); | 
|  | } | 
|  |  | 
|  | Future<void> main() async { | 
|  | Expect.equals('foo', helper()); | 
|  | await hotReload(); | 
|  |  | 
|  | // Modification of an imported library propagates to the importing library. | 
|  | Expect.equals('foo', helper()); | 
|  | } | 
|  |  | 
|  | /** DIFF **/ | 
|  | /* | 
|  |  | 
|  | class Foo { | 
|  | int? a; | 
|  | +  String? b; | 
|  | toString() => 'foo'; | 
|  | } | 
|  |  | 
|  | */ |