tests/hot_reload/change_instance_format3/main.0.dart

// 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/1a486499bf73ee5b007abbe522b94869a1f36d02/runtime/vm/isolate_reload_test.cc#L3908

// Tests reload succeeds when instance format changes.
// Change: Foo {a, b, c:42, d}  -> Foo {c:42, g}
// Validate: c keeps the value in the retained Foo object.

class Foo<A, B> {
  var a;
  var b;
  var c;
  var d;
}

helper() {
  f = Foo();
  f.a = 1;
  f.b = 2;
  f.c = 3;
  f.d = 4;
}

var f;

Future<void> main() async {
  helper();
  Expect.equals(3, f.c);
  await hotReload();

  Expect.equals(3, f.c);
}