tests/hot_reload/mixin_changed/main.1.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#L917

// B gets its implementation of 'func' from mixin2.
// For the VM, the saved instance of B retains its old field value from mixin1.
// For DDC, the field is updated to read from mixin2's.

mixin Mixin2 {
  var field = 'mixin2';
  func() => 'mixin2';
}

class B extends Object with Mixin2 {}

Future<void> main() async {
  var saved = B();
  Expect.equals('mixin1', saved.field);
  Expect.equals('mixin1', saved.func());
  await hotReload();

  var newer = B();
  if (isVmRuntime) {
    Expect.equals('mixin1', saved.field);
  } else if (isDdcRuntime) {
    Expect.equals('mixin2', saved.field);
  }
  Expect.equals('mixin2', saved.func());
  Expect.equals('mixin2', newer.field);
  Expect.equals('mixin2', newer.func());
}

/** DIFF **/
/*
 // For the VM, the saved instance of B retains its old field value from mixin1.
 // For DDC, the field is updated to read from mixin2's.
 
-mixin Mixin1 {
-  var field = 'mixin1';
-  func() => 'mixin1';
+mixin Mixin2 {
+  var field = 'mixin2';
+  func() => 'mixin2';
 }
 
-class B extends Object with Mixin1 {}
+class B extends Object with Mixin2 {}
 
 Future<void> main() async {
   var saved = B();
*/