pkg/vm_service/test/instance_field_order_rpc_test.dart

// Copyright (c) 2023, 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:vm_service/vm_service.dart';
import 'package:test/test.dart';

import 'common/test_helper.dart';

class Super {
  // Make sure these fields are not removed by the tree shaker.
  @pragma("vm:entry-point")
  final z = 1;
  @pragma("vm:entry-point")
  final y = 2;
}

class Sub extends Super {
  @pragma("vm:entry-point")
  final y = 3;
  @pragma("vm:entry-point")
  final x = 4;
}

@pragma("vm:entry-point")
Sub getSub() => Sub();

final tests = <IsolateTest>[
  (VmService service, IsolateRef isolateRef) async {
    final isolateId = isolateRef.id!;
    final isolate = await service.getIsolate(isolateId);
    // Call eval to get a Dart list.
    final evalResult = await service.invoke(
      isolateId,
      isolate.rootLib!.id!,
      'getSub',
      [],
    ) as InstanceRef;
    final result = await service.getObject(
      isolateId,
      evalResult.id!,
    ) as Instance;

    expect(result.kind, InstanceKind.kPlainInstance);
    expect(result.classRef!.name, 'Sub');
    expect(result.size, isPositive);
    final fields = result.fields!;
    expect(fields.length, 4);
    expect(fields[0].decl!.name, 'z');
    expect(fields[0].value.valueAsString, '1');
    expect(fields[1].decl!.name, 'y');
    expect(fields[1].value.valueAsString, '2');
    expect(fields[2].decl!.name, 'y');
    expect(fields[2].value.valueAsString, '3');
    expect(fields[3].decl!.name, 'x');
    expect(fields[3].value.valueAsString, '4');
  },
];

void main([args = const <String>[]]) => runIsolateTests(
      args,
      tests,
      'instance_field_order_rpc_test.dart',
    );