pkg/vm_service/test/mark_main_isolate_as_system_isolate_test.dart

// Copyright (c) 2021, 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 'dart:isolate';
import 'package:test/test.dart';
import 'package:vm_service/vm_service.dart' as service;

import 'common/service_test_common.dart';
import 'common/test_helper.dart';

foo(void _) async {
  print('non system isolate started');
  while (true) {}
}

testMain() async {
  await Isolate.spawn<void>(foo, null);
  print('started system isolate main');
  while (true) {}
}

var tests = <VMTest>[
  (service.VmService service) async {
    final vm = await service.getVM();
    expect(vm.isolates!.length, 1);
    expect(vm.isolates!.first.name, 'foo');
    expect(vm.systemIsolates!.length, greaterThanOrEqualTo(1));
    expect(vm.systemIsolates!.where((e) => e.name == 'main').isNotEmpty, true);
  }
];

main([args = const <String>[]]) => runVMTests(
      args,
      tests,
      'mark_main_isolate_as_system_isolate_test.dart',
      testeeConcurrent: testMain,
      extraArgs: ['--mark-main-isolate-as-system-isolate'],
    );