blob: 8b6c33738ac47c76c588689516a171faf446f5e4 [file] [log] [blame]
// Copyright (c) 2019, 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:async';
import 'package:test/test.dart';
import 'package:vm_service/vm_service.dart';
import 'common/test_helper.dart';
Future getFlagValue(VmService service, String flagName) async {
final result = await service.getFlagList();
final flags = result.flags;
for (final flag in flags) {
if ( == flagName) {
return flag.valueAsString;
var tests = <VMTest>[
// Modify a flag which does not exist.
(VmService service) async {
final Error result = await service.setFlag('does_not_exist', 'true');
expect(result.message, 'Cannot set flag: flag not found');
// Modify a flag with the wrong value type.
(VmService service) async {
final Error result =
await service.setFlag('pause_isolates_on_start', 'not-boolean');
expect(result.message, equals('Cannot set flag: invalid value'));
// Modify a flag with the right value type.
(VmService service) async {
final result = await service.setFlag('pause_isolates_on_start', 'false');
expect(result, TypeMatcher<Success>());
// Modify a flag which cannot be set at runtime.
(VmService service) async {
final Error result = await service.setFlag('random_seed', '42');
expect(result.message, 'Cannot set flag: cannot change at runtime');
// Modify the profile_period at runtime.
(VmService service) async {
final kProfilePeriod = 'profile_period';
final kValue = 100;
expect(await getFlagValue(service, kProfilePeriod), '1000');
final completer = Completer();
final stream = await service.onVMEvent;
var subscription;
subscription = stream.listen((Event event) {
if (event.kind == EventKind.kVMFlagUpdate) {
expect(event.flag, kProfilePeriod);
expect(event.newValue, kValue.toString());
await service.streamListen(EventStreams.kVM);
final result = await service.setFlag(kProfilePeriod, kValue.toString());
expect(result, TypeMatcher<Success>());
await completer.future;
expect(await getFlagValue(service, kProfilePeriod), kValue.toString());
await service.streamCancel(EventStreams.kVM);
main([args = const <String>[]]) async => runVMTests(args, tests);