blob: 4d9c458eece4a4258d6aba7fbf68038892c3753f [file] [log] [blame]
// 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:async';
import 'dart:io';
import 'package:dds/dds.dart';
import 'package:dds_service_extensions/dds_service_extensions.dart';
import 'package:test/test.dart';
import 'package:vm_service/vm_service_io.dart';
import 'common/test_helper.dart';
// Regression test for
void main() {
late Process process;
late DartDevelopmentService dds;
setUp(() async {
process = await spawnDartProcess(
tearDown(() async {
await dds.shutdown();
'Ensure various historical streams can be cancelled without throwing StateError',
() async {
dds = await DartDevelopmentService.startDartDevelopmentService(
expect(dds.isRunning, true);
final service = await vmServiceConnectUri(dds.wsUri.toString());
// This creates two single-subscription streams which are backed by a
// broadcast stream.
final stream1 = service.onExtensionEventWithHistory;
final stream2 = service.onExtensionEventWithHistory;
// Subscribe to each stream so `cancel()` doesn't hang.
final sub1 = stream1.listen((_) => null);
final sub2 = stream2.listen((_) => null);
// Give some time for the streams to get setup.
await Future.delayed(const Duration(seconds: 1));
// The second call to `cancel()` shouldn't cause an exception to be thrown
// when we try to cancel the underlying broadcast stream again.
await sub1.cancel();
await sub2.cancel();
timeout: Timeout.none,