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// 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.
// Formatting can break multitests, so don't format them.
// dart format off
// Verify that cancelled [Directory.watch] subscriptions do not waste memory.
import 'dart:io';
import 'package:expect/expect.dart';
void main() async {
final startRss = ProcessInfo.currentRss; //# measure: ok
for (var i = 0; i < 1024; i++) {
final subscription = Directory.systemTemp.watch().listen((event) {});
await subscription.cancel();
}
final endRss = ProcessInfo.currentRss; //# measure: continued
final allocatedBytes = (endRss - startRss); //# measure: continued
final limit = 10 * 1024 * 1024; //# measure: continued
Expect.isTrue(allocatedBytes < limit, //# measure: continued
'expected VM RSS growth to be below ${limit} but got ${allocatedBytes}'); //# measure: continued
}