Leak memory in tests when dragging a SingleChildScrollView #169119
Description
Steps to reproduce
flutter teston the sample code
Expected results
The tests should pass
Actual results
The test are failing because of a TestRestorationManager and a RestorationBucket are not disposed
Code sample
Code sample
You can also checkout https://github.com/ValentinVignal/flutter_app_stable/tree/leak-memory/single-child-scrollable
// test/flutter_test_config.dart
import 'dart:async';
import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
Future<void> testExecutable(FutureOr<void> Function() testFunction) async {
LeakTesting.enable();
await testFunction();
}
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
class MyWidget extends StatelessWidget {
const MyWidget({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SingleChildScrollView(
child: Column(
children: [for (var i = 0; i < 100; i++) Text('Item $i')],
),
),
),
);
}
}
void main() {
testWidgets('Counter increments smoke test', (WidgetTester tester) async {
await tester.pumpWidget(MyWidget());
expect(find.text('Item 0').hitTestable(), findsOne);
expect(find.text('Item 50').hitTestable(), findsNothing);
await tester.drag(
find.byType(SingleChildScrollView),
const Offset(0, -200),
);
await tester.pump();
expect(find.text('Item 0').hitTestable(), findsNothing);
expect(find.text('Item 30').hitTestable(), findsOne);
});
}
Screenshots or Video
Screenshots / Video demonstration
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Logs
Logs
00:03 +1 -1: (tearDownAll) [E]
Expected: leak free
Actual: <Instance of 'Leaks'>
Which: contains leaks:
# The text is generated by leak_tracker.
# For leak troubleshooting tips open:
# https://github.com/dart-lang/leak_tracker/blob/main/doc/leak_tracking/TROUBLESHOOT.md
notDisposed:
total: 2
objects:
TestRestorationManager:
test: Counter increments smoke test
identityHashCode: 77264436
RestorationBucket:
test: Counter increments smoke test
identityHashCode: 208072902
package:matcher expect
package:leak_tracker_testing/src/leak_testing.dart 69:24 LeakTesting.collectedLeaksReporter.<fn>
package:leak_tracker_flutter_testing/src/testing.dart 72:37 maybeTearDownLeakTrackingForAll
===== asynchronous gap ===========================
dart:async _CustomZone.registerBinaryCallback
package:flutter_test/src/test_compat.dart 302:3 _tearDownForTestFile
To run this test again: /Users/valentinvignal/development/flutter/bin/cache/dart-sdk/bin/dart test /Users/valentinvignal/Projects/flutter_app_stable/test/widget_test.dart -p vm --plain-name '(tearDownAll)'
00:03 +1 -1: Some tests failed. Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.29.3, on macOS 15.4.1 24E263 darwin-x64, locale en-US) [915ms]
• Flutter version 3.29.3 on channel stable at /Users/valentinvignal/development/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision ea121f8859 (6 weeks ago), 2025-04-11 19:10:07 +0000
• Engine revision cf56914b32
• Dart version 3.7.2
• DevTools version 2.42.3
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [3.7s]
• Android SDK at /Users/valentinvignal/Library/Android/sdk
• Platform android-35, build-tools 35.0.0
• ANDROID_HOME = /Users/valentinvignal/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.3+-79915915-b509.11)
• All Android licenses accepted.
[!] Xcode - develop for iOS and macOS (Xcode 16.0) [4.0s]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16A242d
✗ Unable to get list of installed Simulator runtimes.
! CocoaPods 1.15.2 out of date (1.16.2 is recommended).
CocoaPods is a package manager for iOS or macOS platform code.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/to/platform-plugins
To update CocoaPods, see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods
[✓] Chrome - develop for the web [29ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.2) [28ms]
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 21.0.3+-79915915-b509.11)
[✓] VS Code (version 1.100.2) [25ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.110.0
[✓] Connected device (2 available) [6.7s]
• macOS (desktop) • macos • darwin-x64 • macOS 15.4.1 24E263 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 136.0.7103.114
[✓] Network resources [452ms]
• All expected network resources are available.
! Doctor found issues in 1 category.