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This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
673 lines
30 KiB
Dart
673 lines
30 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/foundation.dart';
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import 'package:flutter/gestures.dart' show DragStartBehavior;
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import 'package:flutter/rendering.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class Leaf extends StatefulWidget {
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const Leaf({required Key super.key, required this.child});
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final Widget child;
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@override
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State<Leaf> createState() => _LeafState();
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}
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class _LeafState extends State<Leaf> {
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bool _keepAlive = false;
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KeepAliveHandle? _handle;
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@override
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void deactivate() {
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_handle?.dispose();
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_handle = null;
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super.deactivate();
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}
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void setKeepAlive(bool value) {
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_keepAlive = value;
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if (_keepAlive) {
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if (_handle == null) {
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_handle = KeepAliveHandle();
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KeepAliveNotification(_handle!).dispatch(context);
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}
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} else {
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_handle?.dispose();
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_handle = null;
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}
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}
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@override
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Widget build(BuildContext context) {
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if (_keepAlive && _handle == null) {
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_handle = KeepAliveHandle();
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KeepAliveNotification(_handle!).dispatch(context);
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}
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return widget.child;
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}
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}
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List<Widget> generateList(Widget child, {required bool impliedMode}) {
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return List<Widget>.generate(100, (int index) {
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final Widget result = Leaf(key: GlobalObjectKey<_LeafState>(index), child: child);
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if (impliedMode) {
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return result;
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}
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return AutomaticKeepAlive(child: result);
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}, growable: false);
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}
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void tests({required bool impliedMode}) {
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testWidgets('AutomaticKeepAlive with ListView with itemExtent', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: impliedMode,
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addRepaintBoundaries: impliedMode,
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addSemanticIndexes: false,
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itemExtent: 12.3, // about 50 widgets visible
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cacheExtent: 0.0,
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children: generateList(const Placeholder(), impliedMode: impliedMode),
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(ListView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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testWidgets('AutomaticKeepAlive with ListView without itemExtent', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: impliedMode,
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addRepaintBoundaries: impliedMode,
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addSemanticIndexes: false,
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cacheExtent: 0.0,
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children: generateList(
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const SizedBox(height: 12.3, child: Placeholder()), // about 50 widgets visible
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impliedMode: impliedMode,
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),
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(ListView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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testWidgets('AutomaticKeepAlive with GridView', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: GridView.count(
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addAutomaticKeepAlives: impliedMode,
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addRepaintBoundaries: impliedMode,
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addSemanticIndexes: false,
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crossAxisCount: 2,
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childAspectRatio: 400.0 / 24.6, // about 50 widgets visible
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cacheExtent: 0.0,
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children: generateList(const Placeholder(), impliedMode: impliedMode),
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(GridView), const Offset(0.0, -300.0)); // about 25 widgets' worth
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(GridView), const Offset(0.0, 300.0)); // back to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(60).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(59), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(60), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(61), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(90), skipOffstage: false), findsNothing);
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});
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}
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void main() {
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group('Explicit automatic keep-alive', () {
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tests(impliedMode: false);
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});
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group('Implied automatic keep-alive', () {
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tests(impliedMode: true);
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});
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testWidgets('AutomaticKeepAlive double', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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cacheExtent: 0.0,
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children: const <Widget>[
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AutomaticKeepAlive(
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child: SizedBox(
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height: 400.0,
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child: Stack(
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children: <Widget>[
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Leaf(key: GlobalObjectKey<_LeafState>(0), child: Placeholder()),
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Leaf(key: GlobalObjectKey<_LeafState>(1), child: Placeholder()),
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],
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),
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),
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),
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AutomaticKeepAlive(child: SizedBox(key: GlobalObjectKey<_LeafState>(2), height: 400.0)),
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AutomaticKeepAlive(child: SizedBox(key: GlobalObjectKey<_LeafState>(3), height: 400.0)),
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],
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0)); // move to bottom
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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await tester.drag(find.byType(ListView), const Offset(0.0, 1000.0)); // move to top
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(0).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0)); // move to bottom
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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const GlobalObjectKey<_LeafState>(1).currentState!.setKeepAlive(true);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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const GlobalObjectKey<_LeafState>(0).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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const GlobalObjectKey<_LeafState>(1).currentState!.setKeepAlive(false);
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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});
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testWidgets('AutomaticKeepAlive double 2', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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addSemanticIndexes: false,
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cacheExtent: 0.0,
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children: const <Widget>[
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AutomaticKeepAlive(
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child: SizedBox(
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height: 400.0,
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child: Stack(
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children: <Widget>[
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Leaf(key: GlobalObjectKey<_LeafState>(0), child: Placeholder()),
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Leaf(key: GlobalObjectKey<_LeafState>(1), child: Placeholder()),
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],
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),
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),
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),
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AutomaticKeepAlive(
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child: SizedBox(
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height: 400.0,
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child: Stack(
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children: <Widget>[
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Leaf(key: GlobalObjectKey<_LeafState>(2), child: Placeholder()),
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Leaf(key: GlobalObjectKey<_LeafState>(3), child: Placeholder()),
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],
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),
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),
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),
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AutomaticKeepAlive(
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child: SizedBox(
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height: 400.0,
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child: Stack(
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children: <Widget>[
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Leaf(key: GlobalObjectKey<_LeafState>(4), child: Placeholder()),
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Leaf(key: GlobalObjectKey<_LeafState>(5), child: Placeholder()),
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],
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),
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),
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),
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],
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),
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),
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);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(4), skipOffstage: false), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(5), skipOffstage: false), findsNothing);
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const GlobalObjectKey<_LeafState>(0).currentState!.setKeepAlive(true);
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await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0)); // move to bottom
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await tester.pump();
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsNothing);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(4)), findsOneWidget);
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expect(find.byKey(const GlobalObjectKey<_LeafState>(5)), findsOneWidget);
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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addAutomaticKeepAlives: false,
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addRepaintBoundaries: false,
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|
addSemanticIndexes: false,
|
|
cacheExtent: 0.0,
|
|
children: const <Widget>[
|
|
AutomaticKeepAlive(
|
|
child: SizedBox(
|
|
height: 400.0,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Leaf(key: GlobalObjectKey<_LeafState>(1), child: Placeholder()),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
AutomaticKeepAlive(
|
|
child: SizedBox(
|
|
height: 400.0,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Leaf(key: GlobalObjectKey<_LeafState>(2), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(3), child: Placeholder()),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
AutomaticKeepAlive(
|
|
child: SizedBox(
|
|
height: 400.0,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Leaf(key: GlobalObjectKey<_LeafState>(4), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(5), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(0), child: Placeholder()),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
await tester.pump(); // Sometimes AutomaticKeepAlive needs an extra pump to clean things up.
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(1), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(4)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(5)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
|
|
await tester.drag(find.byType(ListView), const Offset(0.0, 1000.0)); // move to top
|
|
await tester.pump();
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(4), skipOffstage: false), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(5), skipOffstage: false), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(4)), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(5)), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsNothing);
|
|
const GlobalObjectKey<_LeafState>(0).currentState!.setKeepAlive(false);
|
|
await tester.pump();
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(4), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(5), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsNothing);
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: ListView(
|
|
addAutomaticKeepAlives: false,
|
|
addRepaintBoundaries: false,
|
|
addSemanticIndexes: false,
|
|
cacheExtent: 0.0,
|
|
children: const <Widget>[
|
|
AutomaticKeepAlive(
|
|
child: SizedBox(
|
|
height: 400.0,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Leaf(key: GlobalObjectKey<_LeafState>(1), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(2), child: Placeholder()),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
AutomaticKeepAlive(child: SizedBox(height: 400.0, child: Stack())),
|
|
AutomaticKeepAlive(
|
|
child: SizedBox(
|
|
height: 400.0,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Leaf(key: GlobalObjectKey<_LeafState>(3), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(4), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(5), child: Placeholder()),
|
|
Leaf(key: GlobalObjectKey<_LeafState>(0), child: Placeholder()),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
await tester.pump(); // Sometimes AutomaticKeepAlive needs an extra pump to clean things up.
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(3), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(4), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(5), skipOffstage: false), findsNothing);
|
|
expect(find.byKey(const GlobalObjectKey<_LeafState>(0), skipOffstage: false), findsNothing);
|
|
});
|
|
|
|
testWidgets('AutomaticKeepAlive with keepAlive set to true before initState', (
|
|
WidgetTester tester,
|
|
) async {
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: ListView.builder(
|
|
dragStartBehavior: DragStartBehavior.down,
|
|
addSemanticIndexes: false,
|
|
itemCount: 50,
|
|
itemBuilder: (BuildContext context, int index) {
|
|
if (index == 0) {
|
|
return const _AlwaysKeepAlive(key: GlobalObjectKey<_AlwaysKeepAliveState>(0));
|
|
}
|
|
return SizedBox(height: 44.0, child: Text('FooBar $index'));
|
|
},
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(find.text('keep me alive'), findsOneWidget);
|
|
expect(find.text('FooBar 1'), findsOneWidget);
|
|
expect(find.text('FooBar 2'), findsOneWidget);
|
|
|
|
expect(find.byKey(const GlobalObjectKey<_AlwaysKeepAliveState>(0)), findsOneWidget);
|
|
await tester.drag(find.byType(ListView), const Offset(0.0, -1000.0)); // move to bottom
|
|
await tester.pump();
|
|
expect(
|
|
find.byKey(const GlobalObjectKey<_AlwaysKeepAliveState>(0), skipOffstage: false),
|
|
findsOneWidget,
|
|
);
|
|
|
|
expect(find.text('keep me alive', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('FooBar 1'), findsNothing);
|
|
expect(find.text('FooBar 2'), findsNothing);
|
|
});
|
|
|
|
testWidgets(
|
|
'AutomaticKeepAlive with keepAlive set to true before initState and widget goes out of scope',
|
|
(WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: ListView.builder(
|
|
addSemanticIndexes: false,
|
|
itemCount: 250,
|
|
itemBuilder: (BuildContext context, int index) {
|
|
if (index.isEven) {
|
|
return _AlwaysKeepAlive(key: GlobalObjectKey<_AlwaysKeepAliveState>(index));
|
|
}
|
|
return SizedBox(height: 44.0, child: Text('FooBar $index'));
|
|
},
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(find.text('keep me alive'), findsNWidgets(7));
|
|
expect(find.text('FooBar 1'), findsOneWidget);
|
|
expect(find.text('FooBar 3'), findsOneWidget);
|
|
|
|
expect(find.byKey(const GlobalObjectKey<_AlwaysKeepAliveState>(0)), findsOneWidget);
|
|
|
|
final ScrollableState state = tester.state(find.byType(Scrollable));
|
|
final ScrollPosition position = state.position;
|
|
position.jumpTo(3025.0);
|
|
|
|
await tester.pump();
|
|
expect(
|
|
find.byKey(const GlobalObjectKey<_AlwaysKeepAliveState>(0), skipOffstage: false),
|
|
findsOneWidget,
|
|
);
|
|
|
|
expect(find.text('keep me alive', skipOffstage: false), findsNWidgets(23));
|
|
expect(find.text('FooBar 1'), findsNothing);
|
|
expect(find.text('FooBar 3'), findsNothing);
|
|
expect(find.text('FooBar 73'), findsOneWidget);
|
|
},
|
|
);
|
|
|
|
testWidgets('AutomaticKeepAlive with SliverKeepAliveWidget', (WidgetTester tester) async {
|
|
// We're just doing a basic test here to make sure that the functionality of
|
|
// RenderSliverWithKeepAliveMixin doesn't get regressed or deleted. As testing
|
|
// the full functionality would be cumbersome.
|
|
final RenderSliverMultiBoxAdaptorAlt alternate = RenderSliverMultiBoxAdaptorAlt();
|
|
addTearDown(alternate.dispose);
|
|
final RenderBox child = RenderBoxKeepAlive();
|
|
addTearDown(child.dispose);
|
|
alternate.insert(child);
|
|
|
|
expect(alternate.children.length, 1);
|
|
});
|
|
|
|
testWidgets('Keep alive Listenable has its listener removed once called', (
|
|
WidgetTester tester,
|
|
) async {
|
|
final LeakCheckerHandle handle = LeakCheckerHandle();
|
|
addTearDown(handle.dispose);
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: ListView.builder(
|
|
itemCount: 1,
|
|
itemBuilder: (BuildContext context, int index) {
|
|
return const KeepAliveListenableLeakChecker(
|
|
key: GlobalObjectKey<_KeepAliveListenableLeakCheckerState>(0),
|
|
);
|
|
},
|
|
),
|
|
),
|
|
);
|
|
final _KeepAliveListenableLeakCheckerState state =
|
|
const GlobalObjectKey<_KeepAliveListenableLeakCheckerState>(0).currentState!;
|
|
|
|
expect(handle.hasListeners, false);
|
|
state.dispatch(handle);
|
|
expect(handle.hasListeners, true);
|
|
handle.notifyListeners();
|
|
expect(handle.hasListeners, false);
|
|
});
|
|
}
|
|
|
|
class _AlwaysKeepAlive extends StatefulWidget {
|
|
const _AlwaysKeepAlive({required Key super.key});
|
|
|
|
@override
|
|
State<StatefulWidget> createState() => _AlwaysKeepAliveState();
|
|
}
|
|
|
|
class _AlwaysKeepAliveState extends State<_AlwaysKeepAlive>
|
|
with AutomaticKeepAliveClientMixin<_AlwaysKeepAlive> {
|
|
@override
|
|
bool get wantKeepAlive => true;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
super.build(context);
|
|
return const SizedBox(height: 48.0, child: Text('keep me alive'));
|
|
}
|
|
}
|
|
|
|
class RenderBoxKeepAlive extends RenderBox {}
|
|
|
|
mixin KeepAliveParentDataMixinAlt implements KeepAliveParentDataMixin {
|
|
@override
|
|
bool keptAlive = false;
|
|
|
|
@override
|
|
bool keepAlive = false;
|
|
}
|
|
|
|
class RenderSliverMultiBoxAdaptorAlt extends RenderSliver
|
|
with KeepAliveParentDataMixinAlt, RenderSliverHelpers, RenderSliverWithKeepAliveMixin {
|
|
final List<RenderBox> children = <RenderBox>[];
|
|
|
|
void insert(RenderBox child, {RenderBox? after}) {
|
|
children.add(child);
|
|
}
|
|
|
|
@override
|
|
void visitChildren(RenderObjectVisitor visitor) {
|
|
children.forEach(visitor);
|
|
}
|
|
|
|
@override
|
|
void performLayout() {}
|
|
}
|
|
|
|
class LeakCheckerHandle with ChangeNotifier {
|
|
LeakCheckerHandle() {
|
|
if (kFlutterMemoryAllocationsEnabled) {
|
|
ChangeNotifier.maybeDispatchObjectCreation(this);
|
|
}
|
|
}
|
|
|
|
@override
|
|
bool get hasListeners => super.hasListeners;
|
|
}
|
|
|
|
class KeepAliveListenableLeakChecker extends StatefulWidget {
|
|
const KeepAliveListenableLeakChecker({super.key});
|
|
|
|
@override
|
|
State<KeepAliveListenableLeakChecker> createState() => _KeepAliveListenableLeakCheckerState();
|
|
}
|
|
|
|
class _KeepAliveListenableLeakCheckerState extends State<KeepAliveListenableLeakChecker> {
|
|
void dispatch(Listenable handle) {
|
|
KeepAliveNotification(handle).dispatch(context);
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return const Placeholder();
|
|
}
|
|
}
|