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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/src/rendering/sliver.dart';
import 'package:flutter/src/widgets/basic.dart';
import 'package:flutter/src/widgets/framework.dart';
import 'package:flutter/src/widgets/layout_builder.dart';
import 'package:flutter/src/widgets/scroll_view.dart';
import 'package:flutter/src/widgets/sliver_layout_builder.dart';
import 'package:flutter_test/flutter_test.dart';
class Wrapper extends StatelessWidget {
const Wrapper({
Key? key,
required this.child,
}) : assert(child != null),
super(key: key);
final Widget child;
@override
Widget build(BuildContext context) => child;
}
void main() {
testWidgets('Moving a global key from another LayoutBuilder at layout time', (WidgetTester tester) async {
final GlobalKey victimKey = GlobalKey();
await tester.pumpWidget(Row(
textDirection: TextDirection.ltr,
children: <Widget>[
Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return const SizedBox();
}),
),
Wrapper(
child: Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return Wrapper(
child: SizedBox(key: victimKey),
);
}),
),
),
],
));
await tester.pumpWidget(Row(
textDirection: TextDirection.ltr,
children: <Widget>[
Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return Wrapper(
child: SizedBox(key: victimKey),
);
}),
),
Wrapper(
child: Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return const SizedBox();
}),
),
),
],
));
expect(tester.takeException(), null);
});
testWidgets('Moving a global key from another SliverLayoutBuilder at layout time', (WidgetTester tester) async {
final GlobalKey victimKey1 = GlobalKey();
final GlobalKey victimKey2 = GlobalKey();
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey1, padding: const EdgeInsets.fromLTRB(1, 2, 3, 4));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey2, padding: const EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return const SliverPadding(padding: EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
],
),
),
);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey2, padding: const EdgeInsets.fromLTRB(1, 2, 3, 4));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return const SliverPadding(padding: EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey1, padding: const EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
],
),
),
);
expect(tester.takeException(), null);
});
}