| // 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/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| // Regression test for https://github.com/flutter/flutter/issues/96024 |
| testWidgets('CustomScrollView.center update test 1', (WidgetTester tester) async { |
| final Key centerKey = UniqueKey(); |
| late StateSetter setState; |
| bool hasKey = false; |
| await tester.pumpWidget(Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| center: centerKey, |
| slivers: <Widget>[ |
| const SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| StatefulBuilder( |
| key: centerKey, |
| builder: (BuildContext context, StateSetter setter) { |
| setState = setter; |
| if (hasKey) { |
| return const SliverToBoxAdapter( |
| key: Key('b'), |
| child: SizedBox(height: 100.0), |
| ); |
| } else { |
| return const SliverToBoxAdapter( |
| child: SizedBox(height: 100.0), |
| ); |
| } |
| }, |
| ), |
| ], |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| |
| // Change the center key will trigger the old RenderObject remove and a new |
| // RenderObject insert. |
| setState(() { |
| hasKey = true; |
| }); |
| |
| await tester.pumpAndSettle(); |
| |
| // Pass without throw. |
| }); |
| |
| testWidgets('CustomScrollView.center update test 2', (WidgetTester tester) async { |
| const List<Widget> slivers1 = <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('c'), child: SizedBox(height: 100.0)), |
| ]; |
| |
| const List<Widget> slivers2 = <Widget>[ |
| SliverToBoxAdapter(key: Key('c'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('d'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| ]; |
| |
| Widget buildFrame(List<Widget> slivers, Key center) { |
| return Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| center: center, |
| slivers: slivers, |
| ), |
| ); |
| } |
| |
| await tester.pumpWidget(buildFrame(slivers1, const Key('b'))); |
| await tester.pumpAndSettle(); |
| |
| await tester.pumpWidget(buildFrame(slivers2, const Key('d'))); |
| await tester.pumpAndSettle(); |
| |
| // Pass without throw. |
| }); |
| |
| testWidgets('CustomScrollView.center', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('a'), |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect( |
| tester.getRect(find.descendant(of: find.byKey(const Key('a')), matching: find.byType(SizedBox))), |
| const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0), |
| ); |
| expect( |
| tester.getRect(find.descendant(of: find.byKey(const Key('b')), matching: find.byType(SizedBox))), |
| const Rect.fromLTRB(0.0, 100.0, 800.0, 200.0), |
| ); |
| }); |
| |
| testWidgets('CustomScrollView.center', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('b'), |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('a'), skipOffstage: false), |
| matching: find.byType(SizedBox, skipOffstage: false), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, -100.0, 800.0, 0.0), |
| ); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('b')), |
| matching: find.byType(SizedBox), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0), |
| ); |
| }); |
| |
| testWidgets('CustomScrollView.anchor', (WidgetTester tester) async { |
| await tester.pumpWidget(const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(key: Key('a'), child: SizedBox(height: 100.0)), |
| SliverToBoxAdapter(key: Key('b'), child: SizedBox(height: 100.0)), |
| ], |
| center: Key('b'), |
| anchor: 1.0, |
| ), |
| )); |
| await tester.pumpAndSettle(); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('a')), |
| matching: find.byType(SizedBox), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 500.0, 800.0, 600.0), |
| ); |
| expect( |
| tester.getRect( |
| find.descendant( |
| of: find.byKey(const Key('b'), skipOffstage: false), |
| matching: find.byType(SizedBox, skipOffstage: false), |
| ), |
| ), |
| const Rect.fromLTRB(0.0, 600.0, 800.0, 700.0), |
| ); |
| }); |
| } |