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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/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),
);
});
}