mirror of
https://github.com/flutter/flutter.git
synced 2026-02-12 13:56:40 +08:00
a04fb324be
Bumps the Dart version to 3.8 across the repo (excluding engine/src/flutter/third_party) and applies formatting updates from Dart 3.8. ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
1138 lines
38 KiB
Dart
1138 lines
38 KiB
Dart
// 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/rendering.dart';
|
|
import 'package:flutter/widgets.dart';
|
|
import 'package:flutter_test/flutter_test.dart';
|
|
import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
|
|
|
|
import '../rendering/rendering_tester.dart' show TestCallbackPainter;
|
|
|
|
class TestPaintingContext implements PaintingContext {
|
|
final List<Invocation> invocations = <Invocation>[];
|
|
|
|
@override
|
|
void noSuchMethod(Invocation invocation) {
|
|
invocations.add(invocation);
|
|
}
|
|
}
|
|
|
|
void main() {
|
|
testWidgets('Can construct an empty Stack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(const Directionality(textDirection: TextDirection.ltr, child: Stack()));
|
|
});
|
|
|
|
testWidgets('Can construct an empty Centered Stack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(child: Stack()),
|
|
),
|
|
);
|
|
});
|
|
|
|
testWidgets('Can change position data', (WidgetTester tester) async {
|
|
const Key key = Key('container');
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
alignment: Alignment.topLeft,
|
|
children: <Widget>[
|
|
Positioned(left: 10.0, child: SizedBox(key: key, width: 10.0, height: 10.0)),
|
|
],
|
|
),
|
|
);
|
|
|
|
Element container;
|
|
StackParentData parentData;
|
|
|
|
container = tester.element(find.byKey(key));
|
|
parentData = container.renderObject!.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, isNull);
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, equals(10.0));
|
|
expect(parentData.width, isNull);
|
|
expect(parentData.height, isNull);
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
alignment: Alignment.topLeft,
|
|
children: <Widget>[
|
|
Positioned(right: 10.0, child: SizedBox(key: key, width: 10.0, height: 10.0)),
|
|
],
|
|
),
|
|
);
|
|
|
|
container = tester.element(find.byKey(key));
|
|
parentData = container.renderObject!.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, equals(10.0));
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, isNull);
|
|
expect(parentData.width, isNull);
|
|
expect(parentData.height, isNull);
|
|
});
|
|
|
|
testWidgets('Can remove parent data', (WidgetTester tester) async {
|
|
const Key key = Key('container');
|
|
const SizedBox sizedBox = SizedBox(key: key, width: 10.0, height: 10.0);
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
textDirection: TextDirection.ltr,
|
|
children: <Widget>[Positioned(left: 10.0, child: sizedBox)],
|
|
),
|
|
);
|
|
Element containerElement = tester.element(find.byKey(key));
|
|
|
|
StackParentData parentData;
|
|
parentData = containerElement.renderObject!.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, isNull);
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, equals(10.0));
|
|
expect(parentData.width, isNull);
|
|
expect(parentData.height, isNull);
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(textDirection: TextDirection.ltr, children: <Widget>[sizedBox]),
|
|
);
|
|
containerElement = tester.element(find.byKey(key));
|
|
|
|
parentData = containerElement.renderObject!.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, isNull);
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, isNull);
|
|
expect(parentData.width, isNull);
|
|
expect(parentData.height, isNull);
|
|
});
|
|
|
|
testWidgets('Can align non-positioned children (LTR)', (WidgetTester tester) async {
|
|
const Key child0Key = Key('child0');
|
|
const Key child1Key = Key('child1');
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: Stack(
|
|
alignment: Alignment.center,
|
|
children: <Widget>[
|
|
SizedBox(key: child0Key, width: 20.0, height: 20.0),
|
|
SizedBox(key: child1Key, width: 10.0, height: 10.0),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
final Element child0 = tester.element(find.byKey(child0Key));
|
|
final StackParentData child0RenderObjectParentData =
|
|
child0.renderObject!.parentData! as StackParentData;
|
|
expect(child0RenderObjectParentData.offset, equals(Offset.zero));
|
|
|
|
final Element child1 = tester.element(find.byKey(child1Key));
|
|
final StackParentData child1RenderObjectParentData =
|
|
child1.renderObject!.parentData! as StackParentData;
|
|
expect(child1RenderObjectParentData.offset, equals(const Offset(5.0, 5.0)));
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: Stack(
|
|
alignment: AlignmentDirectional.bottomEnd,
|
|
children: <Widget>[
|
|
SizedBox(key: child0Key, width: 20.0, height: 20.0),
|
|
SizedBox(key: child1Key, width: 10.0, height: 10.0),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(child0RenderObjectParentData.offset, equals(Offset.zero));
|
|
expect(child1RenderObjectParentData.offset, equals(const Offset(10.0, 10.0)));
|
|
});
|
|
|
|
testWidgets('Can align non-positioned children (RTL)', (WidgetTester tester) async {
|
|
const Key child0Key = Key('child0');
|
|
const Key child1Key = Key('child1');
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.rtl,
|
|
child: Center(
|
|
child: Stack(
|
|
alignment: Alignment.center,
|
|
children: <Widget>[
|
|
SizedBox(key: child0Key, width: 20.0, height: 20.0),
|
|
SizedBox(key: child1Key, width: 10.0, height: 10.0),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
final Element child0 = tester.element(find.byKey(child0Key));
|
|
final StackParentData child0RenderObjectParentData =
|
|
child0.renderObject!.parentData! as StackParentData;
|
|
expect(child0RenderObjectParentData.offset, equals(Offset.zero));
|
|
|
|
final Element child1 = tester.element(find.byKey(child1Key));
|
|
final StackParentData child1RenderObjectParentData =
|
|
child1.renderObject!.parentData! as StackParentData;
|
|
expect(child1RenderObjectParentData.offset, equals(const Offset(5.0, 5.0)));
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.rtl,
|
|
child: Center(
|
|
child: Stack(
|
|
alignment: AlignmentDirectional.bottomEnd,
|
|
children: <Widget>[
|
|
SizedBox(key: child0Key, width: 20.0, height: 20.0),
|
|
SizedBox(key: child1Key, width: 10.0, height: 10.0),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(child0RenderObjectParentData.offset, equals(Offset.zero));
|
|
expect(child1RenderObjectParentData.offset, equals(const Offset(0.0, 10.0)));
|
|
});
|
|
|
|
testWidgets('Can construct an empty IndexedStack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(textDirection: TextDirection.ltr, child: IndexedStack()),
|
|
);
|
|
});
|
|
|
|
testWidgets('Can construct an empty Centered IndexedStack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(child: IndexedStack()),
|
|
),
|
|
);
|
|
});
|
|
|
|
testWidgets('Can construct an IndexedStack', (WidgetTester tester) async {
|
|
const int itemCount = 3;
|
|
late List<int> itemsPainted;
|
|
|
|
Widget buildFrame(int index) {
|
|
itemsPainted = <int>[];
|
|
final List<Widget> items = List<Widget>.generate(itemCount, (int i) {
|
|
return CustomPaint(
|
|
painter: TestCallbackPainter(
|
|
onPaint: () {
|
|
itemsPainted.add(i);
|
|
},
|
|
),
|
|
child: Text('$i', textDirection: TextDirection.ltr),
|
|
);
|
|
});
|
|
return Center(
|
|
child: IndexedStack(alignment: Alignment.topLeft, index: index, children: items),
|
|
);
|
|
}
|
|
|
|
void expectFindsChild(int n) {
|
|
for (int i = 0; i < 3; i++) {
|
|
expect(find.text('$i', skipOffstage: false), findsOneWidget);
|
|
|
|
if (i == n) {
|
|
expect(find.text('$i'), findsOneWidget);
|
|
} else {
|
|
expect(find.text('$i'), findsNothing);
|
|
}
|
|
}
|
|
}
|
|
|
|
await tester.pumpWidget(buildFrame(0));
|
|
expectFindsChild(0);
|
|
expect(itemsPainted, equals(<int>[0]));
|
|
|
|
await tester.pumpWidget(buildFrame(1));
|
|
expectFindsChild(1);
|
|
expect(itemsPainted, equals(<int>[1]));
|
|
|
|
await tester.pumpWidget(buildFrame(2));
|
|
expectFindsChild(2);
|
|
expect(itemsPainted, equals(<int>[2]));
|
|
});
|
|
|
|
testWidgets('Can hit test an IndexedStack', (WidgetTester tester) async {
|
|
const Key key = Key('indexedStack');
|
|
const int itemCount = 3;
|
|
late List<int> itemsTapped;
|
|
|
|
Widget buildFrame(int index) {
|
|
itemsTapped = <int>[];
|
|
final List<Widget> items = List<Widget>.generate(itemCount, (int i) {
|
|
return GestureDetector(
|
|
child: Text('$i', textDirection: TextDirection.ltr),
|
|
onTap: () {
|
|
itemsTapped.add(i);
|
|
},
|
|
);
|
|
});
|
|
return Center(
|
|
child: IndexedStack(alignment: Alignment.topLeft, key: key, index: index, children: items),
|
|
);
|
|
}
|
|
|
|
await tester.pumpWidget(buildFrame(0));
|
|
expect(itemsTapped, isEmpty);
|
|
await tester.tap(find.byKey(key));
|
|
expect(itemsTapped, <int>[0]);
|
|
|
|
await tester.pumpWidget(buildFrame(2));
|
|
expect(itemsTapped, isEmpty);
|
|
await tester.tap(find.byKey(key));
|
|
expect(itemsTapped, <int>[2]);
|
|
});
|
|
|
|
testWidgets('IndexedStack sets non-selected indexes to visible=false', (
|
|
WidgetTester tester,
|
|
) async {
|
|
Widget buildStack({required int itemCount, required int? selectedIndex}) {
|
|
final List<Widget> children = List<Widget>.generate(itemCount, (int i) {
|
|
return _ShowVisibility(index: i);
|
|
});
|
|
return Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: selectedIndex, children: children),
|
|
);
|
|
}
|
|
|
|
await tester.pumpWidget(buildStack(itemCount: 3, selectedIndex: null));
|
|
expect(find.text('index 0 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 1 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 2 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
|
|
await tester.pumpWidget(buildStack(itemCount: 3, selectedIndex: 0));
|
|
expect(find.text('index 0 is visible ? true', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 1 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 2 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
|
|
await tester.pumpWidget(buildStack(itemCount: 3, selectedIndex: 1));
|
|
expect(find.text('index 0 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 1 is visible ? true', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 2 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
|
|
await tester.pumpWidget(buildStack(itemCount: 3, selectedIndex: 2));
|
|
expect(find.text('index 0 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 1 is visible ? false', skipOffstage: false), findsOneWidget);
|
|
expect(find.text('index 2 is visible ? true', skipOffstage: false), findsOneWidget);
|
|
});
|
|
|
|
testWidgets('Can set width and height', (WidgetTester tester) async {
|
|
const Key key = Key('container');
|
|
|
|
const BoxDecoration kBoxDecoration = BoxDecoration(color: Color(0xFF00FF00));
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
textDirection: TextDirection.ltr,
|
|
children: <Widget>[
|
|
Positioned(
|
|
left: 10.0,
|
|
width: 11.0,
|
|
height: 12.0,
|
|
child: DecoratedBox(key: key, decoration: kBoxDecoration),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
|
|
Element box;
|
|
RenderBox renderBox;
|
|
StackParentData parentData;
|
|
|
|
box = tester.element(find.byKey(key));
|
|
renderBox = box.renderObject! as RenderBox;
|
|
parentData = renderBox.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, isNull);
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, equals(10.0));
|
|
expect(parentData.width, equals(11.0));
|
|
expect(parentData.height, equals(12.0));
|
|
expect(parentData.offset.dx, equals(10.0));
|
|
expect(parentData.offset.dy, equals(0.0));
|
|
expect(renderBox.size.width, equals(11.0));
|
|
expect(renderBox.size.height, equals(12.0));
|
|
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
textDirection: TextDirection.ltr,
|
|
children: <Widget>[
|
|
Positioned(
|
|
right: 10.0,
|
|
width: 11.0,
|
|
height: 12.0,
|
|
child: DecoratedBox(key: key, decoration: kBoxDecoration),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
|
|
box = tester.element(find.byKey(key));
|
|
renderBox = box.renderObject! as RenderBox;
|
|
parentData = renderBox.parentData! as StackParentData;
|
|
expect(parentData.top, isNull);
|
|
expect(parentData.right, equals(10.0));
|
|
expect(parentData.bottom, isNull);
|
|
expect(parentData.left, isNull);
|
|
expect(parentData.width, equals(11.0));
|
|
expect(parentData.height, equals(12.0));
|
|
expect(parentData.offset.dx, equals(779.0));
|
|
expect(parentData.offset.dy, equals(0.0));
|
|
expect(renderBox.size.width, equals(11.0));
|
|
expect(renderBox.size.height, equals(12.0));
|
|
});
|
|
|
|
testWidgets('Can set and update clipBehavior', (WidgetTester tester) async {
|
|
await tester.pumpWidget(const Stack(textDirection: TextDirection.ltr));
|
|
final RenderStack renderObject = tester.allRenderObjects.whereType<RenderStack>().first;
|
|
expect(renderObject.clipBehavior, equals(Clip.hardEdge));
|
|
|
|
await tester.pumpWidget(const Stack(textDirection: TextDirection.ltr));
|
|
expect(renderObject.clipBehavior, equals(Clip.hardEdge));
|
|
});
|
|
|
|
testWidgets('Clip.none is respected by describeApproximateClip', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Stack(
|
|
textDirection: TextDirection.ltr,
|
|
children: <Widget>[
|
|
Positioned(left: 1000, right: 2000, child: SizedBox(width: 2000, height: 2000)),
|
|
],
|
|
),
|
|
);
|
|
final RenderStack renderObject = tester.allRenderObjects.whereType<RenderStack>().first;
|
|
expect(renderObject.clipBehavior, equals(Clip.hardEdge));
|
|
|
|
bool visited = false;
|
|
renderObject.visitChildren((RenderObject child) {
|
|
visited = true;
|
|
expect(
|
|
renderObject.describeApproximatePaintClip(child),
|
|
const Rect.fromLTRB(0.0, 0.0, 800.0, 600.0),
|
|
);
|
|
});
|
|
expect(visited, true);
|
|
visited = false;
|
|
renderObject.clipBehavior = Clip.none;
|
|
renderObject.visitChildren((RenderObject child) {
|
|
visited = true;
|
|
expect(renderObject.describeApproximatePaintClip(child), null);
|
|
});
|
|
expect(visited, true);
|
|
});
|
|
|
|
testWidgets('IndexedStack with null index', (WidgetTester tester) async {
|
|
bool? tapped;
|
|
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: IndexedStack(
|
|
index: null,
|
|
children: <Widget>[
|
|
GestureDetector(
|
|
behavior: HitTestBehavior.opaque,
|
|
onTap: () {
|
|
tapped = true;
|
|
},
|
|
child: const SizedBox(width: 200.0, height: 200.0),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
await tester.tap(find.byType(IndexedStack), warnIfMissed: false);
|
|
final RenderBox box = tester.renderObject(find.byType(IndexedStack));
|
|
expect(box.size, equals(const Size(200.0, 200.0)));
|
|
expect(tapped, isNull);
|
|
});
|
|
|
|
testWidgets('IndexedStack reports hidden children as offstage', (WidgetTester tester) async {
|
|
final List<Widget> children = <Widget>[for (int i = 0; i < 5; i++) Text('child $i')];
|
|
|
|
Future<void> pumpIndexedStack(int? activeIndex) async {
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: activeIndex, children: children),
|
|
),
|
|
);
|
|
}
|
|
|
|
final Finder finder = find.byType(Text);
|
|
final Finder finderIncludingOffstage = find.byType(Text, skipOffstage: false);
|
|
|
|
await pumpIndexedStack(null);
|
|
expect(finder, findsNothing); // IndexedStack with null index shows nothing
|
|
expect(finderIncludingOffstage, findsNWidgets(5));
|
|
|
|
for (int i = 0; i < 5; i++) {
|
|
await pumpIndexedStack(i);
|
|
|
|
expect(finder, findsOneWidget);
|
|
expect(finderIncludingOffstage, findsNWidgets(5));
|
|
|
|
expect(find.text('child $i'), findsOneWidget);
|
|
}
|
|
});
|
|
|
|
testWidgets('IndexedStack excludes focus for hidden children', (WidgetTester tester) async {
|
|
const List<Widget> children = <Widget>[
|
|
Focus(child: Text('child 0')),
|
|
Focus(child: Text('child 1')),
|
|
];
|
|
|
|
Future<void> pumpIndexedStack(int? activeIndex) async {
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: activeIndex, children: children),
|
|
),
|
|
);
|
|
}
|
|
|
|
Future<void> requestFocusAndPump(FocusNode node) async {
|
|
node.requestFocus();
|
|
await tester.pump();
|
|
}
|
|
|
|
await pumpIndexedStack(0);
|
|
|
|
final Element child0 = tester.element(find.text('child 0', skipOffstage: false));
|
|
final Element child1 = tester.element(find.text('child 1', skipOffstage: false));
|
|
final FocusNode child0FocusNode = Focus.of(child0);
|
|
final FocusNode child1FocusNode = Focus.of(child1);
|
|
|
|
await requestFocusAndPump(child0FocusNode);
|
|
|
|
expect(child0FocusNode.hasFocus, true);
|
|
expect(child1FocusNode.hasFocus, false);
|
|
|
|
await requestFocusAndPump(child1FocusNode);
|
|
|
|
expect(child0FocusNode.hasFocus, true);
|
|
expect(child1FocusNode.hasFocus, false);
|
|
|
|
await pumpIndexedStack(1);
|
|
await requestFocusAndPump(child1FocusNode);
|
|
|
|
expect(child0FocusNode.hasFocus, false);
|
|
expect(child1FocusNode.hasFocus, true);
|
|
|
|
await requestFocusAndPump(child0FocusNode);
|
|
|
|
expect(child0FocusNode.hasFocus, false);
|
|
expect(child1FocusNode.hasFocus, true);
|
|
});
|
|
|
|
testWidgets('IndexedStack: hidden children can not receive tap events', (
|
|
WidgetTester tester,
|
|
) async {
|
|
bool tapped = false;
|
|
final List<Widget> children = <Widget>[
|
|
const Text('child'),
|
|
GestureDetector(onTap: () => tapped = true, child: const Text('hiddenChild')),
|
|
];
|
|
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(children: children),
|
|
),
|
|
);
|
|
|
|
await tester.tap(find.text('hiddenChild', skipOffstage: false), warnIfMissed: false);
|
|
await tester.pump();
|
|
|
|
expect(tapped, false);
|
|
});
|
|
|
|
testWidgets('Stack clip test', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: Stack(
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(top: 0.0, left: 0.0, child: SizedBox(width: 200.0, height: 200.0)),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
RenderBox box = tester.renderObject(find.byType(Stack));
|
|
TestPaintingContext context = TestPaintingContext();
|
|
box.paint(context, Offset.zero);
|
|
expect(context.invocations.first.memberName, equals(#pushClipRect));
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: Stack(
|
|
clipBehavior: Clip.none,
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(top: 0.0, left: 0.0, child: SizedBox(width: 200.0, height: 200.0)),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
box = tester.renderObject(find.byType(Stack));
|
|
context = TestPaintingContext();
|
|
box.paint(context, Offset.zero);
|
|
expect(context.invocations.first.memberName, equals(#paintChild));
|
|
});
|
|
|
|
testWidgets('Stack sizing: default', (WidgetTester tester) async {
|
|
final List<String> logs = <String>[];
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: ConstrainedBox(
|
|
constraints: const BoxConstraints(
|
|
minWidth: 2.0,
|
|
maxWidth: 3.0,
|
|
minHeight: 5.0,
|
|
maxHeight: 7.0,
|
|
),
|
|
child: Stack(
|
|
children: <Widget>[
|
|
LayoutBuilder(
|
|
builder: (BuildContext context, BoxConstraints constraints) {
|
|
logs.add(constraints.toString());
|
|
return const Placeholder();
|
|
},
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
),
|
|
);
|
|
expect(logs, <String>['BoxConstraints(0.0<=w<=3.0, 0.0<=h<=7.0)']);
|
|
});
|
|
|
|
testWidgets('Stack sizing: explicit', (WidgetTester tester) async {
|
|
final List<String> logs = <String>[];
|
|
Widget buildStack(StackFit sizing) {
|
|
return Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: ConstrainedBox(
|
|
constraints: const BoxConstraints(
|
|
minWidth: 2.0,
|
|
maxWidth: 3.0,
|
|
minHeight: 5.0,
|
|
maxHeight: 7.0,
|
|
),
|
|
child: Stack(
|
|
fit: sizing,
|
|
children: <Widget>[
|
|
LayoutBuilder(
|
|
builder: (BuildContext context, BoxConstraints constraints) {
|
|
logs.add(constraints.toString());
|
|
return const Placeholder();
|
|
},
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
|
|
await tester.pumpWidget(buildStack(StackFit.loose));
|
|
logs.add('=1=');
|
|
await tester.pumpWidget(buildStack(StackFit.expand));
|
|
logs.add('=2=');
|
|
await tester.pumpWidget(buildStack(StackFit.passthrough));
|
|
expect(logs, <String>[
|
|
'BoxConstraints(0.0<=w<=3.0, 0.0<=h<=7.0)',
|
|
'=1=',
|
|
'BoxConstraints(w=3.0, h=7.0)',
|
|
'=2=',
|
|
'BoxConstraints(2.0<=w<=3.0, 5.0<=h<=7.0)',
|
|
]);
|
|
});
|
|
|
|
testWidgets('Positioned.directional control test', (WidgetTester tester) async {
|
|
final Key key = UniqueKey();
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Positioned.directional(
|
|
textDirection: TextDirection.rtl,
|
|
start: 50.0,
|
|
child: SizedBox(key: key, width: 75.0, height: 175.0),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(tester.getTopLeft(find.byKey(key)), const Offset(675.0, 0.0));
|
|
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
Positioned.directional(
|
|
textDirection: TextDirection.ltr,
|
|
start: 50.0,
|
|
child: SizedBox(key: key, width: 75.0, height: 175.0),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(tester.getTopLeft(find.byKey(key)), const Offset(50.0, 0.0));
|
|
});
|
|
|
|
testWidgets('PositionedDirectional control test', (WidgetTester tester) async {
|
|
final Key key = UniqueKey();
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.rtl,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
PositionedDirectional(
|
|
start: 50.0,
|
|
child: SizedBox(key: key, width: 75.0, height: 175.0),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(tester.getTopLeft(find.byKey(key)), const Offset(675.0, 0.0));
|
|
|
|
await tester.pumpWidget(
|
|
Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
children: <Widget>[
|
|
PositionedDirectional(
|
|
start: 50.0,
|
|
child: SizedBox(key: key, width: 75.0, height: 175.0),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
|
|
expect(tester.getTopLeft(find.byKey(key)), const Offset(50.0, 0.0));
|
|
});
|
|
|
|
testWidgets('Can change the text direction of a Stack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(const Stack(alignment: Alignment.center));
|
|
await tester.pumpWidget(const Stack(textDirection: TextDirection.rtl));
|
|
await tester.pumpWidget(const Stack(alignment: Alignment.center));
|
|
});
|
|
|
|
testWidgets('Alignment with partially-positioned children', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.rtl,
|
|
child: Stack(
|
|
alignment: Alignment.center,
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(left: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(right: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(start: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(end: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(0)),
|
|
const Rect.fromLTWH(350.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(1)),
|
|
const Rect.fromLTWH(0.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(2)),
|
|
const Rect.fromLTWH(700.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(3)),
|
|
const Rect.fromLTWH(350.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(4)),
|
|
const Rect.fromLTWH(350.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(5)),
|
|
const Rect.fromLTWH(700.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(6)),
|
|
const Rect.fromLTWH(0.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(7)),
|
|
const Rect.fromLTWH(350.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(8)),
|
|
const Rect.fromLTWH(350.0, 500.0, 100.0, 100.0),
|
|
);
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
alignment: Alignment.center,
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(left: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(right: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(start: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(end: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(0)),
|
|
const Rect.fromLTWH(350.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(1)),
|
|
const Rect.fromLTWH(0.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(2)),
|
|
const Rect.fromLTWH(700.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(3)),
|
|
const Rect.fromLTWH(350.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(4)),
|
|
const Rect.fromLTWH(350.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(5)),
|
|
const Rect.fromLTWH(0.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(6)),
|
|
const Rect.fromLTWH(700.0, 250.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(7)),
|
|
const Rect.fromLTWH(350.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(8)),
|
|
const Rect.fromLTWH(350.0, 500.0, 100.0, 100.0),
|
|
);
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
alignment: Alignment.bottomRight,
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(left: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(right: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(start: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(end: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(0)),
|
|
const Rect.fromLTWH(700.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(1)),
|
|
const Rect.fromLTWH(0.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(2)),
|
|
const Rect.fromLTWH(700.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(3)),
|
|
const Rect.fromLTWH(700.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(4)),
|
|
const Rect.fromLTWH(700.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(5)),
|
|
const Rect.fromLTWH(0.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(6)),
|
|
const Rect.fromLTWH(700.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(7)),
|
|
const Rect.fromLTWH(700.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(8)),
|
|
const Rect.fromLTWH(700.0, 500.0, 100.0, 100.0),
|
|
);
|
|
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Stack(
|
|
alignment: Alignment.topLeft,
|
|
children: <Widget>[
|
|
SizedBox(width: 100.0, height: 100.0),
|
|
Positioned(left: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(right: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
Positioned(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(start: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(end: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(top: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
PositionedDirectional(bottom: 0.0, child: SizedBox(width: 100.0, height: 100.0)),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(0)),
|
|
const Rect.fromLTWH(0.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(1)),
|
|
const Rect.fromLTWH(0.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(2)),
|
|
const Rect.fromLTWH(700.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(3)),
|
|
const Rect.fromLTWH(0.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(4)),
|
|
const Rect.fromLTWH(0.0, 500.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(5)),
|
|
const Rect.fromLTWH(0.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(6)),
|
|
const Rect.fromLTWH(700.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(7)),
|
|
const Rect.fromLTWH(0.0, 0.0, 100.0, 100.0),
|
|
);
|
|
expect(
|
|
tester.getRect(find.byType(SizedBox).at(8)),
|
|
const Rect.fromLTWH(0.0, 500.0, 100.0, 100.0),
|
|
);
|
|
});
|
|
|
|
testWidgets(
|
|
'Stack error messages',
|
|
experimentalLeakTesting: LeakTesting.settings
|
|
.withIgnoredAll(), // leaking by design because of exception
|
|
(WidgetTester tester) async {
|
|
await tester.pumpWidget(const Stack());
|
|
final String exception = tester.takeException().toString();
|
|
|
|
expect(
|
|
exception,
|
|
startsWith(
|
|
'No Directionality widget found.\n'
|
|
"Stack widgets require a Directionality widget ancestor to resolve the 'alignment' argument.\n"
|
|
"The default value for 'alignment' is AlignmentDirectional.topStart, which requires a text direction.\n"
|
|
'The specific widget that could not find a Directionality ancestor was:\n'
|
|
' Stack\n'
|
|
'The ownership chain for the affected widget is: "Stack ← ', // Omitted full ownership chain because it is not relevant for the test.
|
|
),
|
|
);
|
|
expect(
|
|
exception,
|
|
endsWith(
|
|
'_ViewScope ← ⋯"\n' // End of ownership chain.
|
|
'Typically, the Directionality widget is introduced by the MaterialApp or WidgetsApp widget at the '
|
|
'top of your application widget tree. It determines the ambient reading direction and is used, for '
|
|
'example, to determine how to lay out text, how to interpret "start" and "end" values, and to resolve '
|
|
'EdgeInsetsDirectional, AlignmentDirectional, and other *Directional objects.\n'
|
|
'Instead of providing a Directionality widget, another solution would be passing a non-directional '
|
|
"'alignment', or an explicit 'textDirection', to the Stack.",
|
|
),
|
|
);
|
|
},
|
|
);
|
|
|
|
testWidgets('Can update clipBehavior of IndexedStack', (WidgetTester tester) async {
|
|
await tester.pumpWidget(const IndexedStack(textDirection: TextDirection.ltr));
|
|
final RenderIndexedStack renderObject = tester.renderObject<RenderIndexedStack>(
|
|
find.byType(IndexedStack),
|
|
);
|
|
expect(renderObject.clipBehavior, equals(Clip.hardEdge));
|
|
|
|
// Update clipBehavior to Clip.antiAlias
|
|
|
|
await tester.pumpWidget(
|
|
const IndexedStack(textDirection: TextDirection.ltr, clipBehavior: Clip.antiAlias),
|
|
);
|
|
final RenderIndexedStack renderIndexedObject = tester.renderObject<RenderIndexedStack>(
|
|
find.byType(IndexedStack),
|
|
);
|
|
expect(renderIndexedObject.clipBehavior, equals(Clip.antiAlias));
|
|
});
|
|
|
|
testWidgets('IndexedStack sizing: explicit', (WidgetTester tester) async {
|
|
final List<String> logs = <String>[];
|
|
Widget buildIndexedStack(StackFit sizing) {
|
|
return Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: Center(
|
|
child: ConstrainedBox(
|
|
constraints: const BoxConstraints(
|
|
minWidth: 2.0,
|
|
maxWidth: 3.0,
|
|
minHeight: 5.0,
|
|
maxHeight: 7.0,
|
|
),
|
|
child: IndexedStack(
|
|
sizing: sizing,
|
|
children: <Widget>[
|
|
LayoutBuilder(
|
|
builder: (BuildContext context, BoxConstraints constraints) {
|
|
logs.add(constraints.toString());
|
|
return const Placeholder();
|
|
},
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
|
|
await tester.pumpWidget(buildIndexedStack(StackFit.loose));
|
|
logs.add('=1=');
|
|
await tester.pumpWidget(buildIndexedStack(StackFit.expand));
|
|
logs.add('=2=');
|
|
await tester.pumpWidget(buildIndexedStack(StackFit.passthrough));
|
|
expect(logs, <String>[
|
|
'BoxConstraints(0.0<=w<=3.0, 0.0<=h<=7.0)',
|
|
'=1=',
|
|
'BoxConstraints(w=3.0, h=7.0)',
|
|
'=2=',
|
|
'BoxConstraints(2.0<=w<=3.0, 5.0<=h<=7.0)',
|
|
]);
|
|
});
|
|
|
|
testWidgets('IndexedStack does not assert with the default parameters', (
|
|
WidgetTester tester,
|
|
) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(textDirection: TextDirection.ltr, child: IndexedStack()),
|
|
);
|
|
|
|
expect(tester.takeException(), isNull);
|
|
});
|
|
|
|
testWidgets('IndexedStack does not assert when index is null', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: null, children: <Widget>[SizedBox.shrink(), SizedBox.shrink()]),
|
|
),
|
|
);
|
|
|
|
expect(tester.takeException(), isNull);
|
|
});
|
|
|
|
testWidgets('IndexedStack asserts when index is negative', (WidgetTester tester) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: -1, children: <Widget>[SizedBox.shrink(), SizedBox.shrink()]),
|
|
),
|
|
);
|
|
|
|
expect(tester.takeException(), isA<AssertionError>());
|
|
});
|
|
|
|
testWidgets('IndexedStack asserts when index is not in children range', (
|
|
WidgetTester tester,
|
|
) async {
|
|
await tester.pumpWidget(
|
|
const Directionality(
|
|
textDirection: TextDirection.ltr,
|
|
child: IndexedStack(index: 2, children: <Widget>[SizedBox.shrink(), SizedBox.shrink()]),
|
|
),
|
|
);
|
|
|
|
expect(tester.takeException(), isA<AssertionError>());
|
|
});
|
|
}
|
|
|
|
class _ShowVisibility extends StatelessWidget {
|
|
const _ShowVisibility({required this.index});
|
|
|
|
final int index;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Text('index $index is visible ? ${Visibility.of(context)}');
|
|
}
|
|
}
|