| // 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_test/flutter_test.dart'; |
| import 'package:flutter/material.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter/rendering.dart'; |
| |
| import '../rendering/mock_canvas.dart'; |
| import 'semantics_tester.dart'; |
| |
| Future<void> test(WidgetTester tester, double offset, { double anchor = 0.0 }) { |
| return tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| anchor: anchor / 600.0, |
| offset: ViewportOffset.fixed(offset), |
| slivers: const <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 400.0)), |
| SliverToBoxAdapter(child: SizedBox(height: 400.0)), |
| SliverToBoxAdapter(child: SizedBox(height: 400.0)), |
| SliverToBoxAdapter(child: SizedBox(height: 400.0)), |
| SliverToBoxAdapter(child: SizedBox(height: 400.0)), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| Future<void> testSliverFixedExtentList(WidgetTester tester, List<String> items) { |
| return tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverFixedExtentList( |
| itemExtent: 900, |
| delegate: SliverChildBuilderDelegate( |
| (BuildContext context, int index) { |
| return Center( |
| key: ValueKey<String>(items[index]), |
| child: KeepAlive( |
| items[index], |
| ), |
| ); |
| }, |
| childCount : items.length, |
| findChildIndexCallback: (Key key) { |
| final ValueKey<String> valueKey = key as ValueKey<String>; |
| final String data = valueKey.value; |
| final int index = items.indexOf(data); |
| return index == -1 ? null : index; |
| }, |
| ), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| void verify(WidgetTester tester, List<Offset> idealPositions, List<bool> idealVisibles) { |
| final List<Offset> actualPositions = tester.renderObjectList<RenderBox>(find.byType(SizedBox, skipOffstage: false)).map<Offset>( |
| (RenderBox target) => target.localToGlobal(const Offset(0.0, 0.0)) |
| ).toList(); |
| final List<bool> actualVisibles = tester.renderObjectList<RenderSliverToBoxAdapter>(find.byType(SliverToBoxAdapter, skipOffstage: false)).map<bool>( |
| (RenderSliverToBoxAdapter target) => target.geometry.visible |
| ).toList(); |
| expect(actualPositions, equals(idealPositions)); |
| expect(actualVisibles, equals(idealVisibles)); |
| } |
| |
| void main() { |
| testWidgets('Viewport basic test', (WidgetTester tester) async { |
| await test(tester, 0.0); |
| expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size, equals(const Size(800.0, 600.0))); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 400.0), |
| const Offset(0.0, 800.0), |
| const Offset(0.0, 1200.0), |
| const Offset(0.0, 1600.0), |
| ], <bool>[true, true, false, false, false]); |
| |
| await test(tester, 200.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| const Offset(0.0, 600.0), |
| const Offset(0.0, 1000.0), |
| const Offset(0.0, 1400.0), |
| ], <bool>[true, true, false, false, false]); |
| |
| await test(tester, 600.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -600.0), |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| const Offset(0.0, 600.0), |
| const Offset(0.0, 1000.0), |
| ], <bool>[false, true, true, false, false]); |
| |
| await test(tester, 900.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -900.0), |
| const Offset(0.0, -500.0), |
| const Offset(0.0, -100.0), |
| const Offset(0.0, 300.0), |
| const Offset(0.0, 700.0), |
| ], <bool>[false, false, true, true, false]); |
| }); |
| |
| testWidgets('Viewport anchor test', (WidgetTester tester) async { |
| await test(tester, 0.0, anchor: 100.0); |
| expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size, equals(const Size(800.0, 600.0))); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 100.0), |
| const Offset(0.0, 500.0), |
| const Offset(0.0, 900.0), |
| const Offset(0.0, 1300.0), |
| const Offset(0.0, 1700.0), |
| ], <bool>[true, true, false, false, false]); |
| |
| await test(tester, 200.0, anchor: 100.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -100.0), |
| const Offset(0.0, 300.0), |
| const Offset(0.0, 700.0), |
| const Offset(0.0, 1100.0), |
| const Offset(0.0, 1500.0), |
| ], <bool>[true, true, false, false, false]); |
| |
| await test(tester, 600.0, anchor: 100.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -500.0), |
| const Offset(0.0, -100.0), |
| const Offset(0.0, 300.0), |
| const Offset(0.0, 700.0), |
| const Offset(0.0, 1100.0), |
| ], <bool>[false, true, true, false, false]); |
| |
| await test(tester, 900.0, anchor: 100.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -800.0), |
| const Offset(0.0, -400.0), |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 400.0), |
| const Offset(0.0, 800.0), |
| ], <bool>[false, false, true, true, false]); |
| }); |
| |
| testWidgets('Multiple grids and lists', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| Center( |
| child: SizedBox( |
| width: 44.4, |
| height: 60.0, |
| child: Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate( |
| <Widget>[ |
| Container(height: 22.2, child: const Text('TOP')), |
| Container(height: 22.2), |
| Container(height: 22.2), |
| ], |
| ), |
| ), |
| SliverFixedExtentList( |
| itemExtent: 22.2, |
| delegate: SliverChildListDelegate( |
| <Widget>[ |
| Container(), |
| Container(child: const Text('A')), |
| Container(), |
| ], |
| ), |
| ), |
| SliverGrid( |
| gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount( |
| crossAxisCount: 2, |
| ), |
| delegate: SliverChildListDelegate( |
| <Widget>[ |
| Container(), |
| Container(child: const Text('B')), |
| Container(), |
| ], |
| ), |
| ), |
| SliverList( |
| delegate: SliverChildListDelegate( |
| <Widget>[ |
| Container(height: 22.2), |
| Container(height: 22.2), |
| Container(height: 22.2, child: const Text('BOTTOM')), |
| ], |
| ), |
| ), |
| ], |
| ), |
| ), |
| ), |
| ), |
| ); |
| final TestGesture gesture = await tester.startGesture(const Offset(400.0, 300.0)); |
| expect(find.text('TOP'), findsOneWidget); |
| expect(find.text('A'), findsNothing); |
| expect(find.text('B'), findsNothing); |
| expect(find.text('BOTTOM'), findsNothing); |
| await gesture.moveBy(const Offset(0.0, -70.0)); |
| await tester.pump(); |
| expect(find.text('TOP'), findsNothing); |
| expect(find.text('A'), findsOneWidget); |
| expect(find.text('B'), findsNothing); |
| expect(find.text('BOTTOM'), findsNothing); |
| await gesture.moveBy(const Offset(0.0, -70.0)); |
| await tester.pump(); |
| expect(find.text('TOP'), findsNothing); |
| expect(find.text('A'), findsNothing); |
| expect(find.text('B'), findsOneWidget); |
| expect(find.text('BOTTOM'), findsNothing); |
| await gesture.moveBy(const Offset(0.0, -70.0)); |
| await tester.pump(); |
| expect(find.text('TOP'), findsNothing); |
| expect(find.text('A'), findsNothing); |
| expect(find.text('B'), findsNothing); |
| expect(find.text('BOTTOM'), findsOneWidget); |
| }); |
| |
| testWidgets('SliverFixedExtentList correctly clears garbage', (WidgetTester tester) async { |
| final List<String> items = <String>['1', '2', '3', '4', '5', '6']; |
| await testSliverFixedExtentList(tester, items); |
| // Keep alive widgets require 1 frame to notify their parents. Pumps in between |
| // drags to ensure widgets are kept alive. |
| await tester.drag(find.byType(CustomScrollView),const Offset(0.0, -1200.0)); |
| await tester.pump(); |
| await tester.drag(find.byType(CustomScrollView),const Offset(0.0, -1200.0)); |
| await tester.pump(); |
| await tester.drag(find.byType(CustomScrollView),const Offset(0.0, -800.0)); |
| await tester.pump(); |
| expect(find.text('1'), findsNothing); |
| expect(find.text('2'), findsNothing); |
| expect(find.text('3'), findsNothing); |
| expect(find.text('4'), findsOneWidget); |
| expect(find.text('5'), findsOneWidget); |
| // Indexes [0, 1, 2] are kept alive and [3, 4] are in viewport, thus the sliver |
| // will need to keep updating the elements at these indexes whenever a rebuild is |
| // triggered. The current child list in RenderSliverFixedExtentList is |
| // '4' -> '5' -> null. |
| // |
| // With the insertion below, all items will get shifted back 1 position. The sliver |
| // will have to update indexes [0, 1, 2, 3, 4, 5]. Since this is the first time |
| // item '0' gets initialized, mounting the element will cause it to attach to |
| // child list in RenderSliverFixedExtentList. This will create a gap. |
| // '0' -> '4' -> '5' -> null. |
| items.insert(0, '0'); |
| await testSliverFixedExtentList(tester, items); |
| // Sliver should collect leading and trailing garbage correctly. |
| // |
| // The child list update should occur in following order. |
| // '0' -> '4' -> '5' -> null Started with Original list. |
| // '4' -> null Removed 1 leading garbage and 1 trailing garbage. |
| // '3' -> '4' -> null Prepended '3' because viewport is still at [3, 4]. |
| expect(find.text('0'), findsNothing); |
| expect(find.text('1'), findsNothing); |
| expect(find.text('2'), findsNothing); |
| expect(find.text('3'), findsOneWidget); |
| expect(find.text('4'), findsOneWidget); |
| }); |
| |
| testWidgets( |
| 'SliverGrid Correctly layout children after rearranging', |
| (WidgetTester tester) async { |
| await tester.pumpWidget(const TestSliverGrid( |
| <Widget>[ |
| Text('item0', key: Key('0')), |
| Text('item1', key: Key('1')), |
| ], |
| )); |
| await tester.pumpWidget(const TestSliverGrid( |
| <Widget>[ |
| Text('item0', key: Key('0')), |
| Text('item3', key: Key('3')), |
| Text('item4', key: Key('4')), |
| Text('item1', key: Key('1')), |
| ], |
| )); |
| expect(find.text('item0'), findsOneWidget); |
| expect(find.text('item3'), findsOneWidget); |
| expect(find.text('item4'), findsOneWidget); |
| expect(find.text('item1'), findsOneWidget); |
| |
| final Offset item0Location = tester.getCenter(find.text('item0')); |
| final Offset item3Location = tester.getCenter(find.text('item3')); |
| final Offset item4Location = tester.getCenter(find.text('item4')); |
| final Offset item1Location = tester.getCenter(find.text('item1')); |
| |
| expect(isRight(item0Location, item3Location) && sameHorizontal(item0Location, item3Location), true); |
| expect(isBelow(item0Location, item4Location) && sameVertical(item0Location, item4Location), true); |
| expect(isBelow(item0Location, item1Location) && isRight(item0Location, item1Location), true); |
| }, |
| ); |
| |
| testWidgets( |
| 'SliverFixedExtentList Correctly layout children after rearranging', |
| (WidgetTester tester) async { |
| await tester.pumpWidget(const TestSliverFixedExtentList( |
| <Widget>[ |
| Text('item0', key: Key('0')), |
| Text('item2', key: Key('2')), |
| Text('item1', key: Key('1')), |
| ], |
| )); |
| await tester.pumpWidget(const TestSliverFixedExtentList( |
| <Widget>[ |
| Text('item0', key: Key('0')), |
| Text('item3', key: Key('3')), |
| Text('item1', key: Key('1')), |
| Text('item4', key: Key('4')), |
| Text('item2', key: Key('2')), |
| ], |
| )); |
| expect(find.text('item0'), findsOneWidget); |
| expect(find.text('item3'), findsOneWidget); |
| expect(find.text('item1'), findsOneWidget); |
| expect(find.text('item4'), findsOneWidget); |
| expect(find.text('item2'), findsOneWidget); |
| |
| final Offset item0Location = tester.getCenter(find.text('item0')); |
| final Offset item3Location = tester.getCenter(find.text('item3')); |
| final Offset item1Location = tester.getCenter(find.text('item1')); |
| final Offset item4Location = tester.getCenter(find.text('item4')); |
| final Offset item2Location = tester.getCenter(find.text('item2')); |
| |
| expect(isBelow(item0Location, item3Location) && sameVertical(item0Location, item3Location), true); |
| expect(isBelow(item3Location, item1Location) && sameVertical(item3Location, item1Location), true); |
| expect(isBelow(item1Location, item4Location) && sameVertical(item1Location, item4Location), true); |
| expect(isBelow(item4Location, item2Location) && sameVertical(item4Location, item2Location), true); |
| }, |
| ); |
| |
| testWidgets('Can override ErrorWidget.build', (WidgetTester tester) async { |
| const Text errorText = Text('error'); |
| final ErrorWidgetBuilder oldBuilder = ErrorWidget.builder; |
| ErrorWidget.builder = (FlutterErrorDetails details) => errorText; |
| final SliverChildBuilderDelegate builderThrowsDelegate = SliverChildBuilderDelegate( |
| (_, __) => throw 'builder', |
| addAutomaticKeepAlives: false, |
| addRepaintBoundaries: false, |
| addSemanticIndexes: false, |
| ); |
| final KeyedSubtree wrapped = builderThrowsDelegate.build(null, 0) as KeyedSubtree; |
| expect(wrapped.child, errorText); |
| expect(tester.takeException(), 'builder'); |
| ErrorWidget.builder = oldBuilder; |
| }); |
| |
| testWidgets('SliverFixedExtentList with SliverChildBuilderDelegate auto-correct scroll offset - super fast', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(initialScrollOffset: 600); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| controller: controller, |
| cacheExtent: 0, |
| slivers: <Widget>[ |
| SliverFixedExtentList( |
| itemExtent: 200, |
| delegate: SliverChildBuilderDelegate( |
| (BuildContext context, int index) { |
| if (index <= 6) { |
| return Center(child: Text('Page $index')); |
| } |
| return null; |
| }, |
| ), |
| ), |
| ], |
| ), |
| ), |
| ); |
| await tester.drag(find.text('Page 5'), const Offset(0, -1000)); |
| // Controller will be temporarily over-scrolled. |
| expect(controller.offset, 1600.0); |
| await tester.pumpAndSettle(); |
| // It will be corrected after a auto scroll animation. |
| expect(controller.offset, 800.0); |
| }); |
| |
| testWidgets('SliverFixedExtentList with SliverChildBuilderDelegate auto-correct scroll offset - reasonable', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(initialScrollOffset: 600); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| controller: controller, |
| cacheExtent: 0, |
| slivers: <Widget>[ |
| SliverFixedExtentList( |
| itemExtent: 200, |
| delegate: SliverChildBuilderDelegate( |
| (BuildContext context, int index) { |
| if (index <= 6) { |
| return Center(child: Text('Page $index')); |
| } |
| return null; |
| }, |
| ), |
| ), |
| ], |
| ), |
| ), |
| ); |
| await tester.drag(find.text('Page 5'), const Offset(0, -210)); |
| // Controller will be temporarily over-scrolled. |
| expect(controller.offset, 810.0); |
| await tester.pumpAndSettle(); |
| // It will be corrected after a auto scroll animation. |
| expect(controller.offset, 800.0); |
| }); |
| |
| Widget _boilerPlate(Widget sliver) { |
| return Localizations( |
| locale: const Locale('en', 'us'), |
| delegates: const <LocalizationsDelegate<dynamic>>[ |
| DefaultWidgetsLocalizations.delegate, |
| DefaultMaterialLocalizations.delegate, |
| ], |
| child: Directionality( |
| textDirection: TextDirection.ltr, |
| child: MediaQuery( |
| data: const MediaQueryData(), |
| child: CustomScrollView(slivers: <Widget>[sliver]) |
| ) |
| ) |
| ); |
| } |
| |
| group('SliverOffstage - ', () { |
| testWidgets('offstage true', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOffstage( |
| offstage: true, |
| sliver: SliverToBoxAdapter( |
| child: Text('a'), |
| ) |
| ) |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(0)); |
| expect(find.byType(Text), findsNothing); |
| final RenderViewport renderViewport = tester.renderObject(find.byType(Viewport)); |
| final RenderSliver renderSliver = renderViewport.lastChild; |
| expect(renderSliver.geometry.scrollExtent, 0.0); |
| expect(find.byType(SliverOffstage), findsNothing); |
| }); |
| |
| testWidgets('offstage false', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOffstage( |
| offstage: false, |
| sliver: SliverToBoxAdapter( |
| child: Text('a'), |
| ) |
| ) |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(Text), findsOneWidget); |
| final RenderViewport renderViewport = tester.renderObject(find.byType(Viewport)); |
| final RenderSliver renderSliver = renderViewport.lastChild; |
| expect(renderSliver.geometry.scrollExtent, 14.0); |
| expect(find.byType(SliverOffstage), paints..paragraph()); |
| }); |
| }); |
| |
| group('SliverOpacity - ', () { |
| testWidgets('painting & semantics', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| |
| // Opacity 1.0: Semantics and painting |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 1.0, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(SliverOpacity), paints..paragraph()); |
| |
| // Opacity 0.0: Nothing |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.0, |
| ) |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(0)); |
| expect(find.byType(SliverOpacity), paintsNothing); |
| |
| // Opacity 0.0 with semantics: Just semantics |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.0, |
| alwaysIncludeSemantics: true, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(SliverOpacity), paintsNothing); |
| |
| // Opacity 0.0 without semantics: Nothing |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.0, |
| alwaysIncludeSemantics: false, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(0)); |
| expect(find.byType(SliverOpacity), paintsNothing); |
| |
| // Opacity 0.1: Semantics and painting |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.1, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(SliverOpacity), paints..paragraph()); |
| |
| // Opacity 0.1 without semantics: Still has semantics and painting |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.1, |
| alwaysIncludeSemantics: false, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(SliverOpacity), paints..paragraph()); |
| |
| // Opacity 0.1 with semantics: Semantics and painting |
| await tester.pumpWidget(_boilerPlate( |
| const SliverOpacity( |
| sliver: SliverToBoxAdapter( |
| child: Text( |
| 'a', |
| textDirection: TextDirection.rtl, |
| ) |
| ), |
| opacity: 0.1, |
| alwaysIncludeSemantics: true, |
| ), |
| )); |
| |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| expect(find.byType(SliverOpacity), paints..paragraph()); |
| |
| semantics.dispose(); |
| }); |
| }); |
| |
| group('SliverIgnorePointer - ', () { |
| testWidgets('ignores pointer events', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| final List<String> events = <String>[]; |
| await tester.pumpWidget(_boilerPlate( |
| SliverIgnorePointer( |
| ignoring: true, |
| ignoringSemantics: false, |
| sliver: SliverToBoxAdapter( |
| child: GestureDetector( |
| child: const Text('a'), |
| onTap: () { |
| events.add('tap'); |
| }, |
| ) |
| ) |
| ) |
| )); |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| await tester.tap(find.byType(GestureDetector)); |
| expect(events, equals(<String>[])); |
| }); |
| |
| testWidgets('ignores semantics', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| final List<String> events = <String>[]; |
| await tester.pumpWidget(_boilerPlate( |
| SliverIgnorePointer( |
| ignoring: false, |
| ignoringSemantics: true, |
| sliver: SliverToBoxAdapter( |
| child: GestureDetector( |
| child: const Text('a'), |
| onTap: () { |
| events.add('tap'); |
| }, |
| ) |
| ) |
| ) |
| )); |
| expect(semantics.nodesWith(label: 'a'), hasLength(0)); |
| await tester.tap(find.byType(GestureDetector)); |
| expect(events, equals(<String>['tap'])); |
| }); |
| |
| testWidgets('ignores pointer events & semantics', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| final List<String> events = <String>[]; |
| await tester.pumpWidget(_boilerPlate( |
| SliverIgnorePointer( |
| ignoring: true, |
| ignoringSemantics: true, |
| sliver: SliverToBoxAdapter( |
| child: GestureDetector( |
| child: const Text('a'), |
| onTap: () { |
| events.add('tap'); |
| }, |
| ) |
| ) |
| ) |
| )); |
| expect(semantics.nodesWith(label: 'a'), hasLength(0)); |
| await tester.tap(find.byType(GestureDetector)); |
| expect(events, equals(<String>[])); |
| }); |
| |
| testWidgets('ignores nothing', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| final List<String> events = <String>[]; |
| await tester.pumpWidget(_boilerPlate( |
| SliverIgnorePointer( |
| ignoring: false, |
| ignoringSemantics: false, |
| sliver: SliverToBoxAdapter( |
| child: GestureDetector( |
| child: const Text('a'), |
| onTap: () { |
| events.add('tap'); |
| }, |
| ) |
| ) |
| ) |
| )); |
| expect(semantics.nodesWith(label: 'a'), hasLength(1)); |
| await tester.tap(find.byType(GestureDetector)); |
| expect(events, equals(<String>['tap'])); |
| }); |
| }); |
| } |
| |
| bool isRight(Offset a, Offset b) => b.dx > a.dx; |
| bool isBelow(Offset a, Offset b) => b.dy > a.dy; |
| bool sameHorizontal(Offset a, Offset b) => b.dy == a.dy; |
| bool sameVertical(Offset a, Offset b) => b.dx == a.dx; |
| |
| class TestSliverGrid extends StatelessWidget { |
| const TestSliverGrid(this.children, { Key key }) : super(key: key); |
| |
| final List<Widget> children; |
| |
| @override |
| Widget build(BuildContext context) { |
| return Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget> [ |
| SliverGrid( |
| delegate: SliverChildListDelegate( |
| children, |
| ), |
| gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount( |
| crossAxisCount: 2, |
| ), |
| ), |
| ], |
| ), |
| ); |
| } |
| } |
| |
| class TestSliverFixedExtentList extends StatelessWidget { |
| const TestSliverFixedExtentList(this.children, { Key key }) : super(key: key); |
| |
| final List<Widget> children; |
| |
| @override |
| Widget build(BuildContext context) { |
| return Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget> [ |
| SliverFixedExtentList( |
| itemExtent: 10.0, |
| delegate: SliverChildListDelegate( |
| children, |
| ), |
| ), |
| ], |
| ), |
| ); |
| } |
| } |
| |
| class KeepAlive extends StatefulWidget { |
| const KeepAlive(this.data, { Key key }) : super(key: key); |
| |
| final String data; |
| |
| @override |
| KeepAliveState createState() => KeepAliveState(); |
| } |
| |
| class KeepAliveState extends State<KeepAlive> with AutomaticKeepAliveClientMixin { |
| @override |
| bool get wantKeepAlive => true; |
| |
| @override |
| Widget build(BuildContext context) { |
| super.build(context); |
| return Text(widget.data); |
| } |
| } |
