| // 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 'dart:ui'; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/rendering.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| import 'semantics_tester.dart'; |
| |
| class TestScrollPosition extends ScrollPositionWithSingleContext { |
| TestScrollPosition({ |
| ScrollPhysics physics, |
| ScrollContext state, |
| double initialPixels = 0.0, |
| ScrollPosition oldPosition, |
| }) : super( |
| physics: physics, |
| context: state, |
| initialPixels: initialPixels, |
| oldPosition: oldPosition, |
| ); |
| } |
| |
| class TestScrollController extends ScrollController { |
| @override |
| ScrollPosition createScrollPosition(ScrollPhysics physics, ScrollContext context, ScrollPosition oldPosition) { |
| return TestScrollPosition( |
| physics: physics, |
| state: context, |
| initialPixels: initialScrollOffset, |
| oldPosition: oldPosition, |
| ); |
| } |
| } |
| |
| void main() { |
| testWidgets('SingleChildScrollView control test', (WidgetTester tester) async { |
| await tester.pumpWidget(SingleChildScrollView( |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| )); |
| |
| final RenderBox box = tester.renderObject(find.byType(Container)); |
| expect(box.localToGlobal(Offset.zero), equals(Offset.zero)); |
| |
| await tester.drag(find.byType(SingleChildScrollView), const Offset(-200.0, -200.0)); |
| |
| expect(box.localToGlobal(Offset.zero), equals(const Offset(0.0, -200.0))); |
| }); |
| |
| testWidgets('Changing controllers changes scroll position', (WidgetTester tester) async { |
| final TestScrollController controller = TestScrollController(); |
| |
| await tester.pumpWidget(SingleChildScrollView( |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| )); |
| |
| await tester.pumpWidget(SingleChildScrollView( |
| controller: controller, |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| )); |
| |
| final ScrollableState scrollable = tester.state(find.byType(Scrollable)); |
| expect(scrollable.position, isA<TestScrollPosition>()); |
| }); |
| |
| testWidgets('Sets PrimaryScrollController when primary', (WidgetTester tester) async { |
| final ScrollController primaryScrollController = ScrollController(); |
| await tester.pumpWidget(PrimaryScrollController( |
| controller: primaryScrollController, |
| child: SingleChildScrollView( |
| primary: true, |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| ), |
| )); |
| |
| final Scrollable scrollable = tester.widget(find.byType(Scrollable)); |
| expect(scrollable.controller, primaryScrollController); |
| }); |
| |
| |
| testWidgets('Changing scroll controller inside dirty layout builder does not assert', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| |
| await tester.pumpWidget(Center( |
| child: SizedBox( |
| width: 750.0, |
| child: LayoutBuilder( |
| builder: (BuildContext context, BoxConstraints constraints) { |
| return SingleChildScrollView( |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| ); |
| }, |
| ), |
| ), |
| )); |
| |
| await tester.pumpWidget(Center( |
| child: SizedBox( |
| width: 700.0, |
| child: LayoutBuilder( |
| builder: (BuildContext context, BoxConstraints constraints) { |
| return SingleChildScrollView( |
| controller: controller, |
| child: Container( |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| ); |
| }, |
| ), |
| ), |
| )); |
| }); |
| |
| testWidgets('Vertical SingleChildScrollViews are primary by default', (WidgetTester tester) async { |
| const SingleChildScrollView view = SingleChildScrollView(scrollDirection: Axis.vertical); |
| expect(view.primary, isTrue); |
| }); |
| |
| testWidgets('Horizontal SingleChildScrollViews are non-primary by default', (WidgetTester tester) async { |
| const SingleChildScrollView view = SingleChildScrollView(scrollDirection: Axis.horizontal); |
| expect(view.primary, isFalse); |
| }); |
| |
| testWidgets('SingleChildScrollViews with controllers are non-primary by default', (WidgetTester tester) async { |
| final SingleChildScrollView view = SingleChildScrollView( |
| controller: ScrollController(), |
| scrollDirection: Axis.vertical, |
| ); |
| expect(view.primary, isFalse); |
| }); |
| |
| testWidgets('Nested scrollables have a null PrimaryScrollController', (WidgetTester tester) async { |
| const Key innerKey = Key('inner'); |
| final ScrollController primaryScrollController = ScrollController(); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: PrimaryScrollController( |
| controller: primaryScrollController, |
| child: SingleChildScrollView( |
| primary: true, |
| child: Container( |
| constraints: const BoxConstraints(maxHeight: 200.0), |
| child: ListView(key: innerKey, primary: true), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final Scrollable innerScrollable = tester.widget( |
| find.descendant( |
| of: find.byKey(innerKey), |
| matching: find.byType(Scrollable), |
| ), |
| ); |
| expect(innerScrollable.controller, isNull); |
| }); |
| |
| testWidgets('SingleChildScrollView semantics', (WidgetTester tester) async { |
| final SemanticsTester semantics = SemanticsTester(tester); |
| final ScrollController controller = ScrollController(); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: SingleChildScrollView( |
| controller: controller, |
| child: Column( |
| children: List<Widget>.generate(30, (int i) { |
| return Container( |
| height: 200.0, |
| child: Text('Tile $i'), |
| ); |
| }), |
| ), |
| ), |
| ), |
| ); |
| |
| expect(semantics, hasSemantics( |
| TestSemantics( |
| children: <TestSemantics>[ |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.hasImplicitScrolling, |
| ], |
| actions: <SemanticsAction>[ |
| SemanticsAction.scrollUp, |
| ], |
| children: <TestSemantics>[ |
| TestSemantics( |
| label: r'Tile 0', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 1', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 2', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 3', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden,], |
| label: r'Tile 4', |
| textDirection: TextDirection.ltr, |
| ), |
| ], |
| ), |
| ], |
| ), |
| ignoreRect: true, ignoreTransform: true, ignoreId: true, |
| )); |
| |
| controller.jumpTo(3000.0); |
| await tester.pumpAndSettle(); |
| |
| expect(semantics, hasSemantics( |
| TestSemantics( |
| children: <TestSemantics>[ |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.hasImplicitScrolling, |
| ], |
| actions: <SemanticsAction>[ |
| SemanticsAction.scrollUp, |
| SemanticsAction.scrollDown, |
| ], |
| children: <TestSemantics>[ |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 13', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 14', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 15', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 16', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 17', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 18', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 19', |
| textDirection: TextDirection.ltr, |
| ), |
| ], |
| ), |
| ], |
| ), |
| ignoreRect: true, ignoreTransform: true, ignoreId: true, |
| )); |
| |
| controller.jumpTo(6000.0); |
| await tester.pumpAndSettle(); |
| |
| expect(semantics, hasSemantics( |
| TestSemantics( |
| children: <TestSemantics>[ |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.hasImplicitScrolling, |
| ], |
| actions: <SemanticsAction>[ |
| SemanticsAction.scrollDown, |
| ], |
| children: <TestSemantics>[ |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 25', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| flags: <SemanticsFlag>[ |
| SemanticsFlag.isHidden, |
| ], |
| label: r'Tile 26', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 27', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 28', |
| textDirection: TextDirection.ltr, |
| ), |
| TestSemantics( |
| label: r'Tile 29', |
| textDirection: TextDirection.ltr, |
| ), |
| ], |
| ), |
| ], |
| ), |
| ignoreRect: true, ignoreTransform: true, ignoreId: true, |
| )); |
| |
| semantics.dispose(); |
| }); |
| |
| testWidgets('SingleChildScrollView getOffsetToReveal - down', (WidgetTester tester) async { |
| List<Widget> children; |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 200.0, |
| width: 300.0, |
| child: SingleChildScrollView( |
| controller: ScrollController(initialScrollOffset: 300.0), |
| child: Column( |
| children: children = List<Widget>.generate(20, (int i) { |
| return Container( |
| height: 100.0, |
| width: 300.0, |
| child: Text('Tile $i'), |
| ); |
| }), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final RenderAbstractViewport viewport = tester.allRenderObjects.whereType<RenderAbstractViewport>().first; |
| |
| final RenderObject target = tester.renderObject(find.byWidget(children[5])); |
| RevealedOffset revealed = viewport.getOffsetToReveal(target, 0.0); |
| expect(revealed.offset, 500.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 0.0, 300.0, 100.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0); |
| expect(revealed.offset, 400.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 100.0, 300.0, 100.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 0.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 540.0); |
| expect(revealed.rect, const Rect.fromLTWH(40.0, 0.0, 10.0, 10.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 350.0); |
| expect(revealed.rect, const Rect.fromLTWH(40.0, 190.0, 10.0, 10.0)); |
| }); |
| |
| testWidgets('SingleChildScrollView getOffsetToReveal - up', (WidgetTester tester) async { |
| final List<Widget> children = List<Widget>.generate(20, (int i) { |
| return Container( |
| height: 100.0, |
| width: 300.0, |
| child: Text('Tile $i'), |
| ); |
| }); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 200.0, |
| width: 300.0, |
| child: SingleChildScrollView( |
| controller: ScrollController(initialScrollOffset: 300.0), |
| reverse: true, |
| child: Column( |
| children: children.reversed.toList(), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final RenderAbstractViewport viewport = tester.allRenderObjects.whereType<RenderAbstractViewport>().first; |
| |
| final RenderObject target = tester.renderObject(find.byWidget(children[5])); |
| RevealedOffset revealed = viewport.getOffsetToReveal(target, 0.0); |
| expect(revealed.offset, 500.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 100.0, 300.0, 100.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0); |
| expect(revealed.offset, 400.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 0.0, 300.0, 100.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 0.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 550.0); |
| expect(revealed.rect, const Rect.fromLTWH(40.0, 190.0, 10.0, 10.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 360.0); |
| expect(revealed.rect, const Rect.fromLTWH(40.0, 0.0, 10.0, 10.0)); |
| }); |
| |
| testWidgets('SingleChildScrollView getOffsetToReveal - right', (WidgetTester tester) async { |
| List<Widget> children; |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 300.0, |
| width: 200.0, |
| child: SingleChildScrollView( |
| scrollDirection: Axis.horizontal, |
| controller: ScrollController(initialScrollOffset: 300.0), |
| child: Row( |
| children: children = List<Widget>.generate(20, (int i) { |
| return Container( |
| height: 300.0, |
| width: 100.0, |
| child: Text('Tile $i'), |
| ); |
| }), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final RenderAbstractViewport viewport = tester.allRenderObjects.whereType<RenderAbstractViewport>().first; |
| |
| final RenderObject target = tester.renderObject(find.byWidget(children[5])); |
| RevealedOffset revealed = viewport.getOffsetToReveal(target, 0.0); |
| expect(revealed.offset, 500.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 0.0, 100.0, 300.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0); |
| expect(revealed.offset, 400.0); |
| expect(revealed.rect, const Rect.fromLTWH(100.0, 0.0, 100.0, 300.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 0.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 540.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 40.0, 10.0, 10.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 350.0); |
| expect(revealed.rect, const Rect.fromLTWH(190.0, 40.0, 10.0, 10.0)); |
| }); |
| |
| testWidgets('SingleChildScrollView getOffsetToReveal - left', (WidgetTester tester) async { |
| final List<Widget> children = List<Widget>.generate(20, (int i) { |
| return Container( |
| height: 300.0, |
| width: 100.0, |
| child: Text('Tile $i'), |
| ); |
| }); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 300.0, |
| width: 200.0, |
| child: SingleChildScrollView( |
| scrollDirection: Axis.horizontal, |
| reverse: true, |
| controller: ScrollController(initialScrollOffset: 300.0), |
| child: Row( |
| children: children.reversed.toList(), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final RenderAbstractViewport viewport = tester.allRenderObjects.whereType<RenderAbstractViewport>().first; |
| |
| final RenderObject target = tester.renderObject(find.byWidget(children[5])); |
| RevealedOffset revealed = viewport.getOffsetToReveal(target, 0.0); |
| expect(revealed.offset, 500.0); |
| expect(revealed.rect, const Rect.fromLTWH(100.0, 0.0, 100.0, 300.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0); |
| expect(revealed.offset, 400.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 0.0, 100.0, 300.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 0.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 550.0); |
| expect(revealed.rect, const Rect.fromLTWH(190.0, 40.0, 10.0, 10.0)); |
| |
| revealed = viewport.getOffsetToReveal(target, 1.0, rect: const Rect.fromLTWH(40.0, 40.0, 10.0, 10.0)); |
| expect(revealed.offset, 360.0); |
| expect(revealed.rect, const Rect.fromLTWH(0.0, 40.0, 10.0, 10.0)); |
| }); |
| |
| testWidgets('Nested SingleChildScrollView showOnScreen', (WidgetTester tester) async { |
| final List<List<Widget>> children = List<List<Widget>>(10); |
| ScrollController controllerX; |
| ScrollController controllerY; |
| |
| /// Builds a gird: |
| /// |
| /// <- x -> |
| /// 0 1 2 3 4 5 6 7 8 9 |
| /// 0 c c c c c c c c c c |
| /// 1 c c c c c c c c c c |
| /// 2 c c c c c c c c c c |
| /// 3 c c c c c c c c c c y |
| /// 4 c c c c v v c c c c |
| /// 5 c c c c v v c c c c |
| /// 6 c c c c c c c c c c |
| /// 7 c c c c c c c c c c |
| /// 8 c c c c c c c c c c |
| /// 9 c c c c c c c c c c |
| /// |
| /// Each c is a 100x100 container, v are containers visible in initial |
| /// viewport. |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 200.0, |
| width: 200.0, |
| child: SingleChildScrollView( |
| controller: controllerY = ScrollController(initialScrollOffset: 400.0), |
| child: SingleChildScrollView( |
| controller: controllerX = ScrollController(initialScrollOffset: 400.0), |
| scrollDirection: Axis.horizontal, |
| child: Column( |
| children: List<Widget>.generate(10, (int y) { |
| return Row( |
| children: children[y] = List<Widget>.generate(10, (int x) { |
| return SizedBox( |
| key: UniqueKey(), |
| height: 100.0, |
| width: 100.0, |
| ); |
| }), |
| ); |
| }), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| expect(controllerX.offset, 400.0); |
| expect(controllerY.offset, 400.0); |
| |
| // Already in viewport |
| tester.renderObject(find.byWidget(children[4][4])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 400.0); |
| expect(controllerY.offset, 400.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Above viewport |
| tester.renderObject(find.byWidget(children[3][4])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 400.0); |
| expect(controllerY.offset, 300.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Below viewport |
| tester.renderObject(find.byWidget(children[6][4])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 400.0); |
| expect(controllerY.offset, 500.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Left of viewport |
| tester.renderObject(find.byWidget(children[4][3])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 300.0); |
| expect(controllerY.offset, 400.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Right of viewport |
| tester.renderObject(find.byWidget(children[4][6])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 500.0); |
| expect(controllerY.offset, 400.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Above and left of viewport |
| tester.renderObject(find.byWidget(children[3][3])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 300.0); |
| expect(controllerY.offset, 300.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Below and left of viewport |
| tester.renderObject(find.byWidget(children[6][3])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 300.0); |
| expect(controllerY.offset, 500.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Above and right of viewport |
| tester.renderObject(find.byWidget(children[3][6])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 500.0); |
| expect(controllerY.offset, 300.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Below and right of viewport |
| tester.renderObject(find.byWidget(children[6][6])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 500.0); |
| expect(controllerY.offset, 500.0); |
| |
| controllerX.jumpTo(400.0); |
| controllerY.jumpTo(400.0); |
| await tester.pumpAndSettle(); |
| |
| // Below and right of viewport with animations |
| tester.renderObject(find.byWidget(children[6][6])).showOnScreen(duration: const Duration(seconds: 2)); |
| await tester.pump(); |
| await tester.pump(const Duration(seconds: 1)); |
| expect(tester.hasRunningAnimations, isTrue); |
| expect(controllerX.offset, greaterThan(400.0)); |
| expect(controllerX.offset, lessThan(500.0)); |
| expect(controllerY.offset, greaterThan(400.0)); |
| expect(controllerY.offset, lessThan(500.0)); |
| await tester.pumpAndSettle(); |
| expect(controllerX.offset, 500.0); |
| expect(controllerY.offset, 500.0); |
| }); |
| |
| group('Nested SingleChildScrollView (same orientation) showOnScreen', () { |
| List<Widget> children; |
| |
| Future<void> buildNestedScroller({ WidgetTester tester, ScrollController inner, ScrollController outer }) { |
| return tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Center( |
| child: Container( |
| height: 200.0, |
| width: 300.0, |
| child: SingleChildScrollView( |
| controller: outer, |
| child: Column( |
| children: <Widget>[ |
| Container( |
| height: 200.0, |
| ), |
| Container( |
| height: 200.0, |
| width: 300.0, |
| child: SingleChildScrollView( |
| controller: inner, |
| child: Column( |
| children: children = List<Widget>.generate(10, (int i) { |
| return Container( |
| height: 100.0, |
| width: 300.0, |
| child: Text('$i'), |
| ); |
| }), |
| ), |
| ), |
| ), |
| Container( |
| height: 200.0, |
| ), |
| ], |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| } |
| |
| testWidgets('in view in inner, but not in outer', (WidgetTester tester) async { |
| final ScrollController inner = ScrollController(); |
| final ScrollController outer = ScrollController(); |
| await buildNestedScroller( |
| tester: tester, |
| inner: inner, |
| outer: outer, |
| ); |
| expect(outer.offset, 0.0); |
| expect(inner.offset, 0.0); |
| |
| tester.renderObject(find.byWidget(children[0])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(inner.offset, 0.0); |
| expect(outer.offset, 100.0); |
| }); |
| |
| testWidgets('not in view of neither inner nor outer', (WidgetTester tester) async { |
| final ScrollController inner = ScrollController(); |
| final ScrollController outer = ScrollController(); |
| await buildNestedScroller( |
| tester: tester, |
| inner: inner, |
| outer: outer, |
| ); |
| expect(outer.offset, 0.0); |
| expect(inner.offset, 0.0); |
| |
| tester.renderObject(find.byWidget(children[5])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(inner.offset, 400.0); |
| expect(outer.offset, 200.0); |
| }); |
| |
| testWidgets('in view in inner and outer', (WidgetTester tester) async { |
| final ScrollController inner = ScrollController(initialScrollOffset: 200.0); |
| final ScrollController outer = ScrollController(initialScrollOffset: 200.0); |
| await buildNestedScroller( |
| tester: tester, |
| inner: inner, |
| outer: outer, |
| ); |
| expect(outer.offset, 200.0); |
| expect(inner.offset, 200.0); |
| |
| tester.renderObject(find.byWidget(children[2])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(outer.offset, 200.0); |
| expect(inner.offset, 200.0); |
| }); |
| |
| testWidgets('inner shown in outer, but item not visible', (WidgetTester tester) async { |
| final ScrollController inner = ScrollController(initialScrollOffset: 200.0); |
| final ScrollController outer = ScrollController(initialScrollOffset: 200.0); |
| await buildNestedScroller( |
| tester: tester, |
| inner: inner, |
| outer: outer, |
| ); |
| expect(outer.offset, 200.0); |
| expect(inner.offset, 200.0); |
| |
| tester.renderObject(find.byWidget(children[5])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(outer.offset, 200.0); |
| expect(inner.offset, 400.0); |
| }); |
| |
| testWidgets('inner half shown in outer, item only visible in inner', (WidgetTester tester) async { |
| final ScrollController inner = ScrollController(); |
| final ScrollController outer = ScrollController(initialScrollOffset: 100.0); |
| await buildNestedScroller( |
| tester: tester, |
| inner: inner, |
| outer: outer, |
| ); |
| expect(outer.offset, 100.0); |
| expect(inner.offset, 0.0); |
| |
| tester.renderObject(find.byWidget(children[1])).showOnScreen(); |
| await tester.pumpAndSettle(); |
| expect(outer.offset, 200.0); |
| expect(inner.offset, 0.0); |
| }); |
| }); |
| } |
