| // 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_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| void main() { |
| testWidgets('SliverFillViewport control test', (WidgetTester tester) async { |
| final List<Widget> children = List<Widget>.generate(20, (int i) { |
| return Container(child: Text('$i', textDirection: TextDirection.ltr)); |
| }); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverFillViewport( |
| delegate: SliverChildListDelegate(children, addAutomaticKeepAlives: false, addSemanticIndexes: false), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| final RenderBox box = tester.renderObject<RenderBox>(find.byType(Container).first); |
| expect(box.size.height, equals(600.0)); |
| |
| expect(find.text('0'), findsOneWidget); |
| expect(find.text('1'), findsNothing); |
| expect(find.text('2'), findsNothing); |
| |
| await tester.drag(find.byType(Scrollable), const Offset(0.0, -700.0)); |
| await tester.pump(); |
| |
| expect(find.text('0'), findsNothing); |
| expect(find.text('1'), findsOneWidget); |
| expect(find.text('2'), findsOneWidget); |
| expect(find.text('3'), findsNothing); |
| expect(find.text('4'), findsNothing); |
| |
| await tester.drag(find.byType(Scrollable), const Offset(0.0, 200.0)); |
| await tester.pump(); |
| |
| expect(find.text('0'), findsOneWidget); |
| expect(find.text('1'), findsOneWidget); |
| expect(find.text('2'), findsNothing); |
| expect(find.text('3'), findsNothing); |
| |
| await tester.drag(find.byType(Scrollable), const Offset(0.0, 700.0)); |
| await tester.pump(); |
| |
| final RenderBox box2 = tester.renderObject<RenderBox>(find.byType(Container).first); |
| expect(box2.size.height, equals(600.0)); |
| |
| expect(find.text('0'), findsOneWidget); |
| expect(find.text('1'), findsNothing); |
| expect(find.text('2'), findsNothing); |
| expect(find.text('3'), findsNothing); |
| |
| final RenderObject viewport = tester.renderObject<RenderObject>(find.byType(SliverFillViewport).first); |
| expect(viewport, hasAGoodToStringDeep); |
| expect( |
| viewport.toStringDeep(minLevel: DiagnosticLevel.info), |
| equalsIgnoringHashCodes( |
| '_RenderSliverFractionalPadding#00000 relayoutBoundary=up1\n' |
| ' │ needs compositing\n' |
| ' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n' |
| ' │ constraints: SliverConstraints(AxisDirection.down,\n' |
| ' │ GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n' |
| ' │ 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0,\n' |
| ' │ crossAxisDirection: AxisDirection.right,\n' |
| ' │ viewportMainAxisExtent: 600.0, remainingCacheExtent: 850.0,\n' |
| ' │ cacheOrigin: 0.0)\n' |
| ' │ geometry: SliverGeometry(scrollExtent: 12000.0, paintExtent:\n' |
| ' │ 600.0, maxPaintExtent: 12000.0, hasVisualOverflow: true,\n' |
| ' │ cacheExtent: 850.0)\n' |
| ' │\n' |
| ' └─child: RenderSliverFillViewport#00000 relayoutBoundary=up2\n' |
| ' │ needs compositing\n' |
| ' │ parentData: paintOffset=Offset(0.0, 0.0) (can use size)\n' |
| ' │ constraints: SliverConstraints(AxisDirection.down,\n' |
| ' │ GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n' |
| ' │ 0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0,\n' |
| ' │ crossAxisDirection: AxisDirection.right,\n' |
| ' │ viewportMainAxisExtent: 600.0, remainingCacheExtent: 850.0,\n' |
| ' │ cacheOrigin: 0.0)\n' |
| ' │ geometry: SliverGeometry(scrollExtent: 12000.0, paintExtent:\n' |
| ' │ 600.0, maxPaintExtent: 12000.0, hasVisualOverflow: true,\n' |
| ' │ cacheExtent: 850.0)\n' |
| ' │ currently live children: 0 to 1\n' |
| ' │\n' |
| ' ├─child with index 0: RenderRepaintBoundary#00000\n' |
| ' │ │ needs compositing\n' |
| ' │ │ parentData: index=0; layoutOffset=0.0\n' |
| ' │ │ constraints: BoxConstraints(w=800.0, h=600.0)\n' |
| ' │ │ layer: OffsetLayer#00000\n' |
| ' │ │ size: Size(800.0, 600.0)\n' |
| ' │ │ metrics: 66.7% useful (1 bad vs 2 good)\n' |
| ' │ │ diagnosis: insufficient data to draw conclusion (less than five\n' |
| ' │ │ repaints)\n' |
| ' │ │\n' |
| ' │ └─child: RenderParagraph#00000\n' |
| ' │ │ parentData: <none> (can use size)\n' |
| ' │ │ constraints: BoxConstraints(w=800.0, h=600.0)\n' |
| ' │ │ semantics node: SemanticsNode#2\n' |
| ' │ │ size: Size(800.0, 600.0)\n' |
| ' │ │ textAlign: start\n' |
| ' │ │ textDirection: ltr\n' |
| ' │ │ softWrap: wrapping at box width\n' |
| ' │ │ overflow: clip\n' |
| ' │ │ maxLines: unlimited\n' |
| ' │ ╘═╦══ text ═══\n' |
| ' │ ║ TextSpan:\n' |
| ' │ ║ <all styles inherited>\n' |
| ' │ ║ "0"\n' |
| ' │ ╚═══════════\n' |
| ' └─child with index 1: RenderRepaintBoundary#00000\n' |
| ' │ needs compositing\n' |
| ' │ parentData: index=1; layoutOffset=600.0\n' |
| ' │ constraints: BoxConstraints(w=800.0, h=600.0)\n' |
| ' │ layer: OffsetLayer#00000 DETACHED\n' |
| ' │ size: Size(800.0, 600.0)\n' |
| ' │ metrics: 50.0% useful (1 bad vs 1 good)\n' |
| ' │ diagnosis: insufficient data to draw conclusion (less than five\n' |
| ' │ repaints)\n' |
| ' │\n' |
| ' └─child: RenderParagraph#00000\n' |
| ' │ parentData: <none> (can use size)\n' |
| ' │ constraints: BoxConstraints(w=800.0, h=600.0)\n' |
| ' │ semantics node: SemanticsNode#3\n' |
| ' │ size: Size(800.0, 600.0)\n' |
| ' │ textAlign: start\n' |
| ' │ textDirection: ltr\n' |
| ' │ softWrap: wrapping at box width\n' |
| ' │ overflow: clip\n' |
| ' │ maxLines: unlimited\n' |
| ' ╘═╦══ text ═══\n' |
| ' ║ TextSpan:\n' |
| ' ║ <all styles inherited>\n' |
| ' ║ "1"\n' |
| ' ╚═══════════\n' |
| '' |
| ), |
| ); |
| }); |
| |
| testWidgets('SliverFillViewport padding test', (WidgetTester tester) async { |
| final SliverChildListDelegate delegate = SliverChildListDelegate( |
| <Widget>[ |
| Container(child: const Text('0')), |
| ], |
| addAutomaticKeepAlives: false, |
| addSemanticIndexes: false, |
| ); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverFillViewport( |
| padEnds: true, |
| viewportFraction: 0.5, |
| delegate: delegate, |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| final RenderSliver boxWithPadding = tester.renderObject<RenderSliver>(find.byType(SliverFillViewport)); |
| expect(boxWithPadding.geometry.paintExtent, equals(600.0)); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverFillViewport( |
| padEnds: false, |
| viewportFraction: 0.5, |
| delegate: delegate, |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| final RenderSliver boxWithoutPadding = tester.renderObject<RenderSliver>(find.byType(SliverFillViewport)); |
| expect(boxWithoutPadding.geometry.paintExtent, equals(300.0)); |
| }); |
| } |