blob: 29eab1d2056f9c19c29d912e68e61d79868b23ca [file] [log] [blame]
// Copyright 2017 The Chromium 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/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(
'_RenderSliverLayoutBuilder#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: RenderSliverPadding#00000 relayoutBoundary=up2\n'
' │ needs compositing\n'
' │ parentData: <none> (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'
' │ padding: EdgeInsets.zero\n'
' │ textDirection: ltr\n'
' │\n'
' └─child: RenderSliverFixedExtentList#00000 relayoutBoundary=up3\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'
''
),
);
});
}