| // Copyright 2016 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/rendering.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| void verifyPaintPosition(GlobalKey key, Offset ideal, bool visible) { |
| final RenderSliver target = key.currentContext.findRenderObject(); |
| expect(target.parent, const isInstanceOf<RenderViewport>()); |
| final SliverPhysicalParentData parentData = target.parentData; |
| final Offset actual = parentData.paintOffset; |
| expect(actual, ideal); |
| final SliverGeometry geometry = target.geometry; |
| expect(geometry.visible, visible); |
| } |
| |
| void verifyActualBoxPosition(WidgetTester tester, Finder finder, int index, Rect ideal) { |
| final RenderBox box = tester.renderObjectList<RenderBox>(finder).elementAt(index); |
| final Rect rect = new Rect.fromPoints(box.localToGlobal(Offset.zero), box.localToGlobal(box.size.bottomRight(Offset.zero))); |
| expect(rect, equals(ideal)); |
| } |
| |
| void main() { |
| testWidgets('Sliver appbars - pinned', (WidgetTester tester) async { |
| const double bigHeight = 550.0; |
| GlobalKey key1, key2, key3, key4, key5; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new CustomScrollView( |
| slivers: <Widget>[ |
| new BigSliver(key: key1 = new GlobalKey(), height: bigHeight), |
| new SliverPersistentHeader(key: key2 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new SliverPersistentHeader(key: key3 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new BigSliver(key: key4 = new GlobalKey(), height: bigHeight), |
| new BigSliver(key: key5 = new GlobalKey(), height: bigHeight), |
| ], |
| ), |
| ), |
| ); |
| final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position; |
| final double max = bigHeight * 3.0 + new TestDelegate().maxExtent * 2.0 - 600.0; // 600 is the height of the test viewport |
| assert(max < 10000.0); |
| expect(max, 1450.0); |
| expect(position.pixels, 0.0); |
| expect(position.minScrollExtent, 0.0); |
| expect(position.maxScrollExtent, max); |
| position.animateTo(10000.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 10)); |
| expect(position.pixels, max); |
| expect(position.minScrollExtent, 0.0); |
| expect(position.maxScrollExtent, max); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 50.0), true); |
| }); |
| |
| testWidgets('Sliver appbars - toStringDeep of maxExtent that throws', (WidgetTester tester) async { |
| final TestDelegateThatCanThrow delegateThatCanThrow = new TestDelegateThatCanThrow(); |
| GlobalKey key; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new CustomScrollView( |
| slivers: <Widget>[ |
| new SliverPersistentHeader(key: key = new GlobalKey(), delegate: delegateThatCanThrow, pinned: true), |
| ], |
| ), |
| ), |
| ); |
| await tester.pumpAndSettle(const Duration(milliseconds: 10)); |
| |
| final RenderObject renderObject = key.currentContext.findRenderObject(); |
| // The delegate must only start throwing immediately before calling |
| // toStringDeep to avoid triggering spurious exceptions. |
| // If the _RenderSliverPinnedPersistentHeaderForWidgets class was not |
| // private it would make more sense to create an instance of it directly. |
| delegateThatCanThrow.shouldThrow = true; |
| expect(renderObject, hasAGoodToStringDeep); |
| expect( |
| renderObject.toStringDeep(minLevel: DiagnosticLevel.info), |
| equalsIgnoringHashCodes( |
| '_RenderSliverPinnedPersistentHeaderForWidgets#00000 relayoutBoundary=up1\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)\n' |
| ' │ geometry: SliverGeometry(scrollExtent: 200.0, paintExtent: 200.0,\n' |
| ' │ maxPaintExtent: 200.0, hasVisualOverflow: true)\n' |
| ' │ maxExtent: EXCEPTION (FlutterError)\n' |
| ' │ child position: 0.0\n' |
| ' │\n' |
| ' └─child: RenderConstrainedBox#00000 relayoutBoundary=up2\n' |
| ' │ parentData: <none> (can use size)\n' |
| ' │ constraints: BoxConstraints(w=800.0, 0.0<=h<=200.0)\n' |
| ' │ size: Size(800.0, 200.0)\n' |
| ' │ additionalConstraints: BoxConstraints(0.0<=w<=Infinity,\n' |
| ' │ 100.0<=h<=200.0)\n' |
| ' │\n' |
| ' └─child: RenderLimitedBox#00000 relayoutBoundary=up3\n' |
| ' │ parentData: <none> (can use size)\n' |
| ' │ constraints: BoxConstraints(w=800.0, 100.0<=h<=200.0)\n' |
| ' │ size: Size(800.0, 200.0)\n' |
| ' │ maxWidth: 0.0\n' |
| ' │ maxHeight: 0.0\n' |
| ' │\n' |
| ' └─child: RenderConstrainedBox#00000 relayoutBoundary=up4\n' |
| ' parentData: <none> (can use size)\n' |
| ' constraints: BoxConstraints(w=800.0, 100.0<=h<=200.0)\n' |
| ' size: Size(800.0, 200.0)\n' |
| ' additionalConstraints: BoxConstraints(biggest)\n' |
| ), |
| ); |
| }); |
| |
| testWidgets('Sliver appbars - pinned with slow scroll', (WidgetTester tester) async { |
| const double bigHeight = 550.0; |
| GlobalKey key1, key2, key3, key4, key5; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new CustomScrollView( |
| slivers: <Widget>[ |
| new BigSliver(key: key1 = new GlobalKey(), height: bigHeight), |
| new SliverPersistentHeader(key: key2 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new SliverPersistentHeader(key: key3 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new BigSliver(key: key4 = new GlobalKey(), height: bigHeight), |
| new BigSliver(key: key5 = new GlobalKey(), height: bigHeight), |
| ], |
| ), |
| ), |
| ); |
| |
| final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position; |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key2, const Offset(0.0, 550.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 600.0), false); |
| verifyPaintPosition(key4, const Offset(0.0, 600.0), false); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(550.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 100)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 200.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 400.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(600.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 200)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 150.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 350.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(650.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 300)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyActualBoxPosition(tester, find.byType(Container), 1, new Rect.fromLTWH(0.0, 100.0, 800.0, 200.0)); |
| verifyPaintPosition(key4, const Offset(0.0, 300.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(700.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 400)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyActualBoxPosition(tester, find.byType(Container), 1, new Rect.fromLTWH(0.0, 100.0, 800.0, 200.0)); |
| verifyPaintPosition(key4, const Offset(0.0, 250.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(750.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 500)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyActualBoxPosition(tester, find.byType(Container), 1, new Rect.fromLTWH(0.0, 100.0, 800.0, 200.0)); |
| verifyPaintPosition(key4, const Offset(0.0, 200.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(800.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 60)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 150.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(850.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 70)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(900.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 80)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 50.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 600.0), false); |
| position.animateTo(950.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 90)); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyActualBoxPosition(tester, find.byType(Container), 1, new Rect.fromLTWH(0.0, 100.0, 800.0, 100.0)); |
| verifyPaintPosition(key4, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key5, const Offset(0.0, 550.0), true); |
| }); |
| |
| testWidgets('Sliver appbars - pinned with less overlap', (WidgetTester tester) async { |
| const double bigHeight = 650.0; |
| GlobalKey key1, key2, key3, key4, key5; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new CustomScrollView( |
| slivers: <Widget>[ |
| new BigSliver(key: key1 = new GlobalKey(), height: bigHeight), |
| new SliverPersistentHeader(key: key2 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new SliverPersistentHeader(key: key3 = new GlobalKey(), delegate: new TestDelegate(), pinned: true), |
| new BigSliver(key: key4 = new GlobalKey(), height: bigHeight), |
| new BigSliver(key: key5 = new GlobalKey(), height: bigHeight), |
| ], |
| ), |
| ), |
| ); |
| final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position; |
| final double max = bigHeight * 3.0 + new TestDelegate().maxExtent * 2.0 - 600.0; // 600 is the height of the test viewport |
| assert(max < 10000.0); |
| expect(max, 1750.0); |
| expect(position.pixels, 0.0); |
| expect(position.minScrollExtent, 0.0); |
| expect(position.maxScrollExtent, max); |
| position.animateTo(10000.0, curve: Curves.linear, duration: const Duration(minutes: 1)); |
| await tester.pumpAndSettle(const Duration(milliseconds: 10)); |
| expect(position.pixels, max); |
| expect(position.minScrollExtent, 0.0); |
| expect(position.maxScrollExtent, max); |
| verifyPaintPosition(key1, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key2, const Offset(0.0, 0.0), true); |
| verifyPaintPosition(key3, const Offset(0.0, 100.0), true); |
| verifyPaintPosition(key4, const Offset(0.0, 0.0), false); |
| verifyPaintPosition(key5, const Offset(0.0, 0.0), true); |
| }); |
| |
| testWidgets('Sliver appbars - overscroll gap is below header', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new CustomScrollView( |
| physics: const BouncingScrollPhysics(), |
| slivers: <Widget>[ |
| new SliverPersistentHeader(delegate: new TestDelegate(), pinned: true), |
| const SliverList( |
| delegate: const SliverChildListDelegate(const <Widget>[ |
| const SizedBox( |
| height: 300.0, |
| child: const Text('X'), |
| ), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(tester.getTopLeft(find.byType(Container)), Offset.zero); |
| expect(tester.getTopLeft(find.text('X')), const Offset(0.0, 200.0)); |
| |
| final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position; |
| position.jumpTo(-50.0); |
| await tester.pump(); |
| |
| expect(tester.getTopLeft(find.byType(Container)), Offset.zero); |
| expect(tester.getTopLeft(find.text('X')), const Offset(0.0, 250.0)); |
| |
| position.jumpTo(50.0); |
| await tester.pump(); |
| |
| expect(tester.getTopLeft(find.byType(Container)), Offset.zero); |
| expect(tester.getTopLeft(find.text('X')), const Offset(0.0, 150.0)); |
| |
| position.jumpTo(150.0); |
| await tester.pump(); |
| |
| expect(tester.getTopLeft(find.byType(Container)), Offset.zero); |
| expect(tester.getTopLeft(find.text('X')), const Offset(0.0, 50.0)); |
| }); |
| } |
| |
| class TestDelegate extends SliverPersistentHeaderDelegate { |
| @override |
| double get maxExtent => 200.0; |
| |
| @override |
| double get minExtent => 100.0; |
| |
| @override |
| Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) { |
| return new Container(constraints: new BoxConstraints(minHeight: minExtent, maxHeight: maxExtent)); |
| } |
| |
| @override |
| bool shouldRebuild(TestDelegate oldDelegate) => false; |
| } |
| |
| class TestDelegateThatCanThrow extends SliverPersistentHeaderDelegate { |
| bool shouldThrow = false; |
| |
| @override |
| double get maxExtent { |
| return shouldThrow ? throw new FlutterError('Unavailable maxExtent') : 200.0; |
| } |
| |
| @override |
| double get minExtent { |
| return shouldThrow ? throw new FlutterError('Unavailable minExtent') : 100.0; |
| } |
| |
| @override |
| Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) { |
| return new Container(constraints: new BoxConstraints(minHeight: minExtent, maxHeight: maxExtent)); |
| } |
| |
| @override |
| bool shouldRebuild(TestDelegate oldDelegate) => false; |
| } |
| |
| |
| class RenderBigSliver extends RenderSliver { |
| RenderBigSliver(double height) : _height = height; |
| |
| double get height => _height; |
| double _height; |
| set height(double value) { |
| if (value == _height) |
| return; |
| _height = value; |
| markNeedsLayout(); |
| } |
| |
| double get paintExtent => (height - constraints.scrollOffset).clamp(0.0, constraints.remainingPaintExtent); |
| |
| @override |
| void performLayout() { |
| geometry = new SliverGeometry( |
| scrollExtent: height, |
| paintExtent: paintExtent, |
| maxPaintExtent: height, |
| ); |
| } |
| } |
| |
| class BigSliver extends LeafRenderObjectWidget { |
| const BigSliver({ Key key, this.height }) : super(key: key); |
| |
| final double height; |
| |
| @override |
| RenderBigSliver createRenderObject(BuildContext context) { |
| return new RenderBigSliver(height); |
| } |
| |
| @override |
| void updateRenderObject(BuildContext context, RenderBigSliver renderObject) { |
| renderObject.height = height; |
| } |
| } |