| // 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:math' as math; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter/rendering.dart'; |
| |
| import '../rendering/mock_canvas.dart'; |
| |
| final Matcher doesNotOverscroll = isNot(paints..circle()); |
| |
| Future<void> slowDrag(WidgetTester tester, Offset start, Offset offset) async { |
| final TestGesture gesture = await tester.startGesture(start); |
| for (int index = 0; index < 10; index += 1) { |
| await gesture.moveBy(offset); |
| await tester.pump(const Duration(milliseconds: 20)); |
| } |
| await gesture.up(); |
| } |
| |
| void main() { |
| testWidgets('Overscroll indicator color', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 2000.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| |
| expect(painter, doesNotOverscroll); |
| |
| // the scroll gesture from tester.scroll happens in zero time, so nothing should appear: |
| await tester.drag(find.byType(Scrollable), const Offset(0.0, 100.0)); |
| expect(painter, doesNotOverscroll); |
| await tester.pump(); // allow the ticker to register itself |
| expect(painter, doesNotOverscroll); |
| await tester.pump(const Duration(milliseconds: 100)); // animate |
| expect(painter, doesNotOverscroll); |
| |
| final TestGesture gesture = await tester.startGesture(const Offset(200.0, 200.0)); |
| await tester.pump(const Duration(milliseconds: 100)); // animate |
| expect(painter, doesNotOverscroll); |
| await gesture.up(); |
| expect(painter, doesNotOverscroll); |
| |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0)); |
| expect(painter, paints..circle(color: const Color(0x0DFFFFFF))); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| testWidgets('Nested scrollable', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: GlowingOverscrollIndicator( |
| axisDirection: AxisDirection.down, |
| color: const Color(0x0DFFFFFF), |
| notificationPredicate: (ScrollNotification notification) => notification.depth == 1, |
| child: SingleChildScrollView( |
| scrollDirection: Axis.horizontal, |
| child: Container( |
| width: 600.0, |
| child: const CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 2000.0)), |
| ], |
| ), |
| ), |
| ), |
| ), |
| ), |
| ); |
| |
| final RenderObject outerPainter = tester.renderObject(find.byType(CustomPaint).first); |
| final RenderObject innerPainter = tester.renderObject(find.byType(CustomPaint).last); |
| |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0)); |
| expect(outerPainter, paints..circle()); |
| expect(innerPainter, paints..circle()); |
| }); |
| |
| testWidgets('Overscroll indicator changes side when you drag on the other side', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 2000.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| |
| await slowDrag(tester, const Offset(400.0, 200.0), const Offset(0.0, 10.0)); |
| expect(painter, paints..circle(x: 400.0)); |
| await slowDrag(tester, const Offset(100.0, 200.0), const Offset(0.0, 10.0)); |
| expect(painter, paints..something((Symbol method, List<dynamic> arguments) { |
| if (method != #drawCircle) |
| return false; |
| final Offset center = arguments[0] as Offset; |
| if (center.dx < 400.0) |
| return true; |
| throw 'Dragging on left hand side did not overscroll on left hand side.'; |
| })); |
| await slowDrag(tester, const Offset(700.0, 200.0), const Offset(0.0, 10.0)); |
| expect(painter, paints..something((Symbol method, List<dynamic> arguments) { |
| if (method != #drawCircle) |
| return false; |
| final Offset center = arguments[0] as Offset; |
| if (center.dx > 400.0) |
| return true; |
| throw 'Dragging on right hand side did not overscroll on right hand side.'; |
| })); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| testWidgets('Overscroll indicator changes side when you shift sides', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 2000.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| final TestGesture gesture = await tester.startGesture(const Offset(300.0, 200.0)); |
| await gesture.moveBy(const Offset(0.0, 10.0)); |
| await tester.pump(const Duration(milliseconds: 20)); |
| double oldX = 0.0; |
| for (int index = 0; index < 10; index += 1) { |
| await gesture.moveBy(const Offset(50.0, 50.0)); |
| await tester.pump(const Duration(milliseconds: 20)); |
| expect(painter, paints..something((Symbol method, List<dynamic> arguments) { |
| if (method != #drawCircle) |
| return false; |
| final Offset center = arguments[0] as Offset; |
| if (center.dx <= oldX) |
| throw 'Sliding to the right did not make the center of the radius slide to the right.'; |
| oldX = center.dx; |
| return true; |
| })); |
| } |
| await gesture.up(); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| group("Flipping direction of scrollable doesn't change overscroll behavior", () { |
| testWidgets('down', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| physics: AlwaysScrollableScrollPhysics(), |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0)); |
| expect(painter, paints..save()..circle()..restore()..save()..scale(y: -1.0)..restore()..restore()); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| testWidgets('up', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| reverse: true, |
| physics: AlwaysScrollableScrollPhysics(), |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0)); |
| expect(painter, paints..save()..scale(y: -1.0)..restore()..save()..circle()..restore()..restore()); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| }); |
| |
| testWidgets('Overscroll in both directions', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| physics: AlwaysScrollableScrollPhysics(), |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0)); |
| expect(painter, paints..circle()); |
| expect(painter, isNot(paints..circle()..circle())); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, -5.0)); |
| expect(painter, paints..circle()..circle()); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| testWidgets('Overscroll horizontally', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Directionality( |
| textDirection: TextDirection.ltr, |
| child: CustomScrollView( |
| scrollDirection: Axis.horizontal, |
| physics: AlwaysScrollableScrollPhysics(), |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ); |
| final RenderObject painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0)); |
| expect(painter, paints..rotate(angle: math.pi / 2.0)..circle()..saveRestore()); |
| expect(painter, isNot(paints..circle()..circle())); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(-5.0, 0.0)); |
| expect(painter, paints..rotate(angle: math.pi / 2.0)..circle() |
| ..rotate(angle: math.pi / 2.0)..circle()); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| expect(painter, doesNotOverscroll); |
| }); |
| |
| testWidgets('Nested overscrolls do not throw exceptions', (WidgetTester tester) async { |
| await tester.pumpWidget(Directionality( |
| textDirection: TextDirection.ltr, |
| child: PageView( |
| children: <Widget>[ |
| ListView( |
| children: <Widget>[ |
| Container( |
| width: 2000.0, |
| height: 2000.0, |
| color: const Color(0xFF00FF00), |
| ), |
| ], |
| ), |
| ], |
| ), |
| )); |
| |
| await tester.dragFrom(const Offset(100.0, 100.0), const Offset(0.0, 2000.0)); |
| await tester.pumpAndSettle(); |
| }); |
| |
| testWidgets('Changing settings', (WidgetTester tester) async { |
| RenderObject painter; |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: ScrollConfiguration( |
| behavior: TestScrollBehavior1(), |
| child: const CustomScrollView( |
| scrollDirection: Axis.horizontal, |
| physics: AlwaysScrollableScrollPhysics(), |
| reverse: true, |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ), |
| ); |
| painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0)); |
| expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A00FF00))); |
| expect(painter, isNot(paints..circle()..circle())); |
| |
| await tester.pumpAndSettle(const Duration(seconds: 1)); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: ScrollConfiguration( |
| behavior: TestScrollBehavior2(), |
| child: const CustomScrollView( |
| scrollDirection: Axis.horizontal, |
| physics: AlwaysScrollableScrollPhysics(), |
| slivers: <Widget>[ |
| SliverToBoxAdapter(child: SizedBox(height: 20.0)), |
| ], |
| ), |
| ), |
| ), |
| ); |
| painter = tester.renderObject(find.byType(CustomPaint)); |
| await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0)); |
| expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A0000FF))..saveRestore()); |
| expect(painter, isNot(paints..circle()..circle())); |
| }); |
| } |
| |
| class TestScrollBehavior1 extends ScrollBehavior { |
| @override |
| Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) { |
| return GlowingOverscrollIndicator( |
| child: child, |
| axisDirection: axisDirection, |
| color: const Color(0xFF00FF00), |
| ); |
| } |
| } |
| |
| class TestScrollBehavior2 extends ScrollBehavior { |
| @override |
| Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) { |
| return GlowingOverscrollIndicator( |
| child: child, |
| axisDirection: axisDirection, |
| color: const Color(0xFF0000FF), |
| ); |
| } |
| } |