| // 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_test/flutter_test.dart'; |
| import 'package:flutter/rendering.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| import '../rendering/mock_canvas.dart'; |
| |
| Future<void> test(WidgetTester tester, double offset) { |
| return tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(offset), |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 400.0, child: Text('a')), |
| SizedBox(height: 400.0, child: Text('b')), |
| SizedBox(height: 400.0, child: Text('c')), |
| SizedBox(height: 400.0, child: Text('d')), |
| SizedBox(height: 400.0, child: Text('e')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| Future<void> testWithConstChildDelegate(WidgetTester tester, double offset) { |
| return tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(offset), |
| slivers: const <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate.fixed(<Widget>[ |
| SizedBox(height: 400.0, child: Text('a')), |
| SizedBox(height: 400.0, child: Text('b')), |
| SizedBox(height: 400.0, child: Text('c')), |
| SizedBox(height: 400.0, child: Text('d')), |
| SizedBox(height: 400.0, child: Text('e')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| void verify(WidgetTester tester, List<Offset> answerKey, String text) { |
| final List<Offset> testAnswers = tester.renderObjectList<RenderBox>(find.byType(SizedBox)).map<Offset>( |
| (RenderBox target) => target.localToGlobal(const Offset(0.0, 0.0)) |
| ).toList(); |
| expect(testAnswers, equals(answerKey)); |
| final String foundText = |
| tester.widgetList<Text>(find.byType(Text)) |
| .map<String>((Text widget) => widget.data) |
| .reduce((String value, String element) => value + element); |
| expect(foundText, equals(text)); |
| } |
| |
| void main() { |
| testWidgets('Viewport+SliverBlock basic test', (WidgetTester tester) async { |
| await test(tester, 0.0); |
| expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size, equals(const Size(800.0, 600.0))); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 400.0), |
| ], 'ab'); |
| |
| await test(tester, 200.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'ab'); |
| |
| await test(tester, 600.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'bc'); |
| |
| await test(tester, 900.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -100.0), |
| const Offset(0.0, 300.0), |
| ], 'cd'); |
| |
| await test(tester, 200.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'ab'); |
| }); |
| |
| testWidgets('Viewport+SliverBlock basic test with constant SliverChildListDelegate', (WidgetTester tester) async { |
| await testWithConstChildDelegate(tester, 0.0); |
| expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size, equals(const Size(800.0, 600.0))); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 400.0), |
| ], 'ab'); |
| |
| await testWithConstChildDelegate(tester, 200.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'ab'); |
| |
| await testWithConstChildDelegate(tester, 600.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'bc'); |
| |
| await testWithConstChildDelegate(tester, 900.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -100.0), |
| const Offset(0.0, 300.0), |
| ], 'cd'); |
| |
| await testWithConstChildDelegate(tester, 200.0); |
| verify(tester, <Offset>[ |
| const Offset(0.0, -200.0), |
| const Offset(0.0, 200.0), |
| ], 'ab'); |
| }); |
| |
| testWidgets('Viewport with GlobalKey reparenting', (WidgetTester tester) async { |
| final Key key1 = GlobalKey(); |
| final ViewportOffset offset = ViewportOffset.zero(); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: offset, |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(<Widget>[ |
| const SizedBox(height: 251.0, child: Text('a')), |
| const SizedBox(height: 252.0, child: Text('b')), |
| SizedBox(key: key1, height: 253.0, child: const Text('c')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 251.0), |
| const Offset(0.0, 503.0), |
| ], 'abc'); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: offset, |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(<Widget>[ |
| SizedBox(key: key1, height: 253.0, child: const Text('c')), |
| const SizedBox(height: 251.0, child: Text('a')), |
| const SizedBox(height: 252.0, child: Text('b')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 253.0), |
| const Offset(0.0, 504.0), |
| ], 'cab'); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: offset, |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(<Widget>[ |
| const SizedBox(height: 251.0, child: Text('a')), |
| SizedBox(key: key1, height: 253.0, child: const Text('c')), |
| const SizedBox(height: 252.0, child: Text('b')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 251.0), |
| const Offset(0.0, 504.0), |
| ], 'acb'); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: offset, |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 251.0, child: Text('a')), |
| SizedBox(height: 252.0, child: Text('b')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 251.0), |
| ], 'ab'); |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: offset, |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(<Widget>[ |
| const SizedBox(height: 251.0, child: Text('a')), |
| SizedBox(key: key1, height: 253.0, child: const Text('c')), |
| const SizedBox(height: 252.0, child: Text('b')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| verify(tester, <Offset>[ |
| const Offset(0.0, 0.0), |
| const Offset(0.0, 251.0), |
| const Offset(0.0, 504.0), |
| ], 'acb'); |
| }); |
| |
| testWidgets('Viewport overflow clipping of SliverToBoxAdapter', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.zero(), |
| slivers: const <Widget>[ |
| SliverToBoxAdapter( |
| child: SizedBox(height: 400.0, child: Text('a')), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), isNot(paints..clipRect())); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(100.0), |
| slivers: const <Widget>[ |
| SliverToBoxAdapter( |
| child: SizedBox(height: 400.0, child: Text('a')), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(100.0), |
| slivers: const <Widget>[ |
| SliverToBoxAdapter( |
| child: SizedBox(height: 4000.0, child: Text('a')), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.zero(), |
| slivers: const <Widget>[ |
| SliverToBoxAdapter( |
| child: SizedBox(height: 4000.0, child: Text('a')), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| }); |
| |
| testWidgets('Viewport overflow clipping of SliverBlock', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.zero(), |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 400.0, child: Text('a')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), isNot(paints..clipRect())); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(100.0), |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 400.0, child: Text('a')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.fixed(100.0), |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 4000.0, child: Text('a')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| |
| await tester.pumpWidget( |
| Directionality( |
| textDirection: TextDirection.ltr, |
| child: Viewport( |
| offset: ViewportOffset.zero(), |
| slivers: <Widget>[ |
| SliverList( |
| delegate: SliverChildListDelegate(const <Widget>[ |
| SizedBox(height: 4000.0, child: Text('a')), |
| ]), |
| ), |
| ], |
| ), |
| ), |
| ); |
| |
| expect(find.byType(Viewport), paints..clipRect()); |
| }); |
| } |