| // Copyright 2019 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/rendering.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/material.dart'; |
| |
| void main() { |
| testWidgets('!pinned && !floating && !bottom ==> fade opactiy', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: false, |
| floating: false, |
| bottom: false, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 0.0); |
| }); |
| |
| testWidgets('!pinned && !floating && bottom ==> fade opactiy', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: false, |
| floating: false, |
| bottom: true, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 0.0); |
| }); |
| |
| testWidgets('!pinned && floating && !bottom ==> fade opactiy', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: false, |
| floating: true, |
| bottom: false, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 0.0); |
| }); |
| |
| testWidgets('!pinned && floating && bottom ==> fade opactiy', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: false, |
| floating: true, |
| bottom: true, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 0.0); |
| }); |
| |
| testWidgets('pinned && !floating && !bottom ==> 1.0 opacity', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: true, |
| floating: false, |
| bottom: false, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 1.0); |
| }); |
| |
| testWidgets('pinned && !floating && bottom ==> 1.0 opacity', (WidgetTester tester) async { |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: true, |
| floating: false, |
| bottom: true, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 1.0); |
| }); |
| |
| testWidgets('pinned && floating && !bottom ==> 1.0 opacity', (WidgetTester tester) async { |
| // Regression test for https://github.com/flutter/flutter/issues/25000. |
| |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: true, |
| floating: true, |
| bottom: false, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 1.0); |
| }); |
| |
| testWidgets('pinned && floating && bottom ==> fade opactiy', (WidgetTester tester) async { |
| // Regression test for https://github.com/flutter/flutter/issues/25993. |
| |
| final ScrollController controller = ScrollController(); |
| await tester.pumpWidget( |
| _TestWidget( |
| pinned: true, |
| floating: true, |
| bottom: true, |
| controller: controller, |
| ) |
| ); |
| |
| final RenderParagraph render = tester.renderObject(find.text('Hallo Welt!!1')); |
| expect(render.text.style.color.opacity, 1.0); |
| |
| controller.jumpTo(200.0); |
| await tester.pumpAndSettle(); |
| expect(render.text.style.color.opacity, 0.0); |
| }); |
| } |
| |
| class _TestWidget extends StatelessWidget { |
| |
| const _TestWidget({this.pinned, this.floating, this.bottom, this.controller}); |
| |
| final bool pinned; |
| final bool floating; |
| final bool bottom; |
| final ScrollController controller; |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| home: CustomScrollView( |
| controller: controller, |
| slivers: <Widget>[ |
| SliverAppBar( |
| pinned: pinned, |
| floating: floating, |
| expandedHeight: 120.0, |
| title: const Text('Hallo Welt!!1'), |
| bottom: !bottom ? null : PreferredSize( |
| preferredSize: const Size.fromHeight(35.0), |
| child: Container(), |
| ), |
| ), |
| SliverList( |
| delegate: SliverChildListDelegate(List<Widget>.generate(20, (int i) { |
| return Container( |
| child: Text('Tile $i'), |
| height: 100.0, |
| ); |
| })), |
| ), |
| ], |
| ), |
| ); |
| } |
| |
| } |