| // Copyright 2015 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'; |
| |
| const List<int> items = const <int>[0, 1, 2, 3, 4, 5]; |
| |
| void main() { |
| testWidgets('Tap item after scroll - horizontal', (WidgetTester tester) async { |
| final List<int> tapped = <int>[]; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new Center( |
| child: new Container( |
| height: 50.0, |
| child: new ListView( |
| itemExtent: 290.0, |
| scrollDirection: Axis.horizontal, |
| children: items.map((int item) { |
| return new Container( |
| child: new GestureDetector( |
| onTap: () { tapped.add(item); }, |
| child: new Text('$item'), |
| ), |
| ); |
| }).toList(), |
| ), |
| ), |
| ), |
| ), |
| ); |
| await tester.drag(find.text('2'), const Offset(-280.0, 0.0)); |
| await tester.pump(const Duration(seconds: 1)); |
| // screen is 800px wide, and has the following items: |
| // -280..10 = 0 |
| // 10..300 = 1 |
| // 300..590 = 2 |
| // 590..880 = 3 |
| expect(find.text('0'), findsOneWidget); |
| expect(find.text('1'), findsOneWidget); |
| expect(find.text('2'), findsOneWidget); |
| expect(find.text('3'), findsOneWidget); |
| expect(find.text('4'), findsNothing); |
| expect(find.text('5'), findsNothing); |
| expect(tapped, equals(<int>[])); |
| await tester.tap(find.text('2')); |
| expect(tapped, equals(<int>[2])); |
| }); |
| |
| testWidgets('Tap item after scroll - vertical', (WidgetTester tester) async { |
| final List<int> tapped = <int>[]; |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new Center( |
| child: new Container( |
| width: 50.0, |
| child: new ListView( |
| itemExtent: 290.0, |
| scrollDirection: Axis.vertical, |
| children: items.map((int item) { |
| return new Container( |
| child: new GestureDetector( |
| onTap: () { tapped.add(item); }, |
| child: new Text('$item'), |
| ), |
| ); |
| }).toList(), |
| ), |
| ), |
| ), |
| ), |
| ); |
| await tester.drag(find.text('1'), const Offset(0.0, -280.0)); |
| await tester.pump(const Duration(seconds: 1)); |
| // screen is 600px tall, and has the following items: |
| // -280..10 = 0 |
| // 10..300 = 1 |
| // 300..590 = 2 |
| // 590..880 = 3 |
| expect(find.text('0'), findsOneWidget); |
| expect(find.text('1'), findsOneWidget); |
| expect(find.text('2'), findsOneWidget); |
| expect(find.text('3'), findsOneWidget); |
| expect(find.text('4'), findsNothing); |
| expect(find.text('5'), findsNothing); |
| expect(tapped, equals(<int>[])); |
| await tester.tap(find.text('1')); |
| expect(tapped, equals(<int>[1])); |
| await tester.tap(find.text('3')); |
| expect(tapped, equals(<int>[1])); // the center of the third item is off-screen so it shouldn't get hit |
| }); |
| |
| testWidgets('Padding scroll anchor start', (WidgetTester tester) async { |
| final List<int> tapped = <int>[]; |
| |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new ListView( |
| itemExtent: 290.0, |
| padding: const EdgeInsets.fromLTRB(5.0, 20.0, 15.0, 10.0), |
| children: items.map((int item) { |
| return new Container( |
| child: new GestureDetector( |
| onTap: () { tapped.add(item); }, |
| child: new Text('$item'), |
| ), |
| ); |
| }).toList(), |
| ), |
| ), |
| ); |
| await tester.tapAt(const Offset(200.0, 19.0)); |
| expect(tapped, equals(<int>[])); |
| await tester.tapAt(const Offset(200.0, 21.0)); |
| expect(tapped, equals(<int>[0])); |
| await tester.tapAt(const Offset(4.0, 400.0)); |
| expect(tapped, equals(<int>[0])); |
| await tester.tapAt(const Offset(6.0, 400.0)); |
| expect(tapped, equals(<int>[0, 1])); |
| await tester.tapAt(const Offset(800.0 - 14.0, 400.0)); |
| expect(tapped, equals(<int>[0, 1])); |
| await tester.tapAt(const Offset(800.0 - 16.0, 400.0)); |
| expect(tapped, equals(<int>[0, 1, 1])); |
| }); |
| |
| testWidgets('Padding scroll anchor end', (WidgetTester tester) async { |
| final List<int> tapped = <int>[]; |
| |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new ListView( |
| itemExtent: 290.0, |
| reverse: true, |
| padding: const EdgeInsets.fromLTRB(5.0, 20.0, 15.0, 10.0), |
| children: items.map((int item) { |
| return new Container( |
| child: new GestureDetector( |
| onTap: () { tapped.add(item); }, |
| child: new Text('$item'), |
| ), |
| ); |
| }).toList(), |
| ), |
| ), |
| ); |
| await tester.tapAt(const Offset(200.0, 600.0 - 9.0)); |
| expect(tapped, equals(<int>[])); |
| await tester.tapAt(const Offset(200.0, 600.0 - 11.0)); |
| expect(tapped, equals(<int>[0])); |
| await tester.tapAt(const Offset(4.0, 200.0)); |
| expect(tapped, equals(<int>[0])); |
| await tester.tapAt(const Offset(6.0, 200.0)); |
| expect(tapped, equals(<int>[0, 1])); |
| await tester.tapAt(const Offset(800.0 - 14.0, 200.0)); |
| expect(tapped, equals(<int>[0, 1])); |
| await tester.tapAt(const Offset(800.0 - 16.0, 200.0)); |
| expect(tapped, equals(<int>[0, 1, 1])); |
| }); |
| |
| testWidgets('Tap immediately following clamped overscroll', (WidgetTester tester) async { |
| // Regression test for https://github.com/flutter/flutter/issues/5709 |
| final List<int> tapped = <int>[]; |
| |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new ListView( |
| itemExtent: 200.0, |
| children: items.map((int item) { |
| return new Container( |
| child: new GestureDetector( |
| onTap: () { tapped.add(item); }, |
| child: new Text('$item'), |
| ), |
| ); |
| }).toList(), |
| ), |
| ), |
| ); |
| |
| await tester.fling(find.text('0'), const Offset(0.0, 400.0), 1000.0); |
| final ScrollableState scrollable = tester.state(find.byType(Scrollable)); |
| expect(scrollable.position.pixels, equals(0.0)); |
| |
| await tester.tapAt(const Offset(200.0, 100.0)); |
| expect(tapped, equals(<int>[0])); |
| }); |
| } |