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scroll_view_test.dart
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1869 lines (1668 loc) · 59.2 KB
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// 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';
import 'package:flutter/gestures.dart' show DragStartBehavior;
import 'package:flutter/services.dart' show LogicalKeyboardKey;
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'editable_text_tester.dart';
import 'states.dart';
import 'widgets_app_tester.dart';
class ItemWidget extends StatefulWidget {
const ItemWidget({super.key, required this.value});
final String value;
@override
State<StatefulWidget> createState() => _ItemWidgetState();
}
class _ItemWidgetState extends State<ItemWidget> {
int randomInt = Random().nextInt(1000);
@override
Widget build(BuildContext context) {
return Text('${widget.value}: $randomInt');
}
}
Widget primaryScrollControllerBoilerplate({
required Widget child,
required ScrollController controller,
}) {
return Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: const MediaQueryData(),
child: PrimaryScrollController(controller: controller, child: child),
),
);
}
void main() {
const green = Color(0xFF00FF00);
testWidgets('ListView control test', (WidgetTester tester) async {
final log = <String>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ListView(
dragStartBehavior: DragStartBehavior.down,
children: kStates.map<Widget>((String state) {
return GestureDetector(
onTap: () {
log.add(state);
},
dragStartBehavior: DragStartBehavior.down,
child: Container(height: 200.0, color: const Color(0xFF0000FF), child: Text(state)),
);
}).toList(),
),
),
);
await tester.tap(find.text('Alabama'));
expect(log, equals(<String>['Alabama']));
log.clear();
expect(find.text('Nevada'), findsNothing);
await tester.drag(find.text('Alabama'), const Offset(0.0, -4000.0));
await tester.pump();
expect(find.text('Alabama'), findsNothing);
expect(tester.getCenter(find.text('Massachusetts')), equals(const Offset(400.0, 100.0)));
await tester.tap(find.text('Massachusetts'));
expect(log, equals(<String>['Massachusetts']));
log.clear();
});
testWidgets('ListView dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView(
padding: EdgeInsets.zero,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView.builder supports null items', (WidgetTester tester) async {
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.builder(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 42),
itemCount: 42,
itemBuilder: (BuildContext context, int index) {
if (index == 5) {
return null;
}
return const Text('item');
},
),
),
),
);
expect(find.text('item'), findsNWidgets(5));
});
testWidgets('ListView.builder supports null items', (WidgetTester tester) async {
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.builder(
itemCount: 42,
itemBuilder: (BuildContext context, int index) {
if (index == 5) {
return null;
}
return const Text('item');
},
),
),
),
);
expect(find.text('item'), findsNWidgets(5));
});
testWidgets('PageView supports null items in itemBuilder', (WidgetTester tester) async {
final controller = PageController(viewportFraction: 1 / 5);
addTearDown(controller.dispose);
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: PageView.builder(
itemCount: 5,
controller: controller,
itemBuilder: (BuildContext context, int index) {
if (index == 2) {
return null;
}
return const Text('item');
},
),
),
),
);
expect(find.text('item'), findsNWidgets(2));
});
testWidgets('ListView.separated supports null items in itemBuilder', (WidgetTester tester) async {
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.separated(
itemCount: 42,
separatorBuilder: (BuildContext context, int index) {
return const Text('separator');
},
itemBuilder: (BuildContext context, int index) {
if (index == 5) {
return null;
}
return const Text('item');
},
),
),
),
);
expect(find.text('item'), findsNWidgets(5));
expect(find.text('separator'), findsNWidgets(5));
});
testWidgets('ListView.builder dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.builder(
padding: EdgeInsets.zero,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
itemCount: focusNodes.length,
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('ListView.custom dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.custom(
padding: EdgeInsets.zero,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
childrenDelegate: SliverChildBuilderDelegate((BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}, childCount: focusNodes.length),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('ListView.separated dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.separated(
padding: EdgeInsets.zero,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
itemCount: focusNodes.length,
separatorBuilder: (BuildContext context, int index) => const SizedBox(),
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView.builder dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.builder(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
itemCount: focusNodes.length,
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView.count dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.count(
padding: EdgeInsets.zero,
crossAxisCount: 2,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView.extent dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.extent(
padding: EdgeInsets.zero,
maxCrossAxisExtent: 300,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('GridView.custom dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.custom(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
childrenDelegate: SliverChildBuilderDelegate((BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}, childCount: focusNodes.length),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isFalse);
});
testWidgets('ListView dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView(
padding: EdgeInsets.zero,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('ListView.builder dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.builder(
padding: EdgeInsets.zero,
itemCount: focusNodes.length,
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('ListView.custom dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.custom(
padding: EdgeInsets.zero,
childrenDelegate: SliverChildBuilderDelegate((BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}, childCount: focusNodes.length),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('ListView.separated dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: ListView.separated(
padding: EdgeInsets.zero,
itemCount: focusNodes.length,
separatorBuilder: (BuildContext context, int index) => const SizedBox(),
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('GridView dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('GridView.builder dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.builder(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
itemCount: focusNodes.length,
itemBuilder: (BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
},
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('GridView.count dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.count(
padding: EdgeInsets.zero,
crossAxisCount: 2,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('GridView.extent dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.extent(
padding: EdgeInsets.zero,
maxCrossAxisExtent: 300,
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('GridView.custom dismiss keyboard manual test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: GridView.custom(
padding: EdgeInsets.zero,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
childrenDelegate: SliverChildBuilderDelegate((BuildContext context, int index) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNodes[index],
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}, childCount: focusNodes.length),
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);
await tester.drag(finder, const Offset(0.0, -40.0));
await tester.pumpAndSettle();
expect(textField.focusNode.hasFocus, isTrue);
});
testWidgets('ListView restart ballistic activity out of range', (WidgetTester tester) async {
Widget buildListView(int n) {
return Directionality(
textDirection: TextDirection.ltr,
child: ListView(
dragStartBehavior: DragStartBehavior.down,
children: kStates.take(n).map<Widget>((String state) {
return Container(height: 200.0, color: const Color(0xFF0000FF), child: Text(state));
}).toList(),
),
);
}
await tester.pumpWidget(buildListView(30));
await tester.fling(find.byType(ListView), const Offset(0.0, -4000.0), 4000.0);
await tester.pumpWidget(buildListView(15));
await tester.pump(const Duration(milliseconds: 10));
await tester.pump(const Duration(milliseconds: 10));
await tester.pump(const Duration(milliseconds: 10));
await tester.pump(const Duration(milliseconds: 10));
await tester.pumpAndSettle();
final Viewport viewport = tester.widget(find.byType(Viewport));
expect(viewport.offset.pixels, equals(2400.0));
});
testWidgets('CustomScrollView control test', (WidgetTester tester) async {
final log = <String>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
dragStartBehavior: DragStartBehavior.down,
slivers: <Widget>[
SliverList.list(
children: kStates.map<Widget>((String state) {
return GestureDetector(
dragStartBehavior: DragStartBehavior.down,
onTap: () {
log.add(state);
},
child: Container(
height: 200.0,
color: const Color(0xFF0000FF),
child: Text(state),
),
);
}).toList(),
),
],
),
),
);
await tester.tap(find.text('Alabama'));
expect(log, equals(<String>['Alabama']));
log.clear();
expect(find.text('Nevada'), findsNothing);
await tester.drag(find.text('Alabama'), const Offset(0.0, -4000.0));
await tester.pump();
expect(find.text('Alabama'), findsNothing);
expect(tester.getCenter(find.text('Massachusetts')), equals(const Offset(400.0, 100.0)));
await tester.tap(find.text('Massachusetts'));
expect(log, equals(<String>['Massachusetts']));
log.clear();
});
testWidgets('CustomScrollView dismiss keyboard onDrag test', (WidgetTester tester) async {
final focusNodes = List<FocusNode>.generate(50, (int i) => FocusNode());
addTearDown(() {
for (final node in focusNodes) {
node.dispose();
}
});
await tester.pumpWidget(
TestWidgetsApp(
home: Center(
child: CustomScrollView(
dragStartBehavior: DragStartBehavior.down,
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
slivers: <Widget>[
SliverList.list(
children: focusNodes.map((FocusNode focusNode) {
return Container(
height: 50,
color: green,
child: TestTextField(
focusNode: focusNode,
style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
);
}).toList(),
),
],
),
),
),
);
final Finder finder = find.byType(EditableText).first;
final EditableText textField = tester.widget(finder);
await tester.showKeyboard(finder);
expect(textField.focusNode.hasFocus, isTrue);