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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 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
// Pumps and ensures that the BottomSheet animates non-linearly.
Future<void> checkNonLinearAnimation(WidgetTester tester) async {
final Offset firstPosition = tester.getCenter(find.text('One'));
await tester.pump(const Duration(milliseconds: 30));
final Offset secondPosition = tester.getCenter(find.text('One'));
await tester.pump(const Duration(milliseconds: 30));
final Offset thirdPosition = tester.getCenter(find.text('One'));
final double dyDelta1 = secondPosition.dy - firstPosition.dy;
final double dyDelta2 = thirdPosition.dy - secondPosition.dy;
// If the animation were linear, these two values would be the same.
expect(dyDelta1, isNot(moreOrLessEquals(dyDelta2, epsilon: 0.1)));
}
testWidgets('Persistent draggableScrollableSheet localHistoryEntries test', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/110123
Widget buildFrame(Widget? bottomSheet) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(),
body: const Center(child: Text('body')),
bottomSheet: bottomSheet,
floatingActionButton: const FloatingActionButton(
onPressed: null,
child: Text('fab'),
),
),
);
}
final Widget draggableScrollableSheet = DraggableScrollableSheet(
expand: false,
snap: true,
initialChildSize: 0.3,
minChildSize: 0.3,
builder: (_, ScrollController controller) {
return ListView.builder(
itemExtent: 50.0,
itemCount: 50,
itemBuilder: (_, int index) => Text('Item $index'),
controller: controller,
);
},
);
await tester.pumpWidget(buildFrame(draggableScrollableSheet));
await tester.pumpAndSettle();
expect(find.byType(BackButton).hitTestable(), findsNothing);
await tester.drag(find.text('Item 2'), const Offset(0, -200.0));
await tester.pumpAndSettle();
// We've started to drag up, we should have a back button now for a11y
expect(find.byType(BackButton).hitTestable(), findsOneWidget);
await tester.fling(find.text('Item 2'), const Offset(0, 200.0), 2000.0);
await tester.pumpAndSettle();
// BackButton should be hidden
expect(find.byType(BackButton).hitTestable(), findsNothing);
// Show the back button again
await tester.drag(find.text('Item 2'), const Offset(0, -200.0));
await tester.pumpAndSettle();
expect(find.byType(BackButton).hitTestable(), findsOneWidget);
// Remove the draggableScrollableSheet should hide the back button
await tester.pumpWidget(buildFrame(null));
expect(find.byType(BackButton).hitTestable(), findsNothing);
});
// Regression test for https://github.com/flutter/flutter/issues/83668
testWidgets('Scaffold.bottomSheet update test', (WidgetTester tester) async {
Widget buildFrame(Widget? bottomSheet) {
return MaterialApp(
home: Scaffold(
body: const Placeholder(),
bottomSheet: bottomSheet,
),
);
}
await tester.pumpWidget(buildFrame(const Text('I love Flutter!')));
await tester.pumpWidget(buildFrame(null));
// The disappearing animation has not yet been completed.
await tester.pumpWidget(buildFrame(const Text('I love Flutter!')));
});
testWidgets('Verify that a BottomSheet can be rebuilt with ScaffoldFeatureController.setState()', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
int buildCount = 0;
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
final PersistentBottomSheetController<void> bottomSheet = scaffoldKey.currentState!.showBottomSheet<void>((_) {
return Builder(
builder: (BuildContext context) {
buildCount += 1;
return Container(height: 200.0);
},
);
});
await tester.pump();
expect(buildCount, equals(1));
bottomSheet.setState!(() { });
await tester.pump();
expect(buildCount, equals(2));
});
testWidgets('Verify that a persistent BottomSheet cannot be dismissed', (WidgetTester tester) async {
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: const Center(child: Text('body')),
bottomSheet: DraggableScrollableSheet(
expand: false,
builder: (_, ScrollController controller) {
return ListView(
controller: controller,
shrinkWrap: true,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
},
),
),
));
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
await tester.drag(find.text('Two'), const Offset(0.0, 400.0));
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
});
testWidgets('Verify that a scrollable BottomSheet can be dismissed', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
scaffoldKey.currentState!.showBottomSheet<void>((BuildContext context) {
return ListView(
shrinkWrap: true,
primary: false,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
});
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
await tester.drag(find.text('Two'), const Offset(0.0, 400.0));
await tester.pumpAndSettle();
expect(find.text('Two'), findsNothing);
});
testWidgets('Verify that a BottomSheet animates non-linearly', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
scaffoldKey.currentState!.showBottomSheet<void>((BuildContext context) {
return ListView(
shrinkWrap: true,
primary: false,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
});
await tester.pump();
await checkNonLinearAnimation(tester);
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
await tester.drag(find.text('Two'), const Offset(0.0, 200.0));
await checkNonLinearAnimation(tester);
await tester.pumpAndSettle();
expect(find.text('Two'), findsNothing);
});
testWidgets('Verify that a scrollControlled BottomSheet can be dismissed', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
scaffoldKey.currentState!.showBottomSheet<void>(
(BuildContext context) {
return DraggableScrollableSheet(
expand: false,
builder: (_, ScrollController controller) {
return ListView(
shrinkWrap: true,
controller: controller,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
},
);
},
);
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
await tester.drag(find.text('Two'), const Offset(0.0, 400.0));
await tester.pumpAndSettle();
expect(find.text('Two'), findsNothing);
});
testWidgets('Verify that a persistent BottomSheet can fling up and hide the fab', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(),
body: const Center(child: Text('body')),
bottomSheet: DraggableScrollableSheet(
expand: false,
builder: (_, ScrollController controller) {
return ListView.builder(
itemExtent: 50.0,
itemCount: 50,
itemBuilder: (_, int index) => Text('Item $index'),
controller: controller,
);
},
),
floatingActionButton: const FloatingActionButton(
onPressed: null,
child: Text('fab'),
),
),
),
);
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
expect(find.byType(FloatingActionButton), findsOneWidget);
expect(find.byType(FloatingActionButton).hitTestable(), findsOneWidget);
expect(find.byType(BackButton).hitTestable(), findsNothing);
await tester.drag(find.text('Item 2'), const Offset(0, -20.0));
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
expect(find.byType(FloatingActionButton), findsOneWidget);
expect(find.byType(FloatingActionButton).hitTestable(), findsOneWidget);
await tester.fling(find.text('Item 2'), const Offset(0.0, -600.0), 2000.0);
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsNothing);
expect(find.text('Item 22'), findsOneWidget);
expect(find.byType(FloatingActionButton), findsOneWidget);
expect(find.byType(FloatingActionButton).hitTestable(), findsNothing);
});
testWidgets('Verify that a back button resets a persistent BottomSheet', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(),
body: const Center(child: Text('body')),
bottomSheet: DraggableScrollableSheet(
expand: false,
builder: (_, ScrollController controller) {
return ListView.builder(
itemExtent: 50.0,
itemCount: 50,
itemBuilder: (_, int index) => Text('Item $index'),
controller: controller,
);
},
),
floatingActionButton: const FloatingActionButton(
onPressed: null,
child: Text('fab'),
),
),
),
);
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
expect(find.byType(BackButton).hitTestable(), findsNothing);
await tester.drag(find.text('Item 2'), const Offset(0, -20.0));
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
// We've started to drag up, we should have a back button now for a11y
expect(find.byType(BackButton).hitTestable(), findsOneWidget);
await tester.tap(find.byType(BackButton));
await tester.pumpAndSettle();
expect(find.byType(BackButton).hitTestable(), findsNothing);
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
await tester.fling(find.text('Item 2'), const Offset(0.0, -600.0), 2000.0);
await tester.pumpAndSettle();
expect(find.text('Item 2'), findsNothing);
expect(find.text('Item 22'), findsOneWidget);
expect(find.byType(BackButton).hitTestable(), findsOneWidget);
await tester.tap(find.byType(BackButton));
await tester.pumpAndSettle();
expect(find.byType(BackButton).hitTestable(), findsNothing);
expect(find.text('Item 2'), findsOneWidget);
expect(find.text('Item 22'), findsNothing);
});
testWidgets('Verify that a scrollable BottomSheet hides the fab when scrolled up', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
floatingActionButton: const FloatingActionButton(
onPressed: null,
child: Text('fab'),
),
),
));
scaffoldKey.currentState!.showBottomSheet<void>(
(BuildContext context) {
return DraggableScrollableSheet(
expand: false,
builder: (_, ScrollController controller) {
return ListView(
controller: controller,
shrinkWrap: true,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
},
);
},
);
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
expect(find.byType(FloatingActionButton).hitTestable(), findsOneWidget);
await tester.drag(find.text('Two'), const Offset(0.0, -600.0));
await tester.pumpAndSettle();
expect(find.text('Two'), findsOneWidget);
expect(find.byType(FloatingActionButton), findsOneWidget);
expect(find.byType(FloatingActionButton).hitTestable(), findsNothing);
});
testWidgets('showBottomSheet()', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: Placeholder(key: key),
),
));
int buildCount = 0;
showBottomSheet<void>(
context: key.currentContext!,
builder: (BuildContext context) {
return Builder(
builder: (BuildContext context) {
buildCount += 1;
return Container(height: 200.0);
},
);
},
);
await tester.pump();
expect(buildCount, equals(1));
});
testWidgets('Scaffold removes top MediaQuery padding', (WidgetTester tester) async {
late BuildContext scaffoldContext;
late BuildContext bottomSheetContext;
await tester.pumpWidget(MaterialApp(
home: MediaQuery(
data: const MediaQueryData(
padding: EdgeInsets.all(50.0),
),
child: Scaffold(
resizeToAvoidBottomInset: false,
body: Builder(
builder: (BuildContext context) {
scaffoldContext = context;
return Container();
},
),
),
),
));
await tester.pump();
showBottomSheet<void>(
context: scaffoldContext,
builder: (BuildContext context) {
bottomSheetContext = context;
return Container();
},
);
await tester.pump();
expect(
MediaQuery.of(bottomSheetContext).padding,
const EdgeInsets.only(
bottom: 50.0,
left: 50.0,
right: 50.0,
),
);
});
testWidgets('Scaffold.bottomSheet', (WidgetTester tester) async {
final Key bottomSheetKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: const Placeholder(),
bottomSheet: Container(
key: bottomSheetKey,
alignment: Alignment.center,
height: 200.0,
child: Builder(
builder: (BuildContext context) {
return ElevatedButton(
child: const Text('showModalBottomSheet'),
onPressed: () {
showModalBottomSheet<void>(
context: context,
builder: (BuildContext context) => const Text('modal bottom sheet'),
);
},
);
},
),
),
),
),
);
expect(find.text('showModalBottomSheet'), findsOneWidget);
expect(tester.getSize(find.byKey(bottomSheetKey)), const Size(800.0, 200.0));
expect(tester.getTopLeft(find.byKey(bottomSheetKey)), const Offset(0.0, 400.0));
// Show the modal bottomSheet
await tester.tap(find.text('showModalBottomSheet'));
await tester.pumpAndSettle();
expect(find.text('modal bottom sheet'), findsOneWidget);
// Dismiss the modal bottomSheet by tapping above the sheet
await tester.tapAt(const Offset(20.0, 20.0));
await tester.pumpAndSettle();
expect(find.text('modal bottom sheet'), findsNothing);
expect(find.text('showModalBottomSheet'), findsOneWidget);
// Remove the persistent bottomSheet
await tester.pumpWidget(
const MaterialApp(
home: Scaffold(
body: Placeholder(),
),
),
);
await tester.pumpAndSettle();
expect(find.text('showModalBottomSheet'), findsNothing);
expect(find.byKey(bottomSheetKey), findsNothing);
});
// Regression test for https://github.com/flutter/flutter/issues/71435
testWidgets(
'Scaffold.bottomSheet should be updated without creating a new RO'
' when the new widget has the same key and type.',
(WidgetTester tester) async {
Widget buildFrame(String text) {
return MaterialApp(
home: Scaffold(
body: const Placeholder(),
bottomSheet: Text(text),
),
);
}
await tester.pumpWidget(buildFrame('I love Flutter!'));
final RenderParagraph renderBeforeUpdate = tester.renderObject(find.text('I love Flutter!'));
await tester.pumpWidget(buildFrame('Flutter is the best!'));
await tester.pumpAndSettle();
final RenderParagraph renderAfterUpdate = tester.renderObject(find.text('Flutter is the best!'));
expect(renderBeforeUpdate, renderAfterUpdate);
},
);
testWidgets('Verify that visual properties are passed through', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
const Color color = Colors.pink;
const double elevation = 9.0;
const ShapeBorder shape = BeveledRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(12)));
const Clip clipBehavior = Clip.antiAlias;
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
scaffoldKey.currentState!.showBottomSheet<void>((BuildContext context) {
return ListView(
shrinkWrap: true,
primary: false,
children: const <Widget>[
SizedBox(height: 100.0, child: Text('One')),
SizedBox(height: 100.0, child: Text('Two')),
SizedBox(height: 100.0, child: Text('Three')),
],
);
}, backgroundColor: color, elevation: elevation, shape: shape, clipBehavior: clipBehavior);
await tester.pumpAndSettle();
final BottomSheet bottomSheet = tester.widget(find.byType(BottomSheet));
expect(bottomSheet.backgroundColor, color);
expect(bottomSheet.elevation, elevation);
expect(bottomSheet.shape, shape);
expect(bottomSheet.clipBehavior, clipBehavior);
});
testWidgets('PersistentBottomSheetController.close dismisses the bottom sheet', (WidgetTester tester) async {
final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey();
await tester.pumpWidget(MaterialApp(
home: Scaffold(
key: scaffoldKey,
body: const Center(child: Text('body')),
),
));
final PersistentBottomSheetController<void> bottomSheet = scaffoldKey.currentState!.showBottomSheet<void>((_) {
return Builder(
builder: (BuildContext context) {
return Container(height: 200.0);
},
);
});
await tester.pump();
expect(find.byType(BottomSheet), findsOneWidget);
bottomSheet.close();
await tester.pump();
expect(find.byType(BottomSheet), findsNothing);
});
}