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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.
// This file is run as part of a reduced test set in CI on Mac and Windows
// machines.
@Tags(<String>['reduced-test-set'])
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import '../widgets/semantics_tester.dart';
void main() {
testWidgets('FlexibleSpaceBar centers title on iOS', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: TargetPlatform.android),
home: Scaffold(
appBar: AppBar(
flexibleSpace: const FlexibleSpaceBar(
title: Text('X'),
),
),
),
),
);
final Finder title = find.text('X');
Offset center = tester.getCenter(title);
Size size = tester.getSize(title);
expect(center.dx, lessThan(400.0 - size.width / 2.0));
for (final TargetPlatform platform in <TargetPlatform>[ TargetPlatform.iOS, TargetPlatform.macOS ]) {
// Clear the widget tree to avoid animating between platforms.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: platform),
home: Scaffold(
appBar: AppBar(
flexibleSpace: const FlexibleSpaceBar(
title: Text('X'),
),
),
),
),
);
center = tester.getCenter(title);
size = tester.getSize(title);
expect(center.dx, greaterThan(400.0 - size.width / 2.0));
expect(center.dx, lessThan(400.0 + size.width / 2.0));
}
});
testWidgets('FlexibleSpaceBarSettings provides settings to a FlexibleSpaceBar', (WidgetTester tester) async {
const double minExtent = 100.0;
const double initExtent = 200.0;
const double maxExtent = 300.0;
const double alpha = 0.5;
final FlexibleSpaceBarSettings customSettings = FlexibleSpaceBar.createSettings(
currentExtent: initExtent,
minExtent: minExtent,
maxExtent: maxExtent,
toolbarOpacity: alpha,
child: AppBar(
flexibleSpace: const FlexibleSpaceBar(
title: Text('title'),
background: Text('X2'),
collapseMode: CollapseMode.pin,
),
),
) as FlexibleSpaceBarSettings;
const Key dragTarget = Key('orange box');
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
key: dragTarget,
primary: true,
slivers: <Widget>[
SliverPersistentHeader(
floating: true,
pinned: true,
delegate: TestDelegate(settings: customSettings),
),
SliverToBoxAdapter(
child: Container(
height: 1200.0,
color: Colors.orange[400],
),
),
],
),
),
),
);
final RenderBox clipRect = tester.renderObject(find.byType(ClipRect).first);
final Transform transform = tester.firstWidget(
find.descendant(
of: find.byType(FlexibleSpaceBar),
matching: find.byType(Transform),
),
);
// The current (200) is half way between the min (100) and max (300) and the
// lerp values used to calculate the scale are 1 and 1.5, so we check for 1.25.
expect(transform.transform.getMaxScaleOnAxis(), 1.25);
// The space bar rect always starts fully expanded.
expect(clipRect.size.height, maxExtent);
final Element actionTextBox = tester.element(find.text('title'));
final Text textWidget = actionTextBox.widget as Text;
final DefaultTextStyle defaultTextStyle = DefaultTextStyle.of(actionTextBox);
final TextStyle effectiveStyle = defaultTextStyle.style.merge(textWidget.style);
expect(effectiveStyle.color?.alpha, 128); // Which is alpha of .5
// We drag up to fully collapse the space bar.
await tester.drag(find.byKey(dragTarget), const Offset(0, -400.0));
await tester.pumpAndSettle();
expect(clipRect.size.height, minExtent);
});
testWidgets('FlexibleSpaceBar.background is visible when using height other than kToolbarHeight', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/80451
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
toolbarHeight: 300,
flexibleSpace: const FlexibleSpaceBar(
title: Text('Title'),
background: Text('Background'),
collapseMode: CollapseMode.pin,
),
),
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverToBoxAdapter(
child: Container(
height: 1200.0,
color: Colors.orange[400],
),
),
],
),
),
),
);
final Opacity backgroundOpacity = tester.firstWidget(find.byType(Opacity));
expect(backgroundOpacity.opacity, 1.0);
});
testWidgets('Collapsed FlexibleSpaceBar has correct semantics', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
const double expandedHeight = 200;
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
const SliverAppBar(
pinned: true,
expandedHeight: expandedHeight,
title: Text('Title'),
flexibleSpace: FlexibleSpaceBar(
background: Text('Expanded title'),
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
for (int i = 0; i < 50; i++)
SizedBox(
height: 200,
child: Center(child: Text('Item $i')),
),
],
),
),
],
),
),
),
);
TestSemantics expectedSemantics = TestSemantics.root(
children: <TestSemantics>[
TestSemantics.rootChild(
id: 1,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 2,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 3,
rect: TestSemantics.fullScreen,
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
id: 4,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 9,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, expandedHeight),
children: <TestSemantics>[
TestSemantics(
id: 12,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
children: <TestSemantics>[
TestSemantics(
id: 13,
rect: const Rect.fromLTRB(0.0, 0.0, 100.0, 20.0),
flags: <SemanticsFlag>[
SemanticsFlag.isHeader,
SemanticsFlag.namesRoute,
],
label: 'Title',
textDirection: TextDirection.ltr,
),
],
),
TestSemantics(
id: 10,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
children: <TestSemantics>[
TestSemantics(
id: 11,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, expandedHeight),
label: 'Expanded title',
textDirection: TextDirection.ltr,
),
],
),
],
),
TestSemantics(
id: 14,
flags: <SemanticsFlag>[SemanticsFlag.hasImplicitScrolling],
rect: TestSemantics.fullScreen,
actions: <SemanticsAction>[SemanticsAction.scrollUp],
children: <TestSemantics>[
TestSemantics(
id: 5,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
label: 'Item 0',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 6,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
label: 'Item 1',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 7,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 2',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 8,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 3',
textDirection: TextDirection.ltr,
),
],
),
],
),
],
),
],
),
],
),
],
);
expect(semantics, hasSemantics(expectedSemantics, ignoreTransform: true));
// We drag up to fully collapse the space bar.
await tester.drag(find.text('Item 1'), const Offset(0, -600.0));
await tester.pumpAndSettle();
expectedSemantics = TestSemantics.root(
children: <TestSemantics>[
TestSemantics.rootChild(
id: 1,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 2,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 3,
rect: TestSemantics.fullScreen,
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
id: 4,
rect: TestSemantics.fullScreen,
children: <TestSemantics>[
TestSemantics(
id: 9,
// The app bar is collapsed.
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 56.0),
children: <TestSemantics>[
TestSemantics(
id: 12,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 56.0),
children: <TestSemantics>[
TestSemantics(
id: 13,
rect: const Rect.fromLTRB(0.0, 0.0, 100.0, 20.0),
flags: <SemanticsFlag>[
SemanticsFlag.isHeader,
SemanticsFlag.namesRoute,
],
label: 'Title',
textDirection: TextDirection.ltr,
),
],
),
// The flexible space bar still persists in the
// semantic tree even if it is collapsed.
TestSemantics(
id: 10,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 56.0),
children: <TestSemantics>[
TestSemantics(
id: 11,
rect: const Rect.fromLTRB(0.0, 36.0, 800.0, 92.0),
label: 'Expanded title',
textDirection: TextDirection.ltr,
),
],
),
],
),
TestSemantics(
id: 14,
flags: <SemanticsFlag>[SemanticsFlag.hasImplicitScrolling],
rect: TestSemantics.fullScreen,
actions: <SemanticsAction>[SemanticsAction.scrollUp, SemanticsAction.scrollDown],
children: <TestSemantics>[
TestSemantics(
id: 5,
rect: const Rect.fromLTRB(0.0, 150.0, 800.0, 200.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 0',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 6,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 1',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 7,
rect: const Rect.fromLTRB(0.0, 56.0, 800.0, 200.0),
label: 'Item 2',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 8,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
label: 'Item 3',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 15,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
label: 'Item 4',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 16,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 200.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 5',
textDirection: TextDirection.ltr,
),
TestSemantics(
id: 17,
rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0),
flags: <SemanticsFlag>[SemanticsFlag.isHidden],
label: 'Item 6',
textDirection: TextDirection.ltr,
),
],
),
],
),
],
),
],
),
],
),
],
);
expect(semantics, hasSemantics(expectedSemantics, ignoreTransform: true));
semantics.dispose();
});
// This is a regression test for https://github.com/flutter/flutter/issues/14227
testWidgets('FlexibleSpaceBar sets width constraints for the title', (WidgetTester tester) async {
const double titleFontSize = 20.0;
const double height = 300.0;
late double width;
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Builder(
builder: (BuildContext context) {
width = MediaQuery.sizeOf(context).width;
return CustomScrollView(
slivers: <Widget>[
SliverAppBar(
expandedHeight: height,
pinned: true,
stretch: true,
flexibleSpace: FlexibleSpaceBar(
titlePadding: EdgeInsets.zero,
title: Text(
'X' * 2000,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: const TextStyle(fontSize: titleFontSize),
),
centerTitle: false,
),
),
],
);
},
),
),
),
);
// The title is scaled and transformed to be 1.5 times bigger, when the
// FlexibleSpaceBar is fully expanded, thus we expect the width to be
// 1.5 times smaller than the full width. The height of the text is the same
// as the font size, with 10 dps bottom margin.
expect(
tester.getRect(find.byType(Text)),
Rect.fromLTRB(
0,
height - titleFontSize - 10,
(width / 1.5).floorToDouble() * 1.5,
height,
),
);
});
testWidgets('FlexibleSpaceBar sets constraints for the title - override expandedTitleScale', (WidgetTester tester) async {
const double titleFontSize = 20.0;
const double height = 300.0;
const double expandedTitleScale = 3.0;
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
expandedHeight: height,
pinned: true,
stretch: true,
flexibleSpace: FlexibleSpaceBar(
expandedTitleScale: expandedTitleScale,
titlePadding: EdgeInsets.zero,
title: Text(
'X' * 41,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: const TextStyle(fontSize: titleFontSize,),
),
centerTitle: false,
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
for (int i = 0; i < 3; i++)
SizedBox(
height: 200.0,
child: Center(child: Text('Item $i')),
),
],
),
),
],
),
),
),
);
// We drag up to fully collapse the space bar.
await tester.drag(find.text('Item 0'), const Offset(0, -600.0));
await tester.pumpAndSettle();
final Finder title = find.byType(Text).first;
final double collapsedWidth = tester.getRect(title).width;
// We drag down to fully expand the space bar.
await tester.drag(find.text('Item 2'), const Offset(0, 600.0));
await tester.pumpAndSettle();
// The title is shifted by this margin to maintain the position of the
// bottom edge.
const double bottomMargin = titleFontSize * (expandedTitleScale - 1);
// The title is scaled and transformed to be 3 times bigger, when the
// FlexibleSpaceBar is fully expanded, thus we expect the width to be
// 3 times smaller than the full width. The height of the text is the same
// as the font size, with 40 dps bottom margin to maintain its bottom position.
expect(
tester.getRect(title),
Rect.fromLTRB(
0,
height - titleFontSize - bottomMargin,
(collapsedWidth / 3).floorToDouble() * 3,
height,
),
);
});
testWidgets('FlexibleSpaceBar scaled title', (WidgetTester tester) async {
const double titleFontSize = 20.0;
const double height = 300.0;
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
const SliverAppBar(
expandedHeight: height,
pinned: true,
stretch: true,
flexibleSpace: RepaintBoundary(
child: FlexibleSpaceBar(
title: Text(
'X',
style: TextStyle(fontSize: titleFontSize,),
),
centerTitle: false,
),
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
for (int i = 0; i < 3; i += 1)
SizedBox(
height: 200.0,
child: Center(child: Text('Item $i')),
),
],
),
),
],
),
),
),
);
// We drag up to fully collapse the space bar.
await tester.drag(find.text('Item 0'), const Offset(0, -600.0));
await tester.pumpAndSettle();
final Finder flexibleSpaceBar = find.ancestor(of: find.byType(FlexibleSpaceBar), matching: find.byType(RepaintBoundary).first);
await expectLater(
flexibleSpaceBar,
matchesGoldenFile('flexible_space_bar.expanded_title_scale_default.collapsed.png')
);
// We drag down to fully expand the space bar.
await tester.drag(find.text('Item 2'), const Offset(0, 600.0));
await tester.pumpAndSettle();
await expectLater(
flexibleSpaceBar,
matchesGoldenFile('flexible_space_bar.expanded_title_scale_default.expanded.png')
);
});
testWidgets('FlexibleSpaceBar scaled title - override expandedTitleScale', (WidgetTester tester) async {
const double titleFontSize = 20.0;
const double height = 300.0;
const double expandedTitleScale = 3.0;
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
const SliverAppBar(
expandedHeight: height,
pinned: true,
stretch: true,
flexibleSpace: RepaintBoundary(
child: FlexibleSpaceBar(
title: Text(
'X',
style: TextStyle(fontSize: titleFontSize,),
),
centerTitle: false,
expandedTitleScale: expandedTitleScale,
),
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
for (int i = 0; i < 3; i += 1)
SizedBox(
height: 200.0,
child: Center(child: Text('Item $i')),
),
],
),
),
],
),
),
),
);
// We drag up to fully collapse the space bar.
await tester.drag(find.text('Item 0'), const Offset(0, -600.0));
await tester.pumpAndSettle();
final Finder flexibleSpaceBar = find.ancestor(of: find.byType(FlexibleSpaceBar), matching: find.byType(RepaintBoundary).first);
// This should match the default behavior
await expectLater(
flexibleSpaceBar,
matchesGoldenFile('flexible_space_bar.expanded_title_scale_default.collapsed.png')
);
// We drag down to fully expand the space bar.
await tester.drag(find.text('Item 2'), const Offset(0, 600.0));
await tester.pumpAndSettle();
await expectLater(
flexibleSpaceBar,
matchesGoldenFile('flexible_space_bar.expanded_title_scale_override.expanded.png')
);
});
testWidgets('FlexibleSpaceBar test titlePadding defaults', (WidgetTester tester) async {
Widget buildFrame(TargetPlatform platform, bool? centerTitle) {
return MaterialApp(
theme: ThemeData(platform: platform),
home: Scaffold(
appBar: AppBar(
flexibleSpace: FlexibleSpaceBar(
centerTitle: centerTitle,
title: const Text('X'),
),
),
),
);
}
final Finder title = find.text('X');
final Finder flexibleSpaceBar = find.byType(FlexibleSpaceBar);
Offset getTitleBottomLeft() {
return Offset(
tester.getTopLeft(title).dx,
tester.getBottomRight(flexibleSpaceBar).dy - tester.getBottomRight(title).dy,
);
}
await tester.pumpWidget(buildFrame(TargetPlatform.android, null));
expect(getTitleBottomLeft(), const Offset(72.0, 16.0));
await tester.pumpWidget(buildFrame(TargetPlatform.android, true));
expect(getTitleBottomLeft(), const Offset(390.0, 16.0));
// Clear the widget tree to avoid animating between Android and iOS.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.iOS, null));
expect(getTitleBottomLeft(), const Offset(390.0, 16.0));
await tester.pumpWidget(buildFrame(TargetPlatform.iOS, false));
expect(getTitleBottomLeft(), const Offset(72.0, 16.0));
// Clear the widget tree to avoid animating between iOS and macOS.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.macOS, null));
expect(getTitleBottomLeft(), const Offset(390.0, 16.0));
await tester.pumpWidget(buildFrame(TargetPlatform.macOS, false));
expect(getTitleBottomLeft(), const Offset(72.0, 16.0));
});
testWidgets('FlexibleSpaceBar test titlePadding override', (WidgetTester tester) async {
Widget buildFrame(TargetPlatform platform, bool? centerTitle) {
return MaterialApp(
theme: ThemeData(platform: platform),
home: Scaffold(
appBar: AppBar(
flexibleSpace: FlexibleSpaceBar(
titlePadding: EdgeInsets.zero,
centerTitle: centerTitle,
title: const Text('X'),
),
),
),
);
}
final Finder title = find.text('X');
final Finder flexibleSpaceBar = find.byType(FlexibleSpaceBar);
Offset getTitleBottomLeft() {
return Offset(
tester.getTopLeft(title).dx,
tester.getBottomRight(flexibleSpaceBar).dy - tester.getBottomRight(title).dy,
);
}
await tester.pumpWidget(buildFrame(TargetPlatform.android, null));
expect(getTitleBottomLeft(), Offset.zero);
await tester.pumpWidget(buildFrame(TargetPlatform.android, true));
expect(getTitleBottomLeft(), const Offset(390.0, 0.0));
// Clear the widget tree to avoid animating between platforms.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.iOS, null));
expect(getTitleBottomLeft(), const Offset(390.0, 0.0));
await tester.pumpWidget(buildFrame(TargetPlatform.iOS, false));
expect(getTitleBottomLeft(), Offset.zero);
// Clear the widget tree to avoid animating between platforms.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.macOS, null));
expect(getTitleBottomLeft(), const Offset(390.0, 0.0));
await tester.pumpWidget(buildFrame(TargetPlatform.macOS, false));
expect(getTitleBottomLeft(), Offset.zero);
// Clear the widget tree to avoid animating between platforms.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.windows, null));
expect(getTitleBottomLeft(), Offset.zero);
await tester.pumpWidget(buildFrame(TargetPlatform.windows, true));
expect(getTitleBottomLeft(), const Offset(390.0, 0.0));
// Clear the widget tree to avoid animating between platforms.
await tester.pumpWidget(Container(key: UniqueKey()));
await tester.pumpWidget(buildFrame(TargetPlatform.linux, null));
expect(getTitleBottomLeft(), Offset.zero);
await tester.pumpWidget(buildFrame(TargetPlatform.linux, true));
expect(getTitleBottomLeft(), const Offset(390.0, 0.0));
});
}
class TestDelegate extends SliverPersistentHeaderDelegate {
const TestDelegate({
required this.settings,
});
final FlexibleSpaceBarSettings settings;
@override
double get maxExtent => settings.maxExtent;
@override
double get minExtent => settings.minExtent;
@override
Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) {
return settings;
}
@override
bool shouldRebuild(TestDelegate oldDelegate) => false;
}