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flutter / mirrors / flutter / fe9c7f4fa7bfadaff4d4110313e0750eacc5d0e7 / . / packages / flutter / test / material / app_bar_test.dart
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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/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import '../widgets/semantics_tester.dart';
Widget buildSliverAppBarApp({
bool floating = false,
bool pinned = false,
double? collapsedHeight,
double? expandedHeight,
bool snap = false,
double toolbarHeight = kToolbarHeight,
}) {
return MaterialApp(
home: Scaffold(
body: DefaultTabController(
length: 3,
child: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar(
title: const Text('AppBar Title'),
floating: floating,
pinned: pinned,
collapsedHeight: collapsedHeight,
expandedHeight: expandedHeight,
toolbarHeight: toolbarHeight,
snap: snap,
bottom: TabBar(
tabs: <String>['A','B','C'].map<Widget>((String t) => Tab(text: 'TAB $t')).toList(),
),
),
SliverToBoxAdapter(
child: Container(
height: 1200.0,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
ScrollController primaryScrollController(WidgetTester tester) {
return PrimaryScrollController.of(tester.element(find.byType(CustomScrollView)));
}
TextStyle? _iconStyle(WidgetTester tester, IconData icon) {
final RichText iconRichText = tester.widget<RichText>(
find.descendant(of: find.byIcon(icon).first, matching: find.byType(RichText)),
);
return iconRichText.text.style;
}
void _verifyTextNotClipped(Finder textFinder, WidgetTester tester) {
final Rect clipRect = tester.getRect(find.ancestor(of: textFinder, matching: find.byType(ClipRect)).first);
final Rect textRect = tester.getRect(textFinder);
expect(textRect.top, inInclusiveRange(clipRect.top, clipRect.bottom));
expect(textRect.bottom, inInclusiveRange(clipRect.top, clipRect.bottom));
expect(textRect.left, inInclusiveRange(clipRect.left, clipRect.right));
expect(textRect.right, inInclusiveRange(clipRect.left, clipRect.right));
}
double appBarHeight(WidgetTester tester) => tester.getSize(find.byType(AppBar, skipOffstage: false)).height;
double appBarTop(WidgetTester tester) => tester.getTopLeft(find.byType(AppBar, skipOffstage: false)).dy;
double appBarBottom(WidgetTester tester) => tester.getBottomLeft(find.byType(AppBar, skipOffstage: false)).dy;
double tabBarHeight(WidgetTester tester) => tester.getSize(find.byType(TabBar, skipOffstage: false)).height;
void main() {
setUp(() {
debugResetSemanticsIdCounter();
});
testWidgets('AppBar centers title on iOS', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: TargetPlatform.android),
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
),
),
),
);
final Finder title = find.text('X');
Offset center = tester.getCenter(title);
Size size = tester.getSize(title);
expect(center.dx, lessThan(400 - 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(
title: const Text('X'),
),
),
),
);
center = tester.getCenter(title);
size = tester.getSize(title);
expect(center.dx, greaterThan(400 - size.width / 2.0), reason: 'on ${platform.name}');
expect(center.dx, lessThan(400 + size.width / 2.0), reason: 'on ${platform.name}');
// One action is still centered.
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: platform),
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
actions: const <Widget>[
Icon(Icons.thumb_up),
],
),
),
),
);
center = tester.getCenter(title);
size = tester.getSize(title);
expect(center.dx, greaterThan(400 - size.width / 2.0), reason: 'on ${platform.name}');
expect(center.dx, lessThan(400 + size.width / 2.0), reason: 'on ${platform.name}');
// Two actions is left aligned again.
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: platform),
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
actions: const <Widget>[
Icon(Icons.thumb_up),
Icon(Icons.thumb_up),
],
),
),
),
);
center = tester.getCenter(title);
size = tester.getSize(title);
expect(center.dx, lessThan(400 - size.width / 2.0), reason: 'on ${platform.name}');
}
});
testWidgets('AppBar centerTitle:true centers on Android', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: TargetPlatform.android),
home: Scaffold(
appBar: AppBar(
centerTitle: true,
title: const Text('X'),
),
),
),
);
final Finder title = find.text('X');
final Offset center = tester.getCenter(title);
final Size size = tester.getSize(title);
expect(center.dx, greaterThan(400 - size.width / 2.0));
expect(center.dx, lessThan(400 + size.width / 2.0));
});
testWidgets('AppBar centerTitle:false title start edge is 16.0 (LTR)', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
centerTitle: false,
title: const Placeholder(key: Key('X')),
),
),
),
);
final Finder titleWidget = find.byKey(const Key('X'));
expect(tester.getTopLeft(titleWidget).dx, 16.0);
expect(tester.getTopRight(titleWidget).dx, 800 - 16.0);
});
testWidgets('AppBar centerTitle:false title start edge is 16.0 (RTL)', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Directionality(
textDirection: TextDirection.rtl,
child: Scaffold(
appBar: AppBar(
centerTitle: false,
title: const Placeholder(key: Key('X')),
),
),
),
),
);
final Finder titleWidget = find.byKey(const Key('X'));
expect(tester.getTopRight(titleWidget).dx, 800.0 - 16.0);
expect(tester.getTopLeft(titleWidget).dx, 16.0);
});
testWidgets('AppBar titleSpacing:32 title start edge is 32.0 (LTR)', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
centerTitle: false,
titleSpacing: 32.0,
title: const Placeholder(key: Key('X')),
),
),
),
);
final Finder titleWidget = find.byKey(const Key('X'));
expect(tester.getTopLeft(titleWidget).dx, 32.0);
expect(tester.getTopRight(titleWidget).dx, 800 - 32.0);
});
testWidgets('AppBar titleSpacing:32 title start edge is 32.0 (RTL)', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Directionality(
textDirection: TextDirection.rtl,
child: Scaffold(
appBar: AppBar(
centerTitle: false,
titleSpacing: 32.0,
title: const Placeholder(key: Key('X')),
),
),
),
),
);
final Finder titleWidget = find.byKey(const Key('X'));
expect(tester.getTopRight(titleWidget).dx, 800.0 - 32.0);
expect(tester.getTopLeft(titleWidget).dx, 32.0);
});
testWidgets(
'AppBar centerTitle:false leading button title left edge is 72.0 (LTR)',
(WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
centerTitle: false,
title: const Text('X'),
),
// A drawer causes a leading hamburger.
drawer: const Drawer(),
),
),
);
expect(tester.getTopLeft(find.text('X')).dx, 72.0);
},
);
testWidgets(
'AppBar centerTitle:false leading button title left edge is 72.0 (RTL)',
(WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Directionality(
textDirection: TextDirection.rtl,
child: Scaffold(
appBar: AppBar(
centerTitle: false,
title: const Text('X'),
),
// A drawer causes a leading hamburger.
drawer: const Drawer(),
),
),
),
);
expect(tester.getTopRight(find.text('X')).dx, 800.0 - 72.0);
},
);
testWidgets('AppBar centerTitle:false title overflow OK', (WidgetTester tester) async {
// The app bar's title should be constrained to fit within the available space
// between the leading and actions widgets.
final Key titleKey = UniqueKey();
Widget leading = Container();
List<Widget> actions = <Widget>[];
Widget buildApp() {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
leading: leading,
centerTitle: false,
title: Container(
key: titleKey,
constraints: BoxConstraints.loose(const Size(1000.0, 1000.0)),
),
actions: actions,
),
),
);
}
await tester.pumpWidget(buildApp());
final Finder title = find.byKey(titleKey);
expect(tester.getTopLeft(title).dx, 72.0);
expect(
tester.getSize(title).width,
equals(
800.0 // Screen width.
- 56.0 // Leading button width.
- 16.0 // Leading button to title padding.
- 16.0, // Title right side padding.
),
);
actions = <Widget>[
const SizedBox(width: 100.0),
const SizedBox(width: 100.0),
];
await tester.pumpWidget(buildApp());
expect(tester.getTopLeft(title).dx, 72.0);
// The title shrinks by 200.0 to allow for the actions widgets.
expect(tester.getSize(title).width, equals(
800.0 // Screen width.
- 56.0 // Leading button width.
- 16.0 // Leading button to title padding.
- 16.0 // Title to actions padding
- 200.0,
)); // Actions' width.
leading = Container(); // AppBar will constrain the width to 24.0
await tester.pumpWidget(buildApp());
expect(tester.getTopLeft(title).dx, 72.0);
// Adding a leading widget shouldn't effect the title's size
expect(tester.getSize(title).width, equals(800.0 - 56.0 - 16.0 - 16.0 - 200.0));
});
testWidgets('AppBar centerTitle:true title overflow OK (LTR)', (WidgetTester tester) async {
// The app bar's title should be constrained to fit within the available space
// between the leading and actions widgets. When it's also centered it may
// also be start or end justified if it doesn't fit in the overall center.
final Key titleKey = UniqueKey();
double titleWidth = 700.0;
Widget? leading = Container();
List<Widget> actions = <Widget>[];
Widget buildApp() {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
leading: leading,
centerTitle: true,
title: Container(
key: titleKey,
constraints: BoxConstraints.loose(Size(titleWidth, 1000.0)),
),
actions: actions,
),
),
);
}
// Centering a title with width 700 within the 800 pixel wide test widget
// would mean that its start edge would have to be 50. The material spec says
// that the start edge of the title must be at least 72.
await tester.pumpWidget(buildApp());
final Finder title = find.byKey(titleKey);
expect(tester.getTopLeft(title).dx, 72.0);
expect(tester.getSize(title).width, equals(700.0));
// Centering a title with width 620 within the 800 pixel wide test widget
// would mean that its start edge would have to be 90. We reserve 72
// on the start and the padded actions occupy 96 on the end. That
// leaves 632, so the title is end justified but its width isn't changed.
await tester.pumpWidget(buildApp());
leading = null;
titleWidth = 620.0;
actions = <Widget>[
const SizedBox(width: 48.0),
const SizedBox(width: 48.0),
];
await tester.pumpWidget(buildApp());
expect(tester.getTopLeft(title).dx, 800 - 620 - 48 - 48 - 16);
expect(tester.getSize(title).width, equals(620.0));
});
testWidgets('AppBar centerTitle:true title overflow OK (RTL)', (WidgetTester tester) async {
// The app bar's title should be constrained to fit within the available space
// between the leading and actions widgets. When it's also centered it may
// also be start or end justified if it doesn't fit in the overall center.
final Key titleKey = UniqueKey();
double titleWidth = 700.0;
Widget? leading = Container();
List<Widget> actions = <Widget>[];
Widget buildApp() {
return MaterialApp(
home: Directionality(
textDirection: TextDirection.rtl,
child: Scaffold(
appBar: AppBar(
leading: leading,
centerTitle: true,
title: Container(
key: titleKey,
constraints: BoxConstraints.loose(Size(titleWidth, 1000.0)),
),
actions: actions,
),
),
),
);
}
// Centering a title with width 700 within the 800 pixel wide test widget
// would mean that its start edge would have to be 50. The material spec says
// that the start edge of the title must be at least 72.
await tester.pumpWidget(buildApp());
final Finder title = find.byKey(titleKey);
expect(tester.getTopRight(title).dx, 800.0 - 72.0);
expect(tester.getSize(title).width, equals(700.0));
// Centering a title with width 620 within the 800 pixel wide test widget
// would mean that its start edge would have to be 90. We reserve 72
// on the start and the padded actions occupy 96 on the end. That
// leaves 632, so the title is end justified but its width isn't changed.
await tester.pumpWidget(buildApp());
leading = null;
titleWidth = 620.0;
actions = <Widget>[
const SizedBox(width: 48.0),
const SizedBox(width: 48.0),
];
await tester.pumpWidget(buildApp());
expect(tester.getTopRight(title).dx, 620 + 48 + 48 + 16);
expect(tester.getSize(title).width, equals(620.0));
});
testWidgets('AppBar with no Scaffold', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: SizedBox(
height: kToolbarHeight,
child: AppBar(
leading: const Text('L'),
title: const Text('No Scaffold'),
actions: const <Widget>[Text('A1'), Text('A2')],
),
),
),
);
expect(find.text('L'), findsOneWidget);
expect(find.text('No Scaffold'), findsOneWidget);
expect(find.text('A1'), findsOneWidget);
expect(find.text('A2'), findsOneWidget);
});
testWidgets('AppBar render at zero size', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Center(
child: SizedBox.shrink(
child: Scaffold(
appBar: AppBar(
title: const Text('X'),
),
),
),
),
),
);
final Finder title = find.text('X');
expect(tester.getSize(title).isEmpty, isTrue);
});
testWidgets('AppBar actions are vertically centered', (WidgetTester tester) async {
final UniqueKey appBarKey = UniqueKey();
final UniqueKey leadingKey = UniqueKey();
final UniqueKey titleKey = UniqueKey();
final UniqueKey action0Key = UniqueKey();
final UniqueKey action1Key = UniqueKey();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
key: appBarKey,
leading: SizedBox(key: leadingKey, height: 50.0),
title: SizedBox(key: titleKey, height: 40.0),
actions: <Widget>[
SizedBox(key: action0Key, height: 20.0),
SizedBox(key: action1Key, height: 30.0),
],
),
),
),
);
// The vertical center of the widget with key, in global coordinates.
double yCenter(Key key) => tester.getCenter(find.byKey(key)).dy;
expect(yCenter(appBarKey), equals(yCenter(leadingKey)));
expect(yCenter(appBarKey), equals(yCenter(titleKey)));
expect(yCenter(appBarKey), equals(yCenter(action0Key)));
expect(yCenter(appBarKey), equals(yCenter(action1Key)));
});
testWidgets('AppBar drawer icon has default size', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
drawer: const Drawer(),
),
),
);
final double iconSize = const IconThemeData.fallback().size!;
expect(
tester.getSize(find.byIcon(Icons.menu)),
equals(Size(iconSize, iconSize)),
);
});
testWidgets('Material2 - AppBar drawer icon has default color', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: false,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
drawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, themeData.colorScheme.onPrimary);
});
testWidgets('Material3 - AppBar drawer icon has default color', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
drawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, themeData.colorScheme.onSurfaceVariant);
});
testWidgets('AppBar drawer icon is sized by iconTheme', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
iconTheme: const IconThemeData(size: 30),
),
drawer: const Drawer(),
),
),
);
expect(
tester.getSize(find.byIcon(Icons.menu)),
equals(const Size(30, 30)),
);
});
testWidgets('AppBar drawer icon is colored by iconTheme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(colorScheme: const ColorScheme.light());
const Color color = Color(0xFF2196F3);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
iconTheme: const IconThemeData(color: color),
),
drawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, color);
});
testWidgets('AppBar endDrawer icon has default size', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
endDrawer: const Drawer(),
),
),
);
final double iconSize = const IconThemeData.fallback().size!;
expect(
tester.getSize(find.byIcon(Icons.menu)),
equals(Size(iconSize, iconSize)),
);
});
testWidgets('Material2 - AppBar endDrawer icon has default color', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: false,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
endDrawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, themeData.colorScheme.onPrimary);
});
testWidgets('Material3 - AppBar endDrawer icon has default color', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
),
endDrawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, themeData.colorScheme.onSurfaceVariant);
});
testWidgets('AppBar endDrawer icon is sized by iconTheme', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
iconTheme: const IconThemeData(size: 30),
),
endDrawer: const Drawer(),
),
),
);
expect(
tester.getSize(find.byIcon(Icons.menu)),
equals(const Size(30, 30)),
);
});
testWidgets('AppBar endDrawer icon is colored by iconTheme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(colorScheme: const ColorScheme.light());
const Color color = Color(0xFF2196F3);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
title: const Text('Howdy!'),
iconTheme: const IconThemeData(color: color),
),
endDrawer: const Drawer(),
),
),
);
expect(_iconStyle(tester, Icons.menu)?.color, color);
});
testWidgets('Material2 - leading widget extends to edge and is square', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
platform: TargetPlatform.android,
useMaterial3: false,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
title: const Text('X'),
),
drawer: const Column(), // Doesn't really matter. Triggers a hamburger regardless.
),
),
);
// Default IconButton has a size of (56x56).
final Finder hamburger = find.byType(IconButton);
expect(tester.getTopLeft(hamburger), Offset.zero);
expect(tester.getSize(hamburger), const Size(56.0, 56.0));
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: Container(),
title: const Text('X'),
),
),
),
);
// Default leading widget has a size of (56x56).
final Finder leadingBox = find.byType(Container);
expect(tester.getTopLeft(leadingBox), Offset.zero);
expect(tester.getSize(leadingBox), const Size(56.0, 56.0));
// The custom leading widget should still be 56x56 even if its size is smaller.
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: const SizedBox(height: 36, width: 36,),
title: const Text('X'),
), // Doesn't really matter. Triggers a hamburger regardless.
),
),
);
final Finder leading = find.byType(SizedBox);
expect(tester.getTopLeft(leading), Offset.zero);
expect(tester.getSize(leading), const Size(56.0, 56.0));
});
testWidgets('Material3 - leading widget extends to edge and is square', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
platform: TargetPlatform.android,
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
title: const Text('X'),
),
drawer: const Column(), // Doesn't really matter. Triggers a hamburger regardless.
),
),
);
// Default IconButton has a size of (48x48).
final Finder hamburger = find.byType(IconButton);
expect(tester.getTopLeft(hamburger), const Offset(4.0, 4.0));
expect(tester.getSize(hamburger), const Size(48.0, 48.0));
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: Container(),
title: const Text('X'),
),
),
),
);
// Default leading widget has a size of (56x56).
final Finder leadingBox = find.byType(Container);
expect(tester.getTopLeft(leadingBox), Offset.zero);
expect(tester.getSize(leadingBox), const Size(56.0, 56.0));
// The custom leading widget should still be 56x56 even if its size is smaller.
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: const SizedBox(height: 36, width: 36,),
title: const Text('X'),
), // Doesn't really matter. Triggers a hamburger regardless.
),
),
);
final Finder leading = find.byType(SizedBox);
expect(tester.getTopLeft(leading), Offset.zero);
expect(tester.getSize(leading), const Size(56.0, 56.0));
});
testWidgets('Material2 - Action is 4dp from edge and 48dp min', (WidgetTester tester) async {
final ThemeData theme = ThemeData(
platform: TargetPlatform.android,
useMaterial3: false,
);
await tester.pumpWidget(
MaterialApp(
theme: theme,
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
actions: const <Widget> [
IconButton(
icon: Icon(Icons.share),
onPressed: null,
tooltip: 'Share',
iconSize: 20.0,
),
IconButton(
icon: Icon(Icons.add),
onPressed: null,
tooltip: 'Add',
iconSize: 60.0,
),
],
),
),
),
);
final Finder addButton = find.widgetWithIcon(IconButton, Icons.add);
expect(tester.getTopRight(addButton), const Offset(800.0, 0.0));
// It's still the size it was plus the 2 * 8dp padding from IconButton.
expect(tester.getSize(addButton), const Size(60.0 + 2 * 8.0, 56.0));
final Finder shareButton = find.widgetWithIcon(IconButton, Icons.share);
// The 20dp icon is expanded to fill the IconButton's touch target to 48dp.
expect(tester.getSize(shareButton), const Size(48.0, 56.0));
});
testWidgets('Material3 - Action is 4dp from edge and 48dp min', (WidgetTester tester) async {
final ThemeData theme = ThemeData(
platform: TargetPlatform.android,
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: theme,
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
actions: const <Widget> [
IconButton(
icon: Icon(Icons.share),
onPressed: null,
tooltip: 'Share',
iconSize: 20.0,
),
IconButton(
icon: Icon(Icons.add),
onPressed: null,
tooltip: 'Add',
iconSize: 60.0,
),
],
),
),
),
);
final Finder addButton = find.widgetWithIcon(IconButton, Icons.add);
expect(tester.getTopRight(addButton), const Offset(800.0, 0.0));
// It's still the size it was plus the 2 * 8dp padding from IconButton.
expect(tester.getSize(addButton), const Size(60.0 + 2 * 8.0, 56.0));
final Finder shareButton = find.widgetWithIcon(IconButton, Icons.share);
// The 20dp icon is expanded to fill the IconButton's touch target to 48dp.
expect(tester.getSize(shareButton), const Size(48.0, 48.0));
});
testWidgets('SliverAppBar default configuration', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp());
final ScrollController controller = primaryScrollController(tester);
expect(controller.offset, 0.0);
expect(find.byType(SliverAppBar), findsOneWidget);
final double initialAppBarHeight = appBarHeight(tester);
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar partially out of view
controller.jumpTo(50.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), initialAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
// Scroll the not-pinned appbar out of view
controller.jumpTo(600.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsNothing);
expect(appBarHeight(tester), initialAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
// Scroll the not-pinned appbar back into view
controller.jumpTo(0.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), initialAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
});
testWidgets('SliverAppBar expandedHeight, pinned', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp(
pinned: true,
expandedHeight: 128.0,
));
final ScrollController controller = primaryScrollController(tester);
expect(controller.offset, 0.0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), 128.0);
const double initialAppBarHeight = 128.0;
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar, collapsing the expanded height. At this
// point both the toolbar and the tabbar are visible.
controller.jumpTo(600.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(tabBarHeight(tester), initialTabBarHeight);
expect(appBarHeight(tester), lessThan(initialAppBarHeight));
expect(appBarHeight(tester), greaterThan(initialTabBarHeight));
// Scroll the not-pinned appbar back into view
controller.jumpTo(0.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), initialAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
});
testWidgets('SliverAppBar expandedHeight, pinned and floating', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp(
floating: true,
pinned: true,
expandedHeight: 128.0,
));
final ScrollController controller = primaryScrollController(tester);
expect(controller.offset, 0.0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), 128.0);
const double initialAppBarHeight = 128.0;
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the floating-pinned appbar, collapsing the expanded height. At this
// point only the tabBar is visible.
controller.jumpTo(600.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(tabBarHeight(tester), initialTabBarHeight);
expect(appBarHeight(tester), lessThan(initialAppBarHeight));
expect(appBarHeight(tester), initialTabBarHeight);
// Scroll the floating-pinned appbar back into view
controller.jumpTo(0.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), initialAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
});
testWidgets('SliverAppBar expandedHeight, floating with snap:true', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp(
floating: true,
snap: true,
expandedHeight: 128.0,
));
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), 128.0);
expect(appBarBottom(tester), 128.0);
// Scroll to the middle of the list. The (floating) appbar is no longer visible.
final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position;
position.jumpTo(256.00);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsNothing);
expect(appBarTop(tester), lessThanOrEqualTo(-128.0));
// Drag the scrollable up and down. The app bar should not snap open, its
// height should just track the drag offset.
TestGesture gesture = await tester.startGesture(const Offset(50.0, 256.0));
await gesture.moveBy(const Offset(0.0, 128.0)); // drag the appbar all the way open
await tester.pump();
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), 128.0);
await gesture.moveBy(const Offset(0.0, -50.0));
await tester.pump();
expect(appBarBottom(tester), 78.0); // 78 == 128 - 50
// Trigger the snap open animation: drag down and release
await gesture.moveBy(const Offset(0.0, 10.0));
await gesture.up();
// Now verify that the appbar is animating open
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
double bottom = appBarBottom(tester);
expect(bottom, greaterThan(88.0)); // 88 = 78 + 10
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
expect(appBarBottom(tester), greaterThan(bottom));
// The animation finishes when the appbar is full height.
await tester.pumpAndSettle();
expect(appBarHeight(tester), 128.0);
// Now that the app bar is open, perform the same drag scenario
// in reverse: drag the appbar up and down and then trigger the
// snap closed animation.
gesture = await tester.startGesture(const Offset(50.0, 256.0));
await gesture.moveBy(const Offset(0.0, -128.0)); // drag the appbar closed
await tester.pump();
expect(appBarBottom(tester), 0.0);
await gesture.moveBy(const Offset(0.0, 100.0));
await tester.pump();
expect(appBarBottom(tester), 100.0);
// Trigger the snap close animation: drag upwards and release
await gesture.moveBy(const Offset(0.0, -10.0));
await gesture.up();
// Now verify that the appbar is animating closed
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
bottom = appBarBottom(tester);
expect(bottom, lessThan(90.0));
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
expect(appBarBottom(tester), lessThan(bottom));
// The animation finishes when the appbar is off screen.
await tester.pumpAndSettle();
expect(appBarTop(tester), lessThanOrEqualTo(0.0));
expect(appBarBottom(tester), lessThanOrEqualTo(0.0));
});
testWidgets('SliverAppBar expandedHeight, floating and pinned with snap:true', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp(
floating: true,
pinned: true,
snap: true,
expandedHeight: 128.0,
));
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), 128.0);
expect(appBarBottom(tester), 128.0);
// Scroll to the middle of the list. The only the tab bar is visible
// because this is a pinned appbar.
final ScrollPosition position = tester.state<ScrollableState>(find.byType(Scrollable)).position;
position.jumpTo(256.0);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), kTextTabBarHeight);
// Drag the scrollable up and down. The app bar should not snap open, the
// bottom of the appbar should just track the drag offset.
TestGesture gesture = await tester.startGesture(const Offset(50.0, 200.0));
await gesture.moveBy(const Offset(0.0, 100.0));
await tester.pump();
expect(appBarHeight(tester), 100.0);
await gesture.moveBy(const Offset(0.0, -25.0));
await tester.pump();
expect(appBarHeight(tester), 75.0);
// Trigger the snap animation: drag down and release
await gesture.moveBy(const Offset(0.0, 10.0));
await gesture.up();
// Now verify that the appbar is animating open
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
final double height = appBarHeight(tester);
expect(height, greaterThan(85.0));
expect(height, lessThan(128.0));
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
expect(appBarHeight(tester), greaterThan(height));
expect(appBarHeight(tester), lessThan(128.0));
// The animation finishes when the appbar is fully expanded
await tester.pumpAndSettle();
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), 128.0);
expect(appBarBottom(tester), 128.0);
// Now that the appbar is fully expanded, Perform the same drag
// scenario in reverse: drag the appbar up and down and then trigger
// the snap closed animation.
gesture = await tester.startGesture(const Offset(50.0, 256.0));
await gesture.moveBy(const Offset(0.0, -128.0));
await tester.pump();
expect(appBarBottom(tester), kTextTabBarHeight);
await gesture.moveBy(const Offset(0.0, 100.0));
await tester.pump();
expect(appBarBottom(tester), 100.0);
// Trigger the snap close animation: drag upwards and release
await gesture.moveBy(const Offset(0.0, -10.0));
await gesture.up();
// Now verify that the appbar is animating closed
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
final double bottom = appBarBottom(tester);
expect(bottom, lessThan(90.0));
await tester.pump();
await tester.pump(const Duration(milliseconds: 50));
expect(appBarBottom(tester), lessThan(bottom));
// The animation finishes when the appbar shrinks back to its pinned height
await tester.pumpAndSettle();
expect(appBarTop(tester), lessThanOrEqualTo(0.0));
expect(appBarBottom(tester), kTextTabBarHeight);
});
testWidgets('SliverAppBar expandedHeight, collapsedHeight', (WidgetTester tester) async {
const double expandedAppBarHeight = 400.0;
const double collapsedAppBarHeight = 200.0;
await tester.pumpWidget(buildSliverAppBarApp(
collapsedHeight: collapsedAppBarHeight,
expandedHeight: expandedAppBarHeight,
));
final ScrollController controller = primaryScrollController(tester);
expect(controller.offset, 0.0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar partially out of view.
controller.jumpTo(50.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight - 50.0);
expect(tabBarHeight(tester), initialTabBarHeight);
// Scroll the not-pinned appbar out of view, to its collapsed height.
controller.jumpTo(600.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsNothing);
expect(appBarHeight(tester), collapsedAppBarHeight + initialTabBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
// Scroll the not-pinned appbar back into view.
controller.jumpTo(0.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tabBarHeight(tester), initialTabBarHeight);
});
testWidgets('Material3 - SliverAppBar.medium defaults', (WidgetTester tester) async {
final ThemeData theme = ThemeData(useMaterial3: true);
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 112;
await tester.pumpWidget(MaterialApp(
theme: theme,
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
const SliverAppBar.medium(
title: Text('AppBar Title'),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
final ScrollController controller = primaryScrollController(tester);
// There are two widgets for the title. The first title is a larger version
// that is shown at the bottom when the app bar is expanded. It scrolls under
// the main row until it is completely hidden and then the first title is
// faded in. The last is the title on the mainrow with the icons. It is
// transparent when the app bar is expanded, and opaque when it is collapsed.
final Finder expandedTitle = find.text('AppBar Title').first;
final Finder expandedTitleClip = find.ancestor(
of: expandedTitle,
matching: find.byType(ClipRect),
).first;
final Finder collapsedTitle = find.text('AppBar Title').last;
final Finder collapsedTitleOpacity = find.ancestor(
of: collapsedTitle,
matching: find.byType(AnimatedOpacity),
);
// Default, fully expanded app bar.
expect(controller.offset, 0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
// Test the expanded title is positioned correctly.
final Offset titleOffset = tester.getBottomLeft(expandedTitle);
expect(titleOffset.dx, 16.0);
if (!kIsWeb || isCanvasKit) {
expect(titleOffset.dy, 96.0);
}
_verifyTextNotClipped(expandedTitle, tester);
// Test the expanded title default color.
expect(
tester.renderObject<RenderParagraph>(expandedTitle).text.style!.color,
theme.colorScheme.onSurface,
);
// Scroll the expanded app bar partially out of view.
controller.jumpTo(45);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight - 45);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight - 45);
// Scroll so that it is completely collapsed.
controller.jumpTo(600);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), collapsedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 1);
expect(tester.getSize(expandedTitleClip).height, 0);
// Scroll back to fully expanded.
controller.jumpTo(0);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
});
testWidgets('Material3 - SliverAppBar.large defaults', (WidgetTester tester) async {
final ThemeData theme = ThemeData(useMaterial3: true);
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 152;
await tester.pumpWidget(MaterialApp(
theme: theme,
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
const SliverAppBar.large(
title: Text('AppBar Title'),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
final ScrollController controller = primaryScrollController(tester);
// There are two widgets for the title. The first title is a larger version
// that is shown at the bottom when the app bar is expanded. It scrolls under
// the main row until it is completely hidden and then the first title is
// faded in. The last is the title on the mainrow with the icons. It is
// transparent when the app bar is expanded, and opaque when it is collapsed.
final Finder expandedTitle = find.text('AppBar Title').first;
final Finder expandedTitleClip = find.ancestor(
of: expandedTitle,
matching: find.byType(ClipRect),
).first;
final Finder collapsedTitle = find.text('AppBar Title').last;
final Finder collapsedTitleOpacity = find.ancestor(
of: collapsedTitle,
matching: find.byType(AnimatedOpacity),
);
// Default, fully expanded app bar.
expect(controller.offset, 0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
// Test the expanded title is positioned correctly.
final Offset titleOffset = tester.getBottomLeft(expandedTitle);
expect(titleOffset.dx, 16.0);
final RenderSliver renderSliverAppBar = tester.renderObject(find.byType(SliverAppBar));
// The expanded title and the bottom padding fits in the flexible space.
expect(
titleOffset.dy,
renderSliverAppBar.geometry!.scrollExtent - 28.0,
reason: 'bottom padding of a large expanded title should be 28.',
);
_verifyTextNotClipped(expandedTitle, tester);
// Test the expanded title default color.
expect(
tester.renderObject<RenderParagraph>(expandedTitle).text.style!.color,
theme.colorScheme.onSurface,
);
// Scroll the expanded app bar partially out of view.
controller.jumpTo(45);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight - 45);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight - 45);
// Scroll so that it is completely collapsed.
controller.jumpTo(600);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), collapsedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 1);
expect(tester.getSize(expandedTitleClip).height, 0);
// Scroll back to fully expanded.
controller.jumpTo(0);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
});
testWidgets('Material2 - AppBar uses the specified elevation or defaults to 4.0', (WidgetTester tester) async {
Widget buildAppBar([double? elevation]) {
return MaterialApp(
theme: ThemeData(useMaterial3: false),
home: Scaffold(
appBar: AppBar(title: const Text('Title'), elevation: elevation),
),
);
}
Material getMaterial() => tester.widget<Material>(find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
));
// Default elevation should be used for the material.
await tester.pumpWidget(buildAppBar());
expect(getMaterial().elevation, 4);
// AppBar should use the specified elevation.
await tester.pumpWidget(buildAppBar(8.0));
expect(getMaterial().elevation, 8.0);
});
testWidgets('Material3 - AppBar uses the specified elevation or defaults to 0', (WidgetTester tester) async {
Widget buildAppBar([double? elevation]) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: Scaffold(
appBar: AppBar(title: const Text('Title'), elevation: elevation),
),
);
}
Material getMaterial() => tester.widget<Material>(find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
));
// Default elevation should be used for the material.
await tester.pumpWidget(buildAppBar());
expect(getMaterial().elevation, 0);
// AppBar should use the specified elevation.
await tester.pumpWidget(buildAppBar(8.0));
expect(getMaterial().elevation, 8.0);
});
testWidgets('scrolledUnderElevation', (WidgetTester tester) async {
Widget buildAppBar({double? elevation, double? scrolledUnderElevation}) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Title'),
elevation: elevation,
scrolledUnderElevation: scrolledUnderElevation,
),
body: ListView.builder(
itemCount: 100,
itemBuilder: (BuildContext context, int index) => ListTile(title: Text('Item $index')),
),
),
);
}
Material getMaterial() => tester.widget<Material>(find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
));
await tester.pumpWidget(buildAppBar(elevation: 2, scrolledUnderElevation: 10));
// Starts with the base elevation.
expect(getMaterial().elevation, 2);
await tester.fling(find.text('Item 2'), const Offset(0.0, -600.0), 2000.0);
await tester.pumpAndSettle();
// After scrolling it should be the scrolledUnderElevation.
expect(getMaterial().elevation, 10);
});
testWidgets('Material3 - scrolledUnderElevation with nested scroll view', (WidgetTester tester) async {
Widget buildAppBar({double? scrolledUnderElevation}) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: Scaffold(
appBar: AppBar(
title: const Text('Title'),
scrolledUnderElevation: scrolledUnderElevation,
notificationPredicate: (ScrollNotification notification) {
return notification.depth == 1;
},
),
body: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: 4,
itemBuilder: (BuildContext context, int index) {
return SizedBox(
height: 600.0,
width: 800.0,
child: ListView.builder(
itemCount: 100,
itemBuilder: (BuildContext context, int index) =>
ListTile(title: Text('Item $index')),
),
);
},
),
),
);
}
Material getMaterial() => tester.widget<Material>(find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
));
await tester.pumpWidget(buildAppBar(scrolledUnderElevation: 10));
// Starts with the base elevation.
expect(getMaterial().elevation, 0.0);
await tester.fling(find.text('Item 2'), const Offset(0.0, -600.0), 2000.0);
await tester.pumpAndSettle();
// After scrolling it should be the scrolledUnderElevation.
expect(getMaterial().elevation, 10);
});
group('SliverAppBar elevation', () {
Widget buildSliverAppBar(bool forceElevated, {double? elevation, double? themeElevation}) {
return MaterialApp(
theme: ThemeData(
appBarTheme: AppBarTheme(
elevation: themeElevation,
scrolledUnderElevation: themeElevation,
),
),
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
title: const Text('Title'),
forceElevated: forceElevated,
elevation: elevation,
scrolledUnderElevation: elevation,
),
],
),
);
}
testWidgets('Respects forceElevated parameter', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/59158.
AppBar getAppBar() => tester.widget<AppBar>(find.byType(AppBar));
Material getMaterial() => tester.widget<Material>(find.byType(Material));
final bool useMaterial3 = ThemeData().useMaterial3;
// When forceElevated is off, SliverAppBar should not be elevated.
await tester.pumpWidget(buildSliverAppBar(false));
expect(getMaterial().elevation, 0.0);
// Default elevation should be used by the material, but
// the AppBar's elevation should not be specified by SliverAppBar.
// When useMaterial3 is true, and forceElevated is true, the default elevation
// should be the value of `scrolledUnderElevation` which is 3.0
await tester.pumpWidget(buildSliverAppBar(true));
expect(getMaterial().elevation, useMaterial3 ? 3.0 : 4.0);
expect(getAppBar().elevation, null);
// SliverAppBar should use the specified elevation.
await tester.pumpWidget(buildSliverAppBar(true, elevation: 8.0));
expect(getMaterial().elevation, 8.0);
});
testWidgets('Uses elevation of AppBarTheme by default', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/73525.
Material getMaterial() => tester.widget<Material>(find.byType(Material));
await tester.pumpWidget(buildSliverAppBar(false, themeElevation: 12.0));
expect(getMaterial().elevation, 0.0);
await tester.pumpWidget(buildSliverAppBar(true, themeElevation: 12.0));
expect(getMaterial().elevation, 12.0);
await tester.pumpWidget(buildSliverAppBar(true, elevation: 8.0, themeElevation: 12.0));
expect(getMaterial().elevation, 8.0);
});
});
group('SliverAppBar.forceMaterialTransparency', () {
Material getSliverAppBarMaterial(WidgetTester tester) {
return tester.widget<Material>(find
.descendant(of: find.byType(SliverAppBar), matching: find.byType(Material))
.first);
}
// Generates a MaterialApp with a SliverAppBar in a CustomScrollView.
// The first cell of the scroll view contains a button at its top, and is
// initially scrolled so that it is beneath the SliverAppBar.
Widget buildWidget({
required bool forceMaterialTransparency,
required VoidCallback onPressed
}) {
const double appBarHeight = 120;
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
controller: ScrollController(initialScrollOffset:appBarHeight),
slivers: <Widget>[
SliverAppBar(
collapsedHeight: appBarHeight,
expandedHeight: appBarHeight,
pinned: true,
elevation: 0,
backgroundColor: Colors.transparent,
forceMaterialTransparency: forceMaterialTransparency,
title: const Text('AppBar'),
),
SliverList(
delegate: SliverChildBuilderDelegate((BuildContext context, int index) {
return SizedBox(
height: appBarHeight,
child: index == 0
? Align(
alignment: Alignment.topCenter,
child: TextButton(onPressed: onPressed, child: const Text('press')))
: const SizedBox(),
);
},
childCount: 20,
),
),
]),
),
);
}
testWidgets(
'forceMaterialTransparency == true allows gestures beneath the app bar', (WidgetTester tester) async {
bool buttonWasPressed = false;
final Widget widget = buildWidget(
forceMaterialTransparency:true,
onPressed:() { buttonWasPressed = true; },
);
await tester.pumpWidget(widget);
final Material material = getSliverAppBarMaterial(tester);
expect(material.type, MaterialType.transparency);
final Finder buttonFinder = find.byType(TextButton);
await tester.tap(buttonFinder);
await tester.pump();
expect(buttonWasPressed, isTrue);
});
testWidgets(
'forceMaterialTransparency == false does not allow gestures beneath the app bar', (WidgetTester tester) async {
// Set this, and tester.tap(warnIfMissed:false), to suppress
// errors/warning that the button is not hittable (which is expected).
WidgetController.hitTestWarningShouldBeFatal = false;
bool buttonWasPressed = false;
final Widget widget = buildWidget(
forceMaterialTransparency:false,
onPressed:() { buttonWasPressed = true; },
);
await tester.pumpWidget(widget);
final Material material = getSliverAppBarMaterial(tester);
expect(material.type, MaterialType.canvas);
final Finder buttonFinder = find.byType(TextButton);
await tester.tap(buttonFinder, warnIfMissed:false);
await tester.pump();
expect(buttonWasPressed, isFalse);
});
});
testWidgets('AppBar dimensions, with and without bottom, primary', (WidgetTester tester) async {
const MediaQueryData topPadding100 = MediaQueryData(padding: EdgeInsets.only(top: 100.0));
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: topPadding100,
child: Scaffold(
primary: false,
appBar: AppBar(),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), kToolbarHeight);
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: topPadding100,
child: Scaffold(
appBar: AppBar(
title: const Text('title'),
),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(tester.getTopLeft(find.text('title')).dy, greaterThan(100.0));
expect(appBarHeight(tester), kToolbarHeight + 100.0);
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: topPadding100,
child: Scaffold(
primary: false,
appBar: AppBar(
bottom: PreferredSize(
preferredSize: const Size.fromHeight(200.0),
child: Container(),
),
),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), kToolbarHeight + 200.0);
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: topPadding100,
child: Scaffold(
appBar: AppBar(
bottom: PreferredSize(
preferredSize: const Size.fromHeight(200.0),
child: Container(),
),
),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), kToolbarHeight + 100.0 + 200.0);
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: topPadding100,
child: AppBar(
primary: false,
title: const Text('title'),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(tester.getTopLeft(find.text('title')).dy, lessThan(100.0));
});
testWidgets('AppBar in body excludes bottom SafeArea padding', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/26163
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: const MediaQueryData(padding: EdgeInsets.symmetric(vertical: 100.0)),
child: Scaffold(
body: Column(
children: <Widget>[
AppBar(
title: const Text('title'),
),
],
),
),
),
),
),
);
expect(appBarTop(tester), 0.0);
expect(appBarHeight(tester), kToolbarHeight + 100.0);
});
testWidgets('AppBar.title sees the correct padding from MediaQuery', (WidgetTester tester) async {
bool titleBuilt = false;
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.ltr,
child: MediaQuery(
data: const MediaQueryData(padding: EdgeInsets.fromLTRB(12, 34, 56, 78)),
child: Scaffold(
appBar: AppBar(
title: Builder(builder: (BuildContext context) {
titleBuilt = true;
final EdgeInsets padding = MediaQuery.paddingOf(context);
expect(padding, EdgeInsets.zero);
return const Text('heh');
}),
),
),
),
),
),
);
expect(titleBuilt, isTrue);
});
testWidgets('AppBar updates when you add a drawer', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(),
),
),
);
expect(find.byIcon(Icons.menu), findsNothing);
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
drawer: const Drawer(),
appBar: AppBar(),
),
),
);
expect(find.byIcon(Icons.menu), findsOneWidget);
});
testWidgets('AppBar does not draw menu for drawer if automaticallyImplyLeading is false', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
drawer: const Drawer(),
appBar: AppBar(
automaticallyImplyLeading: false,
),
),
),
);
expect(find.byIcon(Icons.menu), findsNothing);
});
testWidgets('AppBar does not update the leading if a route is popped case 1', (WidgetTester tester) async {
final Page<void> page1 = MaterialPage<void>(
key: const ValueKey<String>('1'),
child: Scaffold(
key: const ValueKey<String>('1'),
appBar: AppBar(),
),
);
final Page<void> page2 = MaterialPage<void>(
key: const ValueKey<String>('2'),
child: Scaffold(
key: const ValueKey<String>('2'),
appBar: AppBar(),
),
);
List<Page<void>> pages = <Page<void>>[ page1 ];
await tester.pumpWidget(
MaterialApp(
home: Navigator(
pages: pages,
onPopPage: (Route<dynamic> route, dynamic result) => false,
),
),
);
expect(find.byType(BackButton), findsNothing);
// Update pages
pages = <Page<void>>[ page2 ];
await tester.pumpWidget(
MaterialApp(
home: Navigator(
pages: pages,
onPopPage: (Route<dynamic> route, dynamic result) => false,
),
),
);
expect(find.byType(BackButton), findsNothing);
});
testWidgets('AppBar does not update the leading if a route is popped case 2', (WidgetTester tester) async {
final Page<void> page1 = MaterialPage<void>(
key: const ValueKey<String>('1'),
child: Scaffold(
key: const ValueKey<String>('1'),
appBar: AppBar(),
),
);
final Page<void> page2 = MaterialPage<void>(
key: const ValueKey<String>('2'),
child: Scaffold(
key: const ValueKey<String>('2'),
appBar: AppBar(),
),
);
List<Page<void>> pages = <Page<void>>[ page1, page2 ];
await tester.pumpWidget(
MaterialApp(
home: Navigator(
pages: pages,
onPopPage: (Route<dynamic> route, dynamic result) => false,
),
),
);
// The page2 should have a back button
expect(
find.descendant(
of: find.byKey(const ValueKey<String>('2')),
matching: find.byType(BackButton),
),
findsOneWidget,
);
// Update pages
pages = <Page<void>>[ page1 ];
await tester.pumpWidget(
MaterialApp(
home: Navigator(
pages: pages,
onPopPage: (Route<dynamic> route, dynamic result) => false,
),
),
);
await tester.pump(const Duration(milliseconds: 10));
// The back button should persist during the pop animation.
expect(
find.descendant(
of: find.byKey(const ValueKey<String>('2')),
matching: find.byType(BackButton),
),
findsOneWidget,
);
});
testWidgets('Material2 - AppBar ink splash draw on the correct canvas', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/58665
final Key key = UniqueKey();
await tester.pumpWidget(
MaterialApp(
// Test was designed against InkSplash so need to make sure that is used.
theme: ThemeData(
useMaterial3: false,
splashFactory: InkSplash.splashFactory
),
home: Center(
child: AppBar(
title: const Text('Abc'),
actions: <Widget>[
IconButton(
key: key,
icon: const Icon(Icons.add_circle),
tooltip: 'First button',
onPressed: () {},
),
],
flexibleSpace: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: const Alignment(-0.04, 1.0),
colors: <Color>[Colors.blue.shade500, Colors.blue.shade800],
),
),
),
),
),
),
);
final RenderObject painter = tester.renderObject(
find.descendant(
of: find.descendant(
of: find.byType(AppBar),
matching: find.byType(Stack),
),
matching: find.byType(Material),
),
);
await tester.tap(find.byKey(key));
expect(painter, paints..save()..translate()..save()..translate()..circle(x: 24.0, y: 28.0));
});
testWidgets('Material3 - AppBar ink splash draw on the correct canvas', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/58665
final Key key = UniqueKey();
await tester.pumpWidget(
MaterialApp(
// Test was designed against InkSplash so need to make sure that is used.
theme: ThemeData(
useMaterial3: true,
splashFactory: InkSplash.splashFactory
),
home: Center(
child: AppBar(
title: const Text('Abc'),
actions: <Widget>[
IconButton(
key: key,
icon: const Icon(Icons.add_circle),
tooltip: 'First button',
onPressed: () {},
),
],
flexibleSpace: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: const Alignment(-0.04, 1.0),
colors: <Color>[Colors.blue.shade500, Colors.blue.shade800],
),
),
),
),
),
),
);
final RenderObject painter = tester.renderObject(
find.descendant(
of: find.descendant(
of: find.byType(AppBar),
matching: find.byType(Stack),
),
matching: find.byType(Material).last,
),
);
await tester.tap(find.byKey(key));
expect(painter, paints..save()..translate()..save()..translate()..circle(x: 20.0, y: 20.0));
});
testWidgets('AppBar handles loose children 0', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: Placeholder(key: key),
title: const Text('Abc'),
actions: const <Widget>[
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
],
),
),
),
);
expect(tester.renderObject<RenderBox>(find.byKey(key)).localToGlobal(Offset.zero), Offset.zero);
expect(tester.renderObject<RenderBox>(find.byKey(key)).size, const Size(56.0, 56.0));
});
testWidgets('AppBar handles loose children 1', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: Placeholder(key: key),
title: const Text('Abc'),
actions: const <Widget>[
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
],
flexibleSpace: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: const Alignment(-0.04, 1.0),
colors: <Color>[Colors.blue.shade500, Colors.blue.shade800],
),
),
),
),
),
),
);
expect(tester.renderObject<RenderBox>(find.byKey(key)).localToGlobal(Offset.zero), Offset.zero);
expect(tester.renderObject<RenderBox>(find.byKey(key)).size, const Size(56.0, 56.0));
});
testWidgets('AppBar handles loose children 2', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: Placeholder(key: key),
title: const Text('Abc'),
actions: const <Widget>[
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
],
flexibleSpace: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: const Alignment(-0.04, 1.0),
colors: <Color>[Colors.blue.shade500, Colors.blue.shade800],
),
),
),
bottom: PreferredSize(
preferredSize: const Size(0.0, kToolbarHeight),
child: Container(
height: 50.0,
padding: const EdgeInsets.all(4.0),
child: const Placeholder(
color: Color(0xFFFFFFFF),
),
),
),
),
),
),
);
expect(tester.renderObject<RenderBox>(find.byKey(key)).localToGlobal(Offset.zero), Offset.zero);
expect(tester.renderObject<RenderBox>(find.byKey(key)).size, const Size(56.0, 56.0));
});
testWidgets('AppBar handles loose children 3', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: Placeholder(key: key),
title: const Text('Abc'),
actions: const <Widget>[
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
Placeholder(fallbackWidth: 10.0),
],
bottom: PreferredSize(
preferredSize: const Size(0.0, kToolbarHeight),
child: Container(
height: 50.0,
padding: const EdgeInsets.all(4.0),
child: const Placeholder(
color: Color(0xFFFFFFFF),
),
),
),
),
),
),
);
expect(tester.renderObject<RenderBox>(find.byKey(key)).localToGlobal(Offset.zero), Offset.zero);
expect(tester.renderObject<RenderBox>(find.byKey(key)).size, const Size(56.0, 56.0));
});
testWidgets('AppBar positioning of leading and trailing widgets with top padding', (WidgetTester tester) async {
const MediaQueryData topPadding100 = MediaQueryData(padding: EdgeInsets.only(top: 100));
final Key leadingKey = UniqueKey();
final Key titleKey = UniqueKey();
final Key trailingKey = UniqueKey();
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.rtl,
child: MediaQuery(
data: topPadding100,
child: Scaffold(
primary: false,
appBar: AppBar(
leading: Placeholder(key: leadingKey), // Forced to 56x56, see _kLeadingWidth in app_bar.dart.
title: Placeholder(key: titleKey, fallbackHeight: kToolbarHeight),
actions: <Widget>[ Placeholder(key: trailingKey, fallbackWidth: 10) ],
),
),
),
),
),
);
expect(tester.getTopLeft(find.byType(AppBar)), Offset.zero);
expect(tester.getTopLeft(find.byKey(leadingKey)), const Offset(800.0 - 56.0, 100));
expect(tester.getTopLeft(find.byKey(trailingKey)), const Offset(0.0, 100));
// Because the topPadding eliminates the vertical space for the
// NavigationToolbar within the AppBar, the toolbar is constrained
// with minHeight=maxHeight=0. The _AppBarTitle widget vertically centers
// the title, so its Y coordinate relative to the toolbar is -kToolbarHeight / 2
// (-28). The top of the toolbar is at (screen coordinates) y=100, so the
// top of the title is 100 + -28 = 72. The toolbar clips its contents
// so the title isn't actually visible.
expect(tester.getTopLeft(find.byKey(titleKey)), const Offset(10 + NavigationToolbar.kMiddleSpacing, 72));
});
testWidgets('SliverAppBar positioning of leading and trailing widgets with top padding', (WidgetTester tester) async {
const MediaQueryData topPadding100 = MediaQueryData(padding: EdgeInsets.only(top: 100.0));
final Key leadingKey = UniqueKey();
final Key titleKey = UniqueKey();
final Key trailingKey = UniqueKey();
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.rtl,
child: MediaQuery(
data: topPadding100,
child: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar(
leading: Placeholder(key: leadingKey),
title: Placeholder(key: titleKey, fallbackHeight: kToolbarHeight),
actions: <Widget>[ Placeholder(key: trailingKey) ],
),
],
),
),
),
),
);
expect(tester.getTopLeft(find.byType(AppBar)), Offset.zero);
expect(tester.getTopLeft(find.byKey(leadingKey)), const Offset(800.0 - 56.0, 100.0));
expect(tester.getTopLeft(find.byKey(titleKey)), const Offset(416.0, 100.0));
expect(tester.getTopLeft(find.byKey(trailingKey)), const Offset(0.0, 100.0));
});
testWidgets('SliverAppBar positioning of leading and trailing widgets with bottom padding', (WidgetTester tester) async {
const MediaQueryData topPadding100 = MediaQueryData(padding: EdgeInsets.only(top: 100.0, bottom: 50.0));
final Key leadingKey = UniqueKey();
final Key titleKey = UniqueKey();
final Key trailingKey = UniqueKey();
await tester.pumpWidget(
Localizations(
locale: const Locale('en', 'US'),
delegates: const <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
],
child: Directionality(
textDirection: TextDirection.rtl,
child: MediaQuery(
data: topPadding100,
child: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar(
leading: Placeholder(key: leadingKey),
title: Placeholder(key: titleKey),
actions: <Widget>[ Placeholder(key: trailingKey) ],
),
],
),
),
),
),
);
expect(tester.getRect(find.byType(AppBar)), const Rect.fromLTRB(0.0, 0.0, 800.00, 100.0 + 56.0));
expect(tester.getRect(find.byKey(leadingKey)), const Rect.fromLTRB(800.0 - 56.0, 100.0, 800.0, 100.0 + 56.0));
expect(tester.getRect(find.byKey(trailingKey)), const Rect.fromLTRB(0.0, 100.0, 400.0, 100.0 + 56.0));
});
testWidgets('SliverAppBar provides correct semantics in LTR', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: const Text('Leading'),
title: const Text('Title'),
actions: const <Widget>[
Text('Action 1'),
Text('Action 2'),
Text('Action 3'),
],
bottom: const PreferredSize(
preferredSize: Size(0.0, kToolbarHeight),
child: Text('Bottom'),
),
),
),
),
);
expect(semantics, hasSemantics(
TestSemantics.root(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics> [
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
label: 'Leading',
textDirection: TextDirection.ltr,
),
TestSemantics(
flags: <SemanticsFlag>[
SemanticsFlag.namesRoute,
SemanticsFlag.isHeader,
],
label: 'Title',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 1',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 2',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 3',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Bottom',
textDirection: TextDirection.ltr,
),
],
),
],
),
],
),
],
),
],
),
ignoreRect: true,
ignoreTransform: true,
ignoreId: true,
));
semantics.dispose();
});
testWidgets('SliverAppBar provides correct semantics in RTL', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
MaterialApp(
home: Semantics(
textDirection: TextDirection.rtl,
child: Directionality(
textDirection: TextDirection.rtl,
child: Center(
child: AppBar(
leading: const Text('Leading'),
title: const Text('Title'),
actions: const <Widget>[
Text('Action 1'),
Text('Action 2'),
Text('Action 3'),
],
bottom: const PreferredSize(
preferredSize: Size(0.0, kToolbarHeight),
child: Text('Bottom'),
),
),
),
),
),
),
);
expect(semantics, hasSemantics(
TestSemantics.root(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
textDirection: TextDirection.rtl,
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
label: 'Leading',
textDirection: TextDirection.rtl,
),
TestSemantics(
flags: <SemanticsFlag>[
SemanticsFlag.namesRoute,
SemanticsFlag.isHeader,
],
label: 'Title',
textDirection: TextDirection.rtl,
),
TestSemantics(
label: 'Action 1',
textDirection: TextDirection.rtl,
),
TestSemantics(
label: 'Action 2',
textDirection: TextDirection.rtl,
),
TestSemantics(
label: 'Action 3',
textDirection: TextDirection.rtl,
),
TestSemantics(
label: 'Bottom',
textDirection: TextDirection.rtl,
),
],
),
],
),
],
),
],
),
],
),
],
),
ignoreRect: true,
ignoreTransform: true,
ignoreId: true,
));
semantics.dispose();
});
testWidgets('AppBar excludes header semantics correctly', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
MaterialApp(
home: Center(
child: AppBar(
leading: const Text('Leading'),
title: const ExcludeSemantics(child: Text('Title')),
excludeHeaderSemantics: true,
actions: const <Widget>[
Text('Action 1'),
],
),
),
),
);
expect(semantics, hasSemantics(
TestSemantics.root(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
label: 'Leading',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 1',
textDirection: TextDirection.ltr,
),
],
),
],
),
],
),
],
),
],
),
ignoreRect: true,
ignoreTransform: true,
ignoreId: true,
));
semantics.dispose();
});
testWidgets('SliverAppBar excludes header semantics correctly', (WidgetTester tester) async {
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
const MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: Text('Leading'),
flexibleSpace: ExcludeSemantics(child: Text('Title')),
actions: <Widget>[Text('Action 1')],
excludeHeaderSemantics: true,
),
],
),
),
);
expect(semantics, hasSemantics(
TestSemantics.root(
children: <TestSemantics>[
TestSemantics(
textDirection: TextDirection.ltr,
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
label: 'Leading',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 1',
textDirection: TextDirection.ltr,
),
],
),
TestSemantics(),
],
),
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.hasImplicitScrolling],
),
],
),
],
),
],
),
],
),
],
),
ignoreRect: true,
ignoreTransform: true,
ignoreId: true,
));
semantics.dispose();
});
testWidgets('SliverAppBar with flexible space has correct semantics order', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/64922.
final SemanticsTester semantics = SemanticsTester(tester);
await tester.pumpWidget(
const MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: Text('Leading'),
flexibleSpace: Text('Flexible space'),
actions: <Widget>[Text('Action 1')],
),
],
),
),
);
expect(semantics, hasSemantics(
TestSemantics.root(
children: <TestSemantics>[
TestSemantics(
textDirection: TextDirection.ltr,
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.scopesRoute],
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
children: <TestSemantics>[
TestSemantics(
label: 'Leading',
textDirection: TextDirection.ltr,
),
TestSemantics(
label: 'Action 1',
textDirection: TextDirection.ltr,
),
],
),
TestSemantics(
children: <TestSemantics>[
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.isHeader],
label: 'Flexible space',
textDirection: TextDirection.ltr,
),
],
),
],
),
TestSemantics(
flags: <SemanticsFlag>[SemanticsFlag.hasImplicitScrolling],
),
],
),
],
),
],
),
],
),
],
),
ignoreRect: true,
ignoreTransform: true,
ignoreId: true,
));
semantics.dispose();
});
testWidgets('Material2 - AppBar draws a light system bar for a dark background', (WidgetTester tester) async {
final ThemeData darkTheme = ThemeData.dark(useMaterial3: false);
await tester.pumpWidget(MaterialApp(
theme: darkTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
));
expect(darkTheme.colorScheme.brightness, Brightness.dark);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.dark,
statusBarIconBrightness: Brightness.light,
));
});
testWidgets('Material3 - AppBar draws a light system bar for a dark background', (WidgetTester tester) async {
final ThemeData darkTheme = ThemeData.dark(useMaterial3: true);
await tester.pumpWidget(MaterialApp(
theme: darkTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
));
expect(darkTheme.colorScheme.brightness, Brightness.dark);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
statusBarBrightness: Brightness.dark,
statusBarIconBrightness: Brightness.light,
));
});
testWidgets('Material2 - AppBar draws a dark system bar for a light background', (WidgetTester tester) async {
final ThemeData lightTheme = ThemeData(primarySwatch: Colors.lightBlue, useMaterial3: false);
await tester.pumpWidget(
MaterialApp(
theme: lightTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
),
);
expect(lightTheme.colorScheme.brightness, Brightness.light);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.light,
statusBarIconBrightness: Brightness.dark,
));
});
testWidgets('Material3 - AppBar draws a dark system bar for a light background', (WidgetTester tester) async {
final ThemeData lightTheme = ThemeData(useMaterial3: true);
await tester.pumpWidget(
MaterialApp(
theme: lightTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
),
);
expect(lightTheme.colorScheme.brightness, Brightness.light);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
statusBarBrightness: Brightness.light,
statusBarIconBrightness: Brightness.dark,
));
});
testWidgets('Material2 - Default system bar brightness based on AppBar background color brightness.', (WidgetTester tester) async {
Widget buildAppBar(ThemeData theme) {
return MaterialApp(
theme: theme,
home: Scaffold(
appBar: AppBar(title: const Text('Title')),
),
);
}
// Using a light theme.
{
await tester.pumpWidget(buildAppBar(ThemeData(useMaterial3: false)));
final Material appBarMaterial = tester.widget<Material>(
find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
),
);
final Brightness appBarBrightness = ThemeData.estimateBrightnessForColor(appBarMaterial.color!);
final Brightness onAppBarBrightness = appBarBrightness == Brightness.light
? Brightness.dark
: Brightness.light;
expect(SystemChrome.latestStyle, SystemUiOverlayStyle(
statusBarBrightness: appBarBrightness,
statusBarIconBrightness: onAppBarBrightness,
));
}
// Using a dark theme.
{
await tester.pumpWidget(buildAppBar(ThemeData.dark(useMaterial3: false)));
final Material appBarMaterial = tester.widget<Material>(
find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
),
);
final Brightness appBarBrightness = ThemeData.estimateBrightnessForColor(appBarMaterial.color!);
final Brightness onAppBarBrightness = appBarBrightness == Brightness.light
? Brightness.dark
: Brightness.light;
expect(SystemChrome.latestStyle, SystemUiOverlayStyle(
statusBarBrightness: appBarBrightness,
statusBarIconBrightness: onAppBarBrightness,
));
}
});
testWidgets('Material3 - Default system bar brightness based on AppBar background color brightness.', (WidgetTester tester) async {
Widget buildAppBar(ThemeData theme) {
return MaterialApp(
theme: theme,
home: Scaffold(
appBar: AppBar(title: const Text('Title')),
),
);
}
// Using a light theme.
{
await tester.pumpWidget(buildAppBar(ThemeData(useMaterial3: true)));
final Material appBarMaterial = tester.widget<Material>(
find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
),
);
final Brightness appBarBrightness = ThemeData.estimateBrightnessForColor(appBarMaterial.color!);
final Brightness onAppBarBrightness = appBarBrightness == Brightness.light
? Brightness.dark
: Brightness.light;
expect(SystemChrome.latestStyle, SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
statusBarBrightness: appBarBrightness,
statusBarIconBrightness: onAppBarBrightness,
));
}
// Using a dark theme.
{
await tester.pumpWidget(buildAppBar(ThemeData.dark(useMaterial3: true)));
final Material appBarMaterial = tester.widget<Material>(
find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
),
);
final Brightness appBarBrightness = ThemeData.estimateBrightnessForColor(appBarMaterial.color!);
final Brightness onAppBarBrightness = appBarBrightness == Brightness.light
? Brightness.dark
: Brightness.light;
expect(SystemChrome.latestStyle, SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
statusBarBrightness: appBarBrightness,
statusBarIconBrightness: onAppBarBrightness,
));
}
});
testWidgets('Material2 - Default status bar color', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
key: GlobalKey(),
theme: ThemeData.light().copyWith(
useMaterial3: false,
appBarTheme: const AppBarTheme(),
),
home: Scaffold(
appBar: AppBar(
title: const Text('title'),
),
),
),
);
expect(SystemChrome.latestStyle!.statusBarColor, null);
});
testWidgets('Material3 - Default status bar color', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
key: GlobalKey(),
theme: ThemeData.light().copyWith(
useMaterial3: true,
appBarTheme: const AppBarTheme(),
),
home: Scaffold(
appBar: AppBar(
title: const Text('title'),
),
),
),
);
expect(SystemChrome.latestStyle!.statusBarColor, Colors.transparent);
});
testWidgets('AppBar systemOverlayStyle is use to style status bar and navigation bar', (WidgetTester tester) async {
final SystemUiOverlayStyle systemOverlayStyle = SystemUiOverlayStyle.light.copyWith(
statusBarColor: Colors.red,
systemNavigationBarColor: Colors.green,
);
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
systemOverlayStyle: systemOverlayStyle,
),
),
),
);
expect(SystemChrome.latestStyle!.statusBarColor, Colors.red);
expect(SystemChrome.latestStyle!.systemNavigationBarColor, Colors.green);
});
testWidgets('Changing SliverAppBar snap from true to false', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/17598
const double appBarHeight = 256.0;
bool snap = true;
await tester.pumpWidget(
MaterialApp(
home: StatefulBuilder(
builder: (BuildContext context, StateSetter setState) {
return Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
expandedHeight: appBarHeight,
floating: true,
snap: snap,
actions: <Widget>[
TextButton(
child: const Text('snap=false'),
onPressed: () {
setState(() {
snap = false;
});
},
),
],
flexibleSpace: FlexibleSpaceBar(
background: Container(
height: appBarHeight,
color: Colors.orange,
),
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
Container(height: 1200.0, color: Colors.teal),
],
),
),
],
),
);
},
),
),
);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -100.0));
await gesture.up();
await tester.tap(find.text('snap=false'));
await tester.pumpAndSettle();
gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -100.0));
await gesture.up();
await tester.pump();
});
testWidgets('AppBar shape default', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: AppBar(
leading: const Text('L'),
title: const Text('No Scaffold'),
actions: const <Widget>[Text('A1'), Text('A2')],
),
),
);
final Finder appBarFinder = find.byType(AppBar);
AppBar getAppBarWidget(Finder finder) => tester.widget<AppBar>(finder);
expect(getAppBarWidget(appBarFinder).shape, null);
final Finder materialFinder = find.byType(Material);
Material getMaterialWidget(Finder finder) => tester.widget<Material>(finder);
expect(getMaterialWidget(materialFinder).shape, null);
});
testWidgets('AppBar with shape', (WidgetTester tester) async {
const RoundedRectangleBorder roundedRectangleBorder = RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(15.0)),
);
await tester.pumpWidget(
MaterialApp(
home: AppBar(
leading: const Text('L'),
title: const Text('No Scaffold'),
actions: const <Widget>[Text('A1'), Text('A2')],
shape: roundedRectangleBorder,
),
),
);
final Finder appBarFinder = find.byType(AppBar);
AppBar getAppBarWidget(Finder finder) => tester.widget<AppBar>(finder);
expect(getAppBarWidget(appBarFinder).shape, roundedRectangleBorder);
final Finder materialFinder = find.byType(Material);
Material getMaterialWidget(Finder finder) => tester.widget<Material>(finder);
expect(getMaterialWidget(materialFinder).shape, roundedRectangleBorder);
});
testWidgets('SliverAppBar shape default', (WidgetTester tester) async {
await tester.pumpWidget(
const MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: Text('L'),
title: Text('No Scaffold'),
actions: <Widget>[Text('A1'), Text('A2')],
),
],
),
),
);
final Finder sliverAppBarFinder = find.byType(SliverAppBar);
SliverAppBar getSliverAppBarWidget(Finder finder) => tester.widget<SliverAppBar>(finder);
expect(getSliverAppBarWidget(sliverAppBarFinder).shape, null);
final Finder materialFinder = find.byType(Material);
Material getMaterialWidget(Finder finder) => tester.widget<Material>(finder);
expect(getMaterialWidget(materialFinder).shape, null);
});
testWidgets('SliverAppBar with shape', (WidgetTester tester) async {
const RoundedRectangleBorder roundedRectangleBorder = RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(15.0)),
);
await tester.pumpWidget(
const MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: Text('L'),
title: Text('No Scaffold'),
actions: <Widget>[Text('A1'), Text('A2')],
shape: roundedRectangleBorder,
),
],
),
),
);
final Finder sliverAppBarFinder = find.byType(SliverAppBar);
SliverAppBar getSliverAppBarWidget(Finder finder) => tester.widget<SliverAppBar>(finder);
expect(getSliverAppBarWidget(sliverAppBarFinder).shape, roundedRectangleBorder);
final Finder materialFinder = find.byType(Material);
Material getMaterialWidget(Finder finder) => tester.widget<Material>(finder);
expect(getMaterialWidget(materialFinder).shape, roundedRectangleBorder);
});
testWidgets('AppBars title has upper limit on text scaling, textScaleFactor = 1, 1.34, 2', (WidgetTester tester) async {
late double textScaleFactor;
Widget buildFrame() {
return MaterialApp(
// Test designed against 2014 font sizes.
theme: ThemeData(textTheme: Typography.englishLike2014),
home: Builder(
builder: (BuildContext context) {
return MediaQuery(
data: MediaQuery.of(context).copyWith(textScaleFactor: textScaleFactor),
child: Scaffold(
appBar: AppBar(
centerTitle: false,
title: const Text('Jumbo', style: TextStyle(fontSize: 18)),
),
),
);
},
),
);
}
final Finder appBarTitle = find.text('Jumbo');
textScaleFactor = 1;
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle).height, 18);
textScaleFactor = 1.34;
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle).height, 24);
textScaleFactor = 2;
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle).height, 24);
});
testWidgets('AppBars with jumbo titles, textScaleFactor = 3, 3.5, 4', (WidgetTester tester) async {
double textScaleFactor = 1.0;
TextDirection textDirection = TextDirection.ltr;
bool centerTitle = false;
Widget buildFrame() {
return MaterialApp(
// Test designed against 2014 font sizes.
theme: ThemeData(textTheme: Typography.englishLike2014),
home: Builder(
builder: (BuildContext context) {
return Directionality(
textDirection: textDirection,
child: Builder(
builder: (BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: centerTitle,
title: MediaQuery(
data: MediaQuery.of(context).copyWith(textScaleFactor: textScaleFactor),
child: const Text('Jumbo'),
),
),
);
},
),
);
},
),
);
}
final Finder appBarTitle = find.text('Jumbo');
final Finder toolbar = find.byType(NavigationToolbar);
// Overall screen size is 800x600
// Left or right justified title is padded by 16 on the "start" side.
// Toolbar height is 56.
// "Jumbo" title is 100x20.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(16, 18, 116, 38));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
textScaleFactor = 3; // "Jumbo" title is 300x60.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(16, -2, 316, 58));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
textScaleFactor = 3.5; // "Jumbo" title is 350x70.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(16, -7, 366, 63));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
textScaleFactor = 4; // "Jumbo" title is 400x80.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(16, -12, 416, 68));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
textDirection = TextDirection.rtl; // Changed to rtl. "Jumbo" title is still 400x80.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(800.0 - 400.0 - 16.0, -12, 800.0 - 16.0, 68));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
centerTitle = true; // Changed to true. "Jumbo" title is still 400x80.
await tester.pumpWidget(buildFrame());
expect(tester.getRect(appBarTitle), const Rect.fromLTRB(200, -12, 800.0 - 200.0, 68));
expect(tester.getCenter(appBarTitle).dy, tester.getCenter(toolbar).dy);
});
testWidgets('SliverAppBar configures the delegate properly', (WidgetTester tester) async {
Future<void> buildAndVerifyDelegate({ required bool pinned, required bool floating, required bool snap }) async {
await tester.pumpWidget(
MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
title: const Text('Jumbo'),
pinned: pinned,
floating: floating,
snap: snap,
),
],
),
),
);
final SliverPersistentHeaderDelegate delegate = tester
.widget<SliverPersistentHeader>(find.byType(SliverPersistentHeader))
.delegate;
// Ensure we have a non-null vsync when it's needed.
if (!floating || (delegate.snapConfiguration == null && delegate.showOnScreenConfiguration == null)) {
expect(delegate.vsync, isNotNull);
}
expect(delegate.showOnScreenConfiguration != null, snap && floating);
}
await buildAndVerifyDelegate(pinned: false, floating: true, snap: false);
await buildAndVerifyDelegate(pinned: false, floating: true, snap: true);
await buildAndVerifyDelegate(pinned: true, floating: true, snap: false);
await buildAndVerifyDelegate(pinned: true, floating: true, snap: true);
});
testWidgets('AppBar respects toolbarHeight', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Title'),
toolbarHeight: 48,
),
body: Container(),
),
),
);
expect(appBarHeight(tester), 48);
});
testWidgets('SliverAppBar default collapsedHeight with respect to toolbarHeight', (WidgetTester tester) async {
const double toolbarHeight = 100.0;
await tester.pumpWidget(buildSliverAppBarApp(
toolbarHeight: toolbarHeight,
));
final ScrollController controller = primaryScrollController(tester);
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar out of view, to its collapsed height.
controller.jumpTo(300.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsNothing);
// By default, the collapsedHeight is toolbarHeight + bottom.preferredSize.height,
// in this case initialTabBarHeight.
expect(appBarHeight(tester), toolbarHeight + initialTabBarHeight);
});
testWidgets('SliverAppBar collapsedHeight with toolbarHeight', (WidgetTester tester) async {
const double toolbarHeight = 100.0;
const double collapsedHeight = 150.0;
await tester.pumpWidget(buildSliverAppBarApp(
toolbarHeight: toolbarHeight,
collapsedHeight: collapsedHeight,
));
final ScrollController controller = primaryScrollController(tester);
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar out of view, to its collapsed height.
controller.jumpTo(300.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsNothing);
expect(appBarHeight(tester), collapsedHeight + initialTabBarHeight);
});
testWidgets('SliverAppBar collapsedHeight', (WidgetTester tester) async {
const double collapsedHeight = 56.0;
await tester.pumpWidget(buildSliverAppBarApp(
collapsedHeight: collapsedHeight,
));
final ScrollController controller = primaryScrollController(tester);
final double initialTabBarHeight = tabBarHeight(tester);
// Scroll the not-pinned appbar out of view, to its collapsed height.
controller.jumpTo(300.0);
await tester.pump();
expect(find.byType(SliverAppBar), findsNothing);
expect(appBarHeight(tester), collapsedHeight + initialTabBarHeight);
});
testWidgets('AppBar respects leadingWidth', (WidgetTester tester) async {
const Key key = Key('leading');
await tester.pumpWidget(MaterialApp(
home: Scaffold(
appBar: AppBar(
leading: const Placeholder(key: key),
leadingWidth: 100,
title: const Text('Title'),
),
),
));
// By default toolbarHeight is 56.0.
expect(tester.getRect(find.byKey(key)), const Rect.fromLTRB(0, 0, 100, 56));
});
testWidgets('SliverAppBar respects leadingWidth', (WidgetTester tester) async {
const Key key = Key('leading');
await tester.pumpWidget(const MaterialApp(
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: Placeholder(key: key),
leadingWidth: 100,
title: Text('Title'),
),
],
),
));
// By default toolbarHeight is 56.0.
expect(tester.getRect(find.byKey(key)), const Rect.fromLTRB(0, 0, 100, 56));
});
testWidgets("AppBar with EndDrawer doesn't have leading", (WidgetTester tester) async {
await tester.pumpWidget(MaterialApp(
home: Scaffold(
appBar: AppBar(),
endDrawer: const Drawer(),
),
));
final Finder endDrawerFinder = find.byTooltip('Open navigation menu');
await tester.tap(endDrawerFinder);
await tester.pump();
final Finder appBarFinder = find.byType(NavigationToolbar);
NavigationToolbar getAppBarWidget(Finder finder) => tester.widget<NavigationToolbar>(finder);
expect(getAppBarWidget(appBarFinder).leading, null);
});
testWidgets('AppBar.titleSpacing defaults to NavigationToolbar.kMiddleSpacing', (WidgetTester tester) async {
await tester.pumpWidget(MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Title'),
),
),
));
final NavigationToolbar navToolBar = tester.widget(find.byType(NavigationToolbar));
expect(navToolBar.middleSpacing, NavigationToolbar.kMiddleSpacing);
});
testWidgets('SliverAppBar.titleSpacing defaults to NavigationToolbar.kMiddleSpacing', (WidgetTester tester) async {
await tester.pumpWidget(buildSliverAppBarApp());
final NavigationToolbar navToolBar = tester.widget(find.byType(NavigationToolbar));
expect(navToolBar.middleSpacing, NavigationToolbar.kMiddleSpacing);
});
testWidgets('AppBar foregroundColor and backgroundColor', (WidgetTester tester) async {
const Color foregroundColor = Color(0xff00ff00);
const Color backgroundColor = Color(0xff00ffff);
final Key leadingIconKey = UniqueKey();
final Key actionIconKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
foregroundColor: foregroundColor,
backgroundColor: backgroundColor,
leading: Icon(Icons.add_circle, key: leadingIconKey),
title: const Text('title'),
actions: <Widget>[Icon(Icons.ac_unit, key: actionIconKey), const Text('action')],
),
),
),
);
final Material appBarMaterial = tester.widget<Material>(
find.descendant(
of: find.byType(AppBar),
matching: find.byType(Material),
),
);
expect(appBarMaterial.color, backgroundColor);
final TextStyle titleTextStyle = tester.widget<DefaultTextStyle>(
find.ancestor(of: find.text('title'), matching: find.byType(DefaultTextStyle)).first,
).style;
expect(titleTextStyle.color, foregroundColor);
final IconThemeData leadingIconTheme = tester.widget<IconTheme>(
find.ancestor(of: find.byKey(leadingIconKey), matching: find.byType(IconTheme)).first,
).data;
expect(leadingIconTheme.color, foregroundColor);
final IconThemeData actionIconTheme = tester.widget<IconTheme>(
find.ancestor(of: find.byKey(actionIconKey), matching: find.byType(IconTheme)).first,
).data;
expect(actionIconTheme.color, foregroundColor);
// Test icon color
Color? leadingIconColor() => _iconStyle(tester, Icons.add_circle)?.color;
Color? actionIconColor() => _iconStyle(tester, Icons.ac_unit)?.color;
expect(leadingIconColor(), foregroundColor);
expect(actionIconColor(), foregroundColor);
});
testWidgets('Leading, title, and actions show correct default colors', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(
onPrimary: Colors.blue,
onSurface: Colors.red,
onSurfaceVariant: Colors.yellow),
);
final bool material3 = themeData.useMaterial3;
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
leading: const Icon(Icons.add_circle),
title: const Text('title'),
actions: const <Widget>[
Icon(Icons.ac_unit)
],
),
),
),
);
Color textColor() {
return tester.renderObject<RenderParagraph>(find.text('title')).text.style!.color!;
}
Color? leadingIconColor() => _iconStyle(tester, Icons.add_circle)?.color;
Color? actionIconColor() => _iconStyle(tester, Icons.ac_unit)?.color;
// M2 default color are onPrimary, and M3 has onSurface for leading and title,
// onSurfaceVariant for actions.
expect(textColor(), material3 ? Colors.red : Colors.blue);
expect(leadingIconColor(), material3 ? Colors.red : Colors.blue);
expect(actionIconColor(), material3 ? Colors.yellow : Colors.blue);
});
// Regression test for https://github.com/flutter/flutter/issues/107305
group('Material3 - Icons are colored correctly by IconTheme and ActionIconTheme', () {
testWidgets('Material3 - Icons and IconButtons are colored by IconTheme', (WidgetTester tester) async {
const Color iconColor = Color(0xff00ff00);
final Key leadingIconKey = UniqueKey();
final Key actionIconKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
theme: ThemeData.from(
colorScheme: const ColorScheme.light(), useMaterial3: true),
home: Scaffold(
appBar: AppBar(
iconTheme: const IconThemeData(color: iconColor),
leading: Icon(Icons.add_circle, key: leadingIconKey),
title: const Text('title'),
actions: <Widget>[
Icon(Icons.ac_unit, key: actionIconKey),
IconButton(icon: const Icon(Icons.add), onPressed: () {},)
],
),
),
),
);
Color? leadingIconColor() => _iconStyle(tester, Icons.add_circle)?.color;
Color? actionIconColor() => _iconStyle(tester, Icons.ac_unit)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconColor(), iconColor);
expect(actionIconColor(), iconColor);
expect(actionIconButtonColor(), iconColor);
});
testWidgets('Material3 - Action icons and IconButtons are colored by ActionIconTheme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: true,
);
const Color actionsIconColor = Color(0xff0000ff);
final Key leadingIconKey = UniqueKey();
final Key actionIconKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
actionsIconTheme: const IconThemeData(color: actionsIconColor),
leading: Icon(Icons.add_circle, key: leadingIconKey),
title: const Text('title'),
actions: <Widget>[
Icon(Icons.ac_unit, key: actionIconKey),
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconColor() => _iconStyle(tester, Icons.add_circle)?.color;
Color? actionIconColor() => _iconStyle(tester, Icons.ac_unit)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconColor(), themeData.colorScheme.onSurface);
expect(actionIconColor(), actionsIconColor);
expect(actionIconButtonColor(), actionsIconColor);
});
testWidgets('Material3 - The actionIconTheme property overrides iconTheme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData.from(
colorScheme: const ColorScheme.light(),
useMaterial3: true,
);
const Color overallIconColor = Color(0xff00ff00);
const Color actionsIconColor = Color(0xff0000ff);
final Key leadingIconKey = UniqueKey();
final Key actionIconKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
iconTheme: const IconThemeData(color: overallIconColor),
actionsIconTheme: const IconThemeData(color: actionsIconColor),
leading: Icon(Icons.add_circle, key: leadingIconKey),
title: const Text('title'),
actions: <Widget>[
Icon(Icons.ac_unit, key: actionIconKey),
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconColor() => _iconStyle(tester, Icons.add_circle)?.color;
Color? actionIconColor() => _iconStyle(tester, Icons.ac_unit)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconColor(), overallIconColor);
expect(actionIconColor(), actionsIconColor);
expect(actionIconButtonColor(), actionsIconColor);
});
testWidgets('Material3 - AppBar.iconTheme should override any IconButtonTheme present in the theme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
iconButtonTheme: IconButtonThemeData(
style: IconButton.styleFrom(
foregroundColor: Colors.red,
iconSize: 32.0,
),
),
useMaterial3: true,
);
const IconThemeData overallIconTheme = IconThemeData(color: Colors.yellow, size: 30.0);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
iconTheme: overallIconTheme,
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
title: const Text('title'),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
double? leadingIconButtonSize() => _iconStyle(tester, Icons.menu)?.fontSize;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
double? actionIconButtonSize() => _iconStyle(tester, Icons.menu)?.fontSize;
expect(leadingIconButtonColor(), Colors.yellow);
expect(leadingIconButtonSize(), 30.0);
expect(actionIconButtonColor(), Colors.yellow);
expect(actionIconButtonSize(), 30.0);
});
testWidgets('Material3 - AppBar.iconTheme should override any IconButtonTheme present in the theme for widgets containing an iconButton', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
iconButtonTheme: IconButtonThemeData(
style: IconButton.styleFrom(
foregroundColor: Colors.red,
iconSize: 32.0,
),
),
useMaterial3: true,
);
const IconThemeData overallIconTheme = IconThemeData(color: Colors.yellow, size: 30.0);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
iconTheme: overallIconTheme,
leading: BackButton(onPressed: () {}),
title: const Text('title'),
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.arrow_back)?.color;
double? leadingIconButtonSize() => _iconStyle(tester, Icons.arrow_back)?.fontSize;
expect(leadingIconButtonColor(), Colors.yellow);
expect(leadingIconButtonSize(), 30.0);
});
testWidgets('Material3 - AppBar.actionsIconTheme should override any IconButtonTheme present in the theme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
iconButtonTheme: IconButtonThemeData(
style: IconButton.styleFrom(
foregroundColor: Colors.red,
iconSize: 32.0,
),
),
useMaterial3: true,
);
const IconThemeData actionsIconTheme = IconThemeData(color: Colors.yellow, size: 30.0);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
actionsIconTheme: actionsIconTheme,
title: const Text('title'),
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
double? leadingIconButtonSize() => _iconStyle(tester, Icons.menu)?.fontSize;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
double? actionIconButtonSize() => _iconStyle(tester, Icons.add)?.fontSize;
// The leading icon button uses the style in the IconButtonTheme because only actionsIconTheme is provided.
expect(leadingIconButtonColor(), Colors.red);
expect(leadingIconButtonSize(), 32.0);
expect(actionIconButtonColor(), Colors.yellow);
expect(actionIconButtonSize(), 30.0);
});
testWidgets('Material3 - AppBar.actionsIconTheme should override any IconButtonTheme present in the theme for widgets containing an iconButton', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
iconButtonTheme: IconButtonThemeData(
style: IconButton.styleFrom(
foregroundColor: Colors.red,
iconSize: 32.0,
),
),
useMaterial3: true,
);
const IconThemeData actionsIconTheme = IconThemeData(color: Colors.yellow, size: 30.0);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
actionsIconTheme: actionsIconTheme,
title: const Text('title'),
actions: <Widget>[
BackButton(onPressed: () {}),
],
),
),
),
);
Color? actionIconButtonColor() => _iconStyle(tester, Icons.arrow_back)?.color;
double? actionIconButtonSize() => _iconStyle(tester, Icons.arrow_back)?.fontSize;
expect(actionIconButtonColor(), Colors.yellow);
expect(actionIconButtonSize(), 30.0);
});
testWidgets('Material3 - The foregroundColor property of the AppBar overrides any IconButtonTheme present in the theme', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
iconButtonTheme: IconButtonThemeData(
style: IconButton.styleFrom(
foregroundColor: Colors.red,
),
),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
foregroundColor: Colors.purple,
title: const Text('title'),
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconButtonColor(), Colors.purple);
expect(actionIconButtonColor(), Colors.purple);
});
// This is a regression test for https://github.com/flutter/flutter/issues/130485.
testWidgets('Material3 - AppBar.iconTheme is correctly applied in dark mode', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
colorScheme: const ColorScheme.dark().copyWith(onSurfaceVariant: Colors.red),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
iconTheme: const IconThemeData(color: Colors.white),
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconButtonColor(), Colors.white);
expect(actionIconButtonColor(), Colors.white);
});
// This is a regression test for https://github.com/flutter/flutter/issues/130485.
testWidgets('Material3 - AppBar.foregroundColor is correctly applied in dark mode', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
colorScheme: const ColorScheme.dark().copyWith(onSurfaceVariant: Colors.red),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
foregroundColor: Colors.white,
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconButtonColor(), Colors.white);
expect(actionIconButtonColor(), Colors.white);
});
// This is a regression test for https://github.com/flutter/flutter/issues/130485.
testWidgets('Material3 - AppBar.iconTheme is correctly applied in light mode', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
colorScheme: const ColorScheme.light().copyWith(onSurfaceVariant: Colors.red),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
iconTheme: const IconThemeData(color: Colors.black87),
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconButtonColor(), Colors.black87);
expect(actionIconButtonColor(), Colors.black87);
});
// This is a regression test for https://github.com/flutter/flutter/issues/130485.
testWidgets('Material3 - AppBar.foregroundColor is correctly applied in light mode', (WidgetTester tester) async {
final ThemeData themeData = ThemeData(
colorScheme: const ColorScheme.light().copyWith(onSurfaceVariant: Colors.red),
useMaterial3: true,
);
await tester.pumpWidget(
MaterialApp(
theme: themeData,
home: Scaffold(
appBar: AppBar(
foregroundColor: Colors.black87,
leading: IconButton(icon: const Icon(Icons.menu), onPressed: () {}),
actions: <Widget>[
IconButton(icon: const Icon(Icons.add), onPressed: () {}),
],
),
),
),
);
Color? leadingIconButtonColor() => _iconStyle(tester, Icons.menu)?.color;
Color? actionIconButtonColor() => _iconStyle(tester, Icons.add)?.color;
expect(leadingIconButtonColor(), Colors.black87);
expect(actionIconButtonColor(), Colors.black87);
});
});
group('MaterialStateColor scrolledUnder', () {
const double collapsedHeight = kToolbarHeight;
const double expandedHeight = 200.0;
const Color scrolledColor = Color(0xff00ff00);
const Color defaultColor = Color(0xff0000ff);
Finder findAppBarMaterial() {
return find.descendant(of: find.byType(AppBar), matching: find.byType(Material)).first;
}
Color? getAppBarBackgroundColor(WidgetTester tester) {
return tester.widget<Material>(findAppBarMaterial()).color;
}
group('SliverAppBar', () {
Widget buildSliverApp({
required double contentHeight,
bool reverse = false,
bool includeFlexibleSpace = false,
}) {
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
reverse: reverse,
slivers: <Widget>[
SliverAppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder)
? scrolledColor
: defaultColor;
}),
expandedHeight: expandedHeight,
pinned: true,
flexibleSpace: includeFlexibleSpace
? const FlexibleSpaceBar(title: Text('SliverAppBar'))
: null,
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
Container(height: contentHeight, color: Colors.teal),
],
),
),
],
),
),
);
}
testWidgets('backgroundColor', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(contentHeight: 1200.0)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, collapsedHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('backgroundColor with FlexibleSpace', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(contentHeight: 1200.0, includeFlexibleSpace: true)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, collapsedHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('backgroundColor - reverse', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(contentHeight: 1200.0, reverse: true)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, collapsedHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, -expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('backgroundColor with FlexibleSpace - reverse', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(
contentHeight: 1200.0,
reverse: true,
includeFlexibleSpace: true,
)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, collapsedHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, -expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('backgroundColor - not triggered in reverse for short content', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(contentHeight: 200, reverse: true)
);
// In reverse, the content here is not long enough to scroll under the app
// bar.
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
final TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('backgroundColor with FlexibleSpace - not triggered in reverse for short content', (WidgetTester tester) async {
await tester.pumpWidget(
buildSliverApp(
contentHeight: 200,
reverse: true,
includeFlexibleSpace: true,
)
);
// In reverse, the content here is not long enough to scroll under the app
// bar.
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
final TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, expandedHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
});
group('AppBar', () {
Widget buildAppBar({
required double contentHeight,
bool reverse = false,
bool includeFlexibleSpace = false
}) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder)
? scrolledColor
: defaultColor;
}),
title: const Text('AppBar'),
flexibleSpace: includeFlexibleSpace
? const FlexibleSpaceBar(title: Text('FlexibleSpace'))
: null,
),
body: ListView(
reverse: reverse,
children: <Widget>[
Container(height: contentHeight, color: Colors.teal),
],
),
),
);
}
testWidgets('backgroundColor for horizontal scrolling', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder)
? scrolledColor
: defaultColor;
}),
title: const Text('AppBar'),
notificationPredicate: (ScrollNotification notification) {
// Represents both scroll views below being treated as a
// single viewport.
return notification.depth <= 1;
},
),
body: SingleChildScrollView(
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Container(
height: 1200,
width: 1200,
color: Colors.teal,
),
),
),
),
)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await tester.pump();
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
// Scroll horizontally
await gesture.moveBy(const Offset(-kToolbarHeight, 0.0));
await tester.pump();
await gesture.moveBy(const Offset(-kToolbarHeight, 0.0));
await gesture.up();
await tester.pumpAndSettle();
// The app bar is still scrolled under vertically, so it should not have
// changed back in response to horizontal scrolling.
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('backgroundColor', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(contentHeight: 1200.0)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('backgroundColor with FlexibleSpace', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(contentHeight: 1200.0, includeFlexibleSpace: true)
);
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('backgroundColor - reverse', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(contentHeight: 1200.0, reverse: true)
);
await tester.pump();
// In this test case, the content always extends under the AppBar, so it
// should always be the scrolledColor.
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('backgroundColor with FlexibleSpace - reverse', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(
contentHeight: 1200.0,
reverse: true,
includeFlexibleSpace: true,
)
);
await tester.pump();
// In this test case, the content always extends under the AppBar, so it
// should always be the scrolledColor.
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
gesture = await tester.startGesture(const Offset(50.0, 300.0));
await gesture.moveBy(const Offset(0.0, -kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), scrolledColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('_handleScrollNotification safely calls setState()', (WidgetTester tester) async {
// Regression test for failures found in Google internal issue b/185192049.
final ScrollController controller = ScrollController(initialScrollOffset: 400);
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: Scrollbar(
thumbVisibility: true,
controller: controller,
child: ListView(
controller: controller,
children: <Widget>[
Container(height: 1200.0, color: Colors.teal),
],
),
),
),
),
);
expect(tester.takeException(), isNull);
});
testWidgets('does not trigger on horizontal scroll', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
appBar: AppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder)
? scrolledColor
: defaultColor;
}),
title: const Text('AppBar'),
),
body: ListView(
scrollDirection: Axis.horizontal,
children: <Widget>[
Container(height: 600.0, width: 1200.0, color: Colors.teal),
],
),
),
),
);
expect(getAppBarBackgroundColor(tester), defaultColor);
TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(-100.0, 0.0));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(100.0, 0.0));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
});
testWidgets('backgroundColor - not triggered in reverse for short content', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(
contentHeight: 200.0,
reverse: true,
)
);
await tester.pump();
// In reverse, the content here is not long enough to scroll under the app
// bar.
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
final TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
testWidgets('backgroundColor with FlexibleSpace - not triggered in reverse for short content', (WidgetTester tester) async {
await tester.pumpWidget(
buildAppBar(
contentHeight: 200.0,
reverse: true,
includeFlexibleSpace: true,
)
);
await tester.pump();
// In reverse, the content here is not long enough to scroll under the app
// bar.
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
final TestGesture gesture = await tester.startGesture(const Offset(50.0, 400.0));
await gesture.moveBy(const Offset(0.0, kToolbarHeight));
await gesture.up();
await tester.pumpAndSettle();
expect(getAppBarBackgroundColor(tester), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, kToolbarHeight);
});
});
});
// Regression test for https://github.com/flutter/flutter/issues/80256
testWidgets('The second page should have a back button even it has a end drawer', (WidgetTester tester) async {
final Page<void> page1 = MaterialPage<void>(
key: const ValueKey<String>('1'),
child: Scaffold(
key: const ValueKey<String>('1'),
appBar: AppBar(),
endDrawer: const Drawer(),
)
);
final Page<void> page2 = MaterialPage<void>(
key: const ValueKey<String>('2'),
child: Scaffold(
key: const ValueKey<String>('2'),
appBar: AppBar(),
endDrawer: const Drawer(),
)
);
final List<Page<void>> pages = <Page<void>>[ page1, page2 ];
await tester.pumpWidget(
MaterialApp(
home: Navigator(
pages: pages,
onPopPage: (Route<Object?> route, Object? result) => false,
),
),
);
// The page2 should have a back button.
expect(
find.descendant(
of: find.byKey(const ValueKey<String>('2')),
matching: find.byType(BackButton),
),
findsOneWidget
);
});
testWidgets('Only local entries that imply app bar dismissal will introduce an back button', (WidgetTester tester) async {
final GlobalKey key = GlobalKey();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
key: key,
appBar: AppBar(),
),
),
);
expect(find.byType(BackButton), findsNothing);
// Push one entry that doesn't imply app bar dismissal.
ModalRoute.of(key.currentContext!)!.addLocalHistoryEntry(
LocalHistoryEntry(onRemove: () {}, impliesAppBarDismissal: false),
);
await tester.pump();
expect(find.byType(BackButton), findsNothing);
// Push one entry that implies app bar dismissal.
ModalRoute.of(key.currentContext!)!.addLocalHistoryEntry(
LocalHistoryEntry(onRemove: () {}),
);
await tester.pump();
expect(find.byType(BackButton), findsOneWidget);
});
testWidgets('AppBar.preferredHeightFor', (WidgetTester tester) async {
late double preferredHeight;
late Size preferredSize;
Widget buildFrame({ double? themeToolbarHeight, double? appBarToolbarHeight }) {
final AppBar appBar = AppBar(
toolbarHeight: appBarToolbarHeight,
);
return MaterialApp(
theme: ThemeData.light().copyWith(
appBarTheme: AppBarTheme(
toolbarHeight: themeToolbarHeight,
),
),
home: Builder(
builder: (BuildContext context) {
preferredHeight = AppBar.preferredHeightFor(context, appBar.preferredSize);
preferredSize = appBar.preferredSize;
return Scaffold(
appBar: appBar,
body: const Placeholder(),
);
},
),
);
}
await tester.pumpWidget(buildFrame());
expect(tester.getSize(find.byType(AppBar)).height, kToolbarHeight);
expect(preferredHeight, kToolbarHeight);
expect(preferredSize.height, kToolbarHeight);
await tester.pumpWidget(buildFrame(themeToolbarHeight: 96));
await tester.pumpAndSettle(); // Animate MaterialApp theme change.
expect(tester.getSize(find.byType(AppBar)).height, 96);
expect(preferredHeight, 96);
// Special case: AppBarTheme.toolbarHeight specified,
// AppBar.theme.toolbarHeight is null.
expect(preferredSize.height, kToolbarHeight);
await tester.pumpWidget(buildFrame(appBarToolbarHeight: 64));
await tester.pumpAndSettle(); // Animate MaterialApp theme change.
expect(tester.getSize(find.byType(AppBar)).height, 64);
expect(preferredHeight, 64);
expect(preferredSize.height, 64);
await tester.pumpWidget(buildFrame(appBarToolbarHeight: 64, themeToolbarHeight: 96));
await tester.pumpAndSettle(); // Animate MaterialApp theme change.
expect(tester.getSize(find.byType(AppBar)).height, 64);
expect(preferredHeight, 64);
expect(preferredSize.height, 64);
});
testWidgets('AppBar title with actions should have the same position regardless of centerTitle', (WidgetTester tester) async {
final Key titleKey = UniqueKey();
bool centerTitle = false;
Widget buildApp() {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
centerTitle: centerTitle,
title: Container(
key: titleKey,
constraints: BoxConstraints.loose(const Size(1000.0, 1000.0)),
),
actions: const <Widget>[
SizedBox(width: 48.0),
],
),
),
);
}
await tester.pumpWidget(buildApp());
final Finder title = find.byKey(titleKey);
expect(tester.getTopLeft(title).dx, 16.0);
centerTitle = true;
await tester.pumpWidget(buildApp());
expect(tester.getTopLeft(title).dx, 16.0);
});
testWidgets('AppBar leading widget can take up arbitrary space', (WidgetTester tester) async {
final Key leadingKey = UniqueKey();
final Key titleKey = UniqueKey();
late double leadingWidth;
Widget buildApp() {
return MaterialApp(
home: LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
leadingWidth = constraints.maxWidth / 2;
return Scaffold(
appBar: AppBar(
leading: Container(
key: leadingKey,
width: leadingWidth,
),
leadingWidth: leadingWidth,
title: Text('Title', key: titleKey),
),
);
}
),
);
}
await tester.pumpWidget(buildApp());
expect(tester.getTopLeft(find.byKey(titleKey)).dx, leadingWidth + 16.0);
expect(tester.getSize(find.byKey(leadingKey)).width, leadingWidth);
});
testWidgets(
'SliverAppBar.medium collapsed title does not overlap with leading/actions widgets',
(WidgetTester tester) async {
const String title = 'Medium SliverAppBar Very Long Title';
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.symmetric(horizontal: 200),
sliver: SliverAppBar.medium(
leading: IconButton(
icon: const Icon(Icons.menu),
onPressed: () {},
),
title: const Text(title, maxLines: 1),
centerTitle: true,
actions: const <Widget>[
Icon(Icons.search),
Icon(Icons.sort),
Icon(Icons.more_vert),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
// Scroll to collapse the SliverAppBar.
final ScrollController controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
final Offset leadingOffset = tester.getTopRight(find.byIcon(Icons.menu));
Offset titleOffset = tester.getTopLeft(find.text(title).last);
// The title widget should be to the right of the leading widget.
expect(titleOffset.dx, greaterThan(leadingOffset.dx));
titleOffset = tester.getTopRight(find.text(title).last);
final Offset searchOffset = tester.getTopLeft(find.byIcon(Icons.search));
// The title widget should be to the left of the search icon.
expect(titleOffset.dx, lessThan(searchOffset.dx));
});
testWidgets(
'SliverAppBar.large collapsed title does not overlap with leading/actions widgets',
(WidgetTester tester) async {
const String title = 'Large SliverAppBar Very Long Title';
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.symmetric(horizontal: 200),
sliver: SliverAppBar.large(
leading: IconButton(
icon: const Icon(Icons.menu),
onPressed: () {},
),
title: const Text(title, maxLines: 1),
centerTitle: true,
actions: const <Widget>[
Icon(Icons.search),
Icon(Icons.sort),
Icon(Icons.more_vert),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
// Scroll to collapse the SliverAppBar.
final ScrollController controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
final Offset leadingOffset = tester.getTopRight(find.byIcon(Icons.menu));
Offset titleOffset = tester.getTopLeft(find.text(title).last);
// The title widget should be to the right of the leading widget.
expect(titleOffset.dx, greaterThan(leadingOffset.dx));
titleOffset = tester.getTopRight(find.text(title).last);
final Offset searchOffset = tester.getTopLeft(find.byIcon(Icons.search));
// The title widget should be to the left of the search icon.
expect(titleOffset.dx, lessThan(searchOffset.dx));
});
testWidgets('SliverAppBar.medium respects title spacing', (WidgetTester tester) async {
const String title = 'Medium SliverAppBar Very Long Title';
const double titleSpacing = 16.0;
Widget buildWidget({double? titleSpacing, bool? centerTitle}) {
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.symmetric(horizontal: 200),
sliver: SliverAppBar.medium(
leading: IconButton(
onPressed: () {},
icon: const Icon(Icons.menu),
),
title: const Text(title, maxLines: 1),
centerTitle: centerTitle,
titleSpacing: titleSpacing,
actions: <Widget>[
IconButton(onPressed: () {}, icon: const Icon(Icons.sort)),
IconButton(onPressed: () {}, icon: const Icon(Icons.more_vert)),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
);
}
await tester.pumpWidget(buildWidget());
final Finder collapsedTitle = find.text(title).last;
// Scroll to collapse the SliverAppBar.
ScrollController controller = primaryScrollController(tester);
controller.jumpTo(120);
await tester.pumpAndSettle();
// By default, title widget should be to the right of the
// leading widget and title spacing should be respected.
Offset titleOffset = tester.getTopLeft(collapsedTitle);
Offset iconButtonOffset = tester.getTopRight(find.ancestor(of: find.widgetWithIcon(IconButton, Icons.menu), matching: find.byType(ConstrainedBox)));
expect(titleOffset.dx, iconButtonOffset.dx + titleSpacing);
await tester.pumpWidget(buildWidget(centerTitle: true));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(120);
await tester.pumpAndSettle();
// By default, title widget should be to the left of the first
// trailing widget and title spacing should be respected.
titleOffset = tester.getTopRight(collapsedTitle);
iconButtonOffset = tester.getTopLeft(find.widgetWithIcon(IconButton, Icons.sort));
expect(titleOffset.dx, iconButtonOffset.dx - titleSpacing);
// Test custom title spacing, set to 0.0.
await tester.pumpWidget(buildWidget(titleSpacing: 0.0));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(120);
await tester.pumpAndSettle();
// The title widget should be to the right of the leading
// widget with no spacing.
titleOffset = tester.getTopLeft(collapsedTitle);
iconButtonOffset = tester.getTopRight(find.ancestor(of: find.widgetWithIcon(IconButton, Icons.menu), matching: find.byType(ConstrainedBox)));
expect(titleOffset.dx, iconButtonOffset.dx);
// Set centerTitle to true so the end of the title can reach
// the action widgets.
await tester.pumpWidget(buildWidget(titleSpacing: 0.0, centerTitle: true));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(120);
await tester.pumpAndSettle();
// The title widget should be to the left of the first
// leading widget with no spacing.
titleOffset = tester.getTopRight(collapsedTitle);
iconButtonOffset = tester.getTopLeft(find.widgetWithIcon(IconButton, Icons.sort));
expect(titleOffset.dx, iconButtonOffset.dx);
});
testWidgets('SliverAppBar.large respects title spacing', (WidgetTester tester) async {
const String title = 'Large SliverAppBar Very Long Title';
const double titleSpacing = 16.0;
Widget buildWidget({double? titleSpacing, bool? centerTitle}) {
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.symmetric(horizontal: 200),
sliver: SliverAppBar.large(
leading: IconButton(
onPressed: () {},
icon: const Icon(Icons.menu),
),
title: const Text(title, maxLines: 1),
centerTitle: centerTitle,
titleSpacing: titleSpacing,
actions: <Widget>[
IconButton(onPressed: () {}, icon: const Icon(Icons.sort)),
IconButton(onPressed: () {}, icon: const Icon(Icons.more_vert)),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
);
}
await tester.pumpWidget(buildWidget());
final Finder collapsedTitle = find.text(title).last;
// Scroll to collapse the SliverAppBar.
ScrollController controller = primaryScrollController(tester);
controller.jumpTo(160);
await tester.pumpAndSettle();
// By default, title widget should be to the right of the leading
// widget and title spacing should be respected.
Offset titleOffset = tester.getTopLeft(collapsedTitle);
Offset iconButtonOffset = tester.getTopRight(find.ancestor(of: find.widgetWithIcon(IconButton, Icons.menu), matching: find.byType(ConstrainedBox)));
expect(titleOffset.dx, iconButtonOffset.dx + titleSpacing);
await tester.pumpWidget(buildWidget(centerTitle: true));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(160);
await tester.pumpAndSettle();
// By default, title widget should be to the left of the
// leading widget and title spacing should be respected.
titleOffset = tester.getTopRight(collapsedTitle);
iconButtonOffset = tester.getTopLeft(find.widgetWithIcon(IconButton, Icons.sort));
expect(titleOffset.dx, iconButtonOffset.dx - titleSpacing);
// Test custom title spacing, set to 0.0.
await tester.pumpWidget(buildWidget(titleSpacing: 0.0));
controller = primaryScrollController(tester);
controller.jumpTo(160);
await tester.pumpAndSettle();
// The title widget should be to the right of the leading
// widget with no spacing.
titleOffset = tester.getTopLeft(collapsedTitle);
iconButtonOffset = tester.getTopRight(find.ancestor(of: find.widgetWithIcon(IconButton, Icons.menu), matching: find.byType(ConstrainedBox)));
expect(titleOffset.dx, iconButtonOffset.dx);
// Set centerTitle to true so the end of the title can reach
// the action widgets.
await tester.pumpWidget(buildWidget(titleSpacing: 0.0, centerTitle: true));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(160);
await tester.pumpAndSettle();
// The title widget should be to the left of the first
// leading widget with no spacing.
titleOffset = tester.getTopRight(collapsedTitle);
iconButtonOffset = tester.getTopLeft(find.widgetWithIcon(IconButton, Icons.sort));
expect(titleOffset.dx, iconButtonOffset.dx);
});
testWidgets(
'SliverAppBar.medium without the leading widget updates collapsed title padding',
(WidgetTester tester) async {
const String title = 'Medium SliverAppBar Title';
const double leadingPadding = 56.0;
const double titleSpacing = 16.0;
Widget buildWidget({ bool showLeading = true }) {
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar.medium(
automaticallyImplyLeading: false,
leading: showLeading
? IconButton(
icon: const Icon(Icons.menu),
onPressed: () {},
)
: null,
title: const Text(title),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
);
}
await tester.pumpWidget(buildWidget());
final Finder collapsedTitle = find.text(title).last;
// Scroll to collapse the SliverAppBar.
ScrollController controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
// If the leading widget is present, the title widget should be to the
// right of the leading widget and title spacing should be respected.
Offset titleOffset = tester.getTopLeft(collapsedTitle);
expect(titleOffset.dx, leadingPadding + titleSpacing);
// Hide the leading widget.
await tester.pumpWidget(buildWidget(showLeading: false));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
// If the leading widget is not present, the title widget will
// only have the default title spacing.
titleOffset = tester.getTopLeft(collapsedTitle);
expect(titleOffset.dx, titleSpacing);
});
testWidgets(
'SliverAppBar.large without the leading widget updates collapsed title padding',
(WidgetTester tester) async {
const String title = 'Large SliverAppBar Title';
const double leadingPadding = 56.0;
const double titleSpacing = 16.0;
Widget buildWidget({ bool showLeading = true }) {
return MaterialApp(
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar.large(
automaticallyImplyLeading: false,
leading: showLeading
? IconButton(
icon: const Icon(Icons.menu),
onPressed: () {},
)
: null,
title: const Text(title),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
);
}
await tester.pumpWidget(buildWidget());
final Finder collapsedTitle = find.text(title).last;
// Scroll CustomScrollView to collapse SliverAppBar.
ScrollController controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
// If the leading widget is present, the title widget should be to the
// right of the leading widget and title spacing should be respected.
Offset titleOffset = tester.getTopLeft(collapsedTitle);
expect(titleOffset.dx, leadingPadding + titleSpacing);
// Hide the leading widget.
await tester.pumpWidget(buildWidget(showLeading: false));
// Scroll to collapse the SliverAppBar.
controller = primaryScrollController(tester);
controller.jumpTo(45);
await tester.pumpAndSettle();
// If the leading widget is not present, the title widget will
// only have the default title spacing.
titleOffset = tester.getTopLeft(collapsedTitle);
expect(titleOffset.dx, titleSpacing);
});
testWidgets(
'SliverAppBar large & medium title respects automaticallyImplyLeading',
(WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/121511
const String title = 'AppBar Title';
const double titleSpacing = 16.0;
Widget buildWidget() {
return MaterialApp(
home: Scaffold(
body: Builder(
builder: (BuildContext context) {
return Center(
child: FilledButton(
onPressed: () {
Navigator.push(context, MaterialPageRoute<void>(
builder: (BuildContext context) {
return Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
const SliverAppBar.large(
title: Text(title),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
);
},
));
},
child: const Text('Go to page'),
),
);
}
),
),
);
}
await tester.pumpWidget(buildWidget());
expect(find.byType(BackButton), findsNothing);
await tester.tap(find.byType(FilledButton));
await tester.pumpAndSettle();
final Finder collapsedTitle = find.text(title).last;
final Offset backButtonOffset = tester.getTopRight(find.byType(BackButton));
final Offset titleOffset = tester.getTopLeft(collapsedTitle);
expect(titleOffset.dx, backButtonOffset.dx + titleSpacing);
});
testWidgets('SliverAppBar.medium with bottom widget', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/115091
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 112;
const double bottomHeight = 48;
const String title = 'Medium App Bar';
Widget buildWidget() {
return MaterialApp(
home: DefaultTabController(
length: 3,
child: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar.medium(
leading: IconButton(
onPressed: () {},
icon: const Icon(Icons.menu),
),
title: const Text(title),
bottom: const TabBar(
tabs: <Widget>[
Tab(text: 'Tab 1'),
Tab(text: 'Tab 2'),
Tab(text: 'Tab 3'),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildWidget());
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight + bottomHeight);
final Finder expandedTitle = find.text(title).first;
final Offset expandedTitleOffset = tester.getBottomLeft(expandedTitle);
final Offset tabOffset = tester.getTopLeft(find.byType(TabBar));
expect(expandedTitleOffset.dy, tabOffset.dy);
// Scroll CustomScrollView to collapse SliverAppBar.
final ScrollController controller = primaryScrollController(tester);
controller.jumpTo(160);
await tester.pumpAndSettle();
expect(appBarHeight(tester), collapsedAppBarHeight + bottomHeight);
});
testWidgets('SliverAppBar.large with bottom widget', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/115091
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 152;
const double bottomHeight = 48;
const String title = 'Large App Bar';
Widget buildWidget() {
return MaterialApp(
home: DefaultTabController(
length: 3,
child: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
SliverAppBar.large(
leading: IconButton(
onPressed: () {},
icon: const Icon(Icons.menu),
),
title: const Text(title),
bottom: const TabBar(
tabs: <Widget>[
Tab(text: 'Tab 1'),
Tab(text: 'Tab 2'),
Tab(text: 'Tab 3'),
],
),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildWidget());
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight + bottomHeight);
final Finder expandedTitle = find.text(title).first;
final Offset expandedTitleOffset = tester.getBottomLeft(expandedTitle);
final Offset tabOffset = tester.getTopLeft(find.byType(TabBar));
expect(expandedTitleOffset.dy, tabOffset.dy);
// Scroll CustomScrollView to collapse SliverAppBar.
final ScrollController controller = primaryScrollController(tester);
controller.jumpTo(200);
await tester.pumpAndSettle();
expect(appBarHeight(tester), collapsedAppBarHeight + bottomHeight);
});
testWidgets('SliverAppBar.medium expanded title has upper limit on text scaling', (WidgetTester tester) async {
const String title = 'Medium AppBar';
Widget buildAppBar({double textScaleFactor = 1.0}) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: MediaQuery(
data: MediaQueryData(textScaleFactor: textScaleFactor),
child: Material(
child: CustomScrollView(
slivers: <Widget>[
const SliverAppBar.medium(
title: Text(title),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildAppBar());
final Finder expandedTitle = find.text(title).first;
expect(tester.getRect(expandedTitle).height, 32.0);
_verifyTextNotClipped(expandedTitle, tester);
await tester.pumpWidget(buildAppBar(textScaleFactor: 2.0));
expect(tester.getRect(expandedTitle).height, 43.0);
_verifyTextNotClipped(expandedTitle, tester);
await tester.pumpWidget(buildAppBar(textScaleFactor: 3.0));
expect(tester.getRect(expandedTitle).height, 43.0);
_verifyTextNotClipped(expandedTitle, tester);
}, skip: kIsWeb && !isCanvasKit); // https://github.com/flutter/flutter/issues/99933
testWidgets('SliverAppBar.large expanded title has upper limit on text scaling', (WidgetTester tester) async {
const String title = 'Large AppBar';
Widget buildAppBar({double textScaleFactor = 1.0}) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: MediaQuery(
data: MediaQueryData(textScaleFactor: textScaleFactor),
child: Material(
child: CustomScrollView(
slivers: <Widget>[
const SliverAppBar.large(
title: Text(title, maxLines: 1),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildAppBar());
final Finder expandedTitle = find.text(title).first;
expect(tester.getRect(expandedTitle).height, 36.0);
await tester.pumpWidget(buildAppBar(textScaleFactor: 2.0));
expect(tester.getRect(expandedTitle).height, closeTo(48.0, 0.1));
await tester.pumpWidget(buildAppBar(textScaleFactor: 3.0));
expect(tester.getRect(expandedTitle).height, closeTo(48.0, 0.1));
}, skip: kIsWeb && !isCanvasKit); // https://github.com/flutter/flutter/issues/99933
testWidgets('SliverAppBar.medium expanded title position is adjusted with textScaleFactor', (WidgetTester tester) async {
const String title = 'Medium AppBar';
Widget buildAppBar({double textScaleFactor = 1.0}) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: MediaQuery(
data: MediaQueryData(textScaleFactor: textScaleFactor),
child: Material(
child: CustomScrollView(
slivers: <Widget>[
const SliverAppBar.medium(
title: Text(title, maxLines: 1),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildAppBar());
final Finder expandedTitle = find.text(title).first;
expect(tester.getBottomLeft(expandedTitle).dy, 96.0);
_verifyTextNotClipped(expandedTitle, tester);
await tester.pumpWidget(buildAppBar(textScaleFactor: 2.0));
expect(tester.getBottomLeft(expandedTitle).dy, 107.0);
_verifyTextNotClipped(expandedTitle, tester);
await tester.pumpWidget(buildAppBar(textScaleFactor: 3.0));
expect(tester.getBottomLeft(expandedTitle).dy, 107.0);
_verifyTextNotClipped(expandedTitle, tester);
}, skip: kIsWeb && !isCanvasKit); // https://github.com/flutter/flutter/issues/99933
testWidgets('SliverAppBar.large expanded title position is adjusted with textScaleFactor', (WidgetTester tester) async {
const String title = 'Large AppBar';
Widget buildAppBar({double textScaleFactor = 1.0}) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: MediaQuery(
data: MediaQueryData(textScaleFactor: textScaleFactor),
child: Material(
child: CustomScrollView(
slivers: <Widget>[
const SliverAppBar.large(
title: Text(title, maxLines: 1),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
),
);
}
await tester.pumpWidget(buildAppBar());
final Finder expandedTitle = find.text(title).first;
final RenderSliver renderSliverAppBar = tester.renderObject(find.byType(SliverAppBar));
expect(
tester.getBottomLeft(expandedTitle).dy,
renderSliverAppBar.geometry!.scrollExtent - 28.0,
reason: 'bottom padding of a large expanded title should be 28.',
);
_verifyTextNotClipped(expandedTitle, tester);
await tester.pumpWidget(buildAppBar(textScaleFactor: 2.0));
expect(
tester.getBottomLeft(expandedTitle).dy,
renderSliverAppBar.geometry!.scrollExtent - 28.0,
reason: 'bottom padding of a large expanded title should be 28.',
);
_verifyTextNotClipped(expandedTitle, tester);
// The bottom padding of the expanded title needs to be reduced for it to be
// fully visible.
await tester.pumpWidget(buildAppBar(textScaleFactor: 3.0));
expect(tester.getBottomLeft(expandedTitle).dy, 124.0);
_verifyTextNotClipped(expandedTitle, tester);
});
group('AppBar.forceMaterialTransparency', () {
Material getAppBarMaterial(WidgetTester tester) {
return tester.widget<Material>(find
.descendant(of: find.byType(AppBar), matching: find.byType(Material))
.first);
}
// Generates a MaterialApp with an AppBar with a TextButton beneath it
// (via extendBodyBehindAppBar = true).
Widget buildWidget({
required bool forceMaterialTransparency,
required VoidCallback onPressed
}) {
return MaterialApp(
home: Scaffold(
extendBodyBehindAppBar: true,
appBar: AppBar(
forceMaterialTransparency: forceMaterialTransparency,
elevation: 3,
backgroundColor: Colors.red,
title: const Text('AppBar'),
),
body: Align(
alignment: Alignment.topCenter,
child: TextButton(
onPressed: onPressed,
child: const Text('press me'),
),
),
),
);
}
testWidgets(
'forceMaterialTransparency == true allows gestures beneath the app bar', (WidgetTester tester) async {
bool buttonWasPressed = false;
final Widget widget = buildWidget(
forceMaterialTransparency:true,
onPressed:() { buttonWasPressed = true; },
);
await tester.pumpWidget(widget);
final Material material = getAppBarMaterial(tester);
expect(material.type, MaterialType.transparency);
final Finder buttonFinder = find.byType(TextButton);
await tester.tap(buttonFinder);
await tester.pump();
expect(buttonWasPressed, isTrue);
});
testWidgets(
'forceMaterialTransparency == false does not allow gestures beneath the app bar',
(WidgetTester tester) async {
// Set this, and tester.tap(warnIfMissed:false), to suppress
// errors/warning that the button is not hittable (which is expected).
WidgetController.hitTestWarningShouldBeFatal = false;
bool buttonWasPressed = false;
final Widget widget = buildWidget(
forceMaterialTransparency:false,
onPressed:() { buttonWasPressed = true; },
);
await tester.pumpWidget(widget);
final Material material = getAppBarMaterial(tester);
expect(material.type, MaterialType.canvas);
final Finder buttonFinder = find.byType(TextButton);
await tester.tap(buttonFinder, warnIfMissed:false);
await tester.pump();
expect(buttonWasPressed, isFalse);
});
});
group('Material 2', () {
// These tests are only relevant for Material 2. Once Material 2
// support is deprecated and the APIs are removed, these tests
// can be deleted.
testWidgets('Material2 - SliverAppBar.medium defaults', (WidgetTester tester) async {
final ThemeData theme = ThemeData(useMaterial3: false);
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 112;
await tester.pumpWidget(MaterialApp(
theme: theme,
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
const SliverAppBar.medium(
title: Text('AppBar Title'),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
final ScrollController controller = primaryScrollController(tester);
// There are two widgets for the title. The first title is a larger version
// that is shown at the bottom when the app bar is expanded. It scrolls under
// the main row until it is completely hidden and then the first title is
// faded in. The last is the title on the mainrow with the icons. It is
// transparent when the app bar is expanded, and opaque when it is collapsed.
final Finder expandedTitle = find.text('AppBar Title').first;
final Finder expandedTitleClip = find.ancestor(
of: expandedTitle,
matching: find.byType(ClipRect),
);
final Finder collapsedTitle = find.text('AppBar Title').last;
final Finder collapsedTitleOpacity = find.ancestor(
of: collapsedTitle,
matching: find.byType(AnimatedOpacity),
);
// Default, fully expanded app bar.
expect(controller.offset, 0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
// Test the expanded title is positioned correctly.
final Offset titleOffset = tester.getBottomLeft(expandedTitle);
expect(titleOffset, const Offset(16.0, 92.0));
// Test the expanded title default color.
expect(
tester.renderObject<RenderParagraph>(expandedTitle).text.style!.color,
theme.colorScheme.onPrimary,
);
// Scroll the expanded app bar partially out of view.
controller.jumpTo(45);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight - 45);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight - 45);
// Scroll so that it is completely collapsed.
controller.jumpTo(600);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), collapsedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 1);
expect(tester.getSize(expandedTitleClip).height, 0);
// Scroll back to fully expanded.
controller.jumpTo(0);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
});
testWidgets('Material2 - SliverAppBar.large defaults', (WidgetTester tester) async {
final ThemeData theme = ThemeData(useMaterial3: false);
const double collapsedAppBarHeight = 64;
const double expandedAppBarHeight = 152;
await tester.pumpWidget(MaterialApp(
theme: theme,
home: Scaffold(
body: CustomScrollView(
primary: true,
slivers: <Widget>[
const SliverAppBar.large(
title: Text('AppBar Title'),
),
SliverToBoxAdapter(
child: Container(
height: 1200,
color: Colors.orange[400],
),
),
],
),
),
));
final ScrollController controller = primaryScrollController(tester);
// There are two widgets for the title. The first title is a larger version
// that is shown at the bottom when the app bar is expanded. It scrolls under
// the main row until it is completely hidden and then the first title is
// faded in. The last is the title on the mainrow with the icons. It is
// transparent when the app bar is expanded, and opaque when it is collapsed.
final Finder expandedTitle = find.text('AppBar Title').first;
final Finder expandedTitleClip = find.ancestor(
of: expandedTitle,
matching: find.byType(ClipRect),
);
final Finder collapsedTitle = find.text('AppBar Title').last;
final Finder collapsedTitleOpacity = find.ancestor(
of: collapsedTitle,
matching: find.byType(AnimatedOpacity),
);
// Default, fully expanded app bar.
expect(controller.offset, 0);
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
// Test the expanded title is positioned correctly.
final Offset titleOffset = tester.getBottomLeft(expandedTitle);
expect(titleOffset, const Offset(16.0, 124.0));
// Test the expanded title default color.
expect(
tester.renderObject<RenderParagraph>(expandedTitle).text.style!.color,
theme.colorScheme.onPrimary,
);
// Scroll the expanded app bar partially out of view.
controller.jumpTo(45);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight - 45);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight - 45);
// Scroll so that it is completely collapsed.
controller.jumpTo(600);
await tester.pump();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), collapsedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 1);
expect(tester.getSize(expandedTitleClip).height, 0);
// Scroll back to fully expanded.
controller.jumpTo(0);
await tester.pumpAndSettle();
expect(find.byType(SliverAppBar), findsOneWidget);
expect(appBarHeight(tester), expandedAppBarHeight);
expect(tester.widget<AnimatedOpacity>(collapsedTitleOpacity).opacity, 0);
expect(tester.getSize(expandedTitleClip).height, expandedAppBarHeight - collapsedAppBarHeight);
});
});
}