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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 '../rendering/mock_canvas.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)))!;
}
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 ${describeEnum(platform)}');
expect(center.dx, lessThan(400 + size.width / 2.0), reason: 'on ${describeEnum(platform)}');
// 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 ${describeEnum(platform)}');
expect(center.dx, lessThan(400 + size.width / 2.0), reason: 'on ${describeEnum(platform)}');
// 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 ${describeEnum(platform)}');
}
});
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);
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);
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(
height: 0.0,
width: 0.0,
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('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 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('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('leading button extends to edge and is square', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: TargetPlatform.android),
home: Scaffold(
appBar: AppBar(
title: const Text('X'),
),
drawer: Column(), // Doesn't really matter. Triggers a hamburger regardless.
),
),
);
final Finder hamburger = find.byTooltip('Open navigation menu');
expect(tester.getTopLeft(hamburger), Offset.zero);
expect(tester.getSize(hamburger), const Size(56.0, 56.0));
});
testWidgets('test action is 4dp from edge and 48dp min', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: TargetPlatform.android),
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.byTooltip('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.byTooltip('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('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('AppBar uses the specified elevation or defaults to 4.0', (WidgetTester tester) async {
Widget buildAppBar([double? elevation]) {
return MaterialApp(
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 _AppBarState._defaultElevation = 4.0
await tester.pumpWidget(buildAppBar());
expect(getMaterial().elevation, 4.0);
// AppBar should use the specified elevation.
await tester.pumpWidget(buildAppBar(8.0));
expect(getMaterial().elevation, 8.0);
});
group('SliverAppBar elevation', () {
Widget buildSliverAppBar(bool forceElevated, {double? elevation, double? themeElevation}) {
return MaterialApp(
theme: ThemeData(appBarTheme: AppBarTheme(elevation: themeElevation)),
home: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
title: const Text('Title'),
forceElevated: forceElevated,
elevation: 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));
// When forceElevated is off, SliverAppBar should not be elevated.
await tester.pumpWidget(buildSliverAppBar(false));
expect(getMaterial().elevation, 0.0);
// Default elevation should be _AppBarState._defaultElevation = 4.0, and
// the AppBar's elevation should not be specified by SliverAppBar.
await tester.pumpWidget(buildSliverAppBar(true));
expect(getMaterial().elevation, 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);
});
});
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 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('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(
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('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('AppBar draws a light system bar for a dark background', (WidgetTester tester) async {
final ThemeData darkTheme = ThemeData.dark();
await tester.pumpWidget(MaterialApp(
theme: darkTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
));
expect(darkTheme.primaryColorBrightness, Brightness.dark);
expect(darkTheme.colorScheme.brightness, Brightness.dark);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.dark,
statusBarIconBrightness: Brightness.light,
));
});
testWidgets('AppBar draws a dark system bar for a light background', (WidgetTester tester) async {
final ThemeData lightTheme = ThemeData(primarySwatch: Colors.lightBlue);
await tester.pumpWidget(
MaterialApp(
theme: lightTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
),
);
expect(lightTheme.primaryColorBrightness, Brightness.light);
expect(lightTheme.colorScheme.brightness, Brightness.light);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.light,
statusBarIconBrightness: Brightness.dark,
));
});
testWidgets('AppBar draws a light system bar for a light theme with a dark background', (WidgetTester tester) async {
final ThemeData lightTheme = ThemeData(primarySwatch: Colors.deepOrange);
await tester.pumpWidget(MaterialApp(
theme: lightTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
));
expect(lightTheme.primaryColorBrightness, Brightness.dark);
expect(lightTheme.colorScheme.brightness, Brightness.light);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.dark,
statusBarIconBrightness: Brightness.light,
));
});
testWidgets('AppBar draws a dark system bar for a dark theme with a light background', (WidgetTester tester) async {
final ThemeData darkTheme = ThemeData(brightness: Brightness.dark, cardColor: Colors.white);
await tester.pumpWidget(
MaterialApp(
theme: darkTheme,
home: Scaffold(
appBar: AppBar(
title: const Text('test'),
),
),
),
);
expect(darkTheme.primaryColorBrightness, Brightness.dark);
expect(darkTheme.colorScheme.brightness, Brightness.dark);
expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
statusBarBrightness: Brightness.light,
statusBarIconBrightness: Brightness.dark,
));
});
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(
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(
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.add_circle, 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);
});
testWidgets('AppBarTheme.backwardsCompatibility', (WidgetTester tester) async {
const Color foregroundColor = Color(0xff00ff00);
final Key leadingIconKey = UniqueKey();
final Key actionIconKey = UniqueKey();
await tester.pumpWidget(
MaterialApp(
theme: ThemeData.light().copyWith(
appBarTheme: const AppBarTheme(
backwardsCompatibility: false,
),
),
home: Scaffold(
appBar: AppBar(
foregroundColor: foregroundColor, // only applies if backwardsCompatibility is false
leading: Icon(Icons.add_circle, key: leadingIconKey),
title: const Text('title'),
actions: <Widget>[Icon(Icons.add_circle, key: actionIconKey), const Text('action')],
),
),
),
);
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);
});
testWidgets('SliverAppBar.backgroundColor MaterialStateColor scrolledUnder', (WidgetTester tester) async {
const double collapsedHeight = kToolbarHeight;
const double expandedHeight = 200.0;
const Color scrolledColor = Color(0xff00ff00);
const Color defaultColor = Color(0xff0000ff);
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder) ? scrolledColor : defaultColor;
}),
expandedHeight: expandedHeight,
pinned: true,
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
Container(height: 1200.0, color: Colors.teal),
],
),
),
],
),
),
),
);
Finder findAppBarMaterial() {
return find.descendant(of: find.byType(AppBar), matching: find.byType(Material));
}
Color? getAppBarBackgroundColor() {
return tester.widget<Material>(findAppBarMaterial()).color;
}
expect(getAppBarBackgroundColor(), 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(), 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(), defaultColor);
expect(tester.getSize(findAppBarMaterial()).height, expandedHeight);
});
testWidgets('SliverAppBar.backgroundColor with FlexibleSpace MaterialStateColor scrolledUnder', (WidgetTester tester) async {
const double collapsedHeight = kToolbarHeight;
const double expandedHeight = 200.0;
const Color scrolledColor = Color(0xff00ff00);
const Color defaultColor = Color(0xff0000ff);
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
elevation: 0,
backgroundColor: MaterialStateColor.resolveWith((Set<MaterialState> states) {
return states.contains(MaterialState.scrolledUnder) ? scrolledColor : defaultColor;
}),
expandedHeight: expandedHeight,
pinned: true,
flexibleSpace: const FlexibleSpaceBar(
title: Text('SliverAppBar'),
),
),
SliverList(
delegate: SliverChildListDelegate(
<Widget>[
Container(height: 1200.0, color: Colors.teal),
],
),
),
],
),
),
),