blob: 2c86105d46d52e6d59daf094e8f93ef8311bec98 [file] [log] [blame]
// Copyright 2017 The Chromium 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/cupertino.dart';
import 'package:flutter_test/flutter_test.dart';
import '../painting/mocks_for_image_cache.dart';
import '../rendering/rendering_tester.dart';
List<int> selectedTabs;
class MockCupertinoTabController extends CupertinoTabController {
MockCupertinoTabController({ int initialIndex }): super(initialIndex: initialIndex);
bool isDisposed = false;
int numOfListeners = 0;
@override
void addListener(VoidCallback listener) {
numOfListeners++;
super.addListener(listener);
}
@override
void removeListener(VoidCallback listener) {
numOfListeners--;
super.removeListener(listener);
}
@override
void dispose() {
isDisposed = true;
super.dispose();
}
}
void main() {
setUp(() {
selectedTabs = <int>[];
});
BottomNavigationBarItem tabGenerator(int index) {
return BottomNavigationBarItem(
icon: const ImageIcon(TestImageProvider(24, 24)),
title: Text('Tab ${index + 1}'),
);
}
testWidgets('Tab switching', (WidgetTester tester) async {
final List<int> tabsPainted = <int>[];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int>[0]);
RichText tab1 = tester.widget(find.descendant(
of: find.text('Tab 1'),
matching: find.byType(RichText),
));
expect(tab1.text.style.color, CupertinoColors.activeBlue);
RichText tab2 = tester.widget(find.descendant(
of: find.text('Tab 2'),
matching: find.byType(RichText),
));
expect(tab2.text.style.color, CupertinoColors.inactiveGray);
await tester.tap(find.text('Tab 2'));
await tester.pump();
expect(tabsPainted, const <int>[0, 1]);
tab1 = tester.widget(find.descendant(
of: find.text('Tab 1'),
matching: find.byType(RichText),
));
expect(tab1.text.style.color, CupertinoColors.inactiveGray);
tab2 = tester.widget(find.descendant(
of: find.text('Tab 2'),
matching: find.byType(RichText),
));
expect(tab2.text.style.color, CupertinoColors.activeBlue);
await tester.tap(find.text('Tab 1'));
await tester.pump();
expect(tabsPainted, const <int>[0, 1, 0]);
// CupertinoTabBar's onTap callbacks are passed on.
expect(selectedTabs, const <int>[1, 0]);
});
testWidgets('Tabs are lazy built and moved offstage when inactive', (WidgetTester tester) async {
final List<int> tabsBuilt = <int>[];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
tabsBuilt.add(index);
return Text('Page ${index + 1}');
},
),
),
);
expect(tabsBuilt, const <int>[0]);
expect(find.text('Page 1'), findsOneWidget);
expect(find.text('Page 2'), findsNothing);
await tester.tap(find.text('Tab 2'));
await tester.pump();
// Both tabs are built but only one is onstage.
expect(tabsBuilt, const <int>[0, 0, 1]);
expect(find.text('Page 1', skipOffstage: false), isOffstage);
expect(find.text('Page 2'), findsOneWidget);
await tester.tap(find.text('Tab 1'));
await tester.pump();
expect(tabsBuilt, const <int>[0, 0, 1, 0, 1]);
expect(find.text('Page 1'), findsOneWidget);
expect(find.text('Page 2', skipOffstage: false), isOffstage);
});
testWidgets('Last tab gets focus', (WidgetTester tester) async {
// 2 nodes for 2 tabs
final List<FocusNode> focusNodes = <FocusNode>[
FocusNode(debugLabel: 'Node 1'),
FocusNode(debugLabel: 'Node 2'),
];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return CupertinoTextField(
focusNode: focusNodes[index],
autofocus: true,
);
},
),
),
);
expect(focusNodes[0].hasFocus, isTrue);
await tester.tap(find.text('Tab 2'));
await tester.pump();
expect(focusNodes[0].hasFocus, isFalse);
expect(focusNodes[1].hasFocus, isTrue);
await tester.tap(find.text('Tab 1'));
await tester.pump();
expect(focusNodes[0].hasFocus, isTrue);
expect(focusNodes[1].hasFocus, isFalse);
});
testWidgets('Do not affect focus order in the route', (WidgetTester tester) async {
final List<FocusNode> focusNodes = <FocusNode>[
FocusNode(debugLabel: 'Node 1'),
FocusNode(debugLabel: 'Node 2'),
FocusNode(debugLabel: 'Node 3'),
FocusNode(debugLabel: 'Node 4'),
];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return Column(
children: <Widget>[
CupertinoTextField(
focusNode: focusNodes[index * 2],
placeholder: 'TextField 1',
),
CupertinoTextField(
focusNode: focusNodes[index * 2 + 1],
placeholder: 'TextField 2',
),
],
);
},
),
),
);
expect(
focusNodes.any((FocusNode node) => node.hasFocus),
isFalse,
);
await tester.tap(find.widgetWithText(CupertinoTextField, 'TextField 2'));
expect(
focusNodes.indexOf(focusNodes.singleWhere((FocusNode node) => node.hasFocus)),
1,
);
await tester.tap(find.text('Tab 2'));
await tester.pump();
await tester.tap(find.widgetWithText(CupertinoTextField, 'TextField 1'));
expect(
focusNodes.indexOf(focusNodes.singleWhere((FocusNode node) => node.hasFocus)),
2,
);
await tester.tap(find.text('Tab 1'));
await tester.pump();
// Upon going back to tab 1, the item it tab 1 that previously had the focus
// (TextField 2) gets it back.
expect(
focusNodes.indexOf(focusNodes.singleWhere((FocusNode node) => node.hasFocus)),
1,
);
});
testWidgets('Programmatic tab switching by changing the index of an existing controller', (WidgetTester tester) async {
final CupertinoTabController controller = CupertinoTabController(initialIndex: 1);
final List<int> tabsPainted = <int>[];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int>[1]);
controller.index = 0;
await tester.pump();
expect(tabsPainted, const <int>[1, 0]);
// onTap is not called when changing tabs programmatically.
expect(selectedTabs, isEmpty);
// Can still tap out of the programmatically selected tab.
await tester.tap(find.text('Tab 2'));
await tester.pump();
expect(tabsPainted, const <int>[1, 0, 1]);
expect(selectedTabs, const <int>[1]);
});
testWidgets('Programmatic tab switching by passing in a new controller', (WidgetTester tester) async {
final List<int> tabsPainted = <int>[];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int>[0]);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
controller: CupertinoTabController(initialIndex: 1), // Programmatically change the tab now.
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int>[0, 1]);
// onTap is not called when changing tabs programmatically.
expect(selectedTabs, isEmpty);
// Can still tap out of the programmatically selected tab.
await tester.tap(find.text('Tab 1'));
await tester.pump();
expect(tabsPainted, const <int>[0, 1, 0]);
expect(selectedTabs, const <int>[0]);
});
testWidgets('Tab bar respects themes', (WidgetTester tester) async {
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return const Placeholder();
},
),
),
);
BoxDecoration tabDecoration = tester.widget<DecoratedBox>(find.descendant(
of: find.byType(CupertinoTabBar),
matching: find.byType(DecoratedBox),
)).decoration;
expect(tabDecoration.color, const Color(0xCCF8F8F8));
await tester.tap(find.text('Tab 2'));
await tester.pump();
// Pump again but with dark theme.
await tester.pumpWidget(
CupertinoApp(
theme: const CupertinoThemeData(
brightness: Brightness.dark,
primaryColor: CupertinoColors.destructiveRed,
),
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return const Placeholder();
},
),
),
);
tabDecoration = tester.widget<DecoratedBox>(find.descendant(
of: find.byType(CupertinoTabBar),
matching: find.byType(DecoratedBox),
)).decoration;
expect(tabDecoration.color, const Color(0xB7212121));
final RichText tab1 = tester.widget(find.descendant(
of: find.text('Tab 1'),
matching: find.byType(RichText),
));
// Tab 2 should still be selected after changing theme.
expect(tab1.text.style.color, CupertinoColors.inactiveGray);
final RichText tab2 = tester.widget(find.descendant(
of: find.text('Tab 2'),
matching: find.byType(RichText),
));
expect(tab2.text.style.color, CupertinoColors.destructiveRed);
});
testWidgets('Tab contents are padded when there are view insets', (WidgetTester tester) async {
BuildContext innerContext;
await tester.pumpWidget(
CupertinoApp(
home: MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 200),
),
child: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
innerContext = context;
return const Placeholder();
},
),
),
),
);
expect(tester.getRect(find.byType(Placeholder)), const Rect.fromLTWH(0, 0, 800, 400));
// Don't generate more media query padding from the translucent bottom
// tab since the tab is behind the keyboard now.
expect(MediaQuery.of(innerContext).padding.bottom, 0);
});
testWidgets('Tab contents are not inset when resizeToAvoidBottomInset overriden', (WidgetTester tester) async {
BuildContext innerContext;
await tester.pumpWidget(
CupertinoApp(
home: MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 200),
),
child: CupertinoTabScaffold(
resizeToAvoidBottomInset: false,
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
innerContext = context;
return const Placeholder();
},
),
),
),
);
expect(tester.getRect(find.byType(Placeholder)), const Rect.fromLTWH(0, 0, 800, 600));
// Media query padding shows up in the inner content because it wasn't masked
// by the view inset.
expect(MediaQuery.of(innerContext).padding.bottom, 50);
});
testWidgets('Tab contents bottom padding are not consumed by viewInsets when resizeToAvoidBottomInset overriden', (WidgetTester tester) async {
final Widget child = Directionality(
textDirection: TextDirection.ltr,
child: CupertinoTabScaffold(
resizeToAvoidBottomInset: false,
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return const Placeholder();
},
)
);
await tester.pumpWidget(
CupertinoApp(
home: MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 20.0),
),
child: child
),
),
);
final Offset initialPoint = tester.getCenter(find.byType(Placeholder));
// Consume bottom padding - as if by the keyboard opening
await tester.pumpWidget(
MediaQuery(
data: const MediaQueryData(
padding: EdgeInsets.zero,
viewPadding: EdgeInsets.only(bottom: 20),
viewInsets: EdgeInsets.only(bottom: 300),
),
child: child,
),
);
final Offset finalPoint = tester.getCenter(find.byType(Placeholder));
expect(initialPoint, finalPoint);
});
testWidgets('Tab and page scaffolds do not double stack view insets', (WidgetTester tester) async {
BuildContext innerContext;
await tester.pumpWidget(
CupertinoApp(
home: MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 200),
),
child: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return CupertinoPageScaffold(
child: Builder(
builder: (BuildContext context) {
innerContext = context;
return const Placeholder();
},
),
);
},
),
),
),
);
expect(tester.getRect(find.byType(Placeholder)), const Rect.fromLTWH(0, 0, 800, 400));
expect(MediaQuery.of(innerContext).padding.bottom, 0);
});
testWidgets('Deleting tabs after selecting them should switch to the last available tab', (WidgetTester tester) async {
final List<int> tabsBuilt = <int>[];
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(4, tabGenerator),
onTap: (int newTab) => selectedTabs.add(newTab),
),
tabBuilder: (BuildContext context, int index) {
tabsBuilt.add(index);
return Text('Page ${index + 1}');
},
),
),
);
expect(tabsBuilt, const <int>[0]);
// selectedTabs list is appended to on onTap callbacks. We didn't tap
// any tabs yet.
expect(selectedTabs, const <int>[]);
tabsBuilt.clear();
await tester.tap(find.text('Tab 4'));
await tester.pump();
// Tabs 1 and 4 are built but only one is onstage.
expect(tabsBuilt, const <int>[0, 3]);
expect(selectedTabs, const <int>[3]);
expect(find.text('Page 1', skipOffstage: false), isOffstage);
expect(find.text('Page 4'), findsOneWidget);
tabsBuilt.clear();
// Delete 2 tabs while Page 4 is still selected.
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(2, tabGenerator),
onTap: (int newTab) => selectedTabs.add(newTab),
),
tabBuilder: (BuildContext context, int index) {
tabsBuilt.add(index);
// Change the builder too.
return Text('Different page ${index + 1}');
},
),
)
);
expect(tabsBuilt, const <int>[0, 1]);
// We didn't tap on any additional tabs to invoke the onTap callback. We
// just deleted a tab.
expect(selectedTabs, const <int>[3]);
// Tab 1 was previously built so it's rebuilt again, albeit offstage.
expect(find.text('Different page 1', skipOffstage: false), isOffstage);
// Since all the tabs after tab 2 are deleted, tab 2 is now the last tab and
// the actively shown tab.
expect(find.text('Different page 2'), findsOneWidget);
// No more tab 4 since it's deleted.
expect(find.text('Different page 4', skipOffstage: false), findsNothing);
// We also changed the builder so no tabs should be built with the old
// builder.
expect(find.text('Page 1', skipOffstage: false), findsNothing);
expect(find.text('Page 2', skipOffstage: false), findsNothing);
expect(find.text('Page 4', skipOffstage: false), findsNothing);
});
// Regression test for https://github.com/flutter/flutter/issues/33455
testWidgets('Adding new tabs does not crash the app', (WidgetTester tester) async {
final List<int> tabsPainted = <int>[];
final CupertinoTabController controller = CupertinoTabController(initialIndex: 0);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(10, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int> [0]);
// Increase the num of tabs to 20.
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(20, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
),
);
expect(tabsPainted, const <int> [0, 0]);
await tester.tap(find.text('Tab 19'));
await tester.pump();
// Tapping the tabs should still work.
expect(tabsPainted, const <int>[0, 0, 18]);
});
testWidgets('If a controller is initially provided then the parent stops doing so for rebuilds, '
'a new instance of CupertinoTabController should be created and used by the widget, '
"while preserving the previous controller's tab index",
(WidgetTester tester) async {
final List<int> tabsPainted = <int>[];
final CupertinoTabController oldController = CupertinoTabController(initialIndex: 0);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(10, tabGenerator),
),
controller: oldController,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
)
);
expect(tabsPainted, const <int> [0]);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(10, tabGenerator),
),
controller: null,
tabBuilder:
(BuildContext context, int index) {
return CustomPaint(
child: Text('Page ${index + 1}'),
painter: TestCallbackPainter(
onPaint: () { tabsPainted.add(index); }
),
);
},
),
)
);
expect(tabsPainted, const <int> [0, 0]);
await tester.tap(find.text('Tab 2'));
await tester.pump();
// Tapping the tabs should still work.
expect(tabsPainted, const <int>[0, 0, 1]);
oldController.index = 10;
await tester.pump();
// Changing [index] of the oldController should not work.
expect(tabsPainted, const <int> [0, 0, 1]);
});
testWidgets('Do not call dispose on a controller that we do not own'
'but do remove from its listeners when done listening to it',
(WidgetTester tester) async {
final MockCupertinoTabController mockController = MockCupertinoTabController(initialIndex: 0);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(2, tabGenerator),
),
controller: mockController,
tabBuilder: (BuildContext context, int index) => const Placeholder(),
),
),
);
expect(mockController.numOfListeners, 1);
expect(mockController.isDisposed, isFalse);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(2, tabGenerator),
),
controller: null,
tabBuilder: (BuildContext context, int index) => const Placeholder(),
),
),
);
expect(mockController.numOfListeners, 0);
expect(mockController.isDisposed, isFalse);
});
testWidgets('The owner can dispose the old controller', (WidgetTester tester) async {
CupertinoTabController controller = CupertinoTabController(initialIndex: 2);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) => const Placeholder()
),
),
);
expect(find.text('Tab 1'), findsOneWidget);
expect(find.text('Tab 2'), findsOneWidget);
expect(find.text('Tab 3'), findsOneWidget);
controller.dispose();
controller = CupertinoTabController(initialIndex: 0);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(2, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) => const Placeholder()
),
),
);
// Should not crash here.
expect(find.text('Tab 1'), findsOneWidget);
expect(find.text('Tab 2'), findsOneWidget);
expect(find.text('Tab 3'), findsNothing);
});
testWidgets('A controller can control more than one CupertinoTabScaffold,'
'removal of listeners does not break the controller',
(WidgetTester tester) async {
final List<int> tabsPainted0 = <int>[];
final List<int> tabsPainted1 = <int>[];
MockCupertinoTabController controller = MockCupertinoTabController(initialIndex: 2);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoPageScaffold(
child: Stack(
children: <Widget>[
CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
painter: TestCallbackPainter(
onPaint: () => tabsPainted0.add(index)
),
);
},
),
CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
painter: TestCallbackPainter(
onPaint: () => tabsPainted1.add(index)
),
);
},
),
],
),
),
),
);
expect(tabsPainted0, const <int>[2]);
expect(tabsPainted1, const <int>[2]);
expect(controller.numOfListeners, 2);
controller.index = 0;
await tester.pump();
expect(tabsPainted0, const <int>[2, 0]);
expect(tabsPainted1, const <int>[2, 0]);
controller.index = 1;
// Removing one of the tabs works.
await tester.pumpWidget(
CupertinoApp(
home: CupertinoPageScaffold(
child: Stack(
children: <Widget>[
CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
painter: TestCallbackPainter(
onPaint: () => tabsPainted0.add(index)
),
);
},
),
],
),
),
),
);
expect(tabsPainted0, const <int>[2, 0, 1]);
expect(tabsPainted1, const <int>[2, 0]);
expect(controller.numOfListeners, 1);
// Replacing controller works.
controller = MockCupertinoTabController(initialIndex: 2);
await tester.pumpWidget(
CupertinoApp(
home: CupertinoPageScaffold(
child: Stack(
children: <Widget>[
CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) {
return CustomPaint(
painter: TestCallbackPainter(
onPaint: () => tabsPainted0.add(index)
)
);
}
),
]
)
)
)
);
expect(tabsPainted0, const <int>[2, 0, 1, 2]);
expect(tabsPainted1, const <int>[2, 0]);
expect(controller.numOfListeners, 1);
});
testWidgets('Assert when current tab index >= number of tabs', (WidgetTester tester) async {
final CupertinoTabController controller = CupertinoTabController(initialIndex: 2);
try {
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(2, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) => Text('Different page ${index + 1}'),
),
)
);
} on AssertionError catch (e) {
expect(e.toString(), contains('controller.index < tabBar.items.length'));
}
await tester.pumpWidget(
CupertinoApp(
home: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(3, tabGenerator),
),
controller: controller,
tabBuilder: (BuildContext context, int index) => Text('Different page ${index + 1}'),
),
)
);
expect(tester.takeException(), null);
controller.index = 10;
await tester.pump();
final String message = tester.takeException().toString();
expect(message, contains('current index ${controller.index}'));
expect(message, contains('with 3 tabs'));
});
testWidgets('Current tab index cannot go below zero or be null', (WidgetTester tester) async {
void expectAssertionError(VoidCallback callback, String errorMessage) {
try {
callback();
} on AssertionError catch (e) {
expect(e.toString(), contains(errorMessage));
}
}
expectAssertionError(() => CupertinoTabController(initialIndex: -1), '>= 0');
expectAssertionError(() => CupertinoTabController(initialIndex: null), '!= null');
final CupertinoTabController controller = CupertinoTabController();
expectAssertionError(() => controller.index = -1, '>= 0');
expectAssertionError(() => controller.index = null, '!= null');
});
testWidgets('Does not lose state when focusing on text input', (WidgetTester tester) async {
// Regression testing for https://github.com/flutter/flutter/issues/28457.
await tester.pumpWidget(
MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 0),
),
child: CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return const CupertinoTextField();
},
),
),
),
);
final EditableTextState editableState = tester.state<EditableTextState>(find.byType(EditableText));
await tester.enterText(find.byType(CupertinoTextField), "don't lose me");
await tester.pumpWidget(
MediaQuery(
data: const MediaQueryData(
viewInsets: EdgeInsets.only(bottom: 100),
),
child: CupertinoApp(
home: CupertinoTabScaffold(
tabBar: _buildTabBar(),
tabBuilder: (BuildContext context, int index) {
return const CupertinoTextField();
},
),
),
),
);
// The exact same state instance is still there.
expect(tester.state<EditableTextState>(find.byType(EditableText)), editableState);
expect(find.text("don't lose me"), findsOneWidget);
});
testWidgets('textScaleFactor is set to 1.0', (WidgetTester tester) async {
await tester.pumpWidget(
CupertinoApp(
home: Builder(builder: (BuildContext context) {
return MediaQuery(
data: MediaQuery.of(context).copyWith(textScaleFactor: 99),
child: CupertinoTabScaffold(
tabBar: CupertinoTabBar(
items: List<BottomNavigationBarItem>.generate(
10,
(int i) => BottomNavigationBarItem(icon: const ImageIcon(TestImageProvider(24, 23)), title: Text('$i'))
),
),
tabBuilder: (BuildContext context, int index) => const Text('content'),
),
);
}),
),
);
final Iterable<RichText> barItems = tester.widgetList<RichText>(
find.descendant(
of: find.byType(CupertinoTabBar),
matching: find.byType(RichText),
),
);
final Iterable<RichText> contents = tester.widgetList<RichText>(
find.descendant(
of: find.text('content'),
matching: find.byType(RichText),
skipOffstage: false,
),
);
expect(barItems.length, greaterThan(0));
expect(barItems.any((RichText t) => t.textScaleFactor != 1), isFalse);
expect(contents.length, greaterThan(0));
expect(contents.any((RichText t) => t.textScaleFactor != 99), isFalse);
});
}
CupertinoTabBar _buildTabBar({ int selectedTab = 0 }) {
return CupertinoTabBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: ImageIcon(TestImageProvider(24, 24)),
title: Text('Tab 1'),
),
BottomNavigationBarItem(
icon: ImageIcon(TestImageProvider(24, 24)),
title: Text('Tab 2'),
),
],
currentIndex: selectedTab,
onTap: (int newTab) => selectedTabs.add(newTab),
);
}