| // 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, <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, <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, <int>[0, 1, 0]); |
| // CupertinoTabBar's onTap callbacks are passed on. |
| expect(selectedTabs, <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, <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, <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, <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, <int>[1]); |
| |
| controller.index = 0; |
| await tester.pump(); |
| |
| expect(tabsPainted, <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, <int>[1, 0, 1]); |
| expect(selectedTabs, <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, <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, <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, <int>[0, 1, 0]); |
| expect(selectedTabs, <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 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, <int>[0]); |
| // selectedTabs list is appended to on onTap callbacks. We didn't tap |
| // any tabs yet. |
| expect(selectedTabs, <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, <int>[0, 3]); |
| expect(selectedTabs, <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, <int>[0, 1]); |
| // We didn't tap on any additional tabs to invoke the onTap callback. We |
| // just deleted a tab. |
| expect(selectedTabs, <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); |
| }); |
| |
| 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, <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, <int> [0, 0]); |
| |
| await tester.tap(find.text('Tab 2')); |
| await tester.pump(); |
| |
| // Tapping the tabs should still work. |
| expect(tabsPainted, <int>[0, 0, 1]); |
| |
| oldController.index = 10; |
| await tester.pump(); |
| |
| // Changing [index] of the oldController should not work. |
| expect(tabsPainted, <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); |
| }); |
| } |
| |
| 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), |
| ); |
| } |
