packages/flutter/test/cupertino/scaffold_test.dart - mirrors/flutter - Git at Google

 // 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 'dart:typed_data';

 import 'package:flutter/cupertino.dart';
 import 'package:flutter_test/flutter_test.dart';

 import '../image_data.dart';
 import '../rendering/mock_canvas.dart';

 /// Integration tests testing both [CupertinoPageScaffold] and [CupertinoTabScaffold].
 void main() {
   testWidgets('Contents are behind translucent bar', (WidgetTester tester) async {
     await tester.pumpWidget(
       const CupertinoApp(
         home: CupertinoPageScaffold(
           // Default nav bar is translucent.
           navigationBar: CupertinoNavigationBar(
             middle: Text('Title'),
           ),
           child: Center(),
         ),
       ),
     );

     expect(tester.getTopLeft(find.byType(Center)), Offset.zero);
   });

   testWidgets('Opaque bar pushes contents down', (WidgetTester tester) async {
     late BuildContext childContext;
     await tester.pumpWidget(Directionality(
       textDirection: TextDirection.ltr,
       child: MediaQuery(
         data: const MediaQueryData(viewInsets: EdgeInsets.only(top: 20)),
         child: CupertinoPageScaffold(
           navigationBar: const CupertinoNavigationBar(
             middle: Text('Opaque'),
             backgroundColor: Color(0xFFF8F8F8),
           ),
           child: Builder(
             builder: (BuildContext context) {
               childContext = context;
               return Container();
             },
           ),
         ),
       ),
     ));

     expect(MediaQuery.of(childContext).padding.top, 0);
     // The top of the [Container] is 44 px from the top of the screen because
     // it's pushed down by the opaque navigation bar whose height is 44 px,
     // and the 20 px [MediaQuery] top padding is fully absorbed by the navigation bar.
     expect(tester.getRect(find.byType(Container)), const Rect.fromLTRB(0, 44, 800, 600));
   });

   testWidgets('dark mode and obstruction work', (WidgetTester tester) async {
     const Color dynamicColor = CupertinoDynamicColor.withBrightness(
       color: Color(0xFFF8F8F8),
       darkColor: Color(0xEE333333),
     );

     const CupertinoDynamicColor backgroundColor = CupertinoDynamicColor.withBrightness(
       color: Color(0xFFFFFFFF),
       darkColor: Color(0xFF000000),
     );

     late BuildContext childContext;
     Widget scaffoldWithBrightness(Brightness brightness) {
       return Directionality(
         textDirection: TextDirection.ltr,
         child: MediaQuery(
           data: MediaQueryData(
             platformBrightness: brightness,
             viewInsets: const EdgeInsets.only(top: 20),
           ),
           child: CupertinoPageScaffold(
             backgroundColor: backgroundColor,
             navigationBar: const CupertinoNavigationBar(
               middle: Text('Title'),
               backgroundColor: dynamicColor,
             ),
             child: Builder(
               builder: (BuildContext context) {
                 childContext = context;
                 return Container();
               },
             ),
           ),
         ),
       );
     }
     await tester.pumpWidget(scaffoldWithBrightness(Brightness.light));

     expect(MediaQuery.of(childContext).padding.top, 0);
     expect(find.byType(CupertinoPageScaffold), paints..rect(color: backgroundColor.color));

     await tester.pumpWidget(scaffoldWithBrightness(Brightness.dark));

     expect(MediaQuery.of(childContext).padding.top, greaterThan(0));
     expect(find.byType(CupertinoPageScaffold), paints..rect(color: backgroundColor.darkColor));
   });

   testWidgets('Contents padding from viewInsets', (WidgetTester tester) async {
     await tester.pumpWidget(Directionality(
       textDirection: TextDirection.ltr,
       child: MediaQuery(
         data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
         child: CupertinoPageScaffold(
           navigationBar: const CupertinoNavigationBar(
             middle: Text('Opaque'),
             backgroundColor: Color(0xFFF8F8F8),
           ),
           child: Container(),
         ),
       ),
     ));

     expect(tester.getSize(find.byType(Container)).height, 600.0 - 44.0 - 100.0);

     late BuildContext childContext;
     await tester.pumpWidget(Directionality(
       textDirection: TextDirection.ltr,
       child: MediaQuery(
         data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
         child: CupertinoPageScaffold(
           navigationBar: const CupertinoNavigationBar(
             middle: Text('Transparent'),
           ),
           child: Builder(
             builder: (BuildContext context) {
               childContext = context;
               return Container();
             },
           ),
         ),
       ),
     ));

     expect(tester.getSize(find.byType(Container)).height, 600.0 - 100.0);
     // The shouldn't see a media query view inset because it was consumed by
     // the scaffold.
     expect(MediaQuery.of(childContext).viewInsets.bottom, 0);

     await tester.pumpWidget(Directionality(
       textDirection: TextDirection.ltr,
       child: MediaQuery(
         data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
         child: CupertinoPageScaffold(
           navigationBar: const CupertinoNavigationBar(
             middle: Text('Title'),
           ),
           resizeToAvoidBottomInset: false,
           child: Container(),
         ),
       ),
     ));

     expect(tester.getSize(find.byType(Container)).height, 600.0);
   });

   testWidgets('Contents bottom padding are not consumed by viewInsets when resizeToAvoidBottomInset overridden', (WidgetTester tester) async {
     const Widget child = CupertinoPageScaffold(
       resizeToAvoidBottomInset: false,
       navigationBar: CupertinoNavigationBar(
         middle: Text('Opaque'),
         backgroundColor: Color(0xFFF8F8F8),
       ),
       child: Placeholder(),
     );

     await tester.pumpWidget(
       const Directionality(
         textDirection: TextDirection.ltr,
         child: MediaQuery(
           data:  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(
       const Directionality(
         textDirection: TextDirection.ltr,
         child: MediaQuery(
           data: MediaQueryData(
             viewPadding: EdgeInsets.only(bottom: 20),
             viewInsets: EdgeInsets.only(bottom: 300),
           ),
           child: child,
         ),
       ),
     );
     final Offset finalPoint = tester.getCenter(find.byType(Placeholder));
     expect(initialPoint, finalPoint);
   });

   testWidgets('Contents are between opaque bars', (WidgetTester tester) async {
     const Center page1Center = Center();

     await tester.pumpWidget(
       CupertinoApp(
         home: CupertinoTabScaffold(
           tabBar: CupertinoTabBar(
             backgroundColor: CupertinoColors.white,
             items: <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                 label: 'Tab 1',
               ),
               BottomNavigationBarItem(
                 icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                 label: 'Tab 2',
               ),
             ],
           ),
           tabBuilder: (BuildContext context, int index) {
             return index == 0
                 ? const CupertinoPageScaffold(
                   navigationBar: CupertinoNavigationBar(
                     backgroundColor: CupertinoColors.white,
                     middle: Text('Title'),
                   ),
                   child: page1Center,
                 )
                 : const Stack();
           },
         ),
       ),
     );

     expect(tester.getSize(find.byWidget(page1Center)).height, 600.0 - 44.0 - 50.0);
   });

   testWidgets('Contents have automatic sliver padding between translucent bars', (WidgetTester tester) async {
     const SizedBox content = SizedBox(height: 600.0, width: 600.0);

     await tester.pumpWidget(
       CupertinoApp(
         home: MediaQuery(
           data: const MediaQueryData(
             padding: EdgeInsets.symmetric(vertical: 20.0),
           ),
           child: CupertinoTabScaffold(
             tabBar: CupertinoTabBar(
               items: <BottomNavigationBarItem>[
                 BottomNavigationBarItem(
                   icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                   label: 'Tab 1',
                 ),
                 BottomNavigationBarItem(
                   icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                   label: 'Tab 2',
                 ),
               ],
             ),
             tabBuilder: (BuildContext context, int index) {
               return index == 0
                   ? CupertinoPageScaffold(
                     navigationBar: const CupertinoNavigationBar(
                       middle: Text('Title'),
                     ),
                     child: ListView(
                       children: const <Widget>[
                         content,
                       ],
                     ),
                   )
                   : const Stack();
             },
           ),
         ),
       ),
     );

     // List content automatically padded by nav bar and top media query padding.
     expect(tester.getTopLeft(find.byWidget(content)).dy, 20.0 + 44.0);

     // Overscroll to the bottom.
     await tester.drag(find.byWidget(content), const Offset(0.0, -400.0), warnIfMissed: false); // can't be hit (it's empty) but we're aiming for the list really so it doesn't matter
     // Let it bounce back.
     await tester.pump();
     await tester.pump(const Duration(seconds: 1));

     // List content automatically padded by tab bar and bottom media query padding.
     expect(tester.getBottomLeft(find.byWidget(content)).dy, 600 - 20.0 - 50.0);
   });

   testWidgets('iOS independent tab navigation', (WidgetTester tester) async {
     // A full on iOS information architecture app with 2 tabs, and 2 pages
     // in each with independent navigation states.
     await tester.pumpWidget(
       CupertinoApp(
         home: CupertinoTabScaffold(
           tabBar: CupertinoTabBar(
             items: <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                 label: 'Tab 1',
               ),
               BottomNavigationBarItem(
                 icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
                 label: 'Tab 2',
               ),
             ],
           ),
           tabBuilder: (BuildContext context, int index) {
             // For 1-indexed readability.
             ++index;
             return CupertinoTabView(
               builder: (BuildContext context) {
                 return CupertinoPageScaffold(
                   navigationBar: CupertinoNavigationBar(
                     middle: Text('Page 1 of tab $index'),
                   ),
                   child: Center(
                     child: CupertinoButton(
                       child: const Text('Next'),
                       onPressed: () {
                         Navigator.of(context).push(
                           CupertinoPageRoute<void>(
                             builder: (BuildContext context) {
                               return CupertinoPageScaffold(
                                 navigationBar: CupertinoNavigationBar(
                                   middle: Text('Page 2 of tab $index'),
                                 ),
                                 child: Center(
                                   child: CupertinoButton(
                                     child: const Text('Back'),
                                     onPressed: () {
                                       Navigator.of(context).pop();
                                     },
                                   ),
                                 ),
                               );
                             },
                           ),
                         );
                       },
                     ),
                   ),
                 );
               },
             );
           },
         ),
       ),
     );

     expect(find.text('Page 1 of tab 1'), findsOneWidget);
     expect(find.text('Page 1 of tab 2'), findsNothing); // Lazy building so not built yet.

     await tester.tap(find.text('Tab 2'));
     await tester.pump();

     expect(find.text('Page 1 of tab 1'), findsNothing); // It's offstage now.
     expect(find.text('Page 1 of tab 1', skipOffstage: false), findsOneWidget);
     expect(find.text('Page 1 of tab 2'), findsOneWidget);

     // Navigate in tab 2.
     await tester.tap(find.text('Next'));
     await tester.pump();
     await tester.pump(const Duration(milliseconds: 600));

     expect(find.text('Page 2 of tab 2'), isOnstage);
     expect(find.text('Page 1 of tab 1', skipOffstage: false), isOffstage);

     await tester.tap(find.text('Tab 1'));
     await tester.pump();

     // Independent navigation stacks.
     expect(find.text('Page 1 of tab 1'), isOnstage);
     expect(find.text('Page 2 of tab 2', skipOffstage: false), isOffstage);

     // Navigate in tab 1.
     await tester.tap(find.text('Next'));
     await tester.pump();
     await tester.pump(const Duration(milliseconds: 600));

     expect(find.text('Page 2 of tab 1'), isOnstage);
     expect(find.text('Page 2 of tab 2', skipOffstage: false), isOffstage);

     await tester.tap(find.text('Tab 2'));
     await tester.pump();

     expect(find.text('Page 2 of tab 2'), isOnstage);
     expect(find.text('Page 2 of tab 1', skipOffstage: false), isOffstage);

     // Pop in tab 2
     await tester.tap(find.text('Back'));
     await tester.pump();
     await tester.pump(const Duration(milliseconds: 600));

     expect(find.text('Page 1 of tab 2'), isOnstage);
     expect(find.text('Page 2 of tab 1', skipOffstage: false), isOffstage);
   });

   testWidgets('Decorated with white background by default', (WidgetTester tester) async {
     await tester.pumpWidget(
       const CupertinoApp(
         home: CupertinoPageScaffold(
           child: Center(),
         ),
       ),
     );

     final DecoratedBox decoratedBox = tester.widgetList(find.byType(DecoratedBox)).elementAt(1) as DecoratedBox;
     expect(decoratedBox.decoration.runtimeType, BoxDecoration);

     final BoxDecoration decoration = decoratedBox.decoration as BoxDecoration;
     expect(decoration.color, isSameColorAs(CupertinoColors.white));
   });

   testWidgets('Overrides background color', (WidgetTester tester) async {
     await tester.pumpWidget(
       const CupertinoApp(
         home: CupertinoPageScaffold(
           backgroundColor: Color(0xFF010203),
           child: Center(),
         ),
       ),
     );

     final DecoratedBox decoratedBox = tester.widgetList(find.byType(DecoratedBox)).elementAt(1) as DecoratedBox;
     expect(decoratedBox.decoration.runtimeType, BoxDecoration);

     final BoxDecoration decoration = decoratedBox.decoration as BoxDecoration;
     expect(decoration.color, const Color(0xFF010203));
   });

   testWidgets('Lists in CupertinoPageScaffold scroll to the top when status bar tapped', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         builder: (BuildContext context, Widget? child) {
           // Acts as a 20px status bar at the root of the app.
           return MediaQuery(
             data: MediaQuery.of(context).copyWith(padding: const EdgeInsets.only(top: 20)),
             child: child!,
           );
         },
         home: CupertinoPageScaffold(
           // Default nav bar is translucent.
           navigationBar: const CupertinoNavigationBar(
             middle: Text('Title'),
           ),
           child: ListView.builder(
             itemExtent: 50,
             itemBuilder: (BuildContext context, int index) => Text(index.toString()),
           ),
         ),
       ),
     );
     // Top media query padding 20 + translucent nav bar 44.
     expect(tester.getTopLeft(find.text('0')).dy, 64);
     expect(tester.getTopLeft(find.text('6')).dy, 364);

     await tester.fling(
       find.text('5'), // Find some random text on the screen.
       const Offset(0, -200),
       20,
     );

     await tester.pumpAndSettle();

     expect(tester.getTopLeft(find.text('6')).dy, moreOrLessEquals(166.833, epsilon: 0.1));
     expect(tester.getTopLeft(find.text('12')).dy, moreOrLessEquals(466.8333333333334, epsilon: 0.1));

     // The media query top padding is 20. Tapping at 20 should do nothing.
     await tester.tapAt(const Offset(400, 20));
     await tester.pumpAndSettle();
     expect(tester.getTopLeft(find.text('6')).dy, moreOrLessEquals(166.833, epsilon: 0.1));
     expect(tester.getTopLeft(find.text('12')).dy, moreOrLessEquals(466.8333333333334, epsilon: 0.1));

     // Tap 1 pixel higher.
     await tester.tapAt(const Offset(400, 19));
     await tester.pump();
     await tester.pump(const Duration(milliseconds: 500));
     expect(tester.getTopLeft(find.text('0')).dy, 64);
     expect(tester.getTopLeft(find.text('6')).dy, 364);
     expect(find.text('12'), findsNothing);
   });

   testWidgets('resizeToAvoidBottomInset is supported even when no navigationBar', (WidgetTester tester) async {
     Widget buildFrame(bool showNavigationBar, bool showKeyboard) {
       return CupertinoApp(
         home: MediaQuery(
           data: MediaQueryData(
             viewPadding: const EdgeInsets.only(bottom: 20),
             viewInsets: EdgeInsets.only(bottom: showKeyboard ? 300 : 20),
           ),
           child: CupertinoPageScaffold(
             navigationBar: showNavigationBar ? const CupertinoNavigationBar(
               middle: Text('Title'),
             ) : null,
             child: const Center(
               child: CupertinoTextField(),
             ),
           ),
         ),
       );
     }

     // When there is a nav bar and no keyboard.
     await tester.pumpWidget(buildFrame(true, false));
     final Offset positionNoInsetWithNavBar = tester.getTopLeft(find.byType(CupertinoTextField));

     // When there is a nav bar and keyboard, the CupertinoTextField moves up.
     await tester.pumpWidget(buildFrame(true, true));
     await tester.pumpAndSettle();
     final Offset positionWithInsetWithNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
     expect(positionWithInsetWithNavBar.dy, lessThan(positionNoInsetWithNavBar.dy));

     // When there is no nav bar and no keyboard, the CupertinoTextField is still
     // centered.
     await tester.pumpWidget(buildFrame(false, false));
     final Offset positionNoInsetNoNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
     expect(positionNoInsetNoNavBar, equals(positionNoInsetWithNavBar));

     // When there is a keyboard but no nav bar, the CupertinoTextField also
     // moves up to the same position as when there is a keyboard and nav bar.
     await tester.pumpWidget(buildFrame(false, true));
     await tester.pumpAndSettle();
     final Offset positionWithInsetNoNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
     expect(positionWithInsetNoNavBar.dy, lessThan(positionNoInsetNoNavBar.dy));
     expect(positionWithInsetNoNavBar, equals(positionWithInsetWithNavBar));
   });

   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: const CupertinoPageScaffold(
               navigationBar: CupertinoNavigationBar(
                 middle: Text('middle'),
                 leading: Text('leading'),
                 trailing: Text('trailing'),
               ),
               child: Text('content'),
             ),
           );
         }),
       ),
     );
     final Iterable<RichText> richTextList = tester.widgetList<RichText>(
       find.descendant(of: find.byType(CupertinoNavigationBar), matching: find.byType(RichText)),
     );

     expect(richTextList.length, greaterThan(0));
     expect(richTextList.any((RichText text) => text.textScaleFactor != 1), isFalse);

     expect(tester.widget<RichText>(find.descendant(of: find.text('content'), matching: find.byType(RichText))).textScaler, const TextScaler.linear(99.0));
   });
 }
	// 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 'dart:typed_data';

	import 'package:flutter/cupertino.dart';
	import 'package:flutter_test/flutter_test.dart';

	import '../image_data.dart';
	import '../rendering/mock_canvas.dart';

	/// Integration tests testing both [CupertinoPageScaffold] and [CupertinoTabScaffold].
	void main() {
	testWidgets('Contents are behind translucent bar', (WidgetTester tester) async {
	await tester.pumpWidget(
	const CupertinoApp(
	home: CupertinoPageScaffold(
	// Default nav bar is translucent.
	navigationBar: CupertinoNavigationBar(
	middle: Text('Title'),
	),
	child: Center(),
	),
	),
	);

	expect(tester.getTopLeft(find.byType(Center)), Offset.zero);
	});

	testWidgets('Opaque bar pushes contents down', (WidgetTester tester) async {
	late BuildContext childContext;
	await tester.pumpWidget(Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: const MediaQueryData(viewInsets: EdgeInsets.only(top: 20)),
	child: CupertinoPageScaffold(
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Opaque'),
	backgroundColor: Color(0xFFF8F8F8),
	),
	child: Builder(
	builder: (BuildContext context) {
	childContext = context;
	return Container();
	},
	),
	),
	),
	));

	expect(MediaQuery.of(childContext).padding.top, 0);
	// The top of the [Container] is 44 px from the top of the screen because
	// it's pushed down by the opaque navigation bar whose height is 44 px,
	// and the 20 px [MediaQuery] top padding is fully absorbed by the navigation bar.
	expect(tester.getRect(find.byType(Container)), const Rect.fromLTRB(0, 44, 800, 600));
	});

	testWidgets('dark mode and obstruction work', (WidgetTester tester) async {
	const Color dynamicColor = CupertinoDynamicColor.withBrightness(
	color: Color(0xFFF8F8F8),
	darkColor: Color(0xEE333333),
	);

	const CupertinoDynamicColor backgroundColor = CupertinoDynamicColor.withBrightness(
	color: Color(0xFFFFFFFF),
	darkColor: Color(0xFF000000),
	);

	late BuildContext childContext;
	Widget scaffoldWithBrightness(Brightness brightness) {
	return Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: MediaQueryData(
	platformBrightness: brightness,
	viewInsets: const EdgeInsets.only(top: 20),
	),
	child: CupertinoPageScaffold(
	backgroundColor: backgroundColor,
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Title'),
	backgroundColor: dynamicColor,
	),
	child: Builder(
	builder: (BuildContext context) {
	childContext = context;
	return Container();
	},
	),
	),
	),
	);
	}
	await tester.pumpWidget(scaffoldWithBrightness(Brightness.light));

	expect(MediaQuery.of(childContext).padding.top, 0);
	expect(find.byType(CupertinoPageScaffold), paints..rect(color: backgroundColor.color));

	await tester.pumpWidget(scaffoldWithBrightness(Brightness.dark));

	expect(MediaQuery.of(childContext).padding.top, greaterThan(0));
	expect(find.byType(CupertinoPageScaffold), paints..rect(color: backgroundColor.darkColor));
	});

	testWidgets('Contents padding from viewInsets', (WidgetTester tester) async {
	await tester.pumpWidget(Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
	child: CupertinoPageScaffold(
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Opaque'),
	backgroundColor: Color(0xFFF8F8F8),
	),
	child: Container(),
	),
	),
	));

	expect(tester.getSize(find.byType(Container)).height, 600.0 - 44.0 - 100.0);

	late BuildContext childContext;
	await tester.pumpWidget(Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
	child: CupertinoPageScaffold(
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Transparent'),
	),
	child: Builder(
	builder: (BuildContext context) {
	childContext = context;
	return Container();
	},
	),
	),
	),
	));

	expect(tester.getSize(find.byType(Container)).height, 600.0 - 100.0);
	// The shouldn't see a media query view inset because it was consumed by
	// the scaffold.
	expect(MediaQuery.of(childContext).viewInsets.bottom, 0);

	await tester.pumpWidget(Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: const MediaQueryData(viewInsets: EdgeInsets.only(bottom: 100.0)),
	child: CupertinoPageScaffold(
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Title'),
	),
	resizeToAvoidBottomInset: false,
	child: Container(),
	),
	),
	));

	expect(tester.getSize(find.byType(Container)).height, 600.0);
	});

	testWidgets('Contents bottom padding are not consumed by viewInsets when resizeToAvoidBottomInset overridden', (WidgetTester tester) async {
	const Widget child = CupertinoPageScaffold(
	resizeToAvoidBottomInset: false,
	navigationBar: CupertinoNavigationBar(
	middle: Text('Opaque'),
	backgroundColor: Color(0xFFF8F8F8),
	),
	child: Placeholder(),
	);

	await tester.pumpWidget(
	const Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: 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(
	const Directionality(
	textDirection: TextDirection.ltr,
	child: MediaQuery(
	data: MediaQueryData(
	viewPadding: EdgeInsets.only(bottom: 20),
	viewInsets: EdgeInsets.only(bottom: 300),
	),
	child: child,
	),
	),
	);
	final Offset finalPoint = tester.getCenter(find.byType(Placeholder));
	expect(initialPoint, finalPoint);
	});

	testWidgets('Contents are between opaque bars', (WidgetTester tester) async {
	const Center page1Center = Center();

	await tester.pumpWidget(
	CupertinoApp(
	home: CupertinoTabScaffold(
	tabBar: CupertinoTabBar(
	backgroundColor: CupertinoColors.white,
	items: <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 1',
	),
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 2',
	),
	],
	),
	tabBuilder: (BuildContext context, int index) {
	return index == 0
	? const CupertinoPageScaffold(
	navigationBar: CupertinoNavigationBar(
	backgroundColor: CupertinoColors.white,
	middle: Text('Title'),
	),
	child: page1Center,
	)
	: const Stack();
	},
	),
	),
	);

	expect(tester.getSize(find.byWidget(page1Center)).height, 600.0 - 44.0 - 50.0);
	});

	testWidgets('Contents have automatic sliver padding between translucent bars', (WidgetTester tester) async {
	const SizedBox content = SizedBox(height: 600.0, width: 600.0);

	await tester.pumpWidget(
	CupertinoApp(
	home: MediaQuery(
	data: const MediaQueryData(
	padding: EdgeInsets.symmetric(vertical: 20.0),
	),
	child: CupertinoTabScaffold(
	tabBar: CupertinoTabBar(
	items: <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 1',
	),
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 2',
	),
	],
	),
	tabBuilder: (BuildContext context, int index) {
	return index == 0
	? CupertinoPageScaffold(
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Title'),
	),
	child: ListView(
	children: const <Widget>[
	content,
	],
	),
	)
	: const Stack();
	},
	),
	),
	),
	);

	// List content automatically padded by nav bar and top media query padding.
	expect(tester.getTopLeft(find.byWidget(content)).dy, 20.0 + 44.0);

	// Overscroll to the bottom.
	await tester.drag(find.byWidget(content), const Offset(0.0, -400.0), warnIfMissed: false); // can't be hit (it's empty) but we're aiming for the list really so it doesn't matter
	// Let it bounce back.
	await tester.pump();
	await tester.pump(const Duration(seconds: 1));

	// List content automatically padded by tab bar and bottom media query padding.
	expect(tester.getBottomLeft(find.byWidget(content)).dy, 600 - 20.0 - 50.0);
	});

	testWidgets('iOS independent tab navigation', (WidgetTester tester) async {
	// A full on iOS information architecture app with 2 tabs, and 2 pages
	// in each with independent navigation states.
	await tester.pumpWidget(
	CupertinoApp(
	home: CupertinoTabScaffold(
	tabBar: CupertinoTabBar(
	items: <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 1',
	),
	BottomNavigationBarItem(
	icon: ImageIcon(MemoryImage(Uint8List.fromList(kTransparentImage))),
	label: 'Tab 2',
	),
	],
	),
	tabBuilder: (BuildContext context, int index) {
	// For 1-indexed readability.
	++index;
	return CupertinoTabView(
	builder: (BuildContext context) {
	return CupertinoPageScaffold(
	navigationBar: CupertinoNavigationBar(
	middle: Text('Page 1 of tab $index'),
	),
	child: Center(
	child: CupertinoButton(
	child: const Text('Next'),
	onPressed: () {
	Navigator.of(context).push(
	CupertinoPageRoute<void>(
	builder: (BuildContext context) {
	return CupertinoPageScaffold(
	navigationBar: CupertinoNavigationBar(
	middle: Text('Page 2 of tab $index'),
	),
	child: Center(
	child: CupertinoButton(
	child: const Text('Back'),
	onPressed: () {
	Navigator.of(context).pop();
	},
	),
	),
	);
	},
	),
	);
	},
	),
	),
	);
	},
	);
	},
	),
	),
	);

	expect(find.text('Page 1 of tab 1'), findsOneWidget);
	expect(find.text('Page 1 of tab 2'), findsNothing); // Lazy building so not built yet.

	await tester.tap(find.text('Tab 2'));
	await tester.pump();

	expect(find.text('Page 1 of tab 1'), findsNothing); // It's offstage now.
	expect(find.text('Page 1 of tab 1', skipOffstage: false), findsOneWidget);
	expect(find.text('Page 1 of tab 2'), findsOneWidget);

	// Navigate in tab 2.
	await tester.tap(find.text('Next'));
	await tester.pump();
	await tester.pump(const Duration(milliseconds: 600));

	expect(find.text('Page 2 of tab 2'), isOnstage);
	expect(find.text('Page 1 of tab 1', skipOffstage: false), isOffstage);

	await tester.tap(find.text('Tab 1'));
	await tester.pump();

	// Independent navigation stacks.
	expect(find.text('Page 1 of tab 1'), isOnstage);
	expect(find.text('Page 2 of tab 2', skipOffstage: false), isOffstage);

	// Navigate in tab 1.
	await tester.tap(find.text('Next'));
	await tester.pump();
	await tester.pump(const Duration(milliseconds: 600));

	expect(find.text('Page 2 of tab 1'), isOnstage);
	expect(find.text('Page 2 of tab 2', skipOffstage: false), isOffstage);

	await tester.tap(find.text('Tab 2'));
	await tester.pump();

	expect(find.text('Page 2 of tab 2'), isOnstage);
	expect(find.text('Page 2 of tab 1', skipOffstage: false), isOffstage);

	// Pop in tab 2
	await tester.tap(find.text('Back'));
	await tester.pump();
	await tester.pump(const Duration(milliseconds: 600));

	expect(find.text('Page 1 of tab 2'), isOnstage);
	expect(find.text('Page 2 of tab 1', skipOffstage: false), isOffstage);
	});

	testWidgets('Decorated with white background by default', (WidgetTester tester) async {
	await tester.pumpWidget(
	const CupertinoApp(
	home: CupertinoPageScaffold(
	child: Center(),
	),
	),
	);

	final DecoratedBox decoratedBox = tester.widgetList(find.byType(DecoratedBox)).elementAt(1) as DecoratedBox;
	expect(decoratedBox.decoration.runtimeType, BoxDecoration);

	final BoxDecoration decoration = decoratedBox.decoration as BoxDecoration;
	expect(decoration.color, isSameColorAs(CupertinoColors.white));
	});

	testWidgets('Overrides background color', (WidgetTester tester) async {
	await tester.pumpWidget(
	const CupertinoApp(
	home: CupertinoPageScaffold(
	backgroundColor: Color(0xFF010203),
	child: Center(),
	),
	),
	);

	final DecoratedBox decoratedBox = tester.widgetList(find.byType(DecoratedBox)).elementAt(1) as DecoratedBox;
	expect(decoratedBox.decoration.runtimeType, BoxDecoration);

	final BoxDecoration decoration = decoratedBox.decoration as BoxDecoration;
	expect(decoration.color, const Color(0xFF010203));
	});

	testWidgets('Lists in CupertinoPageScaffold scroll to the top when status bar tapped', (WidgetTester tester) async {
	await tester.pumpWidget(
	CupertinoApp(
	builder: (BuildContext context, Widget? child) {
	// Acts as a 20px status bar at the root of the app.
	return MediaQuery(
	data: MediaQuery.of(context).copyWith(padding: const EdgeInsets.only(top: 20)),
	child: child!,
	);
	},
	home: CupertinoPageScaffold(
	// Default nav bar is translucent.
	navigationBar: const CupertinoNavigationBar(
	middle: Text('Title'),
	),
	child: ListView.builder(
	itemExtent: 50,
	itemBuilder: (BuildContext context, int index) => Text(index.toString()),
	),
	),
	),
	);
	// Top media query padding 20 + translucent nav bar 44.
	expect(tester.getTopLeft(find.text('0')).dy, 64);
	expect(tester.getTopLeft(find.text('6')).dy, 364);

	await tester.fling(
	find.text('5'), // Find some random text on the screen.
	const Offset(0, -200),
	20,
	);

	await tester.pumpAndSettle();

	expect(tester.getTopLeft(find.text('6')).dy, moreOrLessEquals(166.833, epsilon: 0.1));
	expect(tester.getTopLeft(find.text('12')).dy, moreOrLessEquals(466.8333333333334, epsilon: 0.1));

	// The media query top padding is 20. Tapping at 20 should do nothing.
	await tester.tapAt(const Offset(400, 20));
	await tester.pumpAndSettle();
	expect(tester.getTopLeft(find.text('6')).dy, moreOrLessEquals(166.833, epsilon: 0.1));
	expect(tester.getTopLeft(find.text('12')).dy, moreOrLessEquals(466.8333333333334, epsilon: 0.1));

	// Tap 1 pixel higher.
	await tester.tapAt(const Offset(400, 19));
	await tester.pump();
	await tester.pump(const Duration(milliseconds: 500));
	expect(tester.getTopLeft(find.text('0')).dy, 64);
	expect(tester.getTopLeft(find.text('6')).dy, 364);
	expect(find.text('12'), findsNothing);
	});

	testWidgets('resizeToAvoidBottomInset is supported even when no navigationBar', (WidgetTester tester) async {
	Widget buildFrame(bool showNavigationBar, bool showKeyboard) {
	return CupertinoApp(
	home: MediaQuery(
	data: MediaQueryData(
	viewPadding: const EdgeInsets.only(bottom: 20),
	viewInsets: EdgeInsets.only(bottom: showKeyboard ? 300 : 20),
	),
	child: CupertinoPageScaffold(
	navigationBar: showNavigationBar ? const CupertinoNavigationBar(
	middle: Text('Title'),
	) : null,
	child: const Center(
	child: CupertinoTextField(),
	),
	),
	),
	);
	}

	// When there is a nav bar and no keyboard.
	await tester.pumpWidget(buildFrame(true, false));
	final Offset positionNoInsetWithNavBar = tester.getTopLeft(find.byType(CupertinoTextField));

	// When there is a nav bar and keyboard, the CupertinoTextField moves up.
	await tester.pumpWidget(buildFrame(true, true));
	await tester.pumpAndSettle();
	final Offset positionWithInsetWithNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
	expect(positionWithInsetWithNavBar.dy, lessThan(positionNoInsetWithNavBar.dy));

	// When there is no nav bar and no keyboard, the CupertinoTextField is still
	// centered.
	await tester.pumpWidget(buildFrame(false, false));
	final Offset positionNoInsetNoNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
	expect(positionNoInsetNoNavBar, equals(positionNoInsetWithNavBar));

	// When there is a keyboard but no nav bar, the CupertinoTextField also
	// moves up to the same position as when there is a keyboard and nav bar.
	await tester.pumpWidget(buildFrame(false, true));
	await tester.pumpAndSettle();
	final Offset positionWithInsetNoNavBar = tester.getTopLeft(find.byType(CupertinoTextField));
	expect(positionWithInsetNoNavBar.dy, lessThan(positionNoInsetNoNavBar.dy));
	expect(positionWithInsetNoNavBar, equals(positionWithInsetWithNavBar));
	});

	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: const CupertinoPageScaffold(
	navigationBar: CupertinoNavigationBar(
	middle: Text('middle'),
	leading: Text('leading'),
	trailing: Text('trailing'),
	),
	child: Text('content'),
	),
	);
	}),
	),
	);
	final Iterable<RichText> richTextList = tester.widgetList<RichText>(
	find.descendant(of: find.byType(CupertinoNavigationBar), matching: find.byType(RichText)),
	);

	expect(richTextList.length, greaterThan(0));
	expect(richTextList.any((RichText text) => text.textScaleFactor != 1), isFalse);

	expect(tester.widget<RichText>(find.descendant(of: find.text('content'), matching: find.byType(RichText))).textScaler, const TextScaler.linear(99.0));
	});
	}