Cupertino examples improvements and clean up (#103044)

examples/api/lib/cupertino/bottom_tab_bar/bottom_tab_bar.0.dart → examples/api/lib/cupertino/bottom_tab_bar/cupertino_tab_bar.0.dart

@@ -6,42 +6,43 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const CupertinoTabBarApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class CupertinoTabBarApp extends StatelessWidget {
+  const CupertinoTabBarApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: MyStatefulWidget(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: CupertinoTabBarExample(),
     );
   }
 }
 
-class MyStatefulWidget extends StatefulWidget {
-  const MyStatefulWidget({Key? key}) : super(key: key);
-
-  @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
-}
+class CupertinoTabBarExample extends StatelessWidget {
+  const CupertinoTabBarExample({Key? key}) : super(key: key);
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
   @override
   Widget build(BuildContext context) {
     return CupertinoTabScaffold(
       tabBar: CupertinoTabBar(
         items: const <BottomNavigationBarItem>[
           BottomNavigationBarItem(
-            icon: Icon(CupertinoIcons.circle),
-            label: 'Tab 1',
+            icon: Icon(CupertinoIcons.star_fill),
+            label: 'Favourites',
+          ),
+          BottomNavigationBarItem(
+            icon: Icon(CupertinoIcons.clock_solid),
+            label: 'Recents',
+          ),
+          BottomNavigationBarItem(
+            icon: Icon(CupertinoIcons.person_alt_circle_fill),
+            label: 'Contacts',
           ),
           BottomNavigationBarItem(
-            icon: Icon(CupertinoIcons.add),
-            label: 'Tab 2',
+            icon: Icon(CupertinoIcons.circle_grid_3x3_fill),
+            label: 'Keypad',
           ),
         ],
       ),

examples/api/lib/cupertino/button/cupertino_button.0.dart

@@ -6,28 +6,27 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const CupertinoButtonApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class CupertinoButtonApp extends StatelessWidget {
+  const CupertinoButtonApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: MyStatelessWidget(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: CupertinoButtonExample(),
     );
   }
 }
 
-class MyStatelessWidget extends StatelessWidget {
-  const MyStatelessWidget({Key? key}) : super(key: key);
+class CupertinoButtonExample extends StatelessWidget {
+  const CupertinoButtonExample({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
-    return Center(
+    return CupertinoPageScaffold(
+      child: Center(
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: <Widget>[
@@ -52,6 +51,7 @@ class MyStatelessWidget extends StatelessWidget {
             ),
           ],
         ),
+      ),
     );
   }
 }

examples/api/lib/cupertino/date_picker/cupertino_date_picker.0.dart

@@ -6,30 +6,28 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const DatePickerApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class DatePickerApp extends StatelessWidget {
+  const DatePickerApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: MyStatelessWidget(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: DatePickerExample(),
     );
   }
 }
 
-class MyStatelessWidget extends StatefulWidget {
-  const MyStatelessWidget({Key? key}) : super(key: key);
+class DatePickerExample extends StatefulWidget {
+  const DatePickerExample({Key? key}) : super(key: key);
 
   @override
-  State<MyStatelessWidget> createState() => _MyStatelessWidgetState();
+  State<DatePickerExample> createState() => _DatePickerExampleState();
 }
 
-class _MyStatelessWidgetState extends State<MyStatelessWidget> {
+class _DatePickerExampleState extends State<DatePickerExample> {
   DateTime date = DateTime(2016, 10, 26);
   DateTime time = DateTime(2016, 5, 10, 22, 35);
   DateTime dateTime = DateTime(2016, 8, 3, 17, 45);

examples/api/lib/cupertino/date_picker/cupertino_timer_picker.0.dart

@@ -6,30 +6,28 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const TimerPickerApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoTimerPicker Sample';
+class TimerPickerApp extends StatelessWidget {
+  const TimerPickerApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: CupertinoTimerPickerSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: TimerPickerExample(),
     );
   }
 }
 
-class CupertinoTimerPickerSample extends StatefulWidget {
-  const CupertinoTimerPickerSample({Key? key}) : super(key: key);
+class TimerPickerExample extends StatefulWidget {
+  const TimerPickerExample({Key? key}) : super(key: key);
 
   @override
-  State<CupertinoTimerPickerSample> createState() => _CupertinoTimerPickerSampleState();
+  State<TimerPickerExample> createState() => _TimerPickerExampleState();
 }
 
-class _CupertinoTimerPickerSampleState extends State<CupertinoTimerPickerSample> {
+class _TimerPickerExampleState extends State<TimerPickerExample> {
   Duration duration = const Duration(hours: 1, minutes: 23);
 
   // This shows a CupertinoModalPopup with a reasonable fixed height which hosts CupertinoTimerPicker.

examples/api/lib/cupertino/dialog/cupertino_action_sheet.0.dart

@@ -6,26 +6,22 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const ActionSheetApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoActionSheet Sample';
+class ActionSheetApp extends StatelessWidget {
+  const ActionSheetApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: ActionSheetSample(title: _title),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: ActionSheetExample(),
     );
   }
 }
 
-class ActionSheetSample extends StatelessWidget {
-  const ActionSheetSample({Key? key, required this.title}) : super(key: key);
-
-  final String title;
+class ActionSheetExample extends StatelessWidget {
+  const ActionSheetExample({Key? key}) : super(key: key);
 
   // This shows a CupertinoModalPopup which hosts a CupertinoActionSheet.
   void _showActionSheet(BuildContext context) {
@@ -68,8 +64,8 @@ class ActionSheetSample extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
-      navigationBar: CupertinoNavigationBar(
-        middle: Text(title),
+      navigationBar: const CupertinoNavigationBar(
+        middle: Text('CupertinoActionSheet Sample'),
       ),
       child: Center(
         child: CupertinoButton(

examples/api/lib/cupertino/dialog/cupertino_alert_dialog.0.dart

@@ -6,26 +6,22 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const AlertDialogApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoAlertDialog Sample';
+class AlertDialogApp extends StatelessWidget {
+  const AlertDialogApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: ActionSheetSample(title: _title),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: AlertDialogExample(),
     );
   }
 }
 
-class ActionSheetSample extends StatelessWidget {
-  const ActionSheetSample({Key? key, required this.title}) : super(key: key);
-
-  final String title;
+class AlertDialogExample extends StatelessWidget {
+  const AlertDialogExample({Key? key}) : super(key: key);
 
   // This shows a CupertinoModalPopup which hosts a CupertinoAlertDialog.
   void _showAlertDialog(BuildContext context) {
@@ -62,8 +58,8 @@ class ActionSheetSample extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
-      navigationBar: CupertinoNavigationBar(
-        middle: Text(title),
+      navigationBar: const CupertinoNavigationBar(
+        middle: Text('CupertinoAlertDialog Sample'),
       ),
       child: Center(
         child: CupertinoButton(

examples/api/lib/cupertino/nav_bar/cupertino_navigation_bar.0.dart

@@ -6,37 +6,35 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const NavBarApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class NavBarApp extends StatelessWidget {
+  const NavBarApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: MyStatefulWidget(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: NavBarExample(),
     );
   }
 }
 
-class MyStatefulWidget extends StatefulWidget {
-  const MyStatefulWidget({Key? key}) : super(key: key);
+class NavBarExample extends StatefulWidget {
+  const NavBarExample({Key? key}) : super(key: key);
 
   @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
+  State<NavBarExample> createState() => _NavBarExampleState();
 }
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+class _NavBarExampleState extends State<NavBarExample> {
   @override
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
       navigationBar: CupertinoNavigationBar(
         // Try removing opacity to observe the lack of a blur effect and of sliding content.
         backgroundColor: CupertinoColors.systemGrey.withOpacity(0.5),
-        middle: const Text('Sample Code'),
+        middle: const Text('CupertinoNavigationBar Sample'),
       ),
       child: Column(
         children: <Widget>[

examples/api/lib/cupertino/nav_bar/cupertino_sliver_nav_bar.0.dart

@@ -6,24 +6,22 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const SliverNavBarApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoSliverNavigationBar Sample';
+class SliverNavBarApp extends StatelessWidget {
+  const SliverNavBarApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: CupertinoNavBarSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: SliverNavBarExample(),
     );
   }
 }
 
-class CupertinoNavBarSample extends StatelessWidget {
-  const CupertinoNavBarSample({Key? key}) : super(key: key);
+class SliverNavBarExample extends StatelessWidget {
+  const SliverNavBarExample({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

examples/api/lib/cupertino/picker/cupertino_picker.0.dart

@@ -16,30 +16,27 @@ const List<String> _fruitNames = <String>[
   'Strawberry',
 ];
 
-void main() => runApp(const MyApp());
+void main() => runApp(const CupertinoPickerApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class CupertinoPickerApp extends StatelessWidget {
+  const CupertinoPickerApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: CupertinoPickerSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: CupertinoPickerExample(),
     );
   }
 }
-
-class CupertinoPickerSample extends StatefulWidget {
-  const CupertinoPickerSample({Key? key}) : super(key: key);
+class CupertinoPickerExample extends StatefulWidget {
+  const CupertinoPickerExample({Key? key}) : super(key: key);
 
   @override
-  State<CupertinoPickerSample> createState() => _CupertinoPickerSampleState();
+  State<CupertinoPickerExample> createState() => _CupertinoPickerExampleState();
 }
 
-class _CupertinoPickerSampleState extends State<CupertinoPickerSample> {
+class _CupertinoPickerExampleState extends State<CupertinoPickerExample> {
   int _selectedFruit = 0;
 
   // This shows a CupertinoModalPopup with a reasonable fixed height which hosts CupertinoPicker.

examples/api/lib/cupertino/segmented_control/cupertino_segmented_control.0.dart

@@ -14,30 +14,28 @@ Map<Sky, Color> skyColors = <Sky, Color> {
   Sky.cerulean: const Color(0xff007ba7),
 };
 
-void main() => runApp(const MyApp());
+void main() => runApp(const SegmentControlApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoSegmentedControl Sample';
+class SegmentControlApp extends StatelessWidget {
+  const SegmentControlApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: SegmentedControlSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: SegmentedControlExample(),
     );
   }
 }
 
-class SegmentedControlSample extends StatefulWidget {
-  const SegmentedControlSample({Key? key}) : super(key: key);
+class SegmentedControlExample extends StatefulWidget {
+  const SegmentedControlExample({Key? key}) : super(key: key);
 
   @override
-  State<SegmentedControlSample> createState() => _SegmentedControlSampleState();
+  State<SegmentedControlExample> createState() => _SegmentedControlExampleState();
 }
 
-class _SegmentedControlSampleState extends State<SegmentedControlSample> {
+class _SegmentedControlExampleState extends State<SegmentedControlExample> {
   Sky _selectedSegment = Sky.midnight;
 
   @override
@@ -61,24 +59,15 @@ class _SegmentedControlSampleState extends State<SegmentedControlSample> {
           children: const <Sky, Widget>{
             Sky.midnight: Padding(
               padding: EdgeInsets.symmetric(horizontal: 20),
-              child: Text(
-                'Midnight',
-                style: TextStyle(color: CupertinoColors.white),
-              ),
+              child: Text('Midnight'),
             ),
             Sky.viridian: Padding(
               padding: EdgeInsets.symmetric(horizontal: 20),
-              child: Text(
-                'Viridian',
-                style: TextStyle(color: CupertinoColors.white),
-              ),
+              child: Text('Viridian'),
             ),
             Sky.cerulean: Padding(
               padding: EdgeInsets.symmetric(horizontal: 20),
-              child: Text(
-                'Cerulean',
-                style: TextStyle(color: CupertinoColors.white),
-              ),
+              child: Text('Cerulean'),
             ),
           },
         ),

examples/api/lib/cupertino/segmented_control/cupertino_sliding_segmented_control.0.dart

@@ -14,30 +14,28 @@ Map<Sky, Color> skyColors = <Sky, Color> {
   Sky.cerulean: const Color(0xff007ba7),
 };
 
-void main() => runApp(const MyApp());
+void main() => runApp(const SegmentControlApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'CupertinoSlidingSegmentedControl Sample';
+class SegmentControlApp extends StatelessWidget {
+  const SegmentControlApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: SegmentedControlSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: SegmentedControlExample(),
     );
   }
 }
 
-class SegmentedControlSample extends StatefulWidget {
-  const SegmentedControlSample({Key? key}) : super(key: key);
+class SegmentedControlExample extends StatefulWidget {
+  const SegmentedControlExample({Key? key}) : super(key: key);
 
   @override
-  State<SegmentedControlSample> createState() => _SegmentedControlSampleState();
+  State<SegmentedControlExample> createState() => _SegmentedControlExampleState();
 }
 
-class _SegmentedControlSampleState extends State<SegmentedControlSample> {
+class _SegmentedControlExampleState extends State<SegmentedControlExample> {
   Sky _selectedSegment = Sky.midnight;
 
   @override

examples/api/lib/cupertino/slider/cupertino_slider.0.dart

@@ -6,30 +6,28 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const CupertinoSliderApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class CupertinoSliderApp extends StatelessWidget {
+  const CupertinoSliderApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: CupertinoSliderSample(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: CupertinoSliderExample(),
     );
   }
 }
 
-class CupertinoSliderSample extends StatefulWidget {
-  const CupertinoSliderSample({Key? key}) : super(key: key);
+class CupertinoSliderExample extends StatefulWidget {
+  const CupertinoSliderExample({Key? key}) : super(key: key);
 
   @override
-  State<CupertinoSliderSample> createState() => _CupertinoSliderSampleState();
+  State<CupertinoSliderExample> createState() => _CupertinoSliderExampleState();
 }
 
-class _CupertinoSliderSampleState extends State<CupertinoSliderSample> {
+class _CupertinoSliderExampleState extends State<CupertinoSliderExample> {
   double _currentSliderValue =  0.0;
   String? _sliderStatus;
 

examples/api/lib/cupertino/text_field/cupertino_text_field.0.dart

@@ -6,30 +6,28 @@
 
 import 'package:flutter/cupertino.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const CupertinoTextFieldApp());
 
-class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
-
-  static const String _title = 'Flutter Code Sample';
+class CupertinoTextFieldApp extends StatelessWidget {
+  const CupertinoTextFieldApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return const CupertinoApp(
-      title: _title,
-      home: MyStatefulWidget(),
+      theme: CupertinoThemeData(brightness: Brightness.light),
+      home: CupertinoTextFieldExample(),
     );
   }
 }
 
-class MyStatefulWidget extends StatefulWidget {
-  const MyStatefulWidget({Key? key}) : super(key: key);
+class CupertinoTextFieldExample extends StatefulWidget {
+  const CupertinoTextFieldExample({Key? key}) : super(key: key);
 
   @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
+  State<CupertinoTextFieldExample> createState() => _CupertinoTextFieldExampleState();
 }
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+class _CupertinoTextFieldExampleState extends State<CupertinoTextFieldExample> {
   late TextEditingController _textController;
 
   @override

examples/api/test/cupertino/bottom_tab_bar/cupertino_tab_bar.0_test.dart

+// 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/cupertino.dart';
+import 'package:flutter_api_samples/cupertino/bottom_tab_bar/cupertino_tab_bar.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('Can switch between tabs', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.CupertinoTabBarApp(),
+    );
+
+    expect(find.byType(CupertinoTabBar), findsOneWidget);
+    expect(find.text('Content of tab 0'), findsOneWidget);
+
+    await tester.tap(find.text('Contacts'));
+    await tester.pump();
+
+    expect(find.text('Content of tab 2'), findsOneWidget);
+  });
+}

examples/api/test/cupertino/button/cupertino_button.0_test.dart

@@ -9,7 +9,7 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('Has 4 CupertinoButton variants', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.CupertinoButtonApp(),
     );
 
     expect(find.byType(CupertinoButton), findsNWidgets(4));

examples/api/test/cupertino/date_picker/cupertino_date_picker.0_test.dart

@@ -10,7 +10,7 @@ const Offset _kRowOffset = Offset(0.0, -50.0);
 void main() {
   testWidgets('Can change date, time and dateTime using CupertinoDatePicker', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.DatePickerApp(),
     );
     // Open the date picker.
     await tester.tap(find.text('10-26-2016'));

examples/api/test/cupertino/date_picker/cupertino_timer_picker.0_test.dart

@@ -10,7 +10,7 @@ const Offset _kRowOffset = Offset(0.0, -50.0);
 void main() {
   testWidgets('Can pick a duration from CupertinoTimerPicker', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.TimerPickerApp(),
     );
 
     // Launch the timer picker.

examples/api/test/cupertino/dialog/cupertino_action_sheet.0_test.dart

@@ -10,7 +10,7 @@ void main() {
   testWidgets('Perform an action on CupertinoActionSheet', (WidgetTester tester) async {
     const String actionText = 'Destructive Action';
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.ActionSheetApp(),
     );
 
     // Launch the CupertinoActionSheet.

examples/api/test/cupertino/dialog/cupertino_alert_dialog.0_test.dart

@@ -10,7 +10,7 @@ void main() {
   testWidgets('Perform an action on CupertinoAlertDialog', (WidgetTester tester) async {
     const String actionText = 'Yes';
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.AlertDialogApp(),
     );
 
     // Launch the CupertinoAlertDialog.

examples/api/test/cupertino/nav_bar/cupertino_navigation_bar.0_test.dart

+// 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/cupertino.dart';
+import 'package:flutter_api_samples/cupertino/nav_bar/cupertino_navigation_bar.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('CupertinoNavigationBar is semi transparent', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.NavBarApp(),
+    );
+
+    final Finder navBarFinder = find.byType(CupertinoNavigationBar);
+    expect(navBarFinder, findsOneWidget);
+    final CupertinoNavigationBar cupertinoNavigationBar = tester.widget<CupertinoNavigationBar>(navBarFinder);
+    expect(cupertinoNavigationBar.backgroundColor, CupertinoColors.systemGrey.withOpacity(0.5));
+  });
+}

examples/api/test/cupertino/nav_bar/cupertino_sliver_nav_bar.0_test.dart

@@ -11,7 +11,7 @@ const Offset dragUp = Offset(0.0, -150.0);
 void main() {
    testWidgets('Collapse and expand CupertinoSliverNavigationBar changes title position', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.SliverNavBarApp(),
     );
 
     // Large title is visible and at lower position.
@@ -25,7 +25,7 @@ void main() {
 
    testWidgets('Middle widget is visible in both collapsed and expanded states', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.SliverNavBarApp(),
     );
 
     // Navigate to a page that has both middle and large titles.
@@ -48,7 +48,7 @@ void main() {
 
    testWidgets('CupertinoSliverNavigationBar with previous route has back button', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.SliverNavBarApp(),
     );
 
     // Navigate to a page that has back button

examples/api/test/cupertino/picker/cupertino_picker.0_test.dart

@@ -10,7 +10,7 @@ const Offset _kRowOffset = Offset(0.0, -50.0);
 void main() {
   testWidgets('Change selected fruit using CupertinoPicker', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.CupertinoPickerApp(),
     );
 
     // Open the Cupertino picker.

examples/api/test/cupertino/segmented_control/cupertino_segmented_control.0_test.dart

@@ -8,12 +8,14 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('Can change a selected segmented control', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.SegmentControlApp(),
     );
 
     expect(find.text('Selected Segment: midnight'), findsOneWidget);
+
     await tester.tap(find.text('Cerulean'));
     await tester.pumpAndSettle();
+
     expect(find.text('Selected Segment: cerulean'), findsOneWidget);
   });
 }

examples/api/test/cupertino/segmented_control/cupertino_sliding_segmented_control.0_test.dart

@@ -8,7 +8,7 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('Can change a selected segmented control', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.SegmentControlApp(),
     );
 
     expect(find.text('Selected Segment: midnight'), findsOneWidget);

examples/api/test/cupertino/slider/cupertino_slider.0_test.dart

@@ -16,7 +16,7 @@ void main() {
 
   testWidgets('Can change value using CupertinoSlider', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.CupertinoSliderApp(),
     );
 
     // Check for the initial slider value.

examples/api/test/cupertino/text_field/cupertino_text_field.0.dart

@@ -2,15 +2,22 @@
 // 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_api_samples/cupertino/text_field/cupertino_text_field.0.dart' as example;
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
   testWidgets('CupertinoTextField has initial text', (WidgetTester tester) async {
     await tester.pumpWidget(
-      const example.MyApp(),
+      const example.CupertinoTextFieldApp(),
     );
 
+    expect(find.byType(CupertinoTextField), findsOneWidget);
     expect(find.text('initial text'), findsOneWidget);
+
+    await tester.enterText(find.byType(CupertinoTextField), 'new text');
+    await tester.pump();
+
+    expect(find.text('new text'), findsOneWidget);
   });
 }

packages/flutter/lib/src/cupertino/bottom_tab_bar.dart

@@ -48,7 +48,7 @@ const Color _kDefaultTabBarInactiveColor = CupertinoColors.inactiveGray;
 /// {@tool dartpad}
 /// This example shows a [CupertinoTabBar] placed in a [CupertinoTabScaffold].
 ///
-/// ** See code in examples/api/lib/cupertino/bottom_tab_bar/bottom_tab_bar.0.dart **
+/// ** See code in examples/api/lib/cupertino/bottom_tab_bar/cupertino_tab_bar.0.dart **
 /// {@end-tool}
 ///
 /// See also: