fix(material/a11y_assessments): add unique page title (#152148)

Adds usage of SystemChrome.setAPplicationSwitcherDescription to update the page title for the AutoComplete demo page.

[Before screenshot: example AutoComplete](https://screenshot.googleplex.com/8DpESj4QrQA2YrW)
[After screenshot: example AutoComplete](https://screenshot.googleplex.com/6AdfSA8a8VwUaXM)

Fixes b/338056490

*Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.*

*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*

dev/a11y_assessments/lib/common/dynamic_title.dart

@@ -0,0 +1,21 @@
+// 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/material.dart';
+
+class DynamicTitle extends StatelessWidget {
+  const DynamicTitle({super.key, required this.title, required this.child});
+
+  final String title;
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Title(
+      title: title,
+      color: Theme.of(context).colorScheme.primary,
+      child: child,
+    );
+  }
+}

dev/a11y_assessments/lib/main.dart

@@ -35,10 +35,11 @@ class App extends StatelessWidget {
     final Map<String, WidgetBuilder> routes =
         Map<String, WidgetBuilder>.fromEntries(
       useCases.map((UseCase useCase) =>
-          MapEntry<String, WidgetBuilder>(useCase.route, useCase.build)),
+          MapEntry<String, WidgetBuilder>(useCase.route, (BuildContext context) => useCase.buildWithTitle(context))),
     );
+
     return MaterialApp(
-      title: 'Accessibility Assessments',
+      title: 'Accessibility Assessments Home Page',
       theme: lightTheme,
       darkTheme: darkTheme,
       routes: <String, WidgetBuilder>{'/': (_) => const HomePage(), ...routes},
@@ -68,7 +69,7 @@ class HomePageState extends State<HomePage> {
         child: Builder(builder: (BuildContext context) {
           return TextButton(
             key: Key(useCase.name),
-            onPressed: () => Navigator.of(context).pushNamed(useCase.route),
+            onPressed: () => Navigator.of(context).pushNamed(useCase.route, arguments: useCase.name),
             child: Text(useCase.name),
           );
         }));
@@ -76,9 +77,10 @@ class HomePageState extends State<HomePage> {
 
   @override
   Widget build(BuildContext context) {
+
     return Scaffold(
       appBar: AppBar(
-        title: Semantics(headingLevel: 1, child: const Text('Accessibility Assessments')),
+      title: Semantics(headingLevel: 1, child: const Text('Accessibility Assessments')),
       ),
       body: Center(
         child: ListView(

dev/a11y_assessments/lib/use_cases/action_chip.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class ActionChipUseCase extends UseCase {
@@ -26,12 +26,15 @@ class MainWidget extends StatefulWidget {
 
 class MainWidgetState extends State<MainWidget> {
   bool favorite = false;
+
+  String pageTitle = getUseCaseName(ActionChipUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel:1, child: const Text('ActionChip')),
+        title: Semantics(headingLevel:1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: Column(

dev/a11y_assessments/lib/use_cases/auto_complete.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class AutoCompleteUseCase extends UseCase {
@@ -45,12 +45,14 @@ class _MainWidgetState extends State<_MainWidget> {
     );
   }
 
+  String pageTitle = getUseCaseName(AutoCompleteUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('AutoComplete Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: Column(

dev/a11y_assessments/lib/use_cases/badge.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class BadgeUseCase extends UseCase {
@@ -25,13 +25,14 @@ class MainWidget extends StatefulWidget {
 }
 
 class MainWidgetState extends State<MainWidget> {
+  String pageTitle = getUseCaseName(BadgeUseCase());
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Badge Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: const Center(
         child: Badge(

dev/a11y_assessments/lib/use_cases/card.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class CardUseCase extends UseCase {
@@ -26,12 +26,15 @@ class MainWidget extends StatefulWidget {
 
 class MainWidgetState extends State<MainWidget> {
   bool favorite = false;
+
+  String pageTitle = getUseCaseName(CardUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Card')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: const Center(
         child: Column(

dev/a11y_assessments/lib/use_cases/check_box_list_tile.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class CheckBoxListTile extends UseCase {
@@ -25,11 +25,13 @@ class _MainWidget extends StatefulWidget {
 class _MainWidgetState extends State<_MainWidget> {
   bool _checked = false;
 
+  String pageTitle = getUseCaseName(CheckBoxListTile());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Semantics(headingLevel: 1, child: const Text('CheckBoxListTile Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: ListView(
         children: <Widget>[

dev/a11y_assessments/lib/use_cases/date_picker.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class DatePickerUseCase extends UseCase {
@@ -25,12 +25,15 @@ class _MainWidget extends StatefulWidget {
 }
 
 class _MainWidgetState extends State<_MainWidget> {
+
+  String pageTitle = getUseCaseName(DatePickerUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('DatePicker Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: TextButton(

dev/a11y_assessments/lib/use_cases/dialog.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class DialogUseCase extends UseCase {
@@ -14,17 +14,20 @@ class DialogUseCase extends UseCase {
   String get route => '/dialog';
 
   @override
-  Widget build(BuildContext context) => const _MainWidget();
+  Widget build(BuildContext context) => _MainWidget();
 }
 
 class _MainWidget extends StatelessWidget {
-  const _MainWidget();
+  _MainWidget();
+
+  final String pageTitle = getUseCaseName(DialogUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Dialog Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: TextButton(

dev/a11y_assessments/lib/use_cases/drawer.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class DrawerUseCase extends UseCase {
@@ -27,12 +27,14 @@ class DrawerExample extends StatefulWidget {
 class _DrawerExampleState extends State<DrawerExample> {
   String selectedPage = '';
 
+  String pageTitle = getUseCaseName(DrawerUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Drawer Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       endDrawer: Drawer(
         child: ListView(

dev/a11y_assessments/lib/use_cases/expansion_tile.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class ExpansionTileUseCase extends UseCase {
@@ -27,12 +27,14 @@ class ExpansionTileExample extends StatefulWidget {
 class _ExpansionTileExampleState extends State<ExpansionTileExample> {
   bool _customTileExpanded = false;
 
+  String pageTitle = getUseCaseName(ExpansionTileUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('ExpansionTile')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Column(
         children: <Widget>[
@@ -47,9 +49,7 @@ class _ExpansionTileExampleState extends State<ExpansionTileExample> {
             title: const Text('ExpansionTile 2'),
             subtitle: const Text('Custom expansion arrow icon'),
             trailing: Icon(
-              _customTileExpanded
+              _customTileExpanded ? Icons.arrow_drop_down_circle : Icons.arrow_drop_down,
-                  ? Icons.arrow_drop_down_circle
-                  : Icons.arrow_drop_down,
             ),
             children: const <Widget>[
               ListTile(title: Text('This is tile number 2')),

dev/a11y_assessments/lib/use_cases/material_banner.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class MaterialBannerUseCase extends UseCase {
@@ -29,6 +29,8 @@ class MainWidgetState extends State<MainWidget> {
   final FocusNode dismissButtonFocusNode = FocusNode();
   final FocusNode showButtonFocusNode = FocusNode();
 
+  String pageTitle = getUseCaseName(MaterialBannerUseCase());
+
   @override
   void dispose() {
     dismissButtonFocusNode.dispose();
@@ -62,10 +64,10 @@ class MainWidgetState extends State<MainWidget> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return  Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('MaterialBanner Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: ElevatedButton(

dev/a11y_assessments/lib/use_cases/navigation_bar.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class NavigationBarUseCase extends UseCase {
@@ -27,12 +27,14 @@ class MainWidget extends StatefulWidget {
 class MainWidgetState extends State<MainWidget> {
   int currentPageIndex = 0;
 
+  String pageTitle = getUseCaseName(NavigationBarUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('NavigationBar Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       bottomNavigationBar: NavigationBar(
         onDestinationSelected: (int index) {

dev/a11y_assessments/lib/use_cases/navigation_drawer.dart

@@ -2,10 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/material.dart';
 
+import 'package:flutter/material.dart';
+import '../utils.dart';
 import 'use_cases.dart';
 
+
 class ExampleDestination {
   const ExampleDestination(this.label, this.icon, this.selectedIcon);
 
@@ -58,12 +60,14 @@ class _NavigationDrawerExampleState extends State<NavigationDrawerExample> {
     scaffoldKey.currentState!.openEndDrawer();
   }
 
+  String pageTitle = getUseCaseName(NavigationDrawerUseCase());
+
   Widget buildDrawerScaffold(BuildContext context) {
     return Scaffold(
       key: scaffoldKey,
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Navigation Drawer Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: SafeArea(
         bottom: false,

dev/a11y_assessments/lib/use_cases/navigation_rail.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class NavigationRailUseCase extends UseCase {
@@ -31,6 +31,8 @@ class _NavRailExampleState extends State<NavRailExample> {
   bool showTrailing = false;
   double groupAlignment = -1.0;
 
+  String pageTitle = getUseCaseName(NavigationRailUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(

dev/a11y_assessments/lib/use_cases/radio_list_tile.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class RadioListTileUseCase extends UseCase {
@@ -33,11 +33,13 @@ class _MainWidgetState extends State<_MainWidget> {
     });
   }
 
+  String pageTitle = getUseCaseName(RadioListTileUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Semantics(headingLevel: 1, child: const Text('Radio button demo'))
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo'))
       ),
       body: ListView(
         children: <Widget>[

dev/a11y_assessments/lib/use_cases/slider.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class SliderUseCase extends UseCase {
@@ -28,12 +28,14 @@ class MainWidgetState extends State<MainWidget> {
   double currentSliderValue = 20;
   static const String accessibilityLabel = 'Accessibility Test Slider';
 
+  String pageTitle = getUseCaseName(SliderUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('Slider demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle demo')),
       ),
       body: Center(
         child: Semantics(

dev/a11y_assessments/lib/use_cases/snack_bar.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class SnackBarUseCase extends UseCase {
@@ -25,12 +25,15 @@ class MainWidget extends StatefulWidget {
 }
 
 class MainWidgetState extends State<MainWidget> {
+
+  String pageTitle = getUseCaseName(SnackBarUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('SnackBar')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: Column(

dev/a11y_assessments/lib/use_cases/switch_list_tile.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class SwitchListTileUseCase extends UseCase {
@@ -27,12 +27,15 @@ class SwitchListTileExample extends StatefulWidget {
 class _SwitchListTileExampleState extends State<SwitchListTileExample> {
   bool _lights1 = false;
   bool _lights2 = false;
+
+  String pageTitle = getUseCaseName(SwitchListTileUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('SwitchListTile')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: Column(

dev/a11y_assessments/lib/use_cases/text_button.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class TextButtonUseCase extends UseCase {
@@ -27,12 +27,14 @@ class MainWidget extends StatefulWidget {
 class MainWidgetState extends State<MainWidget> {
   int _count = 0;
 
+  String pageTitle = getUseCaseName(TextButtonUseCase());
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('TextButton Demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: Center(
         child: Column(
@@ -45,9 +47,7 @@ class MainWidgetState extends State<MainWidget> {
                   const Text('This is a TextButton:'),
                   TextButton(
                     onPressed: () {
-                      setState(() {
+                      setState(() { _count++; });
-                        _count++;
-                      });
                     },
                     child: const Text('Action'),
                   ),

dev/a11y_assessments/lib/use_cases/text_field.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class TextFieldUseCase extends UseCase {
@@ -14,18 +14,20 @@ class TextFieldUseCase extends UseCase {
   String get route => '/text-field';
 
   @override
-  Widget build(BuildContext context) => const _MainWidget();
+  Widget build(BuildContext context) => _MainWidget();
 }
 
 class _MainWidget extends StatelessWidget {
-  const _MainWidget();
+  _MainWidget();
+
+  final String pageTitle = getUseCaseName(TextFieldUseCase());
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('TextField demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: ListView(
         children: <Widget>[

dev/a11y_assessments/lib/use_cases/text_field_password.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-
+import '../utils.dart';
 import 'use_cases.dart';
 
 class TextFieldPasswordUseCase extends UseCase {
@@ -14,18 +14,20 @@ class TextFieldPasswordUseCase extends UseCase {
   String get route => '/text-field-password';
 
   @override
-  Widget build(BuildContext context) => const _MainWidget();
+  Widget build(BuildContext context) => _MainWidget();
 }
 
 class _MainWidget extends StatelessWidget {
-  const _MainWidget();
+  _MainWidget();
+
+  final String pageTitle = getUseCaseName(TextFieldPasswordUseCase());
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Semantics(headingLevel: 1, child: const Text('TextField password demo')),
+        title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
       ),
       body: ListView(
         children: const <Widget>[

dev/a11y_assessments/lib/use_cases/use_cases.dart

@@ -4,6 +4,7 @@
 
 import 'package:flutter/widgets.dart';
 
+import '../common/dynamic_title.dart';
 import 'action_chip.dart';
 import 'auto_complete.dart';
 import 'badge.dart';
@@ -28,6 +29,14 @@ import 'text_field_password.dart';
 abstract class UseCase {
   String get name;
   String get route;
+
+  Widget buildWithTitle(BuildContext context) {
+      return DynamicTitle(
+      title: name,
+      child: build(context),
+    );
+  }
+
   Widget build(BuildContext context);
 }
 

dev/a11y_assessments/lib/utils.dart

@@ -0,0 +1,7 @@
+// 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 './use_cases/use_cases.dart';
+
+String getUseCaseName(UseCase useCase) => useCase.name;

dev/a11y_assessments/test/action_chip_test.dart

@@ -13,4 +13,11 @@ void main() {
     await pumpsUseCase(tester, ActionChipUseCase());
     expect(find.byType(ActionChip), findsExactly(2));
   });
+
+  testWidgets('action chip has one h1 tag', (WidgetTester tester) async {
+    await pumpsUseCase(tester, ActionChipUseCase());
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel(RegExp('ActionChip Demo'));
+    await tester.pumpAndSettle();
+    expect(findHeadingLevelOnes, findsOne);
+  });
 }

dev/a11y_assessments/test/card_test.dart

@@ -13,4 +13,11 @@ void main() {
     await pumpsUseCase(tester, CardUseCase());
     expect(find.byType(Card), findsExactly(1));
   });
+
+  testWidgets('card has one h1 tag', (WidgetTester tester) async {
+    await pumpsUseCase(tester, CardUseCase());
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel(RegExp('Card Demo'));
+    await tester.pumpAndSettle();
+    expect(findHeadingLevelOnes, findsOne);
+  });
 }

dev/a11y_assessments/test/drawer_test.dart

@@ -23,7 +23,7 @@ void main() {
 
   testWidgets('drawer has one h1 tag', (WidgetTester tester) async {
     await pumpsUseCase(tester, DrawerUseCase());
-    final Finder findHeadingLevelOnes = find.bySemanticsLabel('Drawer Demo');
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('drawer Demo');
     await tester.pumpAndSettle();
     expect(findHeadingLevelOnes, findsOne);
   });

dev/a11y_assessments/test/expansion_tile_test.dart

@@ -9,8 +9,15 @@ import 'package:flutter_test/flutter_test.dart';
 import 'test_utils.dart';
 
 void main() {
-  testWidgets('action chip can run', (WidgetTester tester) async {
+  testWidgets('expansion tile can run', (WidgetTester tester) async {
     await pumpsUseCase(tester, ExpansionTileUseCase());
     expect(find.byType(ExpansionTile), findsExactly(3));
   });
+
+  testWidgets('exapansion tile has one h1 tag', (WidgetTester tester) async {
+    await pumpsUseCase(tester, ExpansionTileUseCase());
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('ExpansionTile Demo');
+    await tester.pumpAndSettle();
+    expect(findHeadingLevelOnes, findsOne);
+  });
 }

dev/a11y_assessments/test/home_page_test.dart

@@ -2,11 +2,36 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// ignore_for_file: avoid_dynamic_calls
+
 import 'package:a11y_assessments/main.dart';
+import 'package:a11y_assessments/use_cases/action_chip.dart';
+import 'package:a11y_assessments/use_cases/auto_complete.dart';
+import 'package:a11y_assessments/use_cases/badge.dart';
+import 'package:a11y_assessments/use_cases/card.dart';
+import 'package:a11y_assessments/use_cases/check_box_list_tile.dart';
+import 'package:a11y_assessments/use_cases/date_picker.dart';
+import 'package:a11y_assessments/use_cases/dialog.dart';
+import 'package:a11y_assessments/use_cases/drawer.dart';
+import 'package:a11y_assessments/use_cases/expansion_tile.dart';
+import 'package:a11y_assessments/use_cases/material_banner.dart';
+import 'package:a11y_assessments/use_cases/navigation_bar.dart';
+import 'package:a11y_assessments/use_cases/navigation_drawer.dart';
+import 'package:a11y_assessments/use_cases/navigation_rail.dart';
+import 'package:a11y_assessments/use_cases/radio_list_tile.dart';
+import 'package:a11y_assessments/use_cases/slider.dart';
+import 'package:a11y_assessments/use_cases/snack_bar.dart';
+import 'package:a11y_assessments/use_cases/switch_list_tile.dart';
+import 'package:a11y_assessments/use_cases/text_button.dart';
+import 'package:a11y_assessments/use_cases/text_field.dart';
+import 'package:a11y_assessments/use_cases/text_field_password.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:material_color_utilities/material_color_utilities.dart';
 
+import 'test_utils.dart';
+
 void main() {
   testWidgets('Has light and dark theme', (WidgetTester tester) async {
     await tester.pumpWidget(const App());
@@ -141,6 +166,149 @@ void main() {
         MaterialDynamicColors.inversePrimary.getArgb(highContrastScheme));
   });
 
+  testWidgets('Each A11y Assessments page has a unique page title.', (WidgetTester tester) async {
+    final List<MethodCall> log = <MethodCall>[];
+
+    tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.platform, (MethodCall methodCall) async {
+      if (methodCall.method == 'SystemChrome.setApplicationSwitcherDescription') {
+        log.add(methodCall);
+      }
+      return null;
+    });
+
+    await tester.pumpWidget(Title(
+      color: const Color(0xFF00FF00),
+      title: 'Accessibility Assessments',
+      child: Container(),
+    ));
+    expect(log[0], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'Accessibility Assessments', 'primaryColor': 4278255360},
+    ));
+
+    await pumpsUseCase(tester, AutoCompleteUseCase());
+    expect(log[2], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'AutoComplete', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, ActionChipUseCase());
+    expect(log[4], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'ActionChip', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, BadgeUseCase());
+    expect(log[6], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'Badge', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, CardUseCase());
+    expect(log[8], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'Card', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, CheckBoxListTile());
+    expect(log[10], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'CheckBoxListTile', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, DatePickerUseCase());
+    expect(log[12], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'DatePicker', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, DialogUseCase());
+    expect(log[14], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'Dialog', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, ExpansionTileUseCase());
+    expect(log[16], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'ExpansionTile', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, MaterialBannerUseCase());
+    expect(log[18], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'MaterialBanner', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, NavigationBarUseCase());
+    expect(log[20], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'NavigationBar', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, RadioListTileUseCase());
+    expect(log[22], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'RadioListTile', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, SliderUseCase());
+    expect(log[24], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'Slider', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, SnackBarUseCase());
+    expect(log[26], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'SnackBar', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, SwitchListTileUseCase());
+    expect(log[28], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'SwitchListTile', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, TextButtonUseCase());
+    expect(log[30], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'TextButton', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, TextFieldUseCase());
+    expect(log[32], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'TextField', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, TextFieldPasswordUseCase());
+    expect(log[34], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'TextField password', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, NavigationDrawerUseCase());
+    expect(log[36], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'NavigationDrawer', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, NavigationRailUseCase());
+    expect(log[38], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'NavigationRail', 'primaryColor': 4284960932},
+    ));
+
+    await pumpsUseCase(tester, DrawerUseCase());
+    expect(log[40], isMethodCall(
+      'SystemChrome.setApplicationSwitcherDescription',
+      arguments: <String, dynamic>{'label': 'drawer', 'primaryColor': 4284960932},
+    ));
+
+
+  });
+
   testWidgets('a11y assessments home page has one h1 tag', (WidgetTester tester) async {
     await tester.pumpWidget(const App());
     final Finder findHeadingLevelOnes = find.bySemanticsLabel('Accessibility Assessments');

dev/a11y_assessments/test/navigation_drawer_test.dart

@@ -23,7 +23,7 @@ void main() {
 
   testWidgets('navigation drawer has one h1 tag', (WidgetTester tester) async {
     await pumpsUseCase(tester, NavigationDrawerUseCase());
-    final Finder findHeadingLevelOnes = find.bySemanticsLabel('Navigation Drawer Demo');
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('NavigationDrawer Demo');
     await tester.pumpAndSettle();
     expect(findHeadingLevelOnes, findsOne);
   });

dev/a11y_assessments/test/radio_list_tile_test.dart

@@ -15,9 +15,9 @@ void main() {
     expect(find.text('Jefferson'), findsOneWidget);
   });
 
-  testWidgets('radio button demo page has one h1 tag', (WidgetTester tester) async {
+  testWidgets('radio list tile demo page has one h1 tag', (WidgetTester tester) async {
     await pumpsUseCase(tester, RadioListTileUseCase());
-    final Finder findHeadingLevelOnes = find.bySemanticsLabel('Radio button demo');
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('RadioListTile Demo');
     await tester.pumpAndSettle();
     expect(findHeadingLevelOnes, findsOne);
   });

dev/a11y_assessments/test/snack_bar_test.dart

@@ -17,4 +17,11 @@ void main() {
     await tester.pump();
     expect(find.text(snackBarText), findsOneWidget);
   });
+
+  testWidgets('snack bar demo page has one h1 tag', (WidgetTester tester) async {
+    await pumpsUseCase(tester, SnackBarUseCase());
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('SnackBar Demo');
+    await tester.pumpAndSettle();
+    expect(findHeadingLevelOnes, findsOne);
+  });
 }

dev/a11y_assessments/test/switch_list_tile_test.dart

@@ -9,8 +9,15 @@ import 'package:flutter_test/flutter_test.dart';
 import 'test_utils.dart';
 
 void main() {
-  testWidgets('action chip can run', (WidgetTester tester) async {
+  testWidgets('switch list can run', (WidgetTester tester) async {
     await pumpsUseCase(tester, SwitchListTileUseCase());
     expect(find.byType(SwitchListTile), findsExactly(2));
   });
+
+  testWidgets('switch list demo page has one h1 tag', (WidgetTester tester) async {
+    await pumpsUseCase(tester, SwitchListTileUseCase());
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('SwitchListTile Demo');
+    await tester.pumpAndSettle();
+    expect(findHeadingLevelOnes, findsOne);
+  });
 }

dev/a11y_assessments/test/test_utils.dart

@@ -10,7 +10,7 @@ Future<void> pumpsUseCase(WidgetTester tester, UseCase useCase) async {
   await tester.pumpWidget(MaterialApp(
     home: Builder(
       builder: (BuildContext context) {
-        return useCase.build(context);
+        return useCase.buildWithTitle(context);
       },
     ),
   ));

dev/a11y_assessments/test/text_field_password_test.dart

@@ -53,7 +53,7 @@ void main() {
 
   testWidgets('text field password demo page has one h1 tag', (WidgetTester tester) async {
     await pumpsUseCase(tester, TextFieldPasswordUseCase());
-    final Finder findHeadingLevelOnes = find.bySemanticsLabel('TextField password demo');
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('TextField password Demo');
     await tester.pumpAndSettle();
     expect(findHeadingLevelOnes, findsOne);
   });

dev/a11y_assessments/test/text_field_test.dart

@@ -67,7 +67,7 @@ void main() {
 
   testWidgets('text field demo page has one h1 tag', (WidgetTester tester) async {
     await pumpsUseCase(tester, TextFieldUseCase());
-    final Finder findHeadingLevelOnes = find.bySemanticsLabel('TextField demo');
+    final Finder findHeadingLevelOnes = find.bySemanticsLabel('TextField Demo');
     await tester.pumpAndSettle();
     expect(findHeadingLevelOnes, findsOne);
   });