Enforce `use_key_in_widget_constructors` and `file_names` lints (#913)

* Start enforcing use_key_in_widget_constructors and file_names lints * dart format * analysis fixes * analysis fixes, pt2 * analysis fixes, part 3 * Revert platform_design (test failure) * More reverts * Notate why we aren't enforcing a lint
3 years ago · e2e2713986
parent e160f5261c
commit e2e2713986
69 changed files with 174 additions and 114 deletions
--- a/add_to_app/android_view/flutter_module_using_plugin/test/widget_test.dart
+++ b/add_to_app/android_view/flutter_module_using_plugin/test/widget_test.dart
@ -6,9 +6,8 @@
 // tree, read text, and verify that the values of widget properties are correct.

 import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
 import 'package:flutter_module_using_plugin/main.dart';
+import 'package:flutter_test/flutter_test.dart';
 import 'package:provider/provider.dart';

 class MockCounterModel extends ChangeNotifier implements CounterModel {
--- a/add_to_app/books/flutter_module_books/lib/api.dart
+++ b/add_to_app/books/flutter_module_books/lib/api.dart
@ -94,6 +94,7 @@ abstract class FlutterBookApi {
      if (api == null) {
        channel.setMessageHandler(null);
      } else {
+        // ignore: avoid_types_on_closure_parameters
        channel.setMessageHandler((Object? message) async {
          assert(message != null,
              'Argument for dev.flutter.pigeon.FlutterBookApi.displayBookDetails was null.');
--- a/experimental/federated_plugin/federated_plugin_platform_interface/pubspec.yaml
+++ b/experimental/federated_plugin/federated_plugin_platform_interface/pubspec.yaml
@ -1,7 +1,6 @@
 name: federated_plugin_platform_interface
 description: A platform interface for federated_plugin.
 version: 0.0.1
-author:
 homepage:
 publish_to: none

--- a/experimental/federated_plugin/federated_plugin_windows/pubspec.yaml
+++ b/experimental/federated_plugin/federated_plugin_windows/pubspec.yaml
@ -1,7 +1,6 @@
 name: federated_plugin_windows
 description: Windows implementation of federated_plugin to retrieve current battery level.
 version: 0.0.1
-author:
 homepage:
 publish_to: none

--- a/experimental/linting_tool/analysis_options.yaml
+++ b/experimental/linting_tool/analysis_options.yaml
@ -15,10 +15,8 @@ linter:
    cancel_subscriptions: true
    close_sinks: true
    directives_ordering: true
-    file_names: false
    package_api_docs: true
    package_prefixed_library_names: true
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/experimental/web_dashboard/analysis_options.yaml
+++ b/experimental/web_dashboard/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/experimental/web_dashboard/lib/src/app.dart
+++ b/experimental/web_dashboard/lib/src/app.dart
@ -39,14 +39,16 @@ class DashboardApp extends StatefulWidget {
  final ApiBuilder apiBuilder;

  /// Runs the app using Firebase
-  DashboardApp.firebase()
+  DashboardApp.firebase({Key key})
      : auth = FirebaseAuthService(),
-        apiBuilder = _apiBuilder;
+        apiBuilder = _apiBuilder,
+        super(key: key);

  /// Runs the app using mock data
-  DashboardApp.mock()
+  DashboardApp.mock({Key key})
      : auth = MockAuthService(),
-        apiBuilder = _mockApiBuilder;
+        apiBuilder = _mockApiBuilder,
+        super(key: key);

  @override
  _DashboardAppState createState() => _DashboardAppState();
@ -84,7 +86,8 @@ class SignInSwitcher extends StatefulWidget {
  const SignInSwitcher({
    this.appState,
    this.apiBuilder,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _SignInSwitcherState createState() => _SignInSwitcherState();
--- a/experimental/web_dashboard/lib/src/pages/dashboard.dart
+++ b/experimental/web_dashboard/lib/src/pages/dashboard.dart
@ -10,6 +10,8 @@ import '../app.dart';
 import '../widgets/category_chart.dart';

 class DashboardPage extends StatelessWidget {
+  const DashboardPage({Key key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    var appState = Provider.of<AppState>(context);
@ -41,7 +43,7 @@ class DashboardPage extends StatelessWidget {
 class Dashboard extends StatelessWidget {
  final List<Category> categories;

-  const Dashboard(this.categories);
+  const Dashboard(this.categories, {Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/experimental/web_dashboard/lib/src/pages/entries.dart
+++ b/experimental/web_dashboard/lib/src/pages/entries.dart
@ -12,6 +12,8 @@ import '../widgets/categories_dropdown.dart';
 import '../widgets/dialogs.dart';

 class EntriesPage extends StatefulWidget {
+  const EntriesPage({Key key}) : super(key: key);
+
  @override
  _EntriesPageState createState() => _EntriesPageState();
 }
@ -100,7 +102,8 @@ class EntryTile extends StatelessWidget {
  const EntryTile({
    this.category,
    this.entry,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/experimental/web_dashboard/lib/src/pages/home.dart
+++ b/experimental/web_dashboard/lib/src/pages/home.dart
@ -14,7 +14,8 @@ class HomePage extends StatefulWidget {

  const HomePage({
    @required this.onSignOut,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
@ -70,7 +71,7 @@ class _HomePageState extends State<HomePage> {
    if (_pageIndex == 0) {
      showDialog<NewCategoryDialog>(
        context: context,
-        builder: (context) => NewCategoryDialog(),
+        builder: (context) => const NewCategoryDialog(),
      );
      return;
    }
@ -78,7 +79,7 @@ class _HomePageState extends State<HomePage> {
    if (_pageIndex == 1) {
      showDialog<NewEntryDialog>(
        context: context,
-        builder: (context) => NewEntryDialog(),
+        builder: (context) => const NewEntryDialog(),
      );
      return;
    }
@ -115,11 +116,11 @@ class _HomePageState extends State<HomePage> {

  static Widget _pageAtIndex(int index) {
    if (index == 0) {
-      return DashboardPage();
+      return const DashboardPage();
    }

    if (index == 1) {
-      return EntriesPage();
+      return const EntriesPage();
    }

    return const Center(child: Text('Settings page'));
--- a/experimental/web_dashboard/lib/src/pages/sign_in.dart
+++ b/experimental/web_dashboard/lib/src/pages/sign_in.dart
@ -13,7 +13,8 @@ class SignInPage extends StatelessWidget {
  const SignInPage({
    @required this.auth,
    @required this.onSuccess,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
@ -32,7 +33,8 @@ class SignInButton extends StatefulWidget {
  const SignInButton({
    @required this.auth,
    @required this.onSuccess,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _SignInButtonState createState() => _SignInButtonState();
--- a/experimental/web_dashboard/lib/src/widgets/categories_dropdown.dart
+++ b/experimental/web_dashboard/lib/src/widgets/categories_dropdown.dart
@ -16,7 +16,8 @@ class CategoryDropdown extends StatefulWidget {
  const CategoryDropdown({
    @required this.api,
    @required this.onSelected,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _CategoryDropdownState createState() => _CategoryDropdownState();
--- a/experimental/web_dashboard/lib/src/widgets/category_chart.dart
+++ b/experimental/web_dashboard/lib/src/widgets/category_chart.dart
@ -20,7 +20,8 @@ class CategoryChart extends StatelessWidget {
  const CategoryChart({
    @required this.category,
    @required this.api,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/experimental/web_dashboard/lib/src/widgets/category_forms.dart
+++ b/experimental/web_dashboard/lib/src/widgets/category_forms.dart
@ -8,6 +8,8 @@ import 'package:web_dashboard/src/api/api.dart';
 import 'package:web_dashboard/src/app.dart';

 class NewCategoryForm extends StatefulWidget {
+  const NewCategoryForm({Key key}) : super(key: key);
+
  @override
  _NewCategoryFormState createState() => _NewCategoryFormState();
 }
@ -37,7 +39,8 @@ class EditCategoryForm extends StatefulWidget {
  const EditCategoryForm({
    @required this.category,
    @required this.onDone,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _EditCategoryFormState createState() => _EditCategoryFormState();
--- a/experimental/web_dashboard/lib/src/widgets/dialogs.dart
+++ b/experimental/web_dashboard/lib/src/widgets/dialogs.dart
@ -11,10 +11,12 @@ import '../app.dart';
 import 'edit_entry.dart';

 class NewCategoryDialog extends StatelessWidget {
+  const NewCategoryDialog({Key key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
-    return SimpleDialog(
-      title: const Text('New Category'),
+    return const SimpleDialog(
+      title: Text('New Category'),
      children: <Widget>[
        NewCategoryForm(),
      ],
@ -27,7 +29,8 @@ class EditCategoryDialog extends StatelessWidget {

  const EditCategoryDialog({
    @required this.category,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
@ -51,6 +54,8 @@ class EditCategoryDialog extends StatelessWidget {
 }

 class NewEntryDialog extends StatefulWidget {
+  const NewEntryDialog({Key key}) : super(key: key);
+
  @override
  _NewEntryDialogState createState() => _NewEntryDialogState();
 }
@ -58,8 +63,8 @@ class NewEntryDialog extends StatefulWidget {
 class _NewEntryDialogState extends State<NewEntryDialog> {
  @override
  Widget build(BuildContext context) {
-    return SimpleDialog(
-      title: const Text('New Entry'),
+    return const SimpleDialog(
+      title: Text('New Entry'),
      children: [
        NewEntryForm(),
      ],
@ -74,7 +79,8 @@ class EditEntryDialog extends StatelessWidget {
  const EditEntryDialog({
    this.category,
    this.entry,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/experimental/web_dashboard/lib/src/widgets/edit_entry.dart
+++ b/experimental/web_dashboard/lib/src/widgets/edit_entry.dart
@ -11,6 +11,8 @@ import '../app.dart';
 import 'categories_dropdown.dart';

 class NewEntryForm extends StatefulWidget {
+  const NewEntryForm({Key key}) : super(key: key);
+
  @override
  _NewEntryFormState createState() => _NewEntryFormState();
 }
@ -58,7 +60,8 @@ class EditEntryForm extends StatefulWidget {
  const EditEntryForm({
    @required this.entry,
    @required this.onDone,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _EditEntryFormState createState() => _EditEntryFormState();
--- a/experimental/web_dashboard/lib/src/widgets/third_party/adaptive_scaffold.dart
+++ b/experimental/web_dashboard/lib/src/widgets/third_party/adaptive_scaffold.dart
@ -43,7 +43,8 @@ class AdaptiveScaffold extends StatefulWidget {
    @required this.destinations,
    this.onNavigationIndexChange,
    this.floatingActionButton,
-  });
+    Key key,
+  }) : super(key: key);

  @override
  _AdaptiveScaffoldState createState() => _AdaptiveScaffoldState();
--- a/platform_channels/analysis_options.yaml
+++ b/platform_channels/analysis_options.yaml
@ -12,10 +12,8 @@ linter:
    cancel_subscriptions: true
    close_sinks: true
    directives_ordering: true
-    file_names: false
    package_api_docs: true
    package_prefixed_library_names: true
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/platform_channels/lib/main.dart
+++ b/platform_channels/lib/main.dart
@ -10,19 +10,21 @@ import 'package:platform_channels/src/pet_list_screen.dart';
 import 'package:platform_channels/src/platform_image_demo.dart';

 void main() {
-  runApp(PlatformChannelSample());
+  runApp(const PlatformChannelSample());
 }

 class PlatformChannelSample extends StatelessWidget {
+  const PlatformChannelSample({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      routes: {
-        '/methodChannelDemo': (context) => MethodChannelDemo(),
-        '/eventChannelDemo': (context) => EventChannelDemo(),
-        '/platformImageDemo': (context) => PlatformImageDemo(),
-        '/petListScreen': (context) => PetListScreen(),
-        '/addPetDetails': (context) => AddPetDetails(),
+        '/methodChannelDemo': (context) => const MethodChannelDemo(),
+        '/eventChannelDemo': (context) => const EventChannelDemo(),
+        '/platformImageDemo': (context) => const PlatformImageDemo(),
+        '/petListScreen': (context) => const PetListScreen(),
+        '/addPetDetails': (context) => const AddPetDetails(),
      },
      title: 'Platform Channel Sample',
      theme: ThemeData(
@ -30,7 +32,7 @@ class PlatformChannelSample extends StatelessWidget {
          backgroundColor: Colors.blue[500],
        ),
      ),
-      home: HomePage(),
+      home: const HomePage(),
    );
  }
 }
@ -62,6 +64,8 @@ List<DemoInfo> demoList = [
 ];

 class HomePage extends StatelessWidget {
+  const HomePage({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
@ -79,7 +83,7 @@ class HomePage extends StatelessWidget {
 class DemoTile extends StatelessWidget {
  final DemoInfo demoInfo;

-  const DemoTile(this.demoInfo);
+  const DemoTile(this.demoInfo, {Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/platform_channels/lib/src/add_pet_details.dart
+++ b/platform_channels/lib/src/add_pet_details.dart
@ -10,6 +10,8 @@ import 'package:platform_channels/src/pet_list_message_channel.dart';
 /// The widget uses [TextField] and [RadioListTile] to take the [PetDetails.breed] and
 /// [PetDetails.petType] from the user respectively.
 class AddPetDetails extends StatefulWidget {
+  const AddPetDetails({Key? key}) : super(key: key);
+
  @override
  _AddPetDetailsState createState() => _AddPetDetailsState();
 }
--- a/platform_channels/lib/src/event_channel_demo.dart
+++ b/platform_channels/lib/src/event_channel_demo.dart
@ -14,6 +14,8 @@ import 'package:platform_channels/src/accelerometer_event_channel.dart';
 /// [Text] widgets to display the value of [AccelerometerReadings.x],
 /// [AccelerometerReadings.y], and [AccelerometerReadings.z] respectively.
 class EventChannelDemo extends StatelessWidget {
+  const EventChannelDemo({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    final textStyle = Theme.of(context).textTheme.headline5;
--- a/platform_channels/lib/src/method_channel_demo.dart
+++ b/platform_channels/lib/src/method_channel_demo.dart
@ -10,6 +10,8 @@ import 'package:platform_channels/src/counter_method_channel.dart';
 /// It has two [ElevatedButton]s to increment and decrement the value of
 /// [count], and a [Text] widget to display its value.
 class MethodChannelDemo extends StatefulWidget {
+  const MethodChannelDemo({Key? key}) : super(key: key);
+
  @override
  _MethodChannelDemoState createState() => _MethodChannelDemoState();
 }
--- a/platform_channels/lib/src/pet_list_screen.dart
+++ b/platform_channels/lib/src/pet_list_screen.dart
@ -9,6 +9,8 @@ import 'package:platform_channels/src/pet_list_message_channel.dart';
 /// Demonstrates how to use [BasicMessageChannel] to send & receive the platform
 /// Message.
 class PetListScreen extends StatefulWidget {
+  const PetListScreen({Key? key}) : super(key: key);
+
  @override
  _PetListScreenState createState() => _PetListScreenState();
 }
@ -59,7 +61,7 @@ class _PetListScreenState extends State<PetListScreen> {
 class BuildPetList extends StatelessWidget {
  final List<PetDetails> petList;

-  const BuildPetList(this.petList);
+  const BuildPetList(this.petList, {Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/platform_channels/lib/src/platform_image_demo.dart
+++ b/platform_channels/lib/src/platform_image_demo.dart
@ -13,6 +13,8 @@ import 'package:platform_channels/src/image_basic_message_channel.dart';
 /// The widget uses [Image.memory] to display the image obtained from the
 /// platform.
 class PlatformImageDemo extends StatefulWidget {
+  const PlatformImageDemo({Key? key}) : super(key: key);
+
  @override
  _PlatformImageDemoState createState() => _PlatformImageDemoState();
 }
--- a/platform_channels/test/home_page_test.dart
+++ b/platform_channels/test/home_page_test.dart
@ -9,7 +9,7 @@ import 'package:platform_channels/main.dart';
 void main() {
  group('HomePage tests', () {
    testWidgets('HomePage has multiple Text widgets', (tester) async {
-      await tester.pumpWidget(MaterialApp(
+      await tester.pumpWidget(const MaterialApp(
        home: HomePage(),
      ));

--- a/platform_channels/test/src/add_pet_details_test.dart
+++ b/platform_channels/test/src/add_pet_details_test.dart
@ -20,7 +20,7 @@ void main() {
    });

    testWidgets('Enter pet details', (tester) async {
-      await tester.pumpWidget(MaterialApp(home: AddPetDetails()));
+      await tester.pumpWidget(const MaterialApp(home: AddPetDetails()));

      // Enter the breed of cat.
      await tester.enterText(find.byType(TextField), 'Persian');
--- a/platform_channels/test/src/event_channel_demo_test.dart
+++ b/platform_channels/test/src/event_channel_demo_test.dart
@ -49,7 +49,7 @@ void main() {

    testWidgets('EventChannel AccelerometerReadings Stream test',
        (tester) async {
-      await tester.pumpWidget(MaterialApp(
+      await tester.pumpWidget(const MaterialApp(
        home: EventChannelDemo(),
      ));

--- a/platform_channels/test/src/method_channel_demo_test.dart
+++ b/platform_channels/test/src/method_channel_demo_test.dart
@ -26,7 +26,7 @@ void main() {
    });

    testWidgets('MethodChannelDemo count test', (tester) async {
-      await tester.pumpWidget(MaterialApp(
+      await tester.pumpWidget(const MaterialApp(
        home: MethodChannelDemo(),
      ));

--- a/platform_channels/test/src/platform_image_demo_test.dart
+++ b/platform_channels/test/src/platform_image_demo_test.dart
@ -20,7 +20,7 @@ void main() {
    });

    testWidgets('Platform Image test', (tester) async {
-      await tester.pumpWidget(MaterialApp(
+      await tester.pumpWidget(const MaterialApp(
        home: PlatformImageDemo(),
      ));

--- a/platform_design/analysis_options.yaml
+++ b/platform_design/analysis_options.yaml
@ -17,4 +17,5 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
+    # Tests fail if we enforce `use_key_in_widget_constructors`
    use_key_in_widget_constructors: false
--- a/platform_view_swift/analysis_options.yaml
+++ b/platform_view_swift/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/platform_view_swift/lib/main.dart
+++ b/platform_view_swift/lib/main.dart
@ -8,10 +8,12 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';

 void main() {
-  runApp(PlatformView());
+  runApp(const PlatformView());
 }

 class PlatformView extends StatelessWidget {
+  const PlatformView({Key key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
--- a/provider_counter/analysis_options.yaml
+++ b/provider_counter/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/provider_counter/lib/main.dart
+++ b/provider_counter/lib/main.dart
@ -18,7 +18,7 @@ void main() {
      // can own Counter's lifecycle, making sure to call `dispose`
      // when not needed anymore.
      create: (context) => Counter(),
-      child: MyApp(),
+      child: const MyApp(),
    ),
  );
 }
@ -37,6 +37,8 @@ class Counter with ChangeNotifier {
 }

 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
@ -44,12 +46,14 @@ class MyApp extends StatelessWidget {
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
-      home: MyHomePage(),
+      home: const MyHomePage(),
    );
  }
 }

 class MyHomePage extends StatelessWidget {
+  const MyHomePage({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
--- a/provider_counter/test/widget_test.dart
+++ b/provider_counter/test/widget_test.dart
@ -13,7 +13,7 @@ void main() {
    await tester.pumpWidget(
      ChangeNotifierProvider(
        create: (context) => Counter(),
-        child: MyApp(),
+        child: const MyApp(),
      ),
    );

--- a/provider_shopper/analysis_options.yaml
+++ b/provider_shopper/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/provider_shopper/lib/main.dart
+++ b/provider_shopper/lib/main.dart
@ -12,10 +12,12 @@ import 'package:provider_shopper/screens/catalog.dart';
 import 'package:provider_shopper/screens/login.dart';

 void main() {
-  runApp(MyApp());
+  runApp(const MyApp());
 }

 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    // Using MultiProvider is convenient when providing multiple objects.
@ -41,9 +43,9 @@ class MyApp extends StatelessWidget {
        theme: appTheme,
        initialRoute: '/',
        routes: {
-          '/': (context) => MyLogin(),
-          '/catalog': (context) => MyCatalog(),
-          '/cart': (context) => MyCart(),
+          '/': (context) => const MyLogin(),
+          '/catalog': (context) => const MyCatalog(),
+          '/cart': (context) => const MyCart(),
        },
      ),
    );
--- a/provider_shopper/lib/screens/cart.dart
+++ b/provider_shopper/lib/screens/cart.dart
@ -7,6 +7,8 @@ import 'package:provider/provider.dart';
 import 'package:provider_shopper/models/cart.dart';

 class MyCart extends StatelessWidget {
+  const MyCart({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
--- a/provider_shopper/lib/screens/catalog.dart
+++ b/provider_shopper/lib/screens/catalog.dart
@ -8,6 +8,8 @@ import 'package:provider_shopper/models/cart.dart';
 import 'package:provider_shopper/models/catalog.dart';

 class MyCatalog extends StatelessWidget {
+  const MyCatalog({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
--- a/provider_shopper/lib/screens/login.dart
+++ b/provider_shopper/lib/screens/login.dart
@ -5,6 +5,8 @@
 import 'package:flutter/material.dart';

 class MyLogin extends StatelessWidget {
+  const MyLogin({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
--- a/provider_shopper/test/cart_widget_test.dart
+++ b/provider_shopper/test/cart_widget_test.dart
@ -24,7 +24,7 @@ Widget createCartScreen() => MultiProvider(
          },
        ),
      ],
-      child: MaterialApp(
+      child: const MaterialApp(
        home: MyCart(),
      ),
    );
--- a/provider_shopper/test/catalog_widget_test.dart
+++ b/provider_shopper/test/catalog_widget_test.dart
@ -21,7 +21,7 @@ Widget createCatalogScreen() => MultiProvider(
          },
        ),
      ],
-      child: MaterialApp(
+      child: const MaterialApp(
        home: MyCatalog(),
      ),
    );
--- a/provider_shopper/test/login_widget_test.dart
+++ b/provider_shopper/test/login_widget_test.dart
@ -26,8 +26,8 @@ void main() {
      child: MaterialApp(
        initialRoute: '/',
        routes: {
-          '/': (context) => MyLogin(),
-          '/catalog': (context) => MyCatalog(),
+          '/': (context) => const MyLogin(),
+          '/catalog': (context) => const MyCatalog(),
        },
      ),
    ));
--- a/provider_shopper/test/widget_test.dart
+++ b/provider_shopper/test/widget_test.dart
@ -9,7 +9,7 @@ import 'package:provider_shopper/main.dart';
 void main() {
  testWidgets('smoke test', (tester) async {
    // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
+    await tester.pumpWidget(const MyApp());

    // Navigating through login page.
    await tester.tap(find.text('ENTER'));
--- a/testing_app/analysis_options.yaml
+++ b/testing_app/analysis_options.yaml
@ -12,10 +12,8 @@ linter:
    cancel_subscriptions: true
    close_sinks: true
    directives_ordering: true
-    file_names: false
    package_api_docs: true
    package_prefixed_library_names: true
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/testing_app/integration_test/app_test.dart
+++ b/testing_app/integration_test/app_test.dart
@ -12,7 +12,7 @@ void main() {
    IntegrationTestWidgetsFlutterBinding.ensureInitialized();

    testWidgets('Finding an item in the list', (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Create variables for finders that are used multiple times.
      final itemFinder = find.byKey(const ValueKey('text_25'));
@ -28,7 +28,7 @@ void main() {
    });

    testWidgets('Testing IconButtons', (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Create a finder for the icon.
      final iconFinder = find.byKey(const ValueKey('icon_0'));
@ -51,7 +51,7 @@ void main() {

    testWidgets('Verifying whether item gets added to favorites',
        (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Add item to favorites.
      await tester.tap(find.byKey(const ValueKey('icon_5')));
@ -71,7 +71,7 @@ void main() {
    });

    testWidgets('Testing remove button', (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Add item to favorites.
      await tester.tap(find.byKey(const ValueKey('icon_5')));
--- a/testing_app/integration_test/perf_test.dart
+++ b/testing_app/integration_test/perf_test.dart
@ -17,7 +17,7 @@ void main() {
    binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;

    testWidgets('Scrolling test', (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Create variables for finders that are used multiple times.
      final listFinder = find.byType(ListView);
@ -49,7 +49,7 @@ void main() {
    });

    testWidgets('Favorites operations test', (tester) async {
-      await tester.pumpWidget(TestingApp());
+      await tester.pumpWidget(const TestingApp());

      // Record the performance summary as operations are performed
      // on the favorites list.
--- a/testing_app/integration_test/state_mgmt_test.dart
+++ b/testing_app/integration_test/state_mgmt_test.dart
@ -16,7 +16,7 @@ Widget createFavoritesScreen() => ChangeNotifierProvider<Favorites>(
        favoritesList = Favorites();
        return favoritesList;
      },
-      child: MaterialApp(
+      child: const MaterialApp(
        home: FavoritesPage(),
      ),
    );
--- a/testing_app/lib/main.dart
+++ b/testing_app/lib/main.dart
@ -9,10 +9,12 @@ import 'package:testing_app/screens/favorites.dart';
 import 'package:testing_app/screens/home.dart';

 void main() {
-  runApp(TestingApp());
+  runApp(const TestingApp());
 }

 class TestingApp extends StatelessWidget {
+  const TestingApp({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider<Favorites>(
@ -24,8 +26,8 @@ class TestingApp extends StatelessWidget {
          visualDensity: VisualDensity.adaptivePlatformDensity,
        ),
        routes: {
-          HomePage.routeName: (context) => HomePage(),
-          FavoritesPage.routeName: (context) => FavoritesPage(),
+          HomePage.routeName: (context) => const HomePage(),
+          FavoritesPage.routeName: (context) => const FavoritesPage(),
        },
        initialRoute: HomePage.routeName,
      ),
--- a/testing_app/lib/screens/favorites.dart
+++ b/testing_app/lib/screens/favorites.dart
@ -9,6 +9,8 @@ import 'package:testing_app/models/favorites.dart';
 class FavoritesPage extends StatelessWidget {
  static String routeName = '/favorites_page';

+  const FavoritesPage({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
@ -34,9 +36,7 @@ class FavoritesPage extends StatelessWidget {
 class FavoriteItemTile extends StatelessWidget {
  final int itemNo;

-  const FavoriteItemTile(
-    this.itemNo,
-  );
+  const FavoriteItemTile(this.itemNo, {Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/testing_app/lib/screens/home.dart
+++ b/testing_app/lib/screens/home.dart
@ -10,6 +10,8 @@ import 'package:testing_app/screens/favorites.dart';
 class HomePage extends StatelessWidget {
  static String routeName = '/';

+  const HomePage({Key? key}) : super(key: key);
+
  @override
  Widget build(BuildContext context) {
    return Scaffold(
@ -40,9 +42,7 @@ class HomePage extends StatelessWidget {
 class ItemTile extends StatelessWidget {
  final int itemNo;

-  const ItemTile(
-    this.itemNo,
-  );
+  const ItemTile(this.itemNo, {Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/testing_app/test/favorites_test.dart
+++ b/testing_app/test/favorites_test.dart
@ -15,7 +15,7 @@ Widget createFavoritesScreen() => ChangeNotifierProvider<Favorites>(
        favoritesList = Favorites();
        return favoritesList;
      },
-      child: MaterialApp(
+      child: const MaterialApp(
        home: FavoritesPage(),
      ),
    );
--- a/testing_app/test/home_test.dart
+++ b/testing_app/test/home_test.dart
@ -10,7 +10,7 @@ import 'package:testing_app/screens/home.dart';

 Widget createHomeScreen() => ChangeNotifierProvider<Favorites>(
      create: (context) => Favorites(),
-      child: MaterialApp(
+      child: const MaterialApp(
        home: HomePage(),
      ),
    );
--- a/veggieseasons/analysis_options.yaml
+++ b/veggieseasons/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/veggieseasons/lib/main.dart
+++ b/veggieseasons/lib/main.dart
@ -18,7 +18,7 @@ void main() {
  ]);

  runApp(
-    RootRestorationScope(
+    const RootRestorationScope(
      restorationId: 'root',
      child: VeggieApp(),
    ),
@ -26,6 +26,8 @@ void main() {
 }

 class VeggieApp extends StatefulWidget {
+  const VeggieApp({Key key}) : super(key: key);
+
  @override
  State<StatefulWidget> createState() => _VeggieAppState();
 }
--- a/veggieseasons/lib/screens/details.dart
+++ b/veggieseasons/lib/screens/details.dart
@ -13,7 +13,7 @@ import 'package:veggieseasons/widgets/close_button.dart';
 import 'package:veggieseasons/widgets/trivia.dart';

 class ServingInfoChart extends StatelessWidget {
-  const ServingInfoChart(this.veggie, this.prefs);
+  const ServingInfoChart(this.veggie, this.prefs, {Key key}) : super(key: key);

  final Veggie veggie;

@ -158,7 +158,7 @@ class ServingInfoChart extends StatelessWidget {
 class InfoView extends StatelessWidget {
  final int id;

-  const InfoView(this.id);
+  const InfoView(this.id, {Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
@ -239,7 +239,7 @@ class DetailsScreen extends StatefulWidget {
  final int id;
  final String restorationId;

-  const DetailsScreen({this.id, this.restorationId});
+  const DetailsScreen({this.id, this.restorationId, Key key}) : super(key: key);

  static String show(NavigatorState navigator, int veggieId) {
    return navigator.restorablePush<void>(_routeBuilder, arguments: veggieId);
--- a/veggieseasons/lib/widgets/close_button.dart
+++ b/veggieseasons/lib/widgets/close_button.dart
@ -80,7 +80,7 @@ class _ColorChangingIconState

 /// A simple "close this modal" button that invokes a callback when pressed.
 class CloseButton extends StatefulWidget {
-  const CloseButton(this.onPressed);
+  const CloseButton(this.onPressed, {Key key}) : super(key: key);

  final VoidCallback onPressed;

--- a/veggieseasons/lib/widgets/settings_group.dart
+++ b/veggieseasons/lib/widgets/settings_group.dart
@ -14,7 +14,7 @@ import 'settings_item.dart';
 // See https://github.com/flutter/flutter/projects/29 for more info.

 class SettingsGroupHeader extends StatelessWidget {
-  const SettingsGroupHeader(this.title);
+  const SettingsGroupHeader(this.title, {Key key}) : super(key: key);

  final String title;

@ -35,7 +35,7 @@ class SettingsGroupHeader extends StatelessWidget {
 }

 class SettingsGroupFooter extends StatelessWidget {
-  const SettingsGroupFooter(this.title);
+  const SettingsGroupFooter(this.title, {Key key}) : super(key: key);

  final String title;

@ -58,8 +58,10 @@ class SettingsGroup extends StatelessWidget {
    @required this.items,
    this.header,
    this.footer,
+    Key key,
  })  : assert(items != null),
-        assert(items.isNotEmpty);
+        assert(items.isNotEmpty),
+        super(key: key);

  final List<SettingsItem> items;
  final Widget header;
--- a/veggieseasons/lib/widgets/trivia.dart
+++ b/veggieseasons/lib/widgets/trivia.dart
@ -11,7 +11,7 @@ class TriviaView extends StatefulWidget {
  final int id;
  final String restorationId;

-  const TriviaView({this.id, this.restorationId});
+  const TriviaView({this.id, this.restorationId, Key key}) : super(key: key);

  @override
  _TriviaViewState createState() => _TriviaViewState();
--- a/veggieseasons/lib/widgets/veggie_card.dart
+++ b/veggieseasons/lib/widgets/veggie_card.dart
@ -14,7 +14,8 @@ class FrostyBackground extends StatelessWidget {
    this.color,
    this.intensity = 25,
    this.child,
-  });
+    Key key,
+  }) : super(key: key);

  final Color color;
  final double intensity;
@ -105,7 +106,9 @@ class _PressableCardState extends State<PressableCard> {
 }

 class VeggieCard extends StatelessWidget {
-  const VeggieCard(this.veggie, this.isInSeason, this.isPreferredCategory);
+  const VeggieCard(this.veggie, this.isInSeason, this.isPreferredCategory,
+      {Key key})
+      : super(key: key);

  /// Veggie to be displayed by the card.
  final Veggie veggie;
--- a/veggieseasons/lib/widgets/veggie_headline.dart
+++ b/veggieseasons/lib/widgets/veggie_headline.dart
@ -12,7 +12,9 @@ class ZoomClipAssetImage extends StatelessWidget {
      {@required this.zoom,
      this.height,
      this.width,
-      @required this.imageAsset});
+      @required this.imageAsset,
+      Key key})
+      : super(key: key);

  final double zoom;
  final double height;
@ -43,7 +45,7 @@ class ZoomClipAssetImage extends StatelessWidget {
 class VeggieHeadline extends StatelessWidget {
  final Veggie veggie;

-  const VeggieHeadline(this.veggie);
+  const VeggieHeadline(this.veggie, {Key key}) : super(key: key);

  List<Widget> _buildSeasonDots(List<Season> seasons) {
    var widgets = <Widget>[];
--- a/veggieseasons/test/restoration_test.dart
+++ b/veggieseasons/test/restoration_test.dart
@ -16,7 +16,7 @@ void main() {
    AppState.debugCurrentSeason = Season.autumn;

    await tester.pumpWidget(
-      RootRestorationScope(
+      const RootRestorationScope(
        restorationId: 'root',
        child: VeggieApp(),
      ),
--- a/web/filipino_cuisine/analysis_options.yaml
+++ b/web/filipino_cuisine/analysis_options.yaml
@ -17,4 +17,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false
--- a/web/filipino_cuisine/lib/cook.dart
+++ b/web/filipino_cuisine/lib/cook.dart
@ -5,7 +5,8 @@ class Cook extends StatefulWidget {
  final String? img;
  final String? nme;

-  const Cook(this.dr, this.img, this.nme);
+  const Cook(this.dr, this.img, this.nme, {Key? key}) : super(key: key);
+
  @override
  CState createState() => CState();
 }
--- a/web/filipino_cuisine/lib/flutter_swiper.dart
+++ b/web/filipino_cuisine/lib/flutter_swiper.dart
@ -1423,7 +1423,8 @@ class SwiperPluginView extends StatelessWidget {
  final SwiperPlugin plugin;
  final SwiperPluginConfig config;

-  const SwiperPluginView(this.plugin, this.config);
+  const SwiperPluginView(this.plugin, this.config, {Key? key})
+      : super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/web/filipino_cuisine/lib/main.dart
+++ b/web/filipino_cuisine/lib/main.dart
@ -5,16 +5,17 @@ import 'package:http/http.dart' as http;
 import 'cook.dart';
 import 'flutter_swiper.dart';

-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());

 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(context) {
    final _themeData = ThemeData(
      brightness: Brightness.light,
      iconTheme: const IconThemeData(color: Colors.red),
    );
-
-  @override
-  Widget build(context) {
    return MaterialApp(
        theme: _themeData.copyWith(
          colorScheme: _themeData.colorScheme.copyWith(
@ -22,11 +23,13 @@ class MyApp extends StatelessWidget {
          ),
        ),
        title: "Filipino Cuisine",
-        home: Home());
+        home: const Home());
  }
 }

 class Home extends StatefulWidget {
+  const Home({Key? key}) : super(key: key);
+
  @override
  HState createState() => HState();
 }
--- a/web/filipino_cuisine/lib/transformer_page_view.dart
+++ b/web/filipino_cuisine/lib/transformer_page_view.dart
@ -141,7 +141,8 @@ class ParallaxColor extends StatefulWidget {
    required this.colors,
    required this.info,
    required this.child,
-  });
+    Key? key,
+  }) : super(key: key);

  @override
  State<StatefulWidget> createState() {
@ -159,7 +160,9 @@ class ParallaxContainer extends StatelessWidget {
      {required this.child,
      required this.position,
      this.translationFactor = 100.0,
-      this.opacityFactor = 1.0});
+      this.opacityFactor = 1.0,
+      Key? key})
+      : super(key: key);

  @override
  Widget build(BuildContext context) {
@ -178,13 +181,14 @@ class ParallaxImage extends StatelessWidget {
  final double imageFactor;

  ParallaxImage.asset(String name,
-      {required double position, this.imageFactor = 0.3})
+      {required double position, this.imageFactor = 0.3, Key? key})
      : image = Image.asset(name,
            fit: BoxFit.cover,
            alignment: FractionalOffset(
              0.5 + position * imageFactor,
              0.5,
-            ));
+            )),
+        super(key: key);

  @override
  Widget build(BuildContext context) {
--- a/web/filipino_cuisine/pubspec.lock
+++ b/web/filipino_cuisine/pubspec.lock
@ -14,7 +14,7 @@ packages:
      name: characters
      url: "https://pub.dartlang.org"
    source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
  charcode:
    dependency: transitive
    description:
--- a/web/samples_index/analysis_options.yaml
+++ b/web/samples_index/analysis_options.yaml
@ -19,4 +19,3 @@ linter:
    test_types_in_equals: true
    throw_in_finally: true
    unnecessary_statements: true
-    use_key_in_widget_constructors: false