Enable use_named_constants_lint (#82426)

analysis_options.yaml

@@ -222,7 +222,7 @@ linter:
     - use_is_even_rather_than_modulo
     - use_key_in_widget_constructors
     - use_late_for_private_fields_and_variables
-    # - use_named_constants # not yet tested
+    - use_named_constants
     - use_raw_strings
     - use_rethrow_when_possible
     # - use_setters_to_change_properties # not yet tested

packages/flutter/lib/src/material/flexible_space_bar.dart

@@ -103,7 +103,7 @@ enum StretchMode {
 ///                     decoration: BoxDecoration(
 ///                       gradient: LinearGradient(
 ///                         begin: Alignment(0.0, 0.5),
-///                         end: Alignment(0.0, 0.0),
+///                         end: Alignment.center,
 ///                         colors: <Color>[
 ///                           Color(0x60000000),
 ///                           Color(0x00000000),

packages/flutter/lib/src/widgets/restoration_properties.dart

@@ -71,7 +71,7 @@ import 'restoration.dart';
 /// ```dart
 /// class RestorableDuration extends RestorableValue<Duration> {
 ///   @override
-///   Duration createDefaultValue() => const Duration();
+///   Duration createDefaultValue() => Duration.zero;
 ///
 ///   @override
 ///   void didUpdateValue(Duration? oldValue) {
@@ -84,7 +84,7 @@ import 'restoration.dart';
 ///     if (data != null) {
 ///       return Duration(microseconds: data as int);
 ///     }
-///     return const Duration();
+///     return Duration.zero;
 ///   }
 ///
 ///   @override

packages/flutter/test/gestures/gesture_binding_resample_event_on_widget_test.dart

@@ -45,12 +45,12 @@ void main() {
         ui.PointerData(
             change: ui.PointerChange.add,
             physicalX: 0.0,
-            timeStamp: epoch + Duration.zero,
+            timeStamp: epoch,
         ),
         ui.PointerData(
             change: ui.PointerChange.down,
             physicalX: 0.0,
-            timeStamp: epoch + const Duration(milliseconds: 0),
+            timeStamp: epoch,
         ),
         ui.PointerData(
             change: ui.PointerChange.move,

packages/flutter/test/gestures/gesture_binding_resample_event_test.dart

@@ -69,7 +69,7 @@ void main() {
         ui.PointerData(
             change: ui.PointerChange.add,
             physicalX: 0.0,
-            timeStamp: epoch + const Duration(milliseconds: 0),
+            timeStamp: epoch,
         ),
         ui.PointerData(
             change: ui.PointerChange.down,

packages/flutter/test/material/elevated_button_test.dart

@@ -1142,7 +1142,7 @@ void main() {
     final Key labelKey = UniqueKey();
     final ButtonStyle style = ElevatedButton.styleFrom(
       padding: EdgeInsets.zero,
-      visualDensity: const VisualDensity(), // dx=0, dy=0
+      visualDensity: VisualDensity.standard, // dx=0, dy=0
     );
 
     await tester.pumpWidget(

packages/flutter/test/material/outlined_button_test.dart

@@ -1318,7 +1318,7 @@ void main() {
     final Key labelKey = UniqueKey();
     final ButtonStyle style = OutlinedButton.styleFrom(
       padding: EdgeInsets.zero,
-      visualDensity: const VisualDensity(), // dx=0, dy=0
+      visualDensity: VisualDensity.standard, // dx=0, dy=0
     );
 
     await tester.pumpWidget(

packages/flutter/test/material/popup_menu_test.dart

@@ -2314,7 +2314,7 @@ void main() {
                 onPressed: () {
                   showMenu<void>(
                     context: navigator.currentContext!,
-                    position: const RelativeRect.fromLTRB(0, 0, 0, 0),
+                    position: RelativeRect.fill,
                     items: const <PopupMenuItem<void>>[
                       PopupMenuItem<void>(child: Text('foo')),
                     ],

packages/flutter/test/material/text_button_test.dart

@@ -1115,7 +1115,7 @@ void main() {
     final Key labelKey = UniqueKey();
     final ButtonStyle style = TextButton.styleFrom(
       padding: EdgeInsets.zero,
-      visualDensity: const VisualDensity(), // dx=0, dy=0
+      visualDensity: VisualDensity.standard, // dx=0, dy=0
     );
 
     await tester.pumpWidget(

packages/flutter/test/services/text_input_test.dart

@@ -134,7 +134,7 @@ void main() {
     test('basic structure', () async {
       const TextInputType text = TextInputType.text;
       const TextInputType number = TextInputType.number;
-      const TextInputType number2 = TextInputType.numberWithOptions();
+      const TextInputType number2 = TextInputType.number;
       const TextInputType signed = TextInputType.numberWithOptions(signed: true);
       const TextInputType signed2 = TextInputType.numberWithOptions(signed: true);
       const TextInputType decimal = TextInputType.numberWithOptions(decimal: true);

packages/flutter/test/widgets/draggable_test.dart

@@ -3036,7 +3036,7 @@ void main() {
             feedback: const Text('Feedback'),
             dragAnchorStrategy: (Draggable<Object> widget, BuildContext context, Offset position) {
               dragAnchorStrategyCalled = true;
-              return const Offset(0, 0);
+              return Offset.zero;
             },
           ),
         ],

packages/flutter/test/widgets/shape_decoration_test.dart

@@ -123,7 +123,7 @@ Future<void> main() async {
         child: DecoratedBox(
           decoration: ShapeDecoration(
             gradient: RadialGradient(
-              focal: AlignmentDirectional(0, 1),
+              focal: AlignmentDirectional.bottomCenter,
               focalRadius: 5,
               radius: 2,
               colors: <Color>[Colors.red, Colors.black],

packages/flutter_tools/test/general.shard/bundle_builder_test.dart

@@ -31,11 +31,7 @@ void main() {
 
     await BundleBuilder().build(
       platform: TargetPlatform.ios,
-      buildInfo: const BuildInfo(
-        BuildMode.debug,
-        null,
-        treeShakeIcons: false
-      ),
+      buildInfo: BuildInfo.debug,
       project: FlutterProject.fromDirectoryTest(globals.fs.currentDirectory),
       mainPath: globals.fs.path.join('lib', 'main.dart'),
       assetDirPath: 'example',
@@ -54,11 +50,7 @@ void main() {
     expect(
       () => BundleBuilder().build(
         platform: TargetPlatform.ios,
-        buildInfo: const BuildInfo(
-          BuildMode.debug,
-          null,
-          treeShakeIcons: false
-        ),
+        buildInfo: BuildInfo.debug,
         project: FlutterProject.fromDirectoryTest(globals.fs.currentDirectory),
         mainPath: 'lib/main.dart',
         assetDirPath: 'example',