enhanced enum support for unnecessary_getters_setters

lib/src/rules/unnecessary_getters_setters.dart

@@ -63,6 +63,7 @@ class UnnecessaryGettersSetters extends LintRule {
       NodeLintRegistry registry, LinterContext context) {
     var visitor = _Visitor(this);
     registry.addClassDeclaration(this, visitor);
+    registry.addEnumDeclaration(this, visitor);
   }
 }
 
@@ -73,13 +74,20 @@ class _Visitor extends SimpleAstVisitor<void> {
 
   @override
   void visitClassDeclaration(ClassDeclaration node) {
+    _check(node.members);
+  }
+
+  @override
+  void visitEnumDeclaration(EnumDeclaration node) {
+    _check(node.members);
+  }
+
+  void _check(NodeList<ClassMember> members) {
     var getters = <String, MethodDeclaration>{};
     var setters = <String, MethodDeclaration>{};
 
     // Build getter/setter maps
-    var members = node.members.where(isMethod);
-
-    for (var member in members) {
+    for (var member in members.where(isMethod)) {
       var method = member as MethodDeclaration;
       if (method.isGetter) {
         getters[method.name.toString()] = method;

test/rules/all.dart

@@ -45,6 +45,7 @@ import 'tighten_type_of_initializing_formals.dart'
     as tighten_type_of_initializing_formals;
 import 'type_init_formals.dart' as type_init_formals;
 import 'unawaited_futures.dart' as unawaited_futures;
+import 'unnecessary_getters_setters.dart' as unnecessary_getters_setters;
 import 'unnecessary_null_checks.dart' as unnecessary_null_checks;
 import 'unnecessary_overrides.dart' as unnecessary_overrides;
 import 'use_is_even_rather_than_modulo.dart' as use_is_even_rather_than_modulo;
@@ -82,6 +83,7 @@ void main() {
   tighten_type_of_initializing_formals.main();
   type_init_formals.main();
   unawaited_futures.main();
+  unnecessary_getters_setters.main();
   unnecessary_null_checks.main();
   unnecessary_overrides.main();
   use_is_even_rather_than_modulo.main();

test/rules/unnecessary_getters_setters.dart

@@ -0,0 +1,40 @@
+// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
+// for details. 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:test_reflective_loader/test_reflective_loader.dart';
+
+import '../rule_test_support.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(UnnecessaryGettersSettersTest);
+  });
+}
+
+@reflectiveTest
+class UnnecessaryGettersSettersTest extends LintRuleTest {
+  @override
+  List<String> get experiments => [
+        EnableString.enhanced_enums,
+      ];
+
+  @override
+  String get lintRule => 'unnecessary_getters_setters';
+
+  @FailingTest(issue: 'https://github.com/dart-lang/linter/issues/3200')
+  test_enum() async {
+    await assertDiagnostics(r'''
+enum A {
+  a,b,c;
+  var _contents;
+  get contents => _contents;
+  set contents(value) {
+    _contents = value;
+  }
+}
+''', [
+      lint('unnecessary_getters_setters', 41, 8),
+    ]);
+  }
+}