[Fix rubocop#12143] Fix a false positive for Lint/ToEnumArguments

Fixes rubocop#12143.

This PR fixes a false positive for `Lint/ToEnumArguments`
when using anonymous keyword arguments forwarding.

changelog/fix_a_false_positive_for_lint_to_enum_arguments.md

@@ -0,0 +1 @@
+* [#12143](https://github.com/rubocop/rubocop/issues/12143): Fix a false positive for `Lint/ToEnumArguments` when using anonymous keyword arguments forwarding. ([@koic][])

lib/rubocop/cop/lint/to_enum_arguments.rb

@@ -74,7 +74,7 @@ def arguments_match?(arguments, def_node)
           end
         end
 
-        # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength
         def argument_match?(send_arg, def_arg)
           def_arg_name = def_arg.children[0]
 
@@ -87,12 +87,14 @@ def argument_match?(send_arg, def_arg)
             send_arg.hash_type? &&
               send_arg.pairs.any? { |pair| passing_keyword_arg?(pair, def_arg_name) }
           when :kwrestarg
-            send_arg.each_child_node(:kwsplat).any? { |child| child.source == def_arg.source }
+            send_arg.each_child_node(:kwsplat, :forwarded_kwrestarg).any? do |child|
+              child.source == def_arg.source
+            end
           when :forward_arg
             send_arg.forwarded_args_type?
           end
         end
-        # rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength
       end
     end
   end

spec/rubocop/cop/lint/to_enum_arguments_spec.rb

@@ -167,4 +167,28 @@ def m(...)
       RUBY
     end
   end
+
+  context 'anonymous positional arguments forwarding', :ruby32 do
+    it 'does not register an offense when enumerator is created with the correct arguments' do
+      expect_no_offenses(<<~RUBY)
+        def do_something(*)
+          return to_enum(:do_something, *) unless block_given?
+
+          do_something_else
+        end
+      RUBY
+    end
+  end
+
+  context 'anonymous keyword arguments forwarding', :ruby32 do
+    it 'does not register an offense when enumerator is created with the correct arguments' do
+      expect_no_offenses(<<~RUBY)
+        def do_something(**)
+          return to_enum(:do_something, **) unless block_given?
+
+          do_something_else
+        end
+      RUBY
+    end
+  end
 end