[Fix #9582] Fix incorrect auto-correct for `Style/ClassEqualityCompar…

…ison`

Fixes #9582.

This PR fixes incorrect auto-correct for `Style/ClassEqualityComparison`
when comparing `Module#name` for equality.

changelog/fix_incorrect_autocorrect_for_style_class_equality_comparison.md

@@ -0,0 +1 @@
+* [#9582](https://github.com/rubocop/rubocop/issues/9582): Fix incorrect auto-correct for `Style/ClassEqualityComparison` when comparing `Module#name` for equality. ([@koic][])

lib/rubocop/cop/style/class_equality_comparison.rb

@@ -50,6 +50,8 @@ def on_send(node)
 
         def class_name(class_node, node)
           if node.children.first.method?(:name)
+            return class_node.receiver.source if class_node.receiver
+
             class_node.source.delete('"').delete("'")
           else
             class_node.source

spec/rubocop/cop/style/class_equality_comparison_spec.rb

@@ -49,6 +49,17 @@
     RUBY
   end
 
+  it 'registers an offense and corrects when comparing `Module#name` for equality' do
+    expect_offense(<<~RUBY)
+      var.class.name == Date.name
+          ^^^^^^^^^^^^^^^^^^^^^^^ Use `instance_of?(Date)` instead of comparing classes.
+    RUBY
+
+    expect_correction(<<~RUBY)
+      var.instance_of?(Date)
+    RUBY
+  end
+
   it 'registers an offense and corrects when comparing double quoted class name for equality' do
     expect_offense(<<~RUBY)
       var.class.name == "Date"