[TypeDeclarationDocblocks] Skip class name string return on AddReturnDocblockForCommonObjectDenominatorRector (#7252)

* [TypeDeclarationDocblocks] Skip class name string return on AddReturnDocblockForCommonObjectDenominatorRector

* Fix

* use isObject() check

Author: samsonasik

rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/skip_class_name_string.php.inc

@@ -0,0 +1,15 @@
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForCommonObjectDenominatorRector\Fixture;
+
+use PhpParser\Node\Stmt\Class_;
+
+final class SkipClassNameString
+{
+    public function run(): array
+    {
+        return [
+            Class_::class,
+        ];
+    }
+}

rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php

@@ -133,9 +133,9 @@ public function refactor(Node $node): ?Node
             }
 
             /**
-             * nested structure
+             * not an object, can be nested array, or string class as Foo::class
              */
-            if ($valueType->isArray()->yes()) {
+            if (! $valueType->isObject()->yes()) {
                 return null;
             }