[CodeQuality] Skip first class callable on StringCastDebugResponseRector (#803)

Author: samsonasik

rules-tests/CodeQuality/Rector/MethodCall/StringCastDebugResponseRector/Fixture/skip_first_class_callable.php.inc

@@ -0,0 +1,14 @@
+<?php
+
+namespace Rector\Symfony\Tests\CodeQuality\Rector\MethodCall\StringCastDebugResponseRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Response;
+
+final class SkipFirstClassCallable extends TestCase
+{
+    public function test(Response $response)
+    {
+        $this->assertSame(...);
+    }
+}

rules/CodeQuality/Rector/MethodCall/StringCastDebugResponseRector.php

@@ -82,6 +82,10 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
+        if ($node->isFirstClassCallable()) {
+            return null;
+        }
+
         // there cannot be any custom message
         $args = $node->getArgs();
         if (count($args) !== 3) {