[CodeQuality] Skip in static arrow function on PreferPHPUnitThisCallRector (#496)

Author: samsonasik

rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitThisCallRector/Fixture/skip_in_static_arrow_function.php.inc

@@ -0,0 +1,15 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\Class_\PreferPHPUnitThisCallRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipInStaticArrowFunction extends TestCase
+{
+    public function testMe()
+    {
+        static fn() => self::assertSame(1, 1);
+    }
+}
+
+?>

rules/CodeQuality/Rector/Class_/PreferPHPUnitThisCallRector.php

@@ -5,6 +5,7 @@
 namespace Rector\PHPUnit\CodeQuality\Rector\Class_;
 
 use PhpParser\Node;
+use PhpParser\Node\Expr\ArrowFunction;
 use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Expr\StaticCall;
@@ -79,7 +80,7 @@ public function refactor(Node $node): ?Node
         $hasChanged = false;
 
         $this->traverseNodesWithCallable($node, function (Node $node) use (&$hasChanged): int|null|MethodCall {
-            $isInsideStaticFunctionLike = ($node instanceof ClassMethod && $node->isStatic()) || ($node instanceof Closure && $node->static);
+            $isInsideStaticFunctionLike = ($node instanceof ClassMethod && $node->isStatic()) || (($node instanceof Closure || $node instanceof ArrowFunction) && $node->static);
             if ($isInsideStaticFunctionLike) {
                 return NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
             }