skip this variable

Author: TomasVotruba

rules-tests/CodeQuality/Rector/MethodCall/WithCallbackIdenticalToStandaloneAssertsRector/Fixture/skip_this.php.inc

@@ -0,0 +1,52 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\WithCallbackIdenticalToStandaloneAssertsRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipThis extends TestCase
+{
+    private $expectedValue;
+
+    public function test()
+    {
+        $expectedValue = 100;
+        $someMock = $this->getMockBuilder('AnyType')->getMock();
+
+        $someMock->expects($this->any())
+            ->method('trans')
+            ->with(
+                $this->callback(fn ($args): bool => count($args) === 5 && $args[0] === $this->expectedValue)
+            );
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\WithCallbackIdenticalToStandaloneAssertsRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipThis extends TestCase
+{
+    private $expectedValue;
+
+    public function test()
+    {
+        $expectedValue = 100;
+        $someMock = $this->getMockBuilder('AnyType')->getMock();
+
+        $someMock->expects($this->any())
+            ->method('trans')
+            ->with(
+                $this->callback(function ($args): void {
+                    $this->assertCount(5, $args);
+                    $this->assertSame($this->expectedValue, $args[0]);
+                })
+            );
+    }
+}
+
+?>

rules/CodeQuality/Rector/MethodCall/WithCallbackIdenticalToStandaloneAssertsRector.php

@@ -251,6 +251,7 @@ private function resolveExternalClosureUses(ArrowFunction $arrowFunction): array
         }
 
         $externalVariableNames = array_unique($externalVariableNames);
+        $externalVariableNames = array_diff($externalVariableNames, ['this']);
 
         $closureUses = [];
         foreach ($externalVariableNames as $externalVariableName) {