AddKeysExistsAssertForKeyUseRector

Find another rule

Add assertArrayHasKey() call for array access with string key, that was not validated before

 use PHPUnit\Framework\TestCase;

 final class SomeTest extends TestCase
 {
     public function test()
     {
         $data = $this->getData();
+        $this->assertArrayHasKey('key', $data);
         $this->assertSame('result', $data['key']);
     }

     private function getData(): array
     {
         // return various data
         return [];
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\AddKeysExistsAssertForKeyUseRector;

return RectorConfig::configure()
    ->withRules([
        AddKeysExistsAssertForKeyUseRector::class,
    ]);