AddReturnDocblockDataProviderRector

Find another rule

Add @return array docblock to array provider method

 use PHPUnit\Framework\TestCase;

 final class SomeTest extends TestCase
 {
     /**
      * @dataProvider provideItems()
      */
     public function testSomething(array $items)
     {
     }

+    /**
+     * @return array<array<string>>
+     */
     public function provideItems()
     {
         return [
             [['item1', 'item2']],
             [['item3', 'item4']],
         ];
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclarationDocblocks\Rector\Class_\AddReturnDocblockDataProviderRector;

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