Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
 use PHPUnit\Framework\Attributes\Test;

                     case 1:
                         self::assertSame(range(1, 250), $parameters);
 
-                        return [233, [], [],];
+                        return [
+                            233,
+                            [],
+                            [],
+                        ];
                     case 2:
                         self::assertSame(range(251, 500), $parameters);
 
-                        return [15, [], [],];
+                        return [
+                            15,
+                            [],
+                            [],
+                        ];
 
                     default:
                         throw new \OutOfBoundsException('Did not expect this to run thrice.');

PHP snippet to change

<?php

use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;

final class ImporterTest extends TestCase
{  
    #[Test]
    public function severalQueries(): void
    {
        $importer = self::createMock(Importer::class);
        $importer->expects($invokedCount)
            ->method('processFiles')
            ->willReturnCallback(function (array $parameters) use ($invokedCount): array {
                switch ($invokedCount->numberOfInvocations()) {
                    case 1:
                        self::assertSame(range(1, 250), $parameters);

                        return [233, [], [],];
                    case 2:
                        self::assertSame(range(251, 500), $parameters);

                        return [15, [], [],];

                    default:
                        throw new \OutOfBoundsException('Did not expect this to run thrice.');
                }
            });
    }
}

Applied Rules:

DataProviderArrayItemsNewLinedRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;

return RectorConfig::configure()
    // B. or few rules
    ->withRules([
        \Rector\PHPUnit\CodeQuality\Rector\ClassMethod\DataProviderArrayItemsNewLinedRector::class
    ]);

Rector version: 0594c1 - released at 2026-05-08 19:57