Laravel testing using built-in Validator

SomeTest.php

<?php

use Tests\TestCase;
use App\Rules\BSNRule;

class SomeTest extends TestCase
{
  public function testMe()
  {
       $data = [
         'productCode' => 10,
         'bsn' => 'US12312312312321',
       ];
       
       $this->assertArrayDataMatchesValidationRules([
            'productCode' => 'required|string|min:1|max:10',
            'bsn' => ['required', new BSNRule()],
       ], $data);
  }
}

TestCase.php

<?php

namespace Tests;

use Illuminate\Support\Facades\App;
use Illuminate\Validation\ValidationException;
use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Validator;

/**
 * Class TestCase
 */
abstract class TestCase extends BaseTestCase
{
    use CreatesApplication;
    
    /**
     * @param array $keys
     * @param array $arr
     */
    protected function assertArrayHasKeys(array $keys, array $arr): void
    {
        foreach($keys as $k){
            $this->assertArrayHasKey($k, $arr);
        }
    }

    /**
     * @param array $validationRules - ex. ['last_name' => 'required|min:6|max:100']
     * @param array $inputData - ex. ['last_name' => 'John']
     */
    protected function assertArrayDataMatchesValidationRules(array $validationRules, array $inputData): void
    {
        $defaultLocale = App::getLocale();

        App::setLocale('en');

        $validator = Validator::make(
            Arr::only($inputData, array_keys($validationRules)),
            $validationRules
        );

        try {
            $validator->validate();
        } catch (ValidationException $exception){
            dump($validator->invalid(), $validator->errors());
            throw $exception;
        } finally {
            // in case you need default locale in further testing
            App::setLocale($defaultLocale);
        }
    }
    
    
}