Unit test for Laravel custom validator

MyValidator.php

<?php

use Illuminate\Validation\Validator;

class MyValidator extends Validator  {

    public function validateMutuallyExclusiveWith($attribute, $value, $parameters) {

        $allEmpty = true;
        foreach ($parameters as $key)
        {
            if (!$allEmpty)
            {
                break;
            }

            $data = array_get($this->data, $parameters[0]);
            $allEmpty = empty($data) || is_null($data);
        }

        if ($allEmpty)
        {
            echo "all other is empty!\n";
            return $this->validateRequired($attribute, $value);
        }
        else
        {
            echo "all others is NOT empty!\n";
            return !$this->validateRequired($attribute, $value);
        }
    }
}

MyValidatorTest.php

<?php

class MyValidatorTest extends TestCase {
    public function testMutuallyExclusiveWith()
    {
        $trans = $this->getRealTranslator();
        $v = new MyValidator(
            $trans,
            ['field1' => null, 'field2' => ''],
            ['field1' => 'mutually_exclusive_with:field2']);
        $this->assertFalse($v->passes());
    }

    protected function getRealTranslator()
    {
        $trans = new Symfony\Component\Translation\Translator('en', new Symfony\Component\Translation\MessageSelector);
        $trans->addLoader('array', new Symfony\Component\Translation\Loader\ArrayLoader);
        return $trans;
    }
}