PHPUnit custom assertion for checking a string is a valid UUID

SimpleTestCase.php

<?php

namespace Tests;

use Mockery\Adapter\Phpunit\MockeryPHPUnitIntegration;
use PHPUnit\Framework\TestCase as BaseTestCase;

class SimpleTestCase extends BaseTestCase
{
    use MockeryPHPUnitIntegration;

    public function assertIsValidUuid($uuid, string $message = '')
    {
        $pattern = '/^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i';
        self::assertRegExp($pattern, $uuid, $message);
    }
}