PHP: Детерминированность

<?php // phpcs:ignore PSR1.Files.SideEffects

namespace HexletBasics\CallingFunctions\Call;

use PHPUnit\Framework\TestCase;

\HexletBasics\Functions\runScript();

class SolutionTest extends TestCase
{
    public function test()
    {
        require 'index.php';
        $randomSide = $this->getActualOutputForAssertion();
        $this->assertThat(
            $randomSide,
            $this->logicalAnd(
                $this->greaterThanOrEqual(1),
                $this->lessThanOrEqual(6)
            )
        );
    }
}