SessionTestTrait.php

<?php

namespace Drupal\Tests;

use Symfony\Component\HttpFoundation\Request;

/**
 * Provides methods to generate and get session name in tests.
 */
trait SessionTestTrait {
    
    /**
     * The name of the session cookie.
     *
     * @var string
     */
    protected $sessionName;
    
    /**
     * Generates a session cookie name.
     *
     * @param string $data
     *   The data to generate session name.
     */
    protected function generateSessionName($data) {
        $prefix = Request::createFromGlobals()->isSecure() ? 'SSESS' : 'SESS';
        $this->sessionName = $prefix . substr(hash('sha256', $data), 0, 32);
    }
    
    /**
     * Returns the session name in use on the child site.
     *
     * @return string
     *   The name of the session cookie.
     */
    protected function getSessionName() {
        return $this->sessionName;
    }

}