Connection.php

<?php

declare (strict_types=1);
// cspell:ignore dummydb
namespace Drupal\dummydb\Driver\Database\dummydb;

use Drupal\mysql\Driver\Database\mysql\Connection as CoreConnection;

/**
 * DummyDB test implementation of \Drupal\Core\Database\Connection.
 */
class Connection extends CoreConnection {
  
  /**
   * {@inheritdoc}
   */
  public function driver() {
    return 'dummydb';
  }
  
  /**
   * {@inheritdoc}
   */
  public function databaseType() {
    return 'dummydb';
  }

}