ConnectionTest.php

<?php

namespace Drupal\Tests\mysql\Kernel\mysql;

use Drupal\Core\Database\Database;
use Drupal\Core\Database\DatabaseExceptionWrapper;
use Drupal\KernelTests\Core\Database\DriverSpecificDatabaseTestBase;

/**
 * MySQL-specific connection tests.
 *
 * @group Database
 */
class ConnectionTest extends DriverSpecificDatabaseTestBase {
    
    /**
     * Ensure that you cannot execute multiple statements on MySQL.
     */
    public function testMultipleStatementsForNewPhp() : void {
        $this->expectException(DatabaseExceptionWrapper::class);
        Database::getConnection('default', 'default')->query('SELECT * FROM {test}; SELECT * FROM {test_people}', [], [
            'allow_delimiter_in_query' => TRUE,
        ]);
    }

}