NextIdTest.php

<?php

namespace Drupal\Tests\mysql\Kernel\mysql;

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

/**
 * Tests the sequences API.
 *
 * @group Database
 */
class NextIdTest extends DriverSpecificDatabaseTestBase {
    
    /**
     * The modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'database_test',
        'system',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installSchema('system', 'sequences');
    }
    
    /**
     * Tests that sequences table clear up works when a connection is closed.
     *
     * @see \Drupal\mysql\Driver\Database\mysql\Connection::__destruct()
     */
    public function testDbNextIdClosedConnection() {
        // Create an additional connection to test closing the connection.
        $connection_info = Database::getConnectionInfo();
        Database::addConnectionInfo('default', 'next_id', $connection_info['default']);
        // Get a few IDs to ensure there the clean up needs to run and there is more
        // than one row.
        Database::getConnection('next_id')->nextId();
        Database::getConnection('next_id')->nextId();
        // At this point the sequences table should contain unnecessary rows.
        $count = $this->connection
            ->select('sequences')
            ->countQuery()
            ->execute()
            ->fetchField();
        $this->assertGreaterThan(1, $count);
        // Close the connection.
        Database::closeConnection('next_id');
        // Test that \Drupal\mysql\Driver\Database\mysql\Connection::__destruct()
        // successfully trims the sequences table if the connection is closed.
        $count = $this->connection
            ->select('sequences')
            ->countQuery()
            ->execute()
            ->fetchField();
        $this->assertEquals(1, $count);
    }

}