class DatabaseStorageTest

1. 8.x drupal/core/modules/config/lib/Drupal/config/Tests/Storage/DatabaseStorageTest.php \Drupal\config\Tests\Storage\DatabaseStorageTest
2. 8.x drupal/core/modules/system/lib/Drupal/system/Tests/KeyValueStore/DatabaseStorageTest.php \Drupal\system\Tests\KeyValueStore\DatabaseStorageTest

class DatabaseStorageTest extends ConfigStorageTestBase {
  public static function getInfo() {
    return array(
      'name' => 'DatabaseStorage controller operations',
      'description' => 'Tests DatabaseStorage controller operations.',
      'group' => 'Configuration',
    );
  }
  function setUp() {
    parent::setUp();
    $schema['config'] = array(
      'description' => 'Database storage for the configuration system.',
      'fields' => array(
        'name' => array(
          'description' => 'The identifier for the configuration entry, such as module.example (the name of the file, minus the file extension).',
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => '',
        ),
        'data' => array(
          'description' => 'The raw data for this configuration entry.',
          'type' => 'blob',
          'not null' => TRUE,
          'size' => 'big',
          'translatable' => TRUE,
        ),
      ),
      'primary key' => array(
        'name',
      ),
    );
    db_create_table('config', $schema['config']);
    $this->storage = new DatabaseStorage($this->container
      ->get('database'), 'config');
    $this->invalidStorage = new DatabaseStorage($this->container
      ->get('database'), 'invalid');

    // ::listAll() verifications require other configuration data to exist.
    $this->storage
      ->write('system.performance', array());
  }
  protected function read($name) {
    $data = db_query('SELECT data FROM {config} WHERE name = :name', array(
      ':name' => $name,
    ))
      ->fetchField();
    return unserialize($data);
  }
  protected function insert($name, $data) {
    db_insert('config')
      ->fields(array(
      'name' => $name,
      'data' => $data,
    ))
      ->execute();
  }
  protected function update($name, $data) {
    db_update('config')
      ->fields(array(
      'data' => $data,
    ))
      ->condition('name', $name)
      ->execute();
  }
  protected function delete($name) {
    db_delete('config')
      ->condition('name', $name)
      ->execute();
  }

}