class TestDrupal6SqlBase

class TestDrupal6SqlBase extends DrupalSqlBase {
    
    /**
     * {@inheritdoc}
     */
    public function fields() {
        return [
            'filename' => t('The path of the primary file for this item.'),
            'name' => t('The name of the item; e.g. node.'),
            'type' => t('The type of the item, either module, theme, or theme_engine.'),
            'owner' => t("A theme's 'parent'. Can be either a theme or an engine."),
            'status' => t('Boolean indicating whether or not this item is enabled.'),
            'throttle' => t('Boolean indicating whether this item is disabled when the throttle.module disables throttleable items.'),
            'bootstrap' => t("Boolean indicating whether this module is loaded during Drupal's early bootstrapping phase (e.g. even before the page cache is consulted)."),
            'schema_version' => t("The module's database schema version number."),
            'weight' => t("The order in which this module's hooks should be invoked."),
            'info' => t("A serialized array containing information from the module's .info file."),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        $query = $this->database
            ->select('system', 's')
            ->fields('s', [
            'filename',
            'name',
            'schema_version',
        ]);
        return $query;
    }
    
    /**
     * Tweaks Drupal6SqlBase to set a new database connection for tests.
     *
     * @param \Drupal\Core\Database\Connection $database
     *   The new connection to use.
     *
     * @see \Drupal\Tests\migrate\Unit\MigrateSqlTestCase
     */
    public function setDatabase(Connection $database) {
        $this->database = $database;
    }
    
    /**
     * Tweaks Drupal6SqlBase to set a new module handler for tests.
     *
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The new module handler to use.
     *
     * @see \Drupal\Tests\migrate\Unit\MigrateSqlTestCase
     */
    public function setModuleHandler(ModuleHandlerInterface $module_handler) {
        $this->moduleHandler = $module_handler;
    }
    
    /**
     * Wrapper method to test protected method moduleExists().
     */
    public function moduleExistsWrapper($module) {
        return parent::moduleExists($module);
    }
    
    /**
     * Wrapper method to test protected method getModuleSchemaVersion().
     */
    public function getModuleSchemaVersionWrapper($module) {
        return parent::getModuleSchemaVersion($module);
    }
    
    /**
     * Wrapper method to test protected method variableGet().
     */
    public function variableGetWrapper($name, $default) {
        return parent::variableGet($name, $default);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        return [];
    }

}