ConfigTestTrait.php

<?php

namespace Drupal\Tests;

use Drupal\Core\Config\ConfigImporter;
use Drupal\Core\Config\StorageComparer;
use Drupal\Core\Config\StorageCopyTrait;
use Drupal\Core\Config\StorageInterface;

/**
 * Provides helper methods to deal with config system objects in tests.
 */
trait ConfigTestTrait {
    use StorageCopyTrait;
    
    /**
     * Returns a ConfigImporter object to import test configuration.
     *
     * @return \Drupal\Core\Config\ConfigImporter
     *   The config importer object.
     */
    protected function configImporter() {
        if (!$this->configImporter) {
            // Set up the ConfigImporter object for testing.
            $storage_comparer = new StorageComparer($this->container
                ->get('config.storage.sync'), $this->container
                ->get('config.storage'));
            $this->configImporter = new ConfigImporter($storage_comparer, $this->container
                ->get('event_dispatcher'), $this->container
                ->get('config.manager'), $this->container
                ->get('lock'), $this->container
                ->get('config.typed'), $this->container
                ->get('module_handler'), $this->container
                ->get('module_installer'), $this->container
                ->get('theme_handler'), $this->container
                ->get('string_translation'), $this->container
                ->get('extension.list.module'));
        }
        // Always recalculate the changelist when called.
        return $this->configImporter
            ->reset();
    }
    
    /**
     * Copies configuration objects from source storage to target storage.
     *
     * @param \Drupal\Core\Config\StorageInterface $source_storage
     *   The source config storage service.
     * @param \Drupal\Core\Config\StorageInterface $target_storage
     *   The target config storage service.
     */
    protected function copyConfig(StorageInterface $source_storage, StorageInterface $target_storage) {
        static::replaceStorageContents($source_storage, $target_storage);
    }

}