TestFileUsage.php

<?php

declare (strict_types=1);
namespace Drupal\service_provider_test;

use Drupal\file\FileInterface;
use Drupal\file\FileUsage\FileUsageBase;

/**
 * Test class of database file usage backend implementation.
 */
class TestFileUsage extends FileUsageBase {
  
  /**
   * {@inheritdoc}
   */
  public function add(FileInterface $file, $module, $type, $id, $count = 1) {
  }
  
  /**
   * {@inheritdoc}
   */
  public function delete(FileInterface $file, $module, $type = NULL, $id = NULL, $count = 1) {
  }
  
  /**
   * {@inheritdoc}
   */
  public function listUsage(FileInterface $file) {
    return [];
  }

}