class FieldDiscoveryTestClass

class FieldDiscoveryTestClass extends FieldDiscovery {
  
  /**
   * An array of test data.
   *
   * @var array
   */
  protected $testData;
  
  /**
   * Constructs a FieldDiscoveryTestClass object.
   *
   * @param \Drupal\migrate_drupal\Plugin\MigrateFieldPluginManagerInterface $field_plugin_manager
   *   The field plugin manager.
   * @param \Drupal\migrate\Plugin\MigrationPluginManagerInterface $migration_plugin_manager
   *   The migration plugin manager.
   * @param \Psr\Log\LoggerInterface $logger
   *   The logger.
   * @param array $test_data
   *   An array of test data, keyed by method name, for overridden methods to
   *   return for the purposes of testing other methods.
   */
  public function __construct(MigrateFieldPluginManagerInterface $field_plugin_manager, MigrationPluginManagerInterface $migration_plugin_manager, LoggerInterface $logger, array $test_data = []) {
    parent::__construct($field_plugin_manager, $migration_plugin_manager, $logger);
    $this->testData = $test_data;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getAllFields($core) {
    if (!empty($this->testData['getAllFields'][$core])) {
      return $this->testData['getAllFields'][$core];
    }
    return parent::getAllFields($core);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getBundleFields($core, $entity_type_id, $bundle) {
    return parent::getBundleFields($core, $entity_type_id, $bundle);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getEntityFields($core, $entity_type_id) {
    return parent::getEntityFields($core, $entity_type_id);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFieldInstanceStubMigrationDefinition($core) {
    return parent::getFieldInstanceStubMigrationDefinition($core);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCoreVersion(MigrationInterface $migration) {
    return parent::getCoreVersion($migration);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFieldPlugin($field_type, MigrationInterface $migration) {
    return parent::getFieldPlugin($field_type, $migration);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getSourcePlugin($core) {
    return parent::getSourcePlugin($core);
  }

}