Added test coverage.

Closes #3281502

src/Feeds/Target/ConfigEntityReference.php

@@ -8,6 +8,7 @@ use Drupal\Core\Config\TypedConfigManagerInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Field\FieldTypePluginManagerInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
@@ -77,13 +78,16 @@ class ConfigEntityReference extends FieldTargetBase implements ConfigurableTarge
    *   The transliteration manager.
    * @param \Drupal\Core\Config\TypedConfigManagerInterface $typed_config_manager
    *   The manager for managing config schema type plugins.
+   * @param \Drupal\Core\Field\FieldTypePluginManagerInterface|null $field_type_plugin_manager
+   *   (optional) The field type plugin manager. Passing this argument will be
+   *   required in feeds:4.0.0; omitting it is deprecated since feeds:3.1.0.
    */
-  public function __construct(array $configuration, $plugin_id, array $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityFinderInterface $entity_finder, TransliterationInterface $transliteration, TypedConfigManagerInterface $typed_config_manager) {
+  public function __construct(array $configuration, $plugin_id, array $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityFinderInterface $entity_finder, TransliterationInterface $transliteration, TypedConfigManagerInterface $typed_config_manager, ?FieldTypePluginManagerInterface $field_type_plugin_manager = NULL) {
     $this->entityTypeManager = $entity_type_manager;
     $this->entityFinder = $entity_finder;
     $this->transliteration = $transliteration;
     $this->typedConfigManager = $typed_config_manager;
-    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $field_type_plugin_manager);
   }
 
   /**
@@ -97,7 +101,8 @@ class ConfigEntityReference extends FieldTargetBase implements ConfigurableTarge
       $container->get('entity_type.manager'),
       $container->get('feeds.entity_finder'),
       $container->get('transliteration'),
-      $container->get('config.typed')
+      $container->get('config.typed'),
+      $container->get('plugin.manager.field.field_type'),
     );
   }