--- /dev/null
+<?php
+
+namespace Drupal\config_test;
+
+use Drupal\Core\Config\Entity\ConfigEntityStorage;
+use Drupal\Core\Config\Config;
+
+/**
+ * @todo.
+ */
+class ConfigTestStorage extends ConfigEntityStorage {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function importCreate($name, Config $new_config, Config $old_config) {
+ // Set a global value we can check in test code.
+ $GLOBALS['hook_config_import'] = __METHOD__;
+
+ return parent::importCreate($name, $new_config, $old_config);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function importUpdate($name, Config $new_config, Config $old_config) {
+ // Set a global value we can check in test code.
+ $GLOBALS['hook_config_import'] = __METHOD__;
+
+ return parent::importUpdate($name, $new_config, $old_config);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function importDelete($name, Config $new_config, Config $old_config) {
+ // Set a global value we can check in test code.
+ $GLOBALS['hook_config_import'] = __METHOD__;
+
+ return parent::importDelete($name, $new_config, $old_config);
+ }
+
+}