--- /dev/null
+<?php
+
+/**
+ * @file
+ * Provides Image module hook implementations for testing purposes.
+ */
+
+use Drupal\image\ImageStyleInterface;
+
+function image_module_test_file_download($uri) {
+ $default_uri = \Drupal::state()->get('image.test_file_download') ?: FALSE;
+ if ($default_uri == $uri) {
+ return ['X-Image-Owned-By' => 'image_module_test'];
+ }
+}
+
+/**
+ * Implements hook_image_effect_info_alter().
+ *
+ * Used to keep a count of cache misses in \Drupal\image\ImageEffectManager.
+ */
+function image_module_test_image_effect_info_alter(&$effects) {
+ $image_effects_definition_called = &drupal_static(__FUNCTION__, 0);
+ $image_effects_definition_called++;
+}
+
+/**
+ * Implements hook_image_style_presave().
+ *
+ * Used to save test third party settings in the image style entity.
+ */
+function image_module_test_image_style_presave(ImageStyleInterface $style) {
+ $style->setThirdPartySetting('image_module_test', 'foo', 'bar');
+}