First commit

modules/image/tests/image_module_test.info

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+name = Image test
+description = Provides hook implementations for testing Image module functionality.
+package = Core
+version = VERSION
+core = 7.x
+files[] = image_module_test.module
+hidden = TRUE
+
+; Information added by Drupal.org packaging script on 2017-06-21
+version = "7.56"
+project = "drupal"
+datestamp = "1498069849"
+

modules/image/tests/image_module_test.module

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+<?php
+
+/**
+ * @file
+ * Provides Image module hook implementations for testing purposes.
+ */
+
+function image_module_test_file_download($uri) {
+  if (variable_get('image_module_test_file_download', FALSE) == $uri) {
+    return array('X-Image-Owned-By' => 'image_module_test');
+  }
+  if (variable_get('image_module_test_invalid_headers', FALSE) == $uri) {
+    return array('Content-Type' => 'image/png');
+  }
+}
+
+/**
+ * Implements hook_image_effect_info().
+ */
+function image_module_test_image_effect_info() {
+  $effects = array(
+    'image_module_test_null' => array(
+    'effect callback' => 'image_module_test_null_effect',
+    ),
+  );
+
+  return $effects;
+}
+
+/**
+ * Image effect callback; Null.
+ *
+ * @param $image
+ *   An image object returned by image_load().
+ * @param $data
+ *   An array with no attributes.
+ *
+ * @return
+ *   TRUE
+ */
+function image_module_test_null_effect(array &$image, array $data) {
+  return TRUE;
+}
+
+/**
+ * Implements hook_image_effect_info_alter().
+ *
+ * Used to keep a count of cache misses in image_effect_definitions().
+ */
+function image_module_test_image_effect_info_alter(&$effects) {
+  $image_effects_definition_called = &drupal_static(__FUNCTION__, 0);
+  $image_effects_definition_called++;
+}