--- /dev/null
+<?php
+
+/**
+ * @file
+ * Helper module for Twig extension tests.
+ */
+
+/**
+ * Implements hook_theme().
+ */
+function twig_extension_test_theme($existing, $type, $theme, $path) {
+ return [
+ 'twig_extension_test_filter' => [
+ 'variables' => ['message' => NULL, 'safe_join_items' => NULL],
+ 'template' => 'twig_extension_test.filter',
+ ],
+ 'twig_extension_test_function' => [
+ 'render element' => 'element',
+ 'template' => 'twig_extension_test.function',
+ ],
+ ];
+}