--- /dev/null
+<?php
+
+/**
+ * @file
+ * Helper module for the link generation tests.
+ */
+
+/**
+ * Implements hook_link_alter().
+ */
+function link_generation_test_link_alter(&$variables) {
+ if (\Drupal::state()->get('link_generation_test_link_alter', FALSE)) {
+ // Add a text to the end of links.
+ if (\Drupal::state()->get('link_generation_test_link_alter_safe', FALSE)) {
+ $variables['text'] = t('@text <strong>Test!</strong>', ['@text' => $variables['text']]);
+ }
+ else {
+ $variables['text'] .= ' <strong>Test!</strong>';
+ }
+ }
+}