--- /dev/null
+<?php
+
+/**
+ * @file
+ * Install, update and uninstall functions for the router_test module.
+ */
+
+use Drupal\Core\Url;
+
+/**
+ * Implements hook_install().
+ */
+function router_test_install() {
+ // Ensure a URL can be generated for routes provided by the module during
+ // installation.
+ \Drupal::state()->set(__FUNCTION__, Url::fromRoute('router_test.1')->toString());
+}