[ticket/12683] Improve exception handling

PHPBB3-12683

tests/mock/search_backend_mock_not_available.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+class search_backend_mock_not_available extends search_backend_mock
+{
+	public function get_name(): string
+	{
+		return 'Mock unavailable search backend';
+	}
+
+	public function is_available(): bool
+	{
+		return false;
+	}
+}