test: add Pest unit tests for XML import payload helper

Author: somethingwithproof

tests/Unit/SyslogImportPayloadTest.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+// Stubs for Cacti core functions used in functions.php
+if (!function_exists('get_nfilter_request_var')) {
+    function get_nfilter_request_var($name) { return $_POST[$name] ?? $_GET[$name] ?? ''; }
+}
+if (!function_exists('get_request_var')) {
+    function get_request_var($name) { return $_POST[$name] ?? $_GET[$name] ?? ''; }
+}
+if (!function_exists('__')) { function __($str, $domain) { return $str; } }
+if (!function_exists('cacti_log')) { function cacti_log($msg, $stderr, $fac) {} }
+
+require_once __DIR__ . '/../../functions.php';
+
+test('syslog_get_import_xml_payload loads from text area', function () {
+    $_POST['import_text'] = '<xml>test</xml>';
+    $payload = syslog_get_import_xml_payload('http://localhost');
+    expect($payload)->toBe('<xml>test</xml>');
+});