added unit tests

tests/Unit/SettingsTest.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit;
+
+use InvalidArgumentException;
+use Tests\Support\DatabaseSeeder;
+use Tests\Support\QdbTestCase;
+
+final class SettingsTest extends QdbTestCase
+{
+    public function testDefaults(): void
+    {
+        require_once dirname(__DIR__, 2) . '/lib/settings.php';
+        $d = qdb_settings_defaults();
+        $this->assertSame(10, $d['login_max_attempts']);
+        $this->assertSame(30 * 24 * 60 * 60, $d['session_ttl_seconds']);
+    }
+
+    public function testValidateRejectsOutOfRange(): void
+    {
+        require_once dirname(__DIR__, 2) . '/lib/settings.php';
+        $this->expectException(InvalidArgumentException::class);
+        qdb_settings_validate_and_merge(['login_max_attempts' => 0]);
+    }
+
+    public function testSaveAndLoadRoundTrip(): void
+    {
+        require_once dirname(__DIR__, 2) . '/lib/settings.php';
+        [$pdo, $tmpDb, $lockFp] = qdb_open(true);
+        $custom = qdb_settings_validate_and_merge([
+            'login_max_attempts'    => 5,
+            'login_window_seconds'  => 600,
+            'login_lockout_seconds' => 1200,
+            'session_ttl_seconds'   => 86400,
+            'temp_session_ttl_seconds' => 900,
+        ]);
+        qdb_settings_save_on_pdo($pdo, $custom);
+        qdb_save($tmpDb, $lockFp);
+        [$pdo2, $tmp2, $lock2] = qdb_open(false);
+        $loaded = qdb_settings_get_on_pdo($pdo2);
+        qdb_discard($tmp2, $lock2);
+        $this->assertSame(5, $loaded['login_max_attempts']);
+        $this->assertSame(86400, $loaded['session_ttl_seconds']);
+    }
+
+    public function testSessionTtlHelper(): void
+    {
+        require_once dirname(__DIR__, 2) . '/lib/settings.php';
+        $this->assertSame(600, qdb_session_ttl_seconds(['temp_session_ttl_seconds' => 600], true));
+        $this->assertSame(3600, qdb_session_ttl_seconds(['session_ttl_seconds' => 3600], false));
+    }
+}