Add unit tests for BackupManager and UpdateExecutor

Tests cover:
- BackupManager: backup directory, listing, details parsing
- UpdateExecutor: lock/unlock, maintenance mode, validation, progress

tests/Services/System/BackupManagerTest.php

@@ -0,0 +1,102 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2024 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Tests\Services\System;
+
+use App\Services\System\BackupManager;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+class BackupManagerTest extends KernelTestCase
+{
+    private ?BackupManager $backupManager = null;
+
+    protected function setUp(): void
+    {
+        self::bootKernel();
+        $this->backupManager = self::getContainer()->get(BackupManager::class);
+    }
+
+    public function testGetBackupDir(): void
+    {
+        $backupDir = $this->backupManager->getBackupDir();
+
+        // Should end with var/backups
+        $this->assertStringEndsWith('var/backups', $backupDir);
+    }
+
+    public function testGetBackupsReturnsEmptyArrayWhenNoBackups(): void
+    {
+        // If there are no backups (or the directory doesn't exist), should return empty array
+        $backups = $this->backupManager->getBackups();
+
+        $this->assertIsArray($backups);
+    }
+
+    public function testGetBackupDetailsReturnsNullForNonExistentFile(): void
+    {
+        $details = $this->backupManager->getBackupDetails('non-existent-backup.zip');
+
+        $this->assertNull($details);
+    }
+
+    public function testGetBackupDetailsReturnsNullForNonZipFile(): void
+    {
+        $details = $this->backupManager->getBackupDetails('not-a-zip.txt');
+
+        $this->assertNull($details);
+    }
+
+    /**
+     * Test that version parsing from filename works correctly.
+     * This tests the regex pattern used in getBackupDetails.
+     */
+    public function testVersionParsingFromFilename(): void
+    {
+        // Test the regex pattern directly
+        $filename = 'pre-update-v2.5.1-to-v2.6.0-2024-01-30-185400.zip';
+        $matches = [];
+
+        $result = preg_match('/pre-update-v([\d.]+)-to-v?([\d.]+)-/', $filename, $matches);
+
+        $this->assertEquals(1, $result);
+        $this->assertEquals('2.5.1', $matches[1]);
+        $this->assertEquals('2.6.0', $matches[2]);
+    }
+
+    /**
+     * Test version parsing with different filename formats.
+     */
+    public function testVersionParsingVariants(): void
+    {
+        // Without 'v' prefix on target version
+        $filename1 = 'pre-update-v1.0.0-to-2.0.0-2024-01-30-185400.zip';
+        preg_match('/pre-update-v([\d.]+)-to-v?([\d.]+)-/', $filename1, $matches1);
+        $this->assertEquals('1.0.0', $matches1[1]);
+        $this->assertEquals('2.0.0', $matches1[2]);
+
+        // With 'v' prefix on target version
+        $filename2 = 'pre-update-v1.0.0-to-v2.0.0-2024-01-30-185400.zip';
+        preg_match('/pre-update-v([\d.]+)-to-v?([\d.]+)-/', $filename2, $matches2);
+        $this->assertEquals('1.0.0', $matches2[1]);
+        $this->assertEquals('2.0.0', $matches2[2]);
+    }
+}