Fixed sorting for element choice type and added tests

tests/Repository/AttachmentContainingDBElementRepositoryTest.php

@@ -0,0 +1,56 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 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/>.
+ */
+
+namespace App\Tests\Repository;
+
+use App\Entity\Parts\Category;
+use App\Repository\AttachmentContainingDBElementRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use PHPUnit\Framework\TestCase;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+class AttachmentContainingDBElementRepositoryTest extends KernelTestCase
+{
+
+    private EntityManagerInterface $entityManager;
+
+    protected function setUp(): void
+    {
+        $kernel = self::bootKernel();
+
+        $this->entityManager = $kernel->getContainer()
+            ->get('doctrine')->getManager();
+    }
+
+
+    public function testGetElementsAndPreviewAttachmentByIDs(): void
+    {
+        $repo = $this->entityManager->getRepository(Category::class);
+
+        $elements = $repo->getElementsAndPreviewAttachmentByIDs([2, 1, 5, 3]);
+
+        //Elements are ordered the same way as the ID array
+        $this->assertCount(4, $elements);
+        $this->assertSame(2, $elements[0]->getId());
+        $this->assertSame(1, $elements[1]->getId());
+        $this->assertSame(5, $elements[2]->getId());
+        $this->assertSame(3, $elements[3]->getId());
+    }
+}