test: added tests

src/Service/PrinterService.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Service;
+
+use App\Entity\Printer;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Mapping\Entity;
+
+class PrinterService
+{
+    public function __construct(private readonly EntityManagerInterface $entityManager)
+    {
+    }
+
+    public function deletePrinter(Printer $printer)
+    {
+        $this->entityManager->remove($printer);
+        $this->entityManager->flush();
+    }
+}