public void getDiskFromDatabase()
        {
            DiskDataAccess dataAccess = new DiskDataAccess();
            ProducerDataAccess producerDataAccess = new ProducerDataAccess();
            PhysicalInterfaceDataAccess physicalInterfaceDataAccess = new PhysicalInterfaceDataAccess();
            Disk hdd = new Disk();

            hdd.Description = "Dies ist ein Test";
            hdd.Capacity = 1000;
            hdd.Ssd = false;
            hdd.Inch = 3.5;
            hdd.Producer = producerDataAccess.GetLastEntity<Producer>();
            hdd.AddPhysicalInterface(new PhysicalInterfaceWithCount(physicalInterfaceDataAccess.GetLastEntity<PhysicalInterface>(), 3));

            dataAccess.Save(hdd);
            Disk dbHDD = dataAccess.GetLastEntity<Disk>();

            Assert.AreEqual(hdd.Capacity, dbHDD.Capacity);
        }