public void AddPackageTest()
        {
            int userID  = 1;
            int barcode = packageService.AddPackage(testPack, userID);
            var pack    = packageDao.Packages.SingleOrDefault(Package => Package.Barcode == barcode);
            int result  = pack.Barcode;

            packageDao.Packages.Remove(pack);
            packageDao.SaveChanges();
            Assert.AreEqual(barcode, result);
        }