public void TestDeleteDisks()
 {
     using (var persistence = GetPersistence())
     {
         var user = persistence.CreateUser(_userDto.Login, _userDto.HashedPassword);
         var disk = persistence.CreateDisk(user, new DiskOptionsDto());
         var s = new DiskServiceImpl(persistence);
         Assert.IsTrue(s.DeleteDisk(user, disk));
         Assert.AreEqual(0, s.Disks(user).Count);
     }
 }