public void mongo_batch_test()
        {
            var customerRepo = new MongoTestDB <Customer>();

            var custlist = new List <Customer>(new Customer[] {
                new Customer()
                {
                    FirstName = "Customer A"
                },
                new Customer()
                {
                    FirstName = "Client B"
                },
                new Customer()
                {
                    FirstName = "Customer C"
                },
                new Customer()
                {
                    FirstName = "Client D"
                },
                new Customer()
                {
                    FirstName = "Customer E"
                },
                new Customer()
                {
                    FirstName = "Client F"
                },
                new Customer()
                {
                    FirstName = "Customer G"
                },
            });

            //Insert batch
            customerRepo.Insert(custlist);
            var count = customerRepo.GetAll().Count();

            count.Should().Be(7);

            foreach (Customer c in custlist)
            {
                c.Id.Should().NotBe(new string('0', 24));
            }

            //Update batch
            foreach (Customer c in custlist)
            {
                c.LastName = c.FirstName;
            }
            customerRepo.Update(custlist);

            var updateList = customerRepo.GetAll();

            foreach (Customer c in updateList)
            {
                c.LastName.Should().Be(c.FirstName);
            }

            //Delete by criteria
            customerRepo.Delete(f => f.FirstName.StartsWith("Client"));

            count = customerRepo.GetAll().Count();
            count.Should().Be(4);

            //Delete specific object
            customerRepo.Delete(custlist[0]);

            //Test AsQueryable
            var selectedcustomers = customerRepo.GetBy(
                cust => cust.LastName.EndsWith("C") || cust.LastName.EndsWith("G"));

            selectedcustomers.ToList().Count.Should().Be(2);

            count = customerRepo.GetAll().Count();
            count.Should().Be(3);
        }