public virtual void GetTests()
        {
            //
            // Test missing element
            //
            entityRepo.TruncateCollection();

            Exception e = null;

            try
            {
                entityRepo.GetById("unknown_id");
            }
            catch (Exception ex)
            {
                e = ex;
            }

            Assert.IsInstanceOfType(e, typeof(KeyNotFoundNoSQLException), "Getbyid sould raise IdNotFoundException for missing ids");
            //
            // Test GetByIds
            //

            // Init test
            var entity1 = TestHelper.GetEntity1();
            var entity2 = TestHelper.GetEntity2();

            entityRepo.InsertOne(entity1);
            entityRepo.InsertOne(entity2);

            List <string> ids = new List <string>()
            {
                entity1.Id, entity2.Id, "unknown_id"
            };
            var results = entityRepo.GetByIds(ids);

            Assert.AreEqual(2, results.Count(), "GetByIds should return 2 entities");
            Assert.IsTrue(results.Any(i => i.Name.Equals("Balan")));
            Assert.IsTrue(results.Any(i => i.Name.Equals("Mack")));
        }