public void Update_Order()
        {
            // Arrange
            var orderDataService = new OrderDataService(sourceService.Object, iLoggerFactory.Object.CreateLogger <OrderDataService>());
            var requestOrder     = new Order()
            {
                Id          = 1,
                Amount      = 29.99M,
                DateCreated = DateTime.UtcNow
            };
            var itms = new List <DbOrder>()
            {
                requestOrder.OrderToDbOrder()
            };

            var ordersMock = TestHelper.ToDbSetMock(itms);

            ordersMock.Setup(d => d.UpdateRange(It.IsAny <DbOrder[]>())).Callback <DbOrder[]>((s) => {
                s.ToList().ForEach(fe => {
                    var fod = itms.FirstOrDefault(v => v.Id == fe.Id);
                    if (fod != null)
                    {
                        fod.DateCreated = fe.DateCreated;
                        fod.Amount      = fe.Amount;
                    }
                });
            });
            sourceService.Setup(x => x.Orders).Returns(ordersMock.Object);
            sourceService.Setup(x => x.Set <DbOrder>()).Returns(ordersMock.Object);

            var ord = new Order()
            {
                Id          = 1,
                Amount      = 77.77M,
                DateCreated = DateTime.UtcNow.AddDays(15)
            }.OrderToDbOrder();

            var badOrder = new Order()
            {
                Id          = Int32.MaxValue,
                Amount      = 1.1M,
                DateCreated = DateTime.UtcNow.AddDays(30)
            }.OrderToDbOrder();

            // Action
            orderDataService.Update(ord);
            orderDataService.Update(badOrder);

            // Assert
            ordersMock.Verify(x => x.UpdateRange(It.IsAny <DbOrder[]>()), Times.Exactly(2));
            Assert.AreEqual(1, itms.Count);
            var updatedItem = itms.First();

            Assert.AreEqual(ord.Amount, updatedItem.Amount);
            Assert.AreEqual(ord.DateCreated, updatedItem.DateCreated);
        }