public void TestSalesDataManagerRetrieveAllTotalSalesData()
        {
            // arrange
            List <SalesDataVM> salesData;
            ISalesDataManager  salesDataManager = new SalesDataManager(_salesDataAccessor);

            // act
            salesData = salesDataManager.RetrieveAllTotalSalesData();

            //assert
            Assert.AreEqual(1, salesData.Count);
        }
        public void TestSalesDataManagerRetrieveAllEmployeeSalesData()
        {
            // arrange
            int employeeID = 6547898;
            List <SalesDataVM> salesData;
            ISalesDataManager  salesDataManager = new SalesDataManager(_salesDataAccessor);

            // act
            salesData = salesDataManager.RetrieveAllEmployeeSalesData(employeeID);

            //assert
            Assert.AreEqual(1, salesData.Count);
        }