//test that the StockItemDescription  validation throws an error 
        //when StockItemDescription is more than 8 characters
        public void StockItemDescriptionMaxPlusOne()
        {
            //create and instance of the class
            clsStockItem AstockItem = new clsStockItem();
            //create a varaible to record the result of the validation test
            Boolean OK;
            //create a variable to store the test data
            string SomeText = "";
            //pad the data to the required number of characters
            SomeText = SomeText.PadLeft(101);
            //test the valid method with a two character string
            OK = AstockItem.StockCodeValid(SomeText);
            //assert that the outcome should be true
            Assert.IsFalse(OK);

        }
        //used to test the presence of the valid method
        public void StockCodeMid()
        {
            //create and instance of the class
            clsStockItem AStockItem = new clsStockItem();

            Boolean OK;
            //test to see if the valid method exists
            OK = AStockItem.StockCodeValid("4");
            Assert.IsTrue(OK);
        }