public void PostCodeTestMidBoundary()
{
//create an instance of a class
clsCustomer AnAddress = new clsCustomer();
//Boolean variable to store the result of the validation
Boolean OK = false;
//Create some test data to pass to the method
string HouseNo = "32a";
string Street = "some street";
string Town = "Leicester";
string PostCode = "aaaa";
string DateAdded = Convert.ToString(DateTime.Now.Date);
//invoke the method
OK = AnAddress.ValidConvert(HouseNo, Street, Town, PostCode, DateAdded);
//test to see that the result is correct
Assert.IsTrue(OK);
}