protected void Page_Load(object sender, EventArgs e)
{
IDatabaseV1 cust = new CustomerWithRead();
cust.Add();
cust.Read();
}
// e.g.
private void ManipulateCustomers()
{
var database = new Database();
var customer = new Customer();
customer.Add(database); // Old functionality, works fine
var readCustomer = new CustomerWithRead();
readCustomer.Read(); // Good! New functionalty is separate from existing customers
}
public void TestCustomersTest()
{
ICustomer customer = new CustomerInterface();
ICustomerV1 readCustomer = new CustomerWithRead();
Assert.IsInstanceOfType(customer, typeof(ICustomer));
Assert.IsNotInstanceOfType(customer, typeof(ICustomerV1));
Assert.IsInstanceOfType(readCustomer, typeof(ICustomer));
Assert.IsInstanceOfType(readCustomer, typeof(ICustomerV1));
}
public static void Main(string[] args)
{
List <CustomerOCP> Customers = new List <CustomerOCP>();
Customers.Add(new SilverCustomer());
Customers.Add(new GoldCustomer()); // Using OCP
Customers.Add(new Enquiry()); // Using ISP
foreach (CustomerLSP o in Customers)
{
o.Add();
}
IDatabase i = new CustomerLSP(); // 1000 happy old clients not touched
i.Add(); // using Liskov
IDatabaseV1 iv1 = new CustomerWithRead(); // new clients
iv1.Read();
}
