public void Test()
{
Trace.WriteLine("Process via whole CoR");
// 生成并组装链式的结构 internal-> discount-> mail-> regular-> null
var head = new InternalHandler()
{
Successor = new DiscountHandler()
{
Successor = new MailHandler()
{
Successor = new RegularHandler()
}
}
};
var request = new Request()
{
Price = 20, Type = PurchaseType.Mail
};
head.HandleRequest(request);
Assert.AreEqual <double>(20 * 1.3, request.Price);
request = new Request()
{
Price = 20, Type = PurchaseType.Discount
};
head.HandleRequest(request);
Assert.AreEqual <double>(20 * 0.9, request.Price);
Trace.WriteLine("\n\nProcess via rearranged CoR");
// 重新组织链表结构， 新链表为internal-> mail-> regular-> null
// 此时，head指向internal
var discountHandler = head.Successor;
head.Successor = head.Successor.Successor; // 短路掉Discount Handler
discountHandler = null;
request = new Request()
{
Price = 20, Type = PurchaseType.Discount
};
head.HandleRequest(request);
// 价格没有折扣打折，确认被短路的部分无法生效
// 验证CoR可以通过动态维护链表调整处理对象（Handler）的组织结构
Assert.AreEqual <double>(20, request.Price);
}
public void Test()
{
var head = new InternalHandler
{
Successor = new DiscountHandler
{
Successor = new MailHandler
{
Successor = new RegularHandler()
}
}
};
var request = new Request
{
Price = 20, Type = PurchaseType.Mail
};
head.HandleRequest(request);
Assert.AreEqual(20 * 1.3, request.Price);
request = null;
//重新组织链表结构
//此时,head指向internal
var discountHandler = head.Successor;
//短路掉Discount Handler
head.Successor = head.Successor.Successor;
discountHandler = null;
request = new Request
{
Price = 20, Type = PurchaseType.Discount
};
head.HandleRequest(request);
//价格没有折扣打折,确认被短路的部分无法生效
//验证CoR可以通过动态维护链表调整操作对象(Handler)的组织结构
Assert.AreEqual(20, request.Price);
}
public void Test()
{
Trace.WriteLine("Process via whole CoR");
// 生成并组装链式的结构 internal->discount->mail->regular->null
var head = new InternalHandler()
{
Successor = new DiscountHandler()
{
Successor = new MailHandler()
{
Successor = new RegularHandler()
}
}
};
var request = new Request {
Price = 20, Type = PurchaseType.Mail
};
head.HandleRequest(request);
Assert.AreEqual <double>(20 * 1.3, request.Price);
request = new Request()
{
Price = 20, Type = PurchaseType.Discount
};
head.HandleRequest(request);
Assert.AreEqual <double>(20 * 0.9, request.Price);
Trace.WriteLine("\n\nProcess via rearranged CoR");
var discountHandler = head.Successor;
head.Successor = head.Successor.Successor;
discountHandler = null;
request = new Request()
{
Price = 20, Type = PurchaseType.Discount
};
head.HandleRequest(request);
Assert.AreEqual <double>(20, request.Price);
}