測試DatagramSockets的傳輸

Question

我想測試我的程序，該程序在發件人和接收器類之間發送DatagramSocket數據。我應該如何去測試這些類之間的數據發送？

這裏是我的發送方碼...

public class CheckIn { 

    private String patientName; 
    private String pTime; 
    private int portnumber; 

    public CheckIn(String pname, String time, int port){ 
     patientName = pname; 
     pTime = time; 
     portnumber = port; 
     process(); 
    } 

    public void process() { 
     try { 
      DatagramSocket is = new DatagramSocket(5800,InetAddress.getLocalHost()); 
      ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
      ObjectOutputStream oos = new ObjectOutputStream(baos); 
      String n = "Your "+"\n" + pTime + "\n" + patientName + " has arrived"; 
      oos.writeObject(n); 
      byte[] buffer = baos.toByteArray(); 
      baos.close(); 
      oos.close(); 
      DatagramPacket packet = new DatagramPacket(buffer, buffer.length,InetAddress.getLocalHost(), portnumber); 
      is.send(packet); 

      System.out.println("patient name " + patientName); 
      System.out.println("Check In"); 
     } 
     catch (Exception e){ 
      System.out.println("ERROR Cashier: " + e.getMessage()); 
      e.printStackTrace(); 
     } 
    } 
} 

這是我Receiver類...

class Reciever2 extends Thread { 
    public Reciever2(){ 
     this.start(); //starts the thread 
    } 

    public void run(){ 
     try { 
      DatagramSocket socket = new DatagramSocket(5700,InetAddress.getLocalHost()); 
      System.out.println("Recieving"); //prints when receiving a message 

      while (true){ 
       byte[] data = new byte[1024]; //array of bytes 
       DatagramPacket packet = new DatagramPacket(data,data.length); 
       socket.receive(packet);  //receives the packet 
       ByteArrayInputStream bais = new ByteArrayInputStream(packet.getData()); 
       ObjectInputStream ois = new ObjectInputStream(bais); 
       String s = (String) ois.readObject(); //reading the data 
       bais.close(); //closes input stream 
       ois.close(); //closes input stream 

       System.out.println(s); 
       theText.setText(s); //displays message 
      } 
     } 
     catch (Exception e){ 
      System.out.println("ERROR Cook: " + e.getMessage()); 
      } 
     } 
    } 

Answer 1

你可能需要編寫測試對接收器類，或有訪問目標服務器，以便觀察更改。 UDP協議幾乎是單向協議。

本指南對了解更多關於DatagramSockets的信息可能會有幫助 - 它還有一個關於編寫發件人和接收者的章節。 http://docs.oracle.com/javase/tutorial/networking/datagrams/index.html

Answer 2

你可以使用一種叫做Mocking的技巧。 有關更多信息，請參閱What's the best mock framework for Java?。