What is Subsytem Testing for software testing

manpreet Best Answer 2 years ago

What exactly is Subsystem testing">testing and is it any different from Integration Testing? Is subsystem testing">testing just testing">testing that the methods work when the parameters are passed to them?

What would be a good subsystem test for this code

package server.controller;
import server.storage.ParkedUsers;
import java.net.ServerSocket;
import java.net.Socket;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;
import server.storage.ParkingSpot;

/**
 * This is the server class that controls all data access and flow.
 * It is also responsible of creating all the parking user objects
 * once it searches them in the FIU Database.
 */
public class AccessControlServer extends Thread
{
    private static ParkedUsers garage = ParkedUsers.instance("garage.txt");
    private final int portNum;
    private PrintWriter sout = null;
    private HashMap displayConnections 
                                    = new HashMap();

    /**
     * constructor that initializes the port number variable
     * @param p integer that contains the port number 
     * to which this server will listen to
     */
    public AccessControlServer(int p)
    {
        portNum = p;
        mapConnections();
    }
    /**
     * helper method that maps the text file into the hashmap
     */
    private void mapConnections()
    {

        sout = null;
        displayConnections.put("security", sout);
        for(TreeSet t: garage.values())
            for(ParkingSpot p: t)
            {
                displayConnections.put(p.getParkingNumber(), 
                        p.getPrintWriter());
            }
    }

    @Override
    public void run()
    {
        try
        {
            startServer();
        }
        catch(IOException e)
        {
            System.out.println("Can't listen on port " + portNum);
        }
    }

    /**
     * initializes the server with the specified port number and 
     * starts listening for connections
     * @throws IOException exception thrown if there is a problem 
     * with the server
     */
    public void startServer() throws IOException
    {
        ServerSocket ss = new ServerSocket(portNum);
        while(true)
        {
            Socket s = ss.accept();
            Thread t = new Thread(new ConnectionHandler(s));
            t.start();
        }
    }    

    /**
     * method to send a message to a client
     * @param msg sends a string message to the specified client
     * @param pout the print writer connection to the client
     */
    public void sendMessage(String msg, PrintWriter pout)
    {        
        pout.println(msg);
    }

    /**
     * send the security display the status of all the parking spots
     */
    public void sendStatus()