2 Why We Need Model-Based Testing

Overview 19
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading; // Thread.Sleep
namespace ClientServerImpl
{
// Wrapper for .NET client socket
}
public class Client
{
Socket socket;
}
const int BUFLEN = 4;
byte[] receiveBuf = new byte[BUFLEN];
// method Client.Socket assigns instance of System.Net.Sockets.Socket
public void Socket()
{
socket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
}
public void Connect(string ipAddr, int port)
{
socket.Connect(new IPEndPoint(IPAddress.Parse(ipAddr), port));
}
public void Send(string command)
{
byte [] sendBuf = System.Text.Encoding.ASCII.GetBytes(command);
socket.Send(sendBuf);
}
public double Receive()
{
int nbytes = socket.Receive(receiveBuf);
string response =
System.Text.Encoding.ASCII.GetString(receiveBuf,0,nbytes);
return Double.Parse(response);
}
public void Close()
{
socket.Close();
}
public void Sleep(int seconds)
{
Thread.Sleep(1000*seconds); // convert seconds to milliseconds
}
Figure 2.5. Remote instrument client class.
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