signallamp_nointerface.java

软件测试和junit实践一书的源代码

/*
 * LampTestCase_NoInterFace.java
 *
 * Created on 2003年5月8日, 下午9:01
 */

package com.fastpoint.book;

/**
 *
 * @author  Fastpoint
 */
public abstract class SignalLamp_NoInterFace implements Lamp{
    
    private String _stat;
    
    /** Creates a new instance of SignalLamp */
    public SignalLamp_NoInterFace(String stat){
       _stat = stat;
    }
    
    public SignalLamp_NoInterFace(){
       _stat = SignalLamp.GREEN;
    }
    
    public void setState(String stat){
       _stat = stat;
    }
    
    public String getState(){
       return _stat;
    }
    
    public void changeStat(Lamp lamp){
        if (this.getState().equals(lamp.getState())){
           if( lamp.getState().equals(SignalLamp.RED)){
               lamp.setState(SignalLamp.GREEN);
           }else if(lamp.getState().equals(SignalLamp.GREEN)){
               lamp.setState(SignalLamp.RED);
           }
        }
    }
    
    public void isVaildate() throws Exception{
        if ( _stat.length() == 0)
             throw new Exception("State is Null");
        if( _stat != SignalLamp.GREEN && _stat != SignalLamp.RED)
             throw new Exception("State not SignalLamp.GREEN or SignalLamp.RED");
    }
}