Guys, I am getting this error when i tries to run a test on my project. The project is working fine, but the test for an authentication class fails.

This is the error I am getting:
Java Code: 
junit.framework.AssertionFailedError: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
	at junit.framework.Assert.fail(Assert.java:47)
	at manager.LoginMgrTest.testValidLogin(LoginMgrTest.java:21)
this is my test class

Java Code: 
package manager;

import junit.framework.TestCase;

import domain.*;

public class LoginMgrTest extends TestCase {

	public void testValidLogin() throws Exception {

		System.out.println("starting testValidLogin()");
		LoginBean login = new LoginBean();
		login.setUsername("john");
		login.setPassword("smith");
		
		try{
		CustomerBean cust = (new LoginMgr()).authenticate(login);
		assertNotNull("authenticate Failed", cust);
		}catch (Exception e) {

			fail(e.getMessage());

			e.printStackTrace();

			}
		System.out.println("testValidLogin PASSED");

	}
}
the test worked fine last week and then I implemented a factory for creating services and stuff, now the test has to go get the particular services from the factory and return it to run the test. But as i said, the project is working fine(getting service from factory is ok for the project but not for the test).

this is my xml file:

Java Code: 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>myPrice</display-name>
  <welcome-file-list>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
     <welcome-file>login.html</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>LoginCtrl</display-name>
    <servlet-name>LoginCtrl</servlet-name>
    <servlet-class>controller.LoginCtrl</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginCtrl</servlet-name>
    <url-pattern>/login</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>SearchCtrl</display-name>
    <servlet-name>SearchCtrl</servlet-name>
    <servlet-class>controller.SearchCtrl</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>SearchCtrl</servlet-name>
    <url-pattern>/send</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>ErrorCtrl</display-name>
    <servlet-name>ErrorCtrl</servlet-name>
    <servlet-class>controller.ErrorCtrl</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ErrorCtrl</servlet-name>
    <url-pattern>/error</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>LoginMgr</display-name>
    <servlet-name>LoginMgr</servlet-name>
    <servlet-class>manager.LoginMgr</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginMgr</servlet-name>
    <url-pattern>/LoginMgr</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>HomeCtrl</display-name>
    <servlet-name>HomeCtrl</servlet-name>
    <servlet-class>controller.HomeCtrl</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>HomeCtrl</servlet-name>
    <url-pattern>/home</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>DisplayCtrl</display-name>
    <servlet-name>DisplayCtrl</servlet-name>
    <servlet-class>controller.DisplayCtrl</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DisplayCtrl</servlet-name>
    <url-pattern>/display</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>ErrorDisplay</display-name>
    <servlet-name>ErrorDisplay</servlet-name>
    <servlet-class>controller.ErrorDisplay</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ErrorDisplay</servlet-name>
    <url-pattern>/errordisplay</url-pattern>
  </servlet-mapping>
  <env-entry>
  <env-entry-name>ICustomerSvc</env-entry-name>
  <env-entry-type>java.lang.String</env-entry-type>
  <env-entry-value>service.CustomerServiceImpl</env-entry-value>  
  </env-entry>  
</web-app>
whats wrong with it? do i need to add something to xml file???
Also I checked the logger and found out that the factory has an implementation method and its not returning anything back to the factory.

this is my factory code:

Java Code: 
package service;
import javax.naming.Context;
import org.apache.log4j.*;

import javax.naming.InitialContext;

import org.apache.log4j.*;

import controller.LoginCtrl;
import exception.*;

public class Factory {
	
	private static Logger logger = Logger.getLogger(Factory.class);
	
    private Factory() {
    }
    private static Factory factory = new Factory();
    

    public static Factory getInstance() {
        return factory;
    }

    public IService getService(String serviceName) throws Exception {
        logger.info("Getting service from factory now");
        try {
            @SuppressWarnings("rawtypes")

            Class c = Class.forName(getImplName(serviceName));
            System.out.println(" c value is" +c);
            return (IService) c.newInstance();
        } catch (ServiceLoadException e) {
            throw new ServiceLoadException(serviceName + " not loaded");
        } catch (ClassNotFoundException e) {
    		throw new ServiceLoadException(serviceName + " not found");
    	} catch (InstantiationException e) {
    		throw new ServiceLoadException(serviceName + " not instantiated");
    	} catch (IllegalAccessException e) {
    		throw new ServiceLoadException(serviceName + " illegal access");
    	}

    }
    
	private String getImplName(String serviceName) throws Exception {
		logger.info("Inside Impl method now");
	     Context iniCtx = new InitialContext();
	     Context envCtx = (Context) iniCtx.lookup("java:comp/env");
	     return (String)envCtx.lookup(serviceName);
	}



}