Unit test Case using apache cxf webclient throwing nullpointer exception

I am using Apache-CXF-2.2.7 for rest services with spring 2.5 , Rest services working fine when I test them using postman , but not when I hit them using Webclient for unit testing ,it throws null pointer exception for spring beans which is autowired in rest service implementation. here is my code.

package com.mfg.qualityTest;
import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import junit.framework.Assert;

import org.apache.cxf.endpoint.Server;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
import org.apache.cxf.jaxrs.client.WebClient;
import org.codehaus.jackson.jaxrs.JacksonJsonProvider;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.test.context.TestExecutionListeners;
import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;

import com.mfg.quality.qualityService.RestQualityService;
import com.mfg.quality.qualityServiceImpl.RestQualityServiceImpl;
@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class})
public class JAXRSTest extends AbstractApiTest {

private final static String ENDPOINT_ADDRESS = "http://localhost/quality-svc/api/v1/";
private final static String WADL_ADDRESS = ENDPOINT_ADDRESS + "?_wadl&_type=xml";
private static Server server;

@BeforeClass
public static void initialize() throws Exception {
     startServer();
     waitForWADL();
}

private static void startServer() throws Exception {
     JAXRSServerFactoryBean sf = new JAXRSServerFactoryBean();
     sf.setResourceClasses(RestQualityServiceImpl.class);
     List<Object> providers = new ArrayList<Object>();
     providers.add(new JacksonJsonProvider());
     RestQualityService rs = new RestQualityServiceImpl();
     // add custom providers if any
     sf.setProviders(providers);
     sf.setServiceBeans(rs);   
     sf.setAddress(ENDPOINT_ADDRESS);

     server = sf.create();
}

// Optional step - may be needed to ensure that by the time individual
// tests start running the endpoint has been fully initialized
private static void waitForWADL() throws Exception {
    WebClient client = WebClient.create(WADL_ADDRESS);
    // wait for 20 secs or so
    for (int i = 0; i < 20; i++) {
        Thread.currentThread();
        Thread.sleep(1000);
        Response response = client.get();
        if (response.getStatus() == 200) {
            break;
        }
    }
    // no WADL is available yet - throw an exception or give tests a chance to run anyway
}


@AfterClass
public static void destroy() throws Exception {
   server.stop();
}

@Test
public void testGetBookWithWebClient() {
 WebClient client = WebClient.create(ENDPOINT_ADDRESS);
 client.accept(MediaType.APPLICATION_JSON);
 client.path("/quality/50");
 client.type(MediaType.APPLICATION_JSON);
 client.encoding( "UTF-8" );
 client.header( "token","038c43b41ca247a29c5b87a1e8c64d21");   
 Response response = client.get();
 if(response.getStatus()!=200){

     throw new RuntimeException("HTTP Error: "+ response.getStatus());

 }
    Assert.assertTrue(response.getStatus() == 200);

}
}

Rest service methods is

 @Override
   public Response getQuality( Long qualId ) throws Exception
   {

      log.info( "============================================> Get Quality by Id" );
      Map< String, Object > errors = new HashMap< String, Object >();
      Contact contact = userDetailsService.getContact();
     -------------------
     -------------------------------------------
}

Exception throws at

Contact contact = userDetailsService.getContact();

userDetailsService is coming Null and throwing NullPointer exception while testing with postman userDetailsService is injecting properly and working fine . Please help me on this.