运行test类出现java.lang.Exception:No runnable method;

import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import studentDAO.Student;



public class StudentTest {
    private SessionFactory sessionFactory;
    private org.hibernate.Session session;
    private Transaction transaction;    
    
    @Before
    public void init(){
        Configuration config = new Configuration().configure();//config为配置对象
        sessionFactory = config.buildSessionFactory();//创建会话工厂
        session =  sessionFactory.openSession();
        transaction = session.beginTransaction();//事物
    }
    
    @After
    public void destroy(){
        transaction.commit();//提交事物
        session.close();//关闭会话
        sessionFactory.close();//关闭工厂
    }
    
    @Test
    public void testSaveStudent(){
        Student student = new Student(1, "张三", "男", new Date(), "喜马拉雅");
        session.save(student);
    }    
}