为什么没有输出任何东西

@Test
public void testResetMetData() throws Exception{
Connection conn=null;
PreparedStatement preparedStatement=null;
ResultSet rs=null;

    try {
        String sql="select id stu_id,idCard stu_idcard,examCard stu_examcard,score stu_score "
                +"from examstudent where id=?";
        conn=JDBCTools.getConnection();
        preparedStatement=conn.prepareStatement(sql);

        preparedStatement.setInt(1,4);

        rs=preparedStatement.executeQuery();

        Map<String,Object> values=new HashMap<String,Object>();



        ResultSetMetaData rsmd=rs.getMetaData();
        while(rs.next()){
            for(int i=0;i<rsmd.getColumnCount();i++){
                String columnLabel=rsmd.getColumnLabel(i+1);
                System.out.println(columnLabel);
            }
        }
        //打印列名
        //System.out.println(values);

        Class clazz=Student.class;

        Object object=clazz.newInstance();
        for(Map.Entry<String, Object> entry:values.entrySet()){
            String fieldName=entry.getKey();
            Object fieldValue=entry.getValue();

            System.out.println(fieldName+":"+fieldValue);
        }


    } catch (SQLException e) {
        e.printStackTrace();
    }finally{
        JDBCTools.releaseDB(rs, preparedStatement, conn);
    }
}

这是Junit单元测试吧，那么有没有异常信息呢，测试结果为红杠还是绿杠呢？

什么都没有看下有没报错，，