在Junit中测试私有函数的方法

public class Summer{
   private int methodone(String argsone){
      //method code

      .......
      return 4;
   }
}

测试如下：
public class SummerTest extends TestCase {
   public void testMethodone(){
      Object rightResult = xxxxx;
      Summer example = new Summer.newInstance();
      Method m = example .getClass().getDeclaredMethod("methodone",new Class[]{String.class});
      m.setAccessible(true);
      Object result = m.invoke(example ,new Object[] {new String(xxxx)});
      m.setAccessible(false);
      if (result.equals(rightResult)){
         //your code

         ......
      }
   }
}