我需要在Java类中模拟这样的方法：

public class Helper{

    public static message(final String serviceUrl){   

        HttpClient httpclient = new HttpClient();
        HttpMethod httpmethod = new HttpMethod();

        // the below is the line that iam trying to mock
        String code = httpClient.executeMethod(method);

    }
}

我尝试用groovy编写junit,但由于grovy元编程技术不适用于Java类,因此无法这样做.在我的研究中,我发现JMockit是一个很好的框架,它还可以模拟使用新构造函数创建的对象.

有人可以告诉我如何用Java或groovy编写上述类的单元测试.

先进的谢谢

这是我到目前为止使用jmockit尝试过的测试用例,但是不起作用.

void testSend(){

    def serviceUrl = properties.getProperty("PROP").toString()

    new Expectations(){
        {
            HttpClient httpClient=new HttpClient();
            httpClient.executeMethod(); returns null;
        }        
    };
    def responseXml = Helper.sendMessage(requestXml.toString(), serviceUrl)            
}

解决方法:

使用jmockit,您还可以模拟实例创建.我喜欢稍微不同的技术：

@Test    
public void testFoo(@Mocked final HttpClient client) {
       new Expectations() {{
              // expect instance creation and return mocked one
              new HttpClient(... );  returns(client)

              // expect invocations on this mocked instance
             client.invokeSomeMethid(); returns(something)
       }};


        helper.message(serviceUrl)
}