如何模拟 RestTemplate Exchange spring 启动

How to mock a RestTemplate Exchange spring boot

我已经尝试了很多方法来模拟 restTemplate 交换,但模拟没有发生,实际交换一直在调用并给我 url 无效异常。

我的 CallRestService 方法如下

public class Util{
    
    public static ResponseEntity<String> callRestService(JSONObject reqJsonObj,HttpHeaders headers, String url, HttpMethod method, boolean isAuto){
        ResponseEntity<String> re=null;
        try{
            HttpEntity<String> entity=null;
            entity=new HttpEntity<>(String.valueOf(reqJsonObj),headers);
            RestTemplate restTemplate= new RestTemplate();
            re=restTemplate.exchange(url,method,entity,String.class);
        }catch(Exception e){
            System.out.println(e);
        }
    }
}

下面是我的模拟:

public class UtilTest{
    @InjectMocks
    Util util;
    @Mock
    RestTemplate restTemplate;
    ResponseEntity res=mock(ResponseEntity.class);

    @Test
    public void test(){
        //ResponseEntity<String> entity=new ResponseEntity<String>("anySt",HttpStatus.ACCEPTED);
        Mockito.when(restTemplate.exchange(
                ArgumentMatchers.anyString(),
                ArgumentMatchers.any(HttpMethod.class),
                ArgumentMatchers.any(HttpEntity.class),
                ArgumentMatchers.<Class<String>>any())
        ).thenReturn(res);
        Util.callRestService(json,headers,url,HttpMethod.POST,false);
    }
}

我也尝试 return 评论响应实体。但总是有例外作为交换。

我对 mocking 的理解是不会调用实际的交换方法,那么我如何获得 resttemplate 交换异常。

如果需要任何输入,请发表评论。

感谢支持

UPDATE: I tried with changing the static method to non static but kept the test case as is. But i get the same error

当我将方法更新为非静态并将 Resttemplate 声明移到方法外部时,问题得到解决。

更新后的代码如下,如果有人觉得有用的话。

方法变更:

public class Util{
    private RestTemplate restTemplate= new RestTemplate();
    public ResponseEntity<String> callRestService(JSONObject reqJsonObj,HttpHeaders headers, String url, HttpMethod method, boolean isAuto){
        ResponseEntity<String> re=null;
        try{
            HttpEntity<String> entity=null;
            entity=new HttpEntity<>(String.valueOf(reqJsonObj),headers);
            re=restTemplate.exchange(url,method,entity,String.class);
        }catch(Exception e){
            System.out.println(e);
        }
    }
}

和带有验证的模拟:

public class UtilTest{
    @InjectMocks
    Util util;
    @Mock
    RestTemplate restTemplate;

    @Test
    public void test(){
        ResponseEntity<String> entity=new ResponseEntity<String>("anySt",HttpStatus.ACCEPTED);
        Mockito.when(restTemplate.exchange(
                ArgumentMatchers.anyString(),
                ArgumentMatchers.any(HttpMethod.class),
                ArgumentMatchers.any(HttpEntity.class),
                ArgumentMatchers.<Class<String>>any())
        ).thenReturn(entity);

        Util.callRestService(json,headers,url,HttpMethod.POST,false);

        Mockito.verify(restTemplate,times(1)).exchange(
                ArgumentMatchers.anyString(),
                ArgumentMatchers.any(HttpMethod.class),
                ArgumentMatchers.any(HttpEntity.class),
                ArgumentMatchers.<Class<String>>any())
        )
    }
}