我在应用程序中使用RestTemplate的exchange（）调用外部API。目前，我正在为restTemplate调用编写junit和mockito测试用例，但我遇到了参数不匹配异常。
这是我的代码

@Service
public class ApiService {

  @Autowired
  private RestTemplate restTemplate;
  
  @Value("{url}")
  private String url;
  
  public TrackResponse getTpiValue(TrackRequest trackRequest){
  
    TrackResponse trackResponse = null;
    
    HttpHeaders headers = new HttpHeaders();
    
    HttpEntity<TrackRequest> entity = new HttpEntity<TrackRequest>(trackRequest, headers);
    
    ResponseEntity<TrackResponse> response = restTemplate.exchange(url, HttpMethod.Post, entity, TrackResponse.class);
    
    if(response.getStatusCode == HttpStatus.ok){
       trackResponse = response.getBody();
    }
  return trackResponse;
  }

}

这是我的测试案例

@TestInstance(Lifecycle.PER_CLASS)
@ExtendWith(MocikotExtension.class)
public class ApiServiceTest {

  @Mock
  private RestTemplate restTemplate;
  
  @InjectMocks
  private ApiService apiService;
    
  public void getTpiValueTest(){
  
    TrackRequest trackRequest = new TrackRequest();
    trackRequest.setId("UTHL10");
    
    TrackResponse trackResponse = new TrackResponse();
    trackResponse.setTrackId("QWEDRTHFDS");
    
    ResponseEntity<TrackResponse> response = new ResponseEntity<>(trackResponse, HttpStatus.ok);
    
    when(restTemplate.exchange(eq(null), eq(HttpMethod.Post), any(HttpEntity.class), eq(TrackResponse.class))).thenReturn(response);
    
    TrackResponse finalResponse = apiService.getTpiValue(trackRequest);
    
    assetEquals(response.getbody(), finalResponse.getTrackId());
  }

}

但是当我运行测试用例时，我得到的错误低于

org.mockito.exceptions.misusing.PotentialStubbingProblem: 
Strict stubbing argument mismatch. Please check:
 - this invocation of 'exchange' method:
    restTemplate.exchange(
    null,
    POST,
    <com.application.track.TrackRequest@3c486eb1,[]>,
    class com.application.track.TrackResponse
);
    -> at com.application.track.ApiService.getTpiValue(ApiService.java:18)
 - has following stubbing(s) with different arguments:
    1. restTemplate.exchange(
    null,
    null,
    null,
    null
);
-> at com.application.track.ApiServiceTest.getTpiValueTest(ApiServiceTest.java:21)

我也试过使用lenient（），但它不起作用。