restTemplate.postForEntity 的单元测试导致 ResourceAccessException

Question

我创建了一个方法，只检查端口上运行的 url 是否正常工作。

public boolean isBackendRunning() throws URISyntaxException, IOException {

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);

    HttpEntity<Object> entity = new HttpEntity<Object>(headers);

    //ResponseEntity<String> out = restTemplate.postForEntity(new URI("https://localhost:8443"), entity, String.class);
    ResponseEntity<String> response
            = restTemplate.getForEntity("https://localhost:8443", String.class);

    return true;

  }

问题是运行我们的单元测试总是 org.springframework.web.client.ResourceAccessException Caused by: java.net.ConnectException

public static MockWebServer mockBackEnd;
      @Autowired Controller Controller;
      MissionController mc = Mockito.mock(Controller.class);
    
      @Mock
      RestTemplate mockRestTemplate;
    
      @Mock public ResponseEntity<String> responseEntity;

      @Test
  public void GetRequestTest() throws IOException, URISyntaxException {
    Mockito.when(mockRestTemplate.getForEntity(any(), eq(String.class))).thenReturn(responseEntity);
    Mockito.when(mock.isBackendRunning()).thenReturn(true);
    mockBackEnd.enqueue(new MockResponse().setBody(response).addHeader(content, app_json));
    assertEquals(
        ...
            .getMissionJSON(MockOAuth2AuthenticationToken.createAuthCountry())
            .toString());
  }

在上面的代码示例中，我尝试将 get restTemplate 模拟为 return 结果，并模拟该方法。我认为这会阻止该方法实际上运行代码并只给我一个结果，以便我们可以进行单元测试。事实并非如此。

如何在不出现这些错误的情况下处理此检查？ OpenConnection 不适用于我们设置程序的方式。我已经尝试了很多不同的方法来让它与 restTemplate 一起工作。

Answer 1

看起来您有一个带有 RestTemplate 依赖项的 MissionController class，并且您想将该依赖项的模拟注入到 MissionController 实例中以对 isBackendRunning 方法进行单元测试。

@RunWith(MockitoJUnitRunner.class)
public class MissionControllerTest {
  @Mock
  private RestTemplate mockRestTemplate;
  @Mock 
  private ResponseEntity<String> responseEntity;
  @InjectMocks
  private MissionController missionController = new MissionController();
  @Test
  public void GetRequestTest() throws Exception {
   Mockito.when(mockRestTemplate.getForEntity(any(), 
      any(Class.class))).thenReturn(responseEntity);
   boolean running = missionController.isBackendRunning();

   assertTrue(running);
  }
}

restTemplate.postForEntity 的单元测试导致 ResourceAccessException

Unit test for restTemplate.postForEntity causes ResourceAccessException

java

url

unit-testing

http

resttemplate