模拟的 HttpClient 调用实际的方法 [英] Mocked HttpClient calls actual method

问题描述

在我的测试类中，我正在模拟 HTTPclient，但是当我运行测试类时，它调用实际方法而不是在线模拟

In my test class I am mocking HTTPclient but when I run test class it calls actual method instead of mock at line

 final HttpResponse response = httpClient.execute(postRequest);

然后给我 java.lang.IllegalStateException.

and gives me java.lang.IllegalStateException.

这是我的代码

  final HttpClient httpClient = new DefaultHttpClient();
  final HttpPost postRequest = new HttpPost(someURL);
  final String inputJson = mapper.writeValueAsString(someObj);
  final StringEntity input = new StringEntity(inputJson);

  input.setContentType("application/json");
  postRequest.setEntity(input);
  final HttpResponse response = httpClient.execute(postRequest);

  if (response.getStatusLine().getStatusCode() != 200) {
               throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
  }

  final BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));

这是我的测试类代码

public class XGenericServiceTest {


@InjectMocks
private XGenericService xGenericService = new XGenericService();

@Mock
HttpClient httpClient;

@Mock
HttpResponse httpResponse;

@Mock
HttpEntity httpEntity;

@Mock
StatusLine statusLine;

@Mock
HttpPost httpPost;

@Before
public void init() {
    MockitoAnnotations.initMocks(this);

}

  @Test
  public void testgetXClient(){

    try {
            String s =  "[{"firstName":"adasd"}]";
when(httpClient.execute(Mockito.isA(HttpPost.class))).thenReturn(httpResponse);
            when(httpResponse.getStatusLine()).thenReturn(statusLine);
            when(statusLine.getStatusCode()).thenReturn(HttpStatus.SC_OK);
            when(httpEntity.getContent()).thenReturn(new ByteArrayInputStream(s.getBytes()));
            when(httpResponse.getEntity()).thenReturn(httpEntity);
            List<MdmClient> results = xGenericService.getXClient("userId", "surname", "givenName", "postalCode", "availableId", "phoneNumber", "organizationName", "otherKey");

    } catch (Exception e) {
        e.printStackTrace();
    } 

  }

}

但我得到以下异常

java.lang.IllegalStateException: Target host must not be null, or set in parameters.
at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:784)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:414)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
at au.com.allianz.omnia.service.SafireGenericService.getSafireClient(SafireGenericService.java:87)
at au.com.allianz.omnia.service.SafireGenericServiceTest.testgetSafireClient(SafireGenericServiceTest.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:613)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)

谁能指出上面的代码有什么问题?

Can anybody point me what is wrong with above code?

推荐答案

从共享的代码片段可以看出，HttpClient 和 HttpPost 是通过 new 实例化的 运算符，而不是使用任何实例级注入(即自动装配)对象.

From the code snippet shared it is evident that HttpClient and HttpPost are instantiated via new operator instead of using any instance level injected (i.e. autowired) objects.

 final HttpClient httpClient = new DefaultHttpClient();
 final HttpPost postRequest = new HttpPost(someURL);

因此 @InjectMocks 和 @Mock 基本上没有效果，HttpClient 和 real 实例从测试类调用时使用code>HttpPost；这解释了遇到的错误.

Thus the @InjectMocks and @Mock essentially have no effect and the real instance of HttpClient and HttpPost are used when invoked from test class; which explains the error encountered.

在这种特殊情况下，Mockito(可能是任何模拟框架)都无济于事.要继续，如果可能，重构被测代码，例如使用实例级注入对象，而不是使用通过 new 运算符创建的实例.

In this particular scenario Mockito (perhaps any mocking framework) can't help. To proceed, if possible, refactor the code under test such as to use the instance level injected object(s) instead of using the instance created via new operator.

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