Java 运行测试用例时，ClientHttpResponse抛出401错误

我的单元测试有问题。在我的单元测试中，我得到了401未经授权的响应状态，我不知道如何解决这个问题。这不是一个Spring项目

我的测试班

@RunWith(MockitoJUnitRunner.class)
public class LTest {

    @Test
    public void test_retrieve() throws Exceptions{
        CloseableHttpClient mockHttpClient = mock(CloseableHttpClient.class);
        CloseableHttpResponse mockHttpResponse = mock(CloseableHttpResponse.class);
        HttpEntity mockEntity = mock(HttpEntity.class);
        StatusLine mockStatusLine = mock(StatusLine.class);

        when(mockHttpClient.execute(new HttpGet(new URIBuilder(anyString()).build()))).thenReturn(mockHttpResponse);
        when(mockHttpResponse.getEntity()).thenReturn(mockEntity);
        when(mockHttpResponse.getStatusLine()).thenReturn(mockStatusLine);
        when(mockStatusLine.getStatusCode()).thenReturn(HttpStatus.SC_OK);

        Map<String, Employee> map = sample.retrieve();
        assertNotNull(map);
        assertEquals(1,map.size());
    }

在运行测试用例时，它显示断言错误，因为它要通过catch块，因为下面的行抛出的是401而不是200

CloseableHttpResponse httpResponse = httpClient.execute(new HttpGet(builder.build()));

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有人能帮我解决我遇到的上述错误吗？

在测试中，

HTTPClient

没有被模拟，这就是失败的原因

要模拟

HTTPClient

，我们可以遵循以下策略

提取类中的

getHttpClient（）

，测试为

接下来在test类中，我们可以通过在匿名类中对ClassToBeTested进行子类化来注入mock，如下所示

---

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更新：模拟httpClient后，

httpClient.execute（）

应返回

SC\u OK

。但是，由于mock

HttpEntity

将返回null，因此反序列化响应将失败。为了避免它，我们宁愿发送一个

StringEntity

。使用详细信息更新了实际类和测试类。

您没有模拟http客户端

CloseableHttpClient httpClient=HttpClientUtils.setupClient（HttpClientBuilder.create（））.build（）。一个选项是将此行提取到一个单独的
getHttpClient（）
方法。Mock或override方法并传递
mockHttpClient
是的，我发现这一行已经在产生问题，但是如何Mock或override我不知道。我对写测试用例还不熟悉，像这样的事情我需要做吗
@Override protected HttpClient getHttpClient（）{return mockHttpClient；}
我添加了一个答案，看看它是否适合您的场景？@Override正在抛出错误。方法不重写其超类中的方法。它对我没有帮助。仍然存在相同的问题。请向上滚动，问题中已经提到了代码。当我尝试模拟httpClient时，测试用例抛出了NullPointerException，谢谢，它成功了。我在顶部声明了CloseableHttpResponse httpResponse，然后尝试访问else块中的对象。这就是问题的根源。
CloseableHttpResponse httpResponse = httpClient.execute(new HttpGet(builder.build()));

public class HttpClientToBeTested {

    public Map retrieve() throws URISyntaxException, IOException {
        CloseableHttpClient httpClient = getHttpClient();
        String url = "http://someexample.com";

        URIBuilder builder = new URIBuilder(url)
                .setParameter("limit","5")
                .setParameter("centre","centre");

        CloseableHttpResponse httpResponse = httpClient.execute(new HttpGet(builder.build()));
        if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
            try{
                String entity = EntityUtils.toString(httpResponse.getEntity());
                //ObjectNode node = new ObjectMapper().readValue(entity,ObjectNode.class);
                Map node = new ObjectMapper().readValue(entity, Map.class); // Assume ObjectNode is a custom class, so for demo using Map.
                return node;
            } catch (IOException e){
                e.printStackTrace();
                throw e;
            }
        }
        return null;
    }

    // New extracted method that will be mocked in the test case
    protected CloseableHttpClient getHttpClient() {
        return HttpClientBuilder.create().build();
    }
}

@Test
public void test_retrieve() throws Exception {
    CloseableHttpClient mockHttpClient = mock(CloseableHttpClient.class);
    CloseableHttpResponse mockHttpResponse = mock(CloseableHttpResponse.class);
    //HttpEntity mockEntity = mock(HttpEntity.class); Not required since we will pass actual entity
    StatusLine mockStatusLine = mock(StatusLine.class);

    when(mockHttpClient.execute(new HttpGet(new URIBuilder(anyString()).build()))).thenReturn(mockHttpResponse);
    when(mockHttpResponse.getEntity()).thenReturn(new StringEntity("{\"key\":\"value\"}")); // Important: Pass your actual response as string here.
    when(mockHttpResponse.getStatusLine()).thenReturn(mockStatusLine);
    when(mockStatusLine.getStatusCode()).thenReturn(HttpStatus.SC_OK);

    // Code to mock the http client
    HttpClientToBeTested sample = new HttpClientToBeTested() {
        @Override
        protected CloseableHttpClient getHttpClient() {
            return mockHttpClient;
        }
    };

    Map map = sample.retrieve();
    assertNotNull(map);
    assertEquals(1,map.size());
}