Question

我正处于开始编程的阶段，我想问一下如何使用Mockito模拟对象，更具体地说是Unirest响应。假设我有一个数据库，并且每次测试时我都不会打扰它，我想为此使用Mockito，但是问题是我不确定如何创建将返回的假“ httpResponse”对象。为了提供一些背景信息，我附上了我的代码：

    /**
 * This method lists the ID of the activity when requested.
 *
 * @return the list of all activities
 */
public  JSONArray getActivites() {
    HttpResponse<JsonNode> jsonResponse = null;
    try {
        jsonResponse = Unirest
                .get("http://111.111.111.111:8080/activity")
                .header("accept", "application/json")
                .asJson();
    } catch (UnirestException e) {
        System.out.println("Server is unreachable");
    }

    JSONArray listOfActivities = jsonResponse.getBody().getArray();
    return listOfActivities;
}

所以我想到的是模拟Unirest，然后在调用.get方法时，我将返回伪造的HttpResponse，问题是，我不确定该怎么做，我已经在网上查看并且无法真的很有意义。是否可以在实际的数据库中进行1次操作，然后“提取”信息并每次都将其用于测试？

Answer 1

与此同时，原始作者通过 unirest-mocks 提供模拟支持：

马文：

<dependency>
    <groupId>com.konghq</groupId>
    <artifactId>unirest-mocks</artifactId>
    <version>LATEST</version>
    <scope>test</scope>
</dependency>

用法：

class MyTest {
    @Test
    void expectGet(){
        MockClient mock = MockClient.register();

        mock.expect(HttpMethod.GET, "http://zombo.com")
                        .thenReturn("You can do anything!");
        
        assertEquals(
            "You can do anything!", 
            Unirest.get("http://zombo.com").asString().getBody()
        );
        
        //Optional: Verify all expectations were fulfilled
        mock.verifyAll();
    }
}

Answer 2

带有PowerMockRunner，PowerMockito和Mockito的示例代码片段

@RunWith(PowerMockRunner.class)
    @PrepareForTest({ Unirest.class})
    public class TestApp{

      @Before
      public void setup() {
        PowerMockito.mockStatic(Unirest.class);
      }

      @Test
      public void shouldTestgetActivites() throws UnirestException {
        when(Unirest.get(Client.DEFAULT_BASE_URL)).thenReturn(getRequest);
        when(getRequest.asJson()).thenReturn(httpResponse);
        when(httpResponse.getStatus()).thenReturn(Integer.valueOf(200));

        assertThat(something).isEqualTo(true);
      }

    }

Answer 3

您可以将调用包装在可基于某些参数提供HttpResponse的包装器类中，而不是直接调用静态成员。这是一个可以在Mockito中轻松模拟的界面。

/**
 * This is a wrapper around a Unirest API.
 */
class UnirestWrapper {

    private HttpResponse<JsonNode> getResponse(String accept, String url) {
        try {
            return Unirest
                .get(url)
                .header("accept", accept)
                .asJson();
        } catch (UnirestException e) {
            System.out.println("Server is unreachable");
        }
        // Or create a NULL HttpResponse instance.
        return null;
    }
}

private final UnirestWrapper unirestWrapper;

ThisClassConstructor(UnirestWrapper unirestWrapper) {
    this.unirestWrapper = unirestWrapper;
}

/**
 * This method lists the ID of the activity when requested.
 *
 * @return the list of all activities
 */
public JSONArray getActivites() {
    HttpResponse<JsonNode> jsonResponse = this.unirestWrapper.getResponse("http://111.111.111.111:8080/activity", "application/json");

    if (jsonResponse == null) {
        return null;
    }

    JSONArray listOfActivities = jsonResponse.getBody().getArray();
    return listOfActivities;
}

或者您可以使用电源模拟...

用嘲笑嘲笑Unirest

3 个答案: