有人能为这段代码建议一个mockito测试吗？

Question

public List<String> getTopics(String user, String repo){
    GitHubRequest request = new GitHubRequest();
    List<String> topic_list = new ArrayList<>();
    try {
        Repository repository = repositoryService.getRepository(user,repo);
        String url =  repository.getUrl().split("//")[1].split("api.github.com")[1];
        request.setUri(url + "/topics");
        String result = new BufferedReader(new InputStreamReader(gitHubClient.getStream(request)))
                .lines().collect(Collectors.joining("\n"));
        JSONObject jsonObject = new JSONObject(result);
        topic_list = Arrays.stream(jsonObject.get("names").toString().replace("[", "").replace("]", "").split(",")).collect(Collectors.toList());
    } catch (IOException e) {
        e.printStackTrace();
    }
    return topic_list;
}

Answer 1

首先，您需要将模拟对象（repositoryService,gitHubClient）注入到您的函数中。

如果使用Spring/Spring Boot，可以考虑使用@mock和@mockbean注释。来嘲笑必要的bean。

下面的代码手动创建模拟对象。

RepositoryService fakeRs = Mockito.mock(RepositoryService.class);
GitHubClient fakeGHC = Mockito.mock(GitHubClient.class);

ReflectionTestUtils.setField(yourService, "repositoryService", fakeRs);
ReflectionTestUtils.setField(yourService, "gitHubClient", fakeGHC);

    @Test
    public void testGetTopics(){
       // init mock object code in case setter/getter/reflection utils
       Repository expectedRepository = createExampleRepository();
Mockito.when(repositoryService.getRepository(Mockito.anyString(),Mockito.anyString())
.thenReturn(expectedRepository);

     // continue to fake gitHubClient with your expected data/ exceptions...
    //call your method
    List<?> data = yourService.getTopic("user","data");
    Assertions.assertTrue(data!=null); 
   // you can write few assertion base on your fake datas
    }