问使用Mockito模拟Apache后HTTPClient

EN

public class ProductService {

    private final VaultConfig vaultConfig;
    private final AppConfig appConfig;

    public ProductService(VaultConfig vaultConfig,
                          @Autowired AppConfig appConfig) {
            this.vaultConfig = vaultConfig;
            this.appConfig = appConfig;
    }

    private void createAccessToken() {
        String httpUrl = MessageFormat.format("{0}/api/v1/authentication/login",
            appConfig.getProductServerUrl());
        CloseableHttpClient client = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(httpUrl);
        List<NameValuePair> httpParams = new ArrayList<NameValuePair>();
        httpParams.add(new BasicNameValuePair("username", this.vaultConfig.getProductAdminUsername()));
        httpParams.add(new BasicNameValuePair("password", this.vaultConfig.getProductAdminPassword()));

        try {
            httpPost.setEntity(new UrlEncodedFormEntity(httpParams));
            CloseableHttpResponse closeableHttpResponse = client.execute(httpPost);
            HttpEntity entity = closeableHttpResponse.getEntity();
            String tokenDataJson = EntityUtils.toString(entity, "UTF-8");
            String newAccessToken = new Gson().fromJson(tokenDataJson, Map.class).get("access_token").toString();
            this.vaultConfig.setProductAccessToken(newAccessToken);
        } catch (Exception e) {
            logger.error("Unable to create access token: " + e.getMessage());
        }
    }

public class ProductServiceTest {

    private ProductService productService;
    @Mock
    HttpClients httpClients;
    @Mock
    CloseableHttpClient closeableHttpClient;
    @Mock
    HttpPost httpPost;
    @Mock
    CloseableHttpResponse closeableHttpResponse;
    @Mock
    private VaultConfig vaultConfig;
    @Mock
    private AppConfig appConfig;

    @BeforeEach
    public void initialize() {
        MockitoAnnotations.openMocks(this);
        productService = new ProductService(vaultConfig, appConfig);
    }


   void getAccessTokenWhenEmpty() throws IOException {
        //given
        String expectedProductAccessToken = "ABC";

        //and:
        given(appConfig.getProductServerUrl()).willReturn("https://test.abcd.com");
        given(closeableHttpClient.execute(httpPost)).willReturn(closeableHttpResponse);
        given(vaultConfig.getProductAccessToken()).willReturn("");

        //when
        String actualProductAccessToken = ProductService.getAccessToken();

        //then
        Assertions.assertEquals(actualProductAccessToken,expectedProductAccessToken);
    }

    } catch (Exception e) {

java.net.UnknownHostException: test.abcd.com: unknown error