java - JMockit 和 Jersey JAX-RS 测试

Question

我有一个 Jersey REST Web 服务，我想构建一个单元测试，我按照 Jersey Test 文档提供的步骤进行操作，但在我的 Web 服务中，我引用了处理流程业务逻辑的其他类，我尝试使用 JMockit 来模拟该服务引用的业务服务类，但出现错误:

ProdService 是我的 RESTful JAX-RS Web 服务。ProdServiceBusinessRemote是我的业务服务接口(interface)，它注入(inject)到ProdService中并进行业务逻辑处理。我想在 ProdServiceTest 中模拟 ProdServiceBusinessRemote:

public class ProdServiceTest extends JerseyTest {

    @Injectable
    private ProdServiceBusinessRemote prodServiceBusinessRemote;

    @Before 
    public void setUp() throws Exception {
        initMocks(); 
    }

    private void initMocks() throws Exception {
        new NonStrictExpectations() {{
            prodServiceBusinessRemote.query();
            result = null;          
        }};

    }

    @Override
    protected Application configure() {
        return new ResourceConfig(ProdService.class);
    }

    @Test
    public void test() throws Exception {
        List list = target("prod").request().get(List.class);
        org.junit.Assert.assertTrue(list == null);
    }
}

如果我在没有 @RunWith(JMockit.class) 的情况下运行

java.lang.IllegalStateException: JMockit wasn't properly initialized; please ensure that jmockit precedes junit in the runtime classpath, or use @RunWith(JMockit.class)

如果我使用 @RunWith(JMockit.class) 运行，我会在 JerseyTest 内部函数中得到 NullPointerException:

public final WebTarget target() {
    return client().target(getTestContainer().getBaseUri());
}

其中 client() 为 null；

有没有办法同时使用 Jmockit 和 JerseyTest ？对于引用外部类的服务，Jersey 有何建议？如何 mock 这些？

Answer 1

我找到的解决方案是进行以下更改:

1. 确保 jmockit jar 在 pom.xml 中的 junit 之前加载:

       <!-- ************ TEST DEPENDENCIES ************ -->
       <dependency>
          <groupId>org.jmockit</groupId> 
          <artifactId>jmockit</artifactId> 
          <version>${jmockit.version}</version>
          <scope>test</scope>
       </dependency>
   
       <dependency>
           <groupId>junit</groupId>
           <artifactId>junit</artifactId>
           <version>${junit.version}</version>
           <scope>test</scope>
       </dependency>
   

2. 不要使用 @RunWith(JMockit.class) 注释您的测试类，并确保您拥有 Jersey 测试的所有额外 Maven 依赖项:

       <!-- ************** Jersey Test ************************ -->
       <dependency>
           <groupId>org.glassfish.jersey.test-framework.providers</groupId>
           <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
           <version>${org.glassfish.jersey.core.version}</version>
           <scope>test</scope>
       </dependency>
   

3. 您的测试类需要扩展 JerseyTest。因此避免使用@Before和@After注释。

4. 要测试的示例类:

   @Path("/报价")

   public class OfferService extends BaseWebService {
   
   @EJB(mappedName = "myapp/OfferServiceBean")
   private OfferServiceBeanLocal offerServiceBean;
   public OfferServiceBeanLocal getServiceBean() {
       return offerServiceBean;
   }
   public void setOfferServiceBean(OfferServiceBeanLocal offerServiceBean) {
       this.offerServiceBean = offerServiceBean;
   }
   @POST
   @Consumes(MediaType.APPLICATION_JSON)
   @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
   @Path("/offers") 
   public ListResponseDto<OfferDto> searchOffers(@Valid ListRequest v) {
   
           ListResponseDto<OfferDto> list = null;              
           try {           
               list = getServiceBean().getSellerOfferList(v);         
           } catch(Exception e) {
               logException(e);
           }      
           return list;      
   }
   

   }

5. OfferService 测试类:

   公共(public)类 OfferServiceTest 扩展 JerseyTest {

   @Mocked
   private HttpServletRequest request;
   
   @Mocked 
   private HttpServletResponse response;
   
   @Override
   protected Application configure() {
       enable(TestProperties.LOG_TRAFFIC);
       enable(TestProperties.DUMP_ENTITY);
   
       OfferService service = new OfferService();
   
       // inject a Mocked EJB instance into your resource class
       service.setOfferServiceBean(new OfferServiceBeanMock());
       ResourceConfig config = new ResourceConfig();
       config.register(service);        
       return config;
   }
   
   @Test
   public void test() throws Exception {
       // mocking static singleton example:
       new MockUp<ConfigurationManager>()
       {
           @Mock
           ConfigurationManager getInstance()
           {
               return MockWebTestUtil.buildConfigurationManagerMock(); 
           }
       };
       String expectedText = "{\"list\":[{\"id\":\"0\",\"name\":\"offer_0\"price\":0},{\"id\":\"1\",\"name\":\"offer_1\",\"price\":1}],\"summary\":{\"params\":null,\"page\":1,\"pageCount\":1,\"totalCount\":2},\"status\":{\"statusCode\":\"SUCCESS\",\"statusMessage\":null}}";
   
       ListRequest l = new ListRequest();
       l.setPage(1);
       l.setSearchColumns(new ArrayList<>());
       l.setRowsPerPage(10);
   
       Response output = target("/offer/offers").request(MediaType.APPLICATION_JSON).post(Entity.json(l));       
       Assert.assertTrue(output.getStatus() == HttpStatus.OK_200);             
       Assert.assertTrue(output.getHeaders().get("Content-Type").get(0).equals("application/json"));
       String textBody = output.readEntity(String.class);              
       Assert.assertTrue(textBody.equals(expectedText));
   }   
   

   }

   类 OfferServiceBeanMock 实现 OfferServiceBeanLocal {

   @Override
   public ListResponseDto<OfferDto> getSellerOfferList(ListRequest v) throws ServiceException {        
       OfferListResponse resp = null;
       try {
           // build 2 sample offers
           resp = MockWebTestUtil.buildOfferListResponseDto(2);                
       } catch (Exception e) {}
       return resp;
   }
   

   }