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spring - Spring IT 测试 - 不能子类化最终类

问题描述

这是我的服务类：

@Validated
public final class SenderImpl implements Sender {

  private static final Logger LOGGER = LoggerFactory.getLogger(SenderImpl.class);

  private final ExchangeService exchangeService;
  private final IntegratorService integratorService;

  @Autowired
  public SenderImpl(ExchangeService exchangeService, IntegratorService integratorService) {
    this.exchangeService = exchangeService;
    this.integratorService = integratorService;
  }

  @Override
  public String send(@NotNull String rawData, @NotNull String channelName) throws ClientException {
    (...)

    return rawMessage;
  }
}

这是我需要自动装配ApplicationContext的此类的 IT 测试：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class SenderTestIT {

  @Autowired
  private ApplicationContext applicationContext;

  @Autowired
  private Sender sender;

  @MockBean
  private SecurityHelper securityHelper;

  @Before
  public void setup() {
    (...)
  }

  @Test
  public void testSending() throws ClientException {
    // given

    // when
    String response = sender.send("...", "...");

    // then
    assertThat(response).isNotNull();
  }
}

运行后出现如下错误：

Caused by: java.lang.IllegalArgumentException: Cannot subclass final class com.projects.pl.services.SenderImpl
    at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:565)
    at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
    at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
    at org.springframework.aop.framework.CglibAopProxy$ClassLoaderAwareUndeclaredThrowableStrategy.generate(CglibAopProxy.java:1004)
    at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:329)
    at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:492)
    at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
    at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)

这可能是由我的SenderImpl类中的final修饰符引起的。这是好方法吗？如果是，那么解决方法是什么？

标签： springdependency-injectionintegration-testinginversion-of-control

解决方案

不要让你的SenderImpl 课程结束。

您的日志跟踪显示 Spring 正在使用CGLIB.

CGLIB将扩展SenderImpl以进行代理。

工作的要求CGLIB是让你的课程不是最终的。

因此异常

Cannot subclass final class com.projects.pl.services.SenderImpl

您可以在此处阅读有关 CGLIB的更多信息

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