异步私有函数的单元测试覆盖率

Question

我使用SpringBoot，我必须为一个函数编写单元测试，该函数通过TaskExecutor调用另一个私有函数。问题是单元测试无法覆盖私有功能。这是代码： threadconfig.vi可：

@Configuration
@EnableAsync
public class ThreadConfig {

  @Bean(name = "taskExecutor")
  public TaskExecutor taskExecutor() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(1);
    executor.setMaxPoolSize(1);
    executor.initialize();
    return executor;
  }
}

Service.java：

@Service
public class Service {
    @Autowired
    @Qualifier("taskExecutor") 
    private TaskExecutor taskExecutor;

      public String test() {
          Runnable task = this::task;
          taskExecutor.execute(task);
          return "OK";
       }
      private void task(){
          System.out.println("Test");
      }
}

ServiceTest.java

@RunWith(SpringRunner.class)
public class ServiceTest {

  @Mock(name = "taskExecutor")
  private TaskExecutor taskExecutor;

  @InjectMocks private Service service;

  @Test
  public void test() {
    final String expected = "OK";
    Mockito.doNothing().when(taskExecutor).execute(Matchers.any(Runnable.class));
    assertEquals(expected, service.test());
  }
}

测试可以覆盖test（）函数但不能覆盖task（）函数