我正在努力为方面代码编写单元测试用例。请找到所有相应的代码。

自定义注解-

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface WriteAccessAuthorization{
  boolean isAdmin() default false;
}

纵横比代码-

@Aspect
  class AccessAspect {
  ...
  ...
    boolean isAdminForWriteAccess(ProceedingJoinPoint joinPoint) {
      MethodSignature signature = (MethodSignature) joinPoint.getSignature();
      Method method = signature.getMethod();
      WriteAccessAuthorization writeAccessAuthorization =
          method.getAnnotation(WriteAccessAuthorization.class);
      return writeAccessAuthorization.isAdminPortal();
    }
  ...
  }

在这里，我在方法的最后一行获得了NPE。在这里，方法.getAnnotation()返回NULL，即使我们在Junit测试方法中模拟它。

请找到junit测试用例代码-

class AccessAspectTest {
  @Mock private ProceedingJoinPoint joinPoint;
  @Mock private MethodSignature methodSignature;
  @Mock private Method method;
  @Mock private WriteAccessAuthorization writeAccessAuthorization;
  @InjectMocks private AccessAspect accessAspect;

  @BeforeEach
  public void setup() {
    MockitoAnnotations.openMocks(this);
  }

  @Test
  void test_isAdmin()
      throws Throwable {
    //Given
    when(joinPoint.getSignature()).thenReturn(methodSignature);
    when(methodSignature.getMethod()).thenReturn(getDeclaredMethod(WriteAccessAuthorization.class));
    when(method.getAnnotation(WriteAccessAuthorization.class)).thenReturn(writeAccessAuthorization);

    //When
    accessAspect.isAdminForWriteAccess(joinPoint);

    //Then
    verify(joinPoint, times(1)).proceed();
  }

  @NotNull
  private <T> Method getDeclaredMethod(Class<T> clazz) throws NoSuchMethodException {
    return clazz.getDeclaredMethod("isAdmin");
  }

}

在许多博客或stackoverflow答案中，都提到在您的注解中有运行时策略，但在我的例子中，它已经被放置了。如果还需要什么，请告诉我。