spring-boot - 如何测试 WebExceptionHandler

Question

如果我这样写测试并且它不会在测试中被 WebExceptionHandler 捕获

@RunWith(SpringRunner.class)
@SpringBootTest
@EnableAutoConfiguration
public class projectTest {
    @Test
    public void test ()
    {
        if(true)
        {
            throw new NullPointerException();
        }
    }
}

在 WebExceptionHandler

@ControllerAdvice
@Slf4j
public class WebExceptionHandler {
    @ExceptionHandler(NullPointerException.class)
    @ResponseBody
    public void customerException(NullPointerException e) {
        System.out.println("handle the excpetion");
    }
}

如何测试 WebExceptionHandler ？