我如何进行单元测试？

 public Mono<List<Transaction>> get(String id) {
            return class
                    .get(id).log()
                 .retryWhen(throwableFlux -> throwableFlux) 
                .zipWith(Flux.range(min, max + 1), (error, retry) -> new RetryException(error, retry))
                .flatMap(retryException -> {
                    if(retryException.getRetries() == max + 1) {
                        throw Exceptions.propagate(retryException.getThrowable());
                    } else if (isClientException(retryException.getThrowable())){
                        return Flux.empty();
                    }
                    return Mono.delay(Duration.ofMinutes( new Double(multiplier * retryException.getRetries()).longValue()));
                }));
        }

如何使用StepVerifier来测试此方法？

实现重试逻辑的另一种方式，

throwableFlux.takeWhile(throwable -> !isClientException(throwable))
            .flatMap(e -> {
                if(count.get() >= max + 1) {
                    throw Exceptions.propagate(e);
                }
                LOG.info("Retrying in..");
                return Mono.delay(Duration.ofMinutes(new Double(multiplier * count.getAndAdd(1)).longValue()));
            });