如何使用 Mockito 在 Junit 测试用例中验证 logger.error(String message, Throwable t)答案

【问题标题】：How to verify logger.error(String message, Throwable t) in Junit testcase using Mockito如何使用 Mockito 在 Junit 测试用例中验证 logger.error(String message, Throwable t)
【发布时间】：2019-01-31 08:52:12
【问题描述】：

我正在尝试测试 Kafka 回调 onFailure 方法：

     @Override
        public void onFailure(Throwable ex) {
        logger.error("Failure while sending message in kafka.", ex);
            }

My test case code using Mockito. I am setting exception in object of class SettableListenableFuture.



   SettableListenableFuture<SendResult<String, DeserializationResult<EnvelopeExpanded<SpecificRecord>>>> future2 = new SettableListenableFuture<>();
                future2.setException(new Exception("Could not publish to Kafka"));
    Exception ex = new Exception("Could not publish to Kafka");
    verify(logger, times(1)).error("Failure while sending message in kafka.", ex);

我收到了这个错误

  Argument(s) are different! Wanted:
    logger.error(
        "Failure while sending message in kafka.",
        java.lang.Exception: Could not publish to Kafka
    );

    Actual invocation has different arguments:
    logger.error(
        "Failure while sending message in kafka.",
        java.lang.Exception: Could not publish to Kafka
    );

想要的和实际的参数都是一样的，但它仍然会抛出错误。谁能帮我解决这个问题？？

【问题讨论】：

标签： java spring-boot junit mockito

【解决方案1】：

System.out.println(new Exception("Could not publish to Kafka").equals(new Exception("Could not publish to Kafka"))) 将打印false

所以

   Exception ex = new Exception("Could not publish to Kafka");
   SettableListenableFuture<...> future2 = new SettableListenableFuture<>();
            future2.setException(ex);
   verify(logger, times(1)).error("Failure while sending message in kafka.", ex);

应该工作

【讨论】：