Can't test tombstone event NullPointerException

[HugoSerge]

Hello,

I'm trying to assert that my topic contains a tombstone event.

Message produced by producer :

key: "randomKey"
value: null

With this code

kafkaTemplate.send(topicName, keyGenerator(itemId.toString(), warehouseGln), null);

In the_topic_contains method

    public void the_topic_contains(Guard guard, boolean fromBeginning, String topicValue, Comparison comparison, String name, String content) {
      ...
            Map<String, String> headers = (Map)Stream.of(record.headers().toArray()).collect(Collectors.toMap(Header::key, (header) -> new String(header.value())));
            Map<String, Object> value = (Map)Mapper.read(record.value().toString()); <----- NPE here
            String messageKey = record.key() != null ? String.valueOf(record.key()) : "";
      ...
        });
    }

Stacktrace

java.lang.NullPointerException: Cannot invoke "Object.toString()" because the return value of "org.apache.kafka.clients.consumer.ConsumerRecord.value()" is null 
	at com.decathlon.tzatziki.steps.KafkaSteps.lambda$the_topic_contains$20(KafkaSteps.java:304)  

If I'm using library correctly I think it's an issue.
Don't hesitate to give me the correct way to achieve this assertion if not.
Thanks

[HugoSerge]

I can fix it if we agree that's an issue :)

[alexandrepa]

Feel free to propose a fix 😄 . Seems decent to me to cover this particular case 👍

[jak78dkt]

Hi @HugoSerge. Thanks for reporting the issue. Have you tried to use ?isNull in your gherkin assertion as a workaround?