Boyang Chen commented on KAFKA-6381:

[~mjsax] I did have a try on this one, and found that I could not come up with 
a valid mockĀ KStreams. So leaving this one unassigned right now since I might 
not have time to tackle it. Sorry for taking so long to response!

> Improve KafkaStreamsTest for localThreadMetadata
> ------------------------------------------------
>                 Key: KAFKA-6381
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6381
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams, unit tests
>            Reporter: Matthias J. Sax
>            Priority: Minor
> Currently, we have a rather basic test for 
> {{KafkaStreams#localThreadMetadata}} (ie, 
> {{KafkaStreamsTests#shouldReturnThreadMetadata()}}.
> In a PR discussion [~guozhang] mentioned:
> {quote}
> I'm wondering if it is better to fill into the topology with some processor 
> and then check the following active and standby tasks as non-empty would 
> cover more scenarios? In addition, we can use waitForCondition to wait for 
> the state to become RUNNING and the tasks list become non-empty.
> {quote}
> We should extend the current test method and/or add new test methods to cover 
> this and other scenario.

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