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https://issues.apache.org/jira/browse/KAFKA-8200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Patrik Kleindl resolved KAFKA-8200.
-----------------------------------
    Resolution: Won't Do

Discarded in favor of 
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-456%3A+Helper+classes+to+make+it+simpler+to+write+test+logic+with+TopologyTestDriver]

> TopologyTestDriver should offer an iterable signature of readOutput
> -------------------------------------------------------------------
>
>                 Key: KAFKA-8200
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8200
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: Michael Drogalis
>            Assignee: Patrik Kleindl
>            Priority: Minor
>              Labels: needs-kip
>
> When using the TopologyTestDriver, one examines the output on a topic with 
> the readOutput method. This method returns one record at a time, until no 
> more records can be found, at which point in returns null.
> Many times, the usage pattern around readOutput will involve writing a loop 
> to extract a number of records from the topic, building up a list of records, 
> until it returns null.
> It would be helpful to offer an iterable signature of readOutput, which 
> returns either an iterator or list over the records that are currently 
> available in the topic. This would effectively remove the loop that a user 
> needs to write for him/herself each time.
> Such a signature might look like:
> {code:java}
> public Iterable<ProducerRecord<byte[],byte[]>> readOutput(java.lang.String 
> topic);
> {code}



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