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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6473) Add MockProcessorContext to public test-utils
Date Tue, 20 Mar 2018 00:29:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16405638#comment-16405638

ASF GitHub Bot commented on KAFKA-6473:

vvcephei opened a new pull request #4736: KAFKA-6473: Add MockProcessorContext to public test-utils
URL: https://github.com/apache/kafka/pull/4736
   We are adding a public testing utility to make it easier to unit test Processor implementations.
   See KIP-267 (https://cwiki.apache.org/confluence/display/KAFKA/KIP-267%3A+Add+Processor+Unit+Test+Support+to+Kafka+Streams+Test+Utils).
   The testing for this change is in this commit. There are behavioral and unit tests.
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)

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> Add MockProcessorContext to public test-utils
> ---------------------------------------------
>                 Key: KAFKA-6473
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6473
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>    Affects Versions: 1.1.0
>            Reporter: Matthias J. Sax
>            Assignee: John Roesler
>            Priority: Major
>              Labels: needs-kip, user-experience
> With KIP-247, we added public test-utils artifact with a TopologyTestDriver class. Using
the test driver for a single Processor/Transformer/ValueTransformer it's required to specify
a whole topology with source and sink and plus the Processor/Transformer/ValueTransformer
into it.
> For unit testing, it might be more convenient to have a MockProcessorContext, that can
be used to test the Processor/Transformer/ValueTransformer in isolation. Ie, the test itself creates
new Processor/Transformer/ValueTransformer object and calls init() manually passing in the
> This is a public API change and requires a KIP: https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals

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