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https://issues.apache.org/jira/browse/KAFKA-6473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16405638#comment-16405638
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ASF GitHub Bot commented on KAFKA-6473:
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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 MockProcessorContext.
> This is a public API change and requires a KIP:
> https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals
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