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https://issues.apache.org/jira/browse/FLINK-7554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414083#comment-16414083
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Timo Walther commented on FLINK-7554:
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[~wind_ljy] I gave you contributor permissions. You can now assign the issue to
yourself.
> Add a testing RuntimeContext to test utilities
> ----------------------------------------------
>
> Key: FLINK-7554
> URL: https://issues.apache.org/jira/browse/FLINK-7554
> Project: Flink
> Issue Type: New Feature
> Components: Tests
> Reporter: Timo Walther
> Priority: Major
> Labels: starter
>
> When unit testing user-defined functions it would be useful to have an
> official testing {{RuntimeContext}} that uses Java collections for storing
> state, metrics, etc.
> After executing the business logic, the user could then verify how the state
> of the UDF changed or which metrics have been collected.
> This issue includes documentation for the "Testing" section.
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