[jira] [Created] (FLINK-7554) Add a testing RuntimeContext to test utilities

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-7554:
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             Summary: 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


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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