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Matthias J. Sax commented on KAFKA-15242: ----------------------------------------- The example ([https://github.com/zveljkovic/kafka-repro/blob/master/src/test/java/com/example/demo/MyFixedKeyProcessorTest.java]) tries to use `MockProcessorContext` to test `FixedKeyProcessor` – this does not work. Adding `MockFixKeyProcessorContext` should allow to test` FixKeyProcessor` using this newly added class. What other issue does this ticket include that's not covered? Can you elaborate? > FixedKeyProcessor testing is unusable > ------------------------------------- > > Key: KAFKA-15242 > URL: https://issues.apache.org/jira/browse/KAFKA-15242 > Project: Kafka > Issue Type: Bug > Components: streams > Reporter: Zlstibor Veljkovic > Assignee: Alexander Aghili > Priority: Major > > Using mock processor context to get the forwarded message doesn't work. > Also there is not a well documented way for testing FixedKeyProcessors. > Please see the repo at [https://github.com/zveljkovic/kafka-repro] > but most important piece is test file with runtime and compile time errors: > [https://github.com/zveljkovic/kafka-repro/blob/master/src/test/java/com/example/demo/MyFixedKeyProcessorTest.java] > -- This message was sent by Atlassian Jira (v8.20.10#820010)