soarez commented on a change in pull request #9000: URL: https://github.com/apache/kafka/pull/9000#discussion_r474950526
########## File path: streams/src/test/java/org/apache/kafka/streams/kstream/internals/KStreamImplTest.java ########## @@ -1865,6 +1865,17 @@ public void shouldNotAllowNullNamedOnTransformWithStoreName() { assertThat(exception.getMessage(), equalTo("named can't be null")); } + @Test + public void shouldNotAllowBadTransformerSupplierOnFlatTransform() { Review comment: Ok. I just added equivalent documentation changes, checks and tests for `ValueTransformerSupplier` and `ValueTransformerWithKeySupplier` as well in 567d5e0 . ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org