THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Discussion thread: here
JIRA: here KAFKA-6460
Motivation
This is for adding mocks for state stores used in Streams unit testing. We'd like to use mocks for different types of state stores: KV, window, session - that can be used to record the number of expected put / get calls used in the DSL operator unit testing. These will provide conveniency for developers when they are writing unit test for kafka stream and other related modules.
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