John Roesler created KAFKA-10200:
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Summary: MockProcessorContext doesn't work with WindowStores
Key: KAFKA-10200
URL: https://issues.apache.org/jira/browse/KAFKA-10200
Project: Kafka
Issue Type: Bug
Components: streams, streams-test-utils
Reporter: John Roesler
Assignee: John Roesler
The recommended pattern for testing custom Processor implementations is to use
the test-utils MockProcessorContext. If a Processor implementation needs a
store, the store also has to be initialized with the same context. However, the
existing (in-memory and persistent) Windowed store implementations perform
internal casts that result in class cast exceptions if you attempt to
initialize them with the MockProcessorContext.
A workaround is to instead embed the processor in an application and use the
TopologyTestDriver instead.
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