[jira] [Created] (SAMZA-681) Create a unit test harness to easily test samza tasks

["Luis De Pombo (JIRA)" <ji...@apache.org>]

Luis De Pombo created SAMZA-681:
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             Summary: Create a unit test harness to easily test samza tasks
                 Key: SAMZA-681
                 URL: https://issues.apache.org/jira/browse/SAMZA-681
             Project: Samza
          Issue Type: Test
          Components: test
            Reporter: Luis De Pombo
            Assignee: Luis De Pombo


We don't have a standardized test framework for unit testing samza tasks. Currently, in order to test the proper functionality of a task we have to bring up the system (kafka) and its dependencies (zk). 

Goals:
- The harness should abstract several notions around the system and its partitions, without mocking them, and hold task context and state in memory. 
- The harness should let you inject several <key,value> pairs that would normally be passed in by the `SystemStream` provided in `tasks.input`. 
- The same harness should offer an interface to visualize all the corresponding <key,value> pairs collected in the message `Collector`, which are the output of the `process`ed or `window`ed input <key,value> pairs previously injected.



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