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https://issues.apache.org/jira/browse/CASSANDRA-13458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15999210#comment-15999210
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Blake Eggleston commented on CASSANDRA-13458:
---------------------------------------------
With regard to testing (and having just a high level understanding of what
you're proposing with the diagnostic events) I think they could be really
helpful with unit testing, and in some cases, more pragmatic than refactoring.
Without more understanding of exactly what's going on under the hood here
though, it's hard for me to say for sure. I have a feeling diagnostic events
will end up being really cool though, so I've pulled down your branch and will
try to spend some time reading through it over the next week or so.
> Diag. Events: Add unit testing support
> --------------------------------------
>
> Key: CASSANDRA-13458
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13458
> Project: Cassandra
> Issue Type: Sub-task
> Components: Testing
> Reporter: Stefan Podkowinski
> Assignee: Stefan Podkowinski
>
> Diagnostic events will improve unit testing by
> * providing test execution control instances based on CompletableFutures (see
> [PendingRangeCalculatorServiceTest.java|https://github.com/spodkowinski/cassandra/blob/WIP-13458/test/unit/org/apache/cassandra/gms/PendingRangeCalculatorServiceTest.java])
>
> * validate state and behavior by allowing you to inspect generated events
> (see
> [HintsServiceEventsTest.java|https://github.com/spodkowinski/cassandra/blob/WIP-13458/test/unit/org/apache/cassandra/hints/HintsServiceEventsTest.java])
> See included
> [testing.rst|https://github.com/spodkowinski/cassandra/blob/WIP-13458/doc/source/development/testing.rst#diagnostic-events-40]
> draft for more details. Let me know if this would be useful for you as a
> developer.
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