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Posted to user@cassandra.apache.org by Edward Capriolo <ed...@gmail.com> on 2017/03/15 22:47:17 UTC

Ye old singleton debate

This question came up today:

OK, say you mock, how do you construct a working multi-process
representation of how C* actually works from within a unit test without
running the code that actually constructs the cluster?

1) Don't do that (construct a multinode cluster in a test) just mock the
crap out of it.

http://www.baeldung.com/mockito-verify

2) dtests
Dtest don't actually do this in the classic sense. One challenge is
code-coverage. For many projects I use cobertura.
http://www.mojohaus.org/cobertura-maven-plugin/. Cobertura can't (as far as
know) can not instrument N JVMs and give you coverage. Bringing up a full
on cluster to test something is slow, compute intensive, and quite hard.

3) Fix it
https://issues.apache.org/jira/browse/CASSANDRA-7837
https://issues.apache.org/jira/browse/CASSANDRA-10283

*Impossible you say!  No NoSQL JAVA DATABASE CAN DO THIS!!!*

https://www.elastic.co/guide/en/elasticsearch/reference/current/integration-tests.html

Wouldn't that be just the bees knees???

Re: Ye old singleton debate

Posted by Ali Akhtar <al...@gmail.com>.

+1. Would be awesome if this could be mocked / tested.

On Thu, Mar 16, 2017 at 3:47 AM, Edward Capriolo <ed...@gmail.com>
wrote:

> This question came up today:
>
> OK, say you mock, how do you construct a working multi-process
> representation of how C* actually works from within a unit test without
> running the code that actually constructs the cluster?
>
> 1) Don't do that (construct a multinode cluster in a test) just mock the
> crap out of it.
>
> http://www.baeldung.com/mockito-verify
>
> 2) dtests
> Dtest don't actually do this in the classic sense. One challenge is
> code-coverage. For many projects I use cobertura. http://www.
> mojohaus.org/cobertura-maven-plugin/. Cobertura can't (as far as know)
> can not instrument N JVMs and give you coverage. Bringing up a full on
> cluster to test something is slow, compute intensive, and quite hard.
>
> 3) Fix it
> https://issues.apache.org/jira/browse/CASSANDRA-7837
> https://issues.apache.org/jira/browse/CASSANDRA-10283
>
> *Impossible you say!  No NoSQL JAVA DATABASE CAN DO THIS!!!*
>
> https://www.elastic.co/guide/en/elasticsearch/reference/
> current/integration-tests.html
>
> Wouldn't that be just the bees knees???
>
>
>
>
>
>
>