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Posted to dev@lucene.apache.org by "Gregory Chanan (JIRA)" <ji...@apache.org> on 2014/03/15 00:54:42 UTC
[jira] [Updated] (SOLR-5865) Provide a MiniSolrCloudCluster to
enable easier testing
[ https://issues.apache.org/jira/browse/SOLR-5865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Chanan updated SOLR-5865:
---------------------------------
Attachment: SOLR-5865.patch
Here's a patch that implements a MiniSolrCloudCluster and a simple test exercising it. The test doesn't use the normal LuceneTestCase test class hierarchy, because that is one of the motivations for the MiniSolrCloudCluster: that downstream projects will want to use their own test framework.
One limitation on the test currently is it does not start a MiniDFSCluster, as the code necessary for that lives in solr/core rather than the test framework. I'm not 100% sure why that is, but if no one has an objection I'll go ahead and make that change in a later patch.
To demonstrate to myself that this is useful, I implemented one of the Apache Sentry tests using this test framework rather than AbstractFullDistribZkTestBase. See the current state of the test here: https://github.com/apache/incubator-sentry/blob/644e8be346a152e43fa435b9adbb47ce6b3e3e91/sentry-tests/sentry-tests-solr/src/test/java/org/apache/sentry/tests/e2e/solr/AbstractSolrSentryTestBase.java. This was pretty straightforward, with the exception of getting the MiniDFSCluster stuff correct, as mentioned above.
> Provide a MiniSolrCloudCluster to enable easier testing
> -------------------------------------------------------
>
> Key: SOLR-5865
> URL: https://issues.apache.org/jira/browse/SOLR-5865
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 4.7, 5.0
> Reporter: Gregory Chanan
> Attachments: SOLR-5865.patch
>
>
> Today, the SolrCloud tests are based on the LuceneTestCase class hierarchy, which has a couple of issues around support for downstream projects:
> - It's difficult to test SolrCloud support in a downstream project that may have its own test framework. For example, some projects have support for different storage backends (e.g. Solr/ElasticSearch/HBase) and want tests against each of the different backends. This is difficult to do cleanly, because the Solr tests require derivation from LuceneTestCase, while the other don't
> - The LuceneTestCase class hierarchy is really designed for internal solr tests (e.g. it randomizes a lot of parameters to get test coverage, but a downstream project probably doesn't care about that). It's also quite complicated and dense, much more so than a downstream project would want.
> Given these reasons, it would be nice to provide a simple "MiniSolrCloudCluster", similar to how HDFS provides a MiniHdfsCluster or HBase provides a MiniHBaseCluster.
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