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https://issues.apache.org/jira/browse/SOLR-10229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896759#comment-15896759
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David Smiley commented on SOLR-10229:
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I whole heartedly agree that tests should try to avoid creating config files,
and that the advent of managed schema and other APIs now allows us to do that
whereas in the past it wasn't. [~noble.paul] and I were talking about this a
couple weeks ago. I've got a technique for it in the patch here SOLR-10117 I
_very_ briefly just examined SOLR-5260 which you just referenced but I don't
think the identical technique applies to many tests that don't care about
SolrCloud (thus needn't have the overhead of a test using SolrCloud via
SolrCloudTestCase).
bq. WDYT about making this into some better thought-out utility?
Yes; It should be made easier -- not that it's hard but it took some time for
me to figure out how to do it without copying/writing new configs to disk
(something I want to avoid). I'm curious what you think of the test in
SOLR-10117.
> See what it would take to shift many of our one-off schemas used for testing
> to managed schema and construct them as part of the tests
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-10229
> URL: https://issues.apache.org/jira/browse/SOLR-10229
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Erick Erickson
> Priority: Minor
>
> The test schema files are intimidating. There are about a zillion of them,
> and making a change in any of them risks breaking some _other_ test. That
> leaves people three choices:
> 1> add what they need to some existing schema. Which makes schemas bigger and
> bigger and bigger.
> 2> create a new schema file, adding to the proliferation thereof.
> 3> Look through all the existing tests to see if they have something that
> works.
> The recent work on LUCENE-7705 is a case in point. We're adding a maxLen
> parameter to some tokenizers. Putting those parameters into any of the
> existing schemas, especially to test < 255 char tokens is virtually
> guaranteed to break other tests, so the only safe thing to do is make another
> schema file. Adding to the multiplication of files.
> As part of SOLR-5260 I tried creating the schema on the fly rather than
> creating a new static schema file and it's not hard. WDYT about making this
> into some better thought-out utility?
> At present, this is pretty fuzzy, I wanted to get some reactions before
> putting much effort into it. I expect that the utility methods would
> eventually get a bunch of canned types. It's reasonably straightforward for
> primitive types, if lengthy. But when you get into solr.TextField-based types
> it gets less straight-forward.
> We could manage to just move the "intimidation" from the plethora of schema
> files to a zillion fieldTypes in the utility to choose from...
> Also, forcing every test to define the fields up-front is arguably less
> convenient than just having _some_ canned schemas we can use. And erroneous
> schemas to test failure modes are probably not very good fits for any such
> framework.
> [~steve_rowe] and [[email protected]] in particular might have
> something to say.
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