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https://issues.apache.org/jira/browse/LUCENE-2659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-2659:
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Attachment: LUCENE-2659.patch
> lucenetestcase ease of use improvements
> ---------------------------------------
>
> Key: LUCENE-2659
> URL: https://issues.apache.org/jira/browse/LUCENE-2659
> Project: Lucene - Java
> Issue Type: Test
> Components: Tests
> Reporter: Robert Muir
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2659.patch
>
>
> I started working on this in LUCENE-2658, here is the finished patch.
> There are some problems with LuceneTestCase:
> * a tests beforeClass, or the test itself (its @befores and its method),
> might have some
> random behavior, but only the latter can be reproduced with -Dtests.seed
> * if you want to do things in beforeClass, you have to use a different API:
> newDirectory(random)
> instead of newDirectory, etc.
> * for a new user, the current output can be verbose, confusing and
> overwhelming.
> So, I refactored this class to address these problems.
> A class still needs 2 seeds internally, as the beforeClass will only run
> once,
> but the methods or setUp() might run many times, especially when increasing
> iterations.
> but lucenetestcase deals with this, and the "seed" is 128-bit (UUID):
> the MSB is initialized in beforeClass, the LSB varied for each method run.
> if you provide a seed with a -D, they are both fixed to the UUID you provided.
> I fixed the API to be consistent, so you should be able to migrate a test
> from
> setUp() to beforeClass() [junit3 to junit4] without changing parameters.
> The codec, locale, timezone is only printed once at the end if any tests
> fail,
> as its per-class anyway (setup in beforeClass)
> finally, when a test fails, you get a single "reproduce with" command line
> you can copy and paste to reproduce.
> this way you dont have to spend time trying to figure out what the command
> line should be.
> {noformat}
> [junit] Tests run: 2, Failures: 2, Errors: 0, Time elapsed: 0.197 sec
> [junit]
> [junit] ------------- Standard Output ---------------
> [junit] NOTE: reproduce with: ant test -Dtestcase=TestExample
> -Dtestmethod=testMethodA
> -Dtests.seed=a51e707b-6550-7800-9f8c-72622d14bf5f
> [junit] NOTE: reproduce with: ant test -Dtestcase=TestExample
> -Dtestmethod=testMethodB
> -Dtests.seed=a51e707b-6550-7800-f7eb-2efca3820738
> [junit] NOTE: test params are: codec=PreFlex, locale=ar_LY,
> timezone=Etc/UCT
> [junit] ------------- ---------------- ---------------
> [junit] Test org.apache.lucene.util.TestExample FAILED
> {noformat}
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