Improve random seed portability for test cases
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Key: LUCENE-2853
URL: https://issues.apache.org/jira/browse/LUCENE-2853
Project: Lucene - Java
Issue Type: Bug
Components: Build
Affects Versions: 4.0
Reporter: Robert Muir
Fix For: 4.0
Currently, tests get a random seed, and several possibilities can be randomly
assigned, or fixed to
specific values with -Dtests.codec or -Dtests.directory.
The default values for these sort of things is 'random'.
I think it would be a great improvement if we:
* improved our code here so that we always consume the same amount from the
Random. this means for example, if you specific -Dtests.directory=RAMDirectory,
we should consume a wasted int, where we would normally pick one from random.
* in 3.x, i think its worth it to actually consume wasted ints where 4.0 picks
the codec.
With these changes, you could ideally (in many situations situations)
# take a failure and modify parameters to see if its specific to a particular
codec or directory, or a general problem
# take a failure from trunk and see if it affects 3.x
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