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https://issues.apache.org/jira/browse/PDFBOX-1977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13932020#comment-13932020
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John Hewson edited comment on PDFBOX-1977 at 3/12/14 5:17 PM:
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The test does use a random seed, but [Unit tests should not be
non-deterministic|http://martinfowler.com/articles/nonDeterminism.html]. The
data can be generated using Random() but the seed needs to be constant. Better
still, the test should be run on a set of representative data.
was (Author: jahewson):
[Unit tests should not be
non-deterministic|http://martinfowler.com/articles/nonDeterminism.html]. The
data can be generated using Random() but the seed needs to be constant. Better
still, the test should be run on a set of representative data.
> LZWFilter fails / TestFilters is non-determinate
> ------------------------------------------------
>
> Key: PDFBOX-1977
> URL: https://issues.apache.org/jira/browse/PDFBOX-1977
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.5, 2.0.0
> Reporter: John Hewson
> Assignee: Tilman Hausherr
> Labels: LZW
> Fix For: 1.8.5, 2.0.0
>
>
> TestFilters uses Random().nextLong() to generate a seed for random data,
> which means that it is non-determinate. Depending on the seed value, the test
> may fail or succeed.
> Using the following seed results in the LZW filter failing:
> final long seed = -6257105096642706464L;
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