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https://issues.apache.org/jira/browse/LUCENE-4148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13295713#comment-13295713
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Dawid Weiss commented on LUCENE-4148:
-------------------------------------
Try RandomInts from randomizedtesting, it does what you need:
{code}
/**
* A random integer from <code>min</code> to <code>max</code> (inclusive).
*/
public static int randomIntBetween(Random r, int min, int max) {
assert max >= min : "max must be >= min: " + min + ", " + max;
long range = (long) max - (long) min;
if (range < Integer.MAX_VALUE) {
return min + r.nextInt(1 + (int) range);
} else {
return min + (int) Math.round(r.nextDouble() * range);
}
}
{code}
> _TestUtil should be able to generate random longs
> -------------------------------------------------
>
> Key: LUCENE-4148
> URL: https://issues.apache.org/jira/browse/LUCENE-4148
> Project: Lucene - Java
> Issue Type: Improvement
> Components: general/test
> Reporter: Adrien Grand
> Priority: Trivial
>
> It would be helpful in TestPackedInts at least, in order to generate random
> values (as a workaround, we currently generate a random int between 0 and
> {{min(Integer.MAX_VALUE, PackedInts.maxValue(bitsPerValue)}}). Moreover, it
> would help to fix {{nextInt}} for large ranges (calling {{nextInt(random,
> -10, Integer.MAX_VALUE)}} or even {{nextInt(random, 0, Integer.MAX_VALUE)}}
> currently fails because the range of values is {{> Integer.MAX_VALUE}}.
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