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Diffstat (limited to 'test/pending/run/hashCodeDistribution.scala')
-rw-r--r-- | test/pending/run/hashCodeDistribution.scala | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/pending/run/hashCodeDistribution.scala b/test/pending/run/hashCodeDistribution.scala new file mode 100644 index 0000000000..5be9d1db6d --- /dev/null +++ b/test/pending/run/hashCodeDistribution.scala @@ -0,0 +1,17 @@ +// See ticket #2537. +object Test { + case class C(x: Int, y: Int) { } + val COUNT = 300 + val totalCodes = COUNT * COUNT + + def main (args: Array[String]) = { + val hashCodes = + for (x <- 0 until COUNT; y <- 0 until COUNT) yield C(x,y).hashCode + + val uniques = hashCodes.distinct + val collisionRate = (totalCodes - uniques.size) * 1000 / totalCodes + + assert(collisionRate < 5, "Collision rate too high: %d / 1000".format(collisionRate)) + // println("collisionRate = %d / 1000".format(collisionRate)) + } +}
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