public function testHashDistributionWithCrc32Hasher() { $hashSpace = new Flexihash(new Flexihash_Crc32Hasher()); foreach (range(1, $this->_targets) as $i) { $hashSpace->addTarget("target{$i}"); } $results = array(); foreach (range(1, $this->_lookups) as $i) { $results[$i] = $hashSpace->lookup("t{$i}"); } $distribution = array(); foreach ($hashSpace->getAllTargets() as $target) { $distribution[$target] = count(array_keys($results, $target)); } $this->dump(sprintf("Distribution of %d lookups per target (min/max/median/avg): %d/%d/%d/%d", $this->_lookups / $this->_targets, min($distribution), max($distribution), round($this->_median($distribution)), round(array_sum($distribution) / count($distribution)))); }
public function testRemoveTarget() { $hashSpace = new Flexihash(); $hashSpace->addTarget('t-a')->addTarget('t-b')->addTarget('t-c')->removeTarget('t-b'); $this->assertEqual($hashSpace->getAllTargets(), array('t-a', 't-c')); }