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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2025 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Cluster\Distributor;
use PredisTestCase;
abstract class PredisDistributorTestCase extends PredisTestCase
{
/**
* Returns a new instance of the tested distributor.
*
* @return DistributorInterface
*/
abstract protected function getDistributorInstance(): DistributorInterface;
/**
* Returns a list of nodes from the hashring.
*
* @param DistributorInterface $distributor Distributor instance.
* @param int $iterations Number of nodes to fetch.
*
* @return array Nodes from the hashring.
*/
protected function getNodes(DistributorInterface $distributor, int $iterations = 10): array
{
$nodes = [];
for ($i = 0; $i < $iterations; ++$i) {
$hash = $distributor->hash($i * $i);
$nodes[] = $distributor->getByHash($hash);
}
return $nodes;
}
/**
* Returns a distributor instance with the specified nodes added.
*
* @param array $nodes Nodes to add to the distributor.
*
* @return DistributorInterface
*/
protected function getSampleDistribution(array $nodes): DistributorInterface
{
$distributor = $this->getDistributorInstance();
foreach ($nodes as $node) {
$distributor->add($node);
}
return $distributor;
}
/**
* @group disconnected
*/
public function testEmptyRingThrowsException(): void
{
$this->expectException('Predis\Cluster\Distributor\EmptyRingException');
$distributor = $this->getDistributorInstance();
$distributor->getByHash('nodehash');
}
/**
* @group disconnected
*/
public function testRemoveOnEmptyRingDoesNotThrowException(): void
{
$distributor = $this->getDistributorInstance();
$this->assertNull($distributor->remove('node'));
}
}
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