ApcuBackendTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Cache;

use Drupal\Component\Datetime\TimeInterface;
use Drupal\Core\Cache\ApcuBackend;

/**
 * Tests the APCu cache backend.
 *
 * @group Cache
 * @requires extension apcu
 */
class ApcuBackendTest extends GenericCacheBackendUnitTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected function createCacheBackend($bin) {
        return new ApcuBackend($bin, $this->databasePrefix, \Drupal::service('cache_tags.invalidator.checksum'), \Drupal::service(TimeInterface::class));
    }
    
    /**
     * {@inheritdoc}
     */
    protected function tearDown() : void {
        foreach ($this->cacheBackends as $bin => $cache_backend) {
            $this->cacheBackends[$bin]
                ->removeBin();
        }
        parent::tearDown();
    }
    
    /**
     * {@inheritdoc}
     */
    public function testSetGet() : void {
        parent::testSetGet();
        // Make sure entries are permanent (i.e. no TTL).
        $backend = $this->getCacheBackend($this->getTestBin());
        $key = $backend->getApcuKey('TEST8');
        $iterator = new \APCUIterator('/^' . $key . '/');
        foreach ($iterator as $item) {
            $this->assertEquals(0, $item['ttl']);
            $found = TRUE;
        }
        $this->assertTrue($found);
    }

}