DatabaseBackendTagTest.php in Drupal 8

Namespace

Drupal\KernelTests\Core\Cache

File

core/tests/Drupal/KernelTests/Core/Cache/DatabaseBackendTagTest.php

<?php

namespace Drupal\KernelTests\Core\Cache;

use Drupal\Core\Cache\Cache;
use Drupal\Core\Database\Database;
use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\DependencyInjection\Reference;

/**
 * Tests DatabaseBackend cache tag implementation.
 *
 * @group Cache
 */
class DatabaseBackendTagTest extends KernelTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = [
    'system',
  ];

  /**
   * {@inheritdoc}
   */
  public function register(ContainerBuilder $container) {
    parent::register($container);

    // Change container to database cache backends.
    $container
      ->register('cache_factory', 'Drupal\\Core\\Cache\\CacheFactory')
      ->addArgument(new Reference('settings'))
      ->addMethodCall('setContainer', [
      new Reference('service_container'),
    ]);
  }
  public function testTagInvalidations() {

    // Create cache entry in multiple bins.
    $tags = [
      'test_tag:1',
      'test_tag:2',
      'test_tag:3',
    ];
    $bins = [
      'data',
      'bootstrap',
      'render',
    ];
    foreach ($bins as $bin) {
      $bin = \Drupal::cache($bin);
      $bin
        ->set('test', 'value', Cache::PERMANENT, $tags);
      $this
        ->assertNotEmpty($bin
        ->get('test'), 'Cache item was set in bin.');
    }
    $connection = Database::getConnection();
    $invalidations_before = intval($connection
      ->select('cachetags')
      ->fields('cachetags', [
      'invalidations',
    ])
      ->condition('tag', 'test_tag:2')
      ->execute()
      ->fetchField());
    Cache::invalidateTags([
      'test_tag:2',
    ]);

    // Test that cache entry has been invalidated in multiple bins.
    foreach ($bins as $bin) {
      $bin = \Drupal::cache($bin);
      $this
        ->assertFalse($bin
        ->get('test'), 'Tag invalidation affected item in bin.');
    }

    // Test that only one tag invalidation has occurred.
    $invalidations_after = intval($connection
      ->select('cachetags')
      ->fields('cachetags', [
      'invalidations',
    ])
      ->condition('tag', 'test_tag:2')
      ->execute()
      ->fetchField());
    $this
      ->assertEqual($invalidations_after, $invalidations_before + 1, 'Only one addition cache tag invalidation has occurred after invalidating a tag used in multiple bins.');
  }

}

Classes

Name	Description
DatabaseBackendTagTest	Tests DatabaseBackend cache tag implementation.