RegistryTest.php

<?php

/**
 * @file
 * Definition of Drupal\system\Tests\Theme\RegistryTest.
 */
namespace Drupal\system\Tests\Theme;

use Drupal\simpletest\WebTestBase;
use Drupal\Core\Utility\ThemeRegistry;

/**
 * Tests the ThemeRegistry class.
 */
class RegistryTest extends WebTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = array(
    'theme_test',
  );
  protected $profile = 'testing';
  public static function getInfo() {
    return array(
      'name' => 'ThemeRegistry',
      'description' => 'Tests the behavior of the ThemeRegistry class',
      'group' => 'Theme',
    );
  }

  /**
   * Tests the behavior of the theme registry class.
   */
  function testRaceCondition() {
    $_SERVER['REQUEST_METHOD'] = 'GET';
    $cid = 'test_theme_registry';

    // Directly instantiate the theme registry, this will cause a base cache
    // entry to be written in __construct().
    $registry = new ThemeRegistry($cid, 'cache', array(
      'theme_registry' => TRUE,
    ), $this->container
      ->get('module_handler')
      ->isLoaded());
    $this
      ->assertTrue(cache()
      ->get($cid), 'Cache entry was created.');

    // Trigger a cache miss for an offset.
    $this
      ->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry.');

    // This will cause the ThemeRegistry class to write an updated version of
    // the cache entry when it is destroyed, usually at the end of the request.
    // Before that happens, manually delete the cache entry we created earlier
    // so that the new entry is written from scratch.
    cache()
      ->delete($cid);

    // Destroy the class so that it triggers a cache write for the offset.
    unset($registry);
    $this
      ->assertTrue(cache()
      ->get($cid), 'Cache entry was created.');

    // Create a new instance of the class. Confirm that both the offset
    // requested previously, and one that has not yet been requested are both
    // available.
    $registry = new ThemeRegistry($cid, 'cache', array(
      'theme_registry' => TRUE,
    ));
    $this
      ->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry');
    $this
      ->assertTrue($registry['theme_test_template_test_2'], 'Offset was returned correctly from the theme registry');
  }

}