VocabularySerializationTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\taxonomy\Functional;

use Drupal\taxonomy\Entity\Vocabulary;
use Drupal\Tests\BrowserTestBase;

/**
 * Regression test for https://www.drupal.org/node/2807263.
 *
 * When a Vocabulary entity is unserialized before the modules have been loaded
 * (which happens in the KernelPreHandle Stack middleware), then the constants
 * that the Vocabulary entity uses are not yet available because they are set in
 * taxonomy.module. This means that for example the PageCache middleware cannot
 * load any cached Vocabulary entity, because unserialization will fail.
 *
 * @group taxonomy
 */
class VocabularySerializationTest extends BrowserTestBase {

  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'taxonomy',
    'vocabulary_serialization_test',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    Vocabulary::create([
      'vid' => 'test',
      'name' => 'Test',
    ])
      ->save();
  }
  public function testSerialization() {
    $this
      ->drupalGet('/vocabulary_serialization_test/test');
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertSame('this is the output', $this
      ->getSession()
      ->getPage()
      ->getContent());
    $this
      ->assertSession()
      ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
    $this
      ->drupalGet('/vocabulary_serialization_test/test');
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertSame('this is the output', $this
      ->getSession()
      ->getPage()
      ->getContent());
    $this
      ->assertSession()
      ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
  }

}