VocabularySerializationTest.php

<?php

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}
     */
    public function setUp() : void {
        parent::setUp();
        Vocabulary::create([
            'vid' => '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');
    }

}