SerializationTest.php

<?php

namespace Drupal\Tests\serialization\Kernel;

use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\Serializer\Exception\UnexpectedValueException;

/**
 * Functional tests for serialization system.
 *
 * @group serialization
 */
class SerializationTest extends KernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'serialization',
        'serialization_test',
    ];
    
    /**
     * The serializer service to test.
     *
     * @var \Symfony\Component\Serializer\SerializerInterface
     */
    protected $serializer;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->serializer = $this->container
            ->get('serializer');
    }
    
    /**
     * Confirms that modules can register normalizers and encoders.
     */
    public function testSerializerComponentRegistration() {
        $object = new \stdClass();
        $format = 'serialization_test';
        $expected = 'Normalized by SerializationTestNormalizer, Encoded by SerializationTestEncoder';
        // Ensure the serialization invokes the expected normalizer and encoder.
        $this->assertSame($expected, $this->serializer
            ->serialize($object, $format));
        // Ensure the serialization fails for an unsupported format.
        try {
            $this->serializer
                ->serialize($object, 'unsupported_format');
            $this->fail('The serializer was expected to throw an exception for an unsupported format, but did not.');
        } catch (UnexpectedValueException $e) {
            // Expected exception; just continue testing.
        }
    }

}