class EntityResolverTest

class EntityResolverTest extends NormalizerTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'hal',
        'rest',
    ];
    
    /**
     * The format being tested.
     *
     * @var string
     */
    protected $format = 'hal_json';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create the test field storage.
        FieldStorageConfig::create([
            'entity_type' => 'entity_test_mulrev',
            'field_name' => 'field_test_entity_reference',
            'type' => 'entity_reference',
            'settings' => [
                'target_type' => 'entity_test_mulrev',
            ],
        ])->save();
        // Create the test field.
        FieldConfig::create([
            'entity_type' => 'entity_test_mulrev',
            'field_name' => 'field_test_entity_reference',
            'bundle' => 'entity_test_mulrev',
        ])->save();
    }
    
    /**
     * Tests that fields referencing UUIDs can be denormalized.
     */
    public function testUuidEntityResolver() {
        // Create an entity to get the UUID from.
        $entity = EntityTestMulRev::create([
            'type' => 'entity_test_mulrev',
        ]);
        $entity->set('name', 'foobar');
        $entity->set('field_test_entity_reference', [
            [
                'target_id' => 1,
            ],
        ]);
        $entity->save();
        $field_uri = Url::fromUri('base:rest/relation/entity_test_mulrev/entity_test_mulrev/field_test_entity_reference', [
            'absolute' => TRUE,
        ])->toString();
        $data = [
            '_links' => [
                'type' => [
                    'href' => Url::fromUri('base:rest/type/entity_test_mulrev/entity_test_mulrev', [
                        'absolute' => TRUE,
                    ])->toString(),
                ],
                $field_uri => [
                    [
                        'href' => $entity->toUrl()
                            ->toString(),
                    ],
                ],
            ],
            '_embedded' => [
                $field_uri => [
                    [
                        '_links' => [
                            'self' => $entity->toUrl()
                                ->toString(),
                        ],
                        'uuid' => [
                            [
                                'value' => $entity->uuid(),
                            ],
                        ],
                    ],
                ],
            ],
        ];
        $denormalized = $this->container
            ->get('serializer')
            ->denormalize($data, 'Drupal\\entity_test\\Entity\\EntityTestMulRev', $this->format);
        $field_value = $denormalized->get('field_test_entity_reference')
            ->getValue();
        $this->assertEquals(1, $field_value[0]['target_id'], 'Entity reference resolved using UUID.');
    }

}