class FieldItemNormalizerTest

class FieldItemNormalizerTest extends JsonapiKernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'user',
        'link',
        'entity_test',
        'serialization',
    ];
    
    /**
     * The normalizer.
     *
     * @var \Drupal\jsonapi\Normalizer\FieldItemNormalizer
     */
    private $normalizer;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $etm = $this->container
            ->get('entity_type.manager');
        $this->normalizer = new FieldItemNormalizer($etm);
        $this->normalizer
            ->setSerializer($this->container
            ->get('jsonapi.serializer'));
        $definitions = [];
        $definitions['links'] = BaseFieldDefinition::create('link')->setLabel('Links');
        $definitions['internal_property_value'] = BaseFieldDefinition::create('single_internal_property_test')->setLabel('Internal property');
        $definitions['no_main_property_value'] = BaseFieldDefinition::create('map')->setLabel('No main property');
        $this->container
            ->get('state')
            ->set('entity_test.additional_base_field_definitions', $definitions);
        $etm->clearCachedDefinitions();
    }
    
    /**
     * Tests a field item that has no properties.
     *
     * @covers ::normalize
     */
    public function testNormalizeFieldItemWithoutProperties() : void {
        $item = $this->prophesize(FieldItemInterface::class);
        $item->getProperties(TRUE)
            ->willReturn([]);
        $item->getValue()
            ->willReturn('Direct call to getValue');
        $result = $this->normalizer
            ->normalize($item->reveal(), 'api_json');
        assert($result instanceof CacheableNormalization);
        $this->assertSame('Direct call to getValue', $result->getNormalization());
    }
    
    /**
     * Tests normalizing field item.
     */
    public function testNormalizeFieldItem() : void {
        $entity = EntityTest::create([
            'name' => 'Test entity',
            'links' => [
                [
                    'uri' => 'https://www.drupal.org',
                    'title' => 'Drupal.org',
                    'options' => [
                        'query' => 'foo=bar',
                    ],
                ],
            ],
            'internal_property_value' => [
                [
                    'value' => 'Internal property testing!',
                ],
            ],
            'no_main_property_value' => [
                [
                    'value' => 'No main property testing!',
                ],
            ],
        ]);
        // Verify a field with one property is flattened.
        $result = $this->normalizer
            ->normalize($entity->get('name')
            ->first());
        assert($result instanceof CacheableNormalization);
        $this->assertEquals('Test entity', $result->getNormalization());
        // Verify a field with multiple public properties has all of them returned.
        $result = $this->normalizer
            ->normalize($entity->get('links')
            ->first());
        assert($result instanceof CacheableNormalization);
        $this->assertEquals([
            'uri' => 'https://www.drupal.org',
            'title' => 'Drupal.org',
            'options' => [
                'query' => 'foo=bar',
            ],
        ], $result->getNormalization());
        // Verify a field with one public property and one internal only returns the
        // public property, and is flattened.
        $result = $this->normalizer
            ->normalize($entity->get('internal_property_value')
            ->first());
        assert($result instanceof CacheableNormalization);
        // Property `internal_value` will not exist.
        $this->assertEquals('Internal property testing!', $result->getNormalization());
        // Verify a field with one public property but no main property is not
        // flattened.
        $result = $this->normalizer
            ->normalize($entity->get('no_main_property_value')
            ->first());
        assert($result instanceof CacheableNormalization);
        $this->assertEquals([
            'value' => 'No main property testing!',
        ], $result->getNormalization());
    }

}