class ExternalNormalizersTest

class ExternalNormalizersTest extends BrowserTestBase {
    use GetDocumentFromResponseTrait;
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The original value for the test field.
     *
     * @var string
     */
    const VALUE_ORIGINAL = 'Llamas are super awesome!';
    
    /**
     * The expected overridden value for the test field.
     *
     * @see \Drupal\jsonapi_test_field_type\Normalizer\StringNormalizer
     * @see \Drupal\jsonapi_test_data_type\Normalizer\StringNormalizer
     */
    const VALUE_OVERRIDDEN = 'Llamas are NOT awesome!';
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'jsonapi',
        'entity_test',
    ];
    
    /**
     * The test entity.
     *
     * @var \Drupal\entity_test\Entity\EntityTest
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // This test is not about access control at all, so allow anonymous users to
        // view and create the test entities.
        Role::load(RoleInterface::ANONYMOUS_ID)->grantPermission('view test entity')
            ->grantPermission('create entity_test entity_test_with_bundle entities')
            ->save();
        $this->config('jsonapi.settings')
            ->set('read_only', FALSE)
            ->save(TRUE);
        FieldStorageConfig::create([
            'field_name' => 'field_test',
            'type' => 'string',
            'entity_type' => 'entity_test',
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_test',
            'entity_type' => 'entity_test',
            'bundle' => 'entity_test',
        ])->save();
        $this->entity = EntityTest::create([
            'name' => 'Llama',
            'type' => 'entity_test',
            'field_test' => static::VALUE_ORIGINAL,
        ]);
        $this->entity
            ->save();
    }
    
    /**
     * Tests a format-agnostic normalizer.
     *
     * @param string $test_module
     *   The test module to install, which comes with a high-priority normalizer.
     * @param string $expected_value_jsonapi_normalization
     *   The expected JSON:API normalization of the tested field. Must be either
     *   - static::VALUE_ORIGINAL (normalizer IS NOT expected to override)
     *   - static::VALUE_OVERRIDDEN (normalizer IS expected to override)
     * @param string $expected_value_jsonapi_denormalization
     *   The expected JSON:API denormalization of the tested field. Must be either
     *   - static::VALUE_OVERRIDDEN (denormalizer IS NOT expected to override)
     *   - static::VALUE_ORIGINAL (denormalizer IS expected to override)
     *
     * @dataProvider providerTestFormatAgnosticNormalizers
     */
    public function testFormatAgnosticNormalizers($test_module, $expected_value_jsonapi_normalization, $expected_value_jsonapi_denormalization) : void {
        assert(in_array($expected_value_jsonapi_normalization, [
            static::VALUE_ORIGINAL,
            static::VALUE_OVERRIDDEN,
        ], TRUE));
        assert(in_array($expected_value_jsonapi_denormalization, [
            static::VALUE_ORIGINAL,
            static::VALUE_OVERRIDDEN,
        ], TRUE));
        // Asserts the entity contains the value we set.
        $this->assertSame(static::VALUE_ORIGINAL, $this->entity->field_test->value);
        // Asserts normalizing the entity using core's 'serializer' service DOES
        // yield the value we set.
        $core_normalization = $this->container
            ->get('serializer')
            ->normalize($this->entity);
        $this->assertSame(static::VALUE_ORIGINAL, $core_normalization['field_test'][0]['value']);
        // Asserts denormalizing the entity using core's 'serializer' service DOES
        // yield the value we set.
        $core_normalization['field_test'][0]['value'] = static::VALUE_OVERRIDDEN;
        $denormalized_entity = $this->container
            ->get('serializer')
            ->denormalize($core_normalization, EntityTest::class, 'json', []);
        $this->assertInstanceOf(EntityTest::class, $denormalized_entity);
        $this->assertSame(static::VALUE_OVERRIDDEN, $denormalized_entity->field_test->value);
        // Install test module that contains a high-priority alternative normalizer.
        $this->container
            ->get('module_installer')
            ->install([
            $test_module,
        ]);
        $this->rebuildContainer();
        // Asserts normalizing the entity using core's 'serializer' service DOES NOT
        // ANYMORE yield the value we set.
        $core_normalization = $this->container
            ->get('serializer')
            ->normalize($this->entity);
        $this->assertSame(static::VALUE_OVERRIDDEN, $core_normalization['field_test'][0]['value']);
        // Asserts denormalizing the entity using core's 'serializer' service DOES
        // NOT ANYMORE yield the value we set.
        $core_normalization = $this->container
            ->get('serializer')
            ->normalize($this->entity);
        $core_normalization['field_test'][0]['value'] = static::VALUE_OVERRIDDEN;
        $denormalized_entity = $this->container
            ->get('serializer')
            ->denormalize($core_normalization, EntityTest::class, 'json', []);
        $this->assertInstanceOf(EntityTest::class, $denormalized_entity);
        $this->assertSame(static::VALUE_ORIGINAL, $denormalized_entity->field_test->value);
        // Asserts the expected JSON:API normalization.
        // @todo Remove line below in favor of commented line in https://www.drupal.org/project/drupal/issues/2878463.
        $url = Url::fromRoute('jsonapi.entity_test--entity_test.individual', [
            'entity' => $this->entity
                ->uuid(),
        ]);
        // $url = $this->entity->toUrl('jsonapi');
        $client = $this->getSession()
            ->getDriver()
            ->getClient()
            ->getClient();
        $response = $client->request('GET', $url->setAbsolute(TRUE)
            ->toString());
        $document = $this->getDocumentFromResponse($response);
        $this->assertSame($expected_value_jsonapi_normalization, $document['data']['attributes']['field_test']);
        // Asserts the expected JSON:API denormalization.
        $request_options = [];
        $request_options[RequestOptions::BODY] = Json::encode([
            'data' => [
                'type' => 'entity_test--entity_test',
                'attributes' => [
                    'field_test' => static::VALUE_OVERRIDDEN,
                ],
            ],
        ]);
        $request_options[RequestOptions::HEADERS]['Content-Type'] = 'application/vnd.api+json';
        $response = $client->request('POST', Url::fromRoute('jsonapi.entity_test--entity_test.collection.post')->setAbsolute(TRUE)
            ->toString(), $request_options);
        $document = $this->getDocumentFromResponse($response);
        $this->assertSame(static::VALUE_OVERRIDDEN, $document['data']['attributes']['field_test']);
        $entity_type_manager = $this->container
            ->get('entity_type.manager');
        $uuid_key = $entity_type_manager->getDefinition('entity_test')
            ->getKey('uuid');
        $entities = $entity_type_manager->getStorage('entity_test')
            ->loadByProperties([
            $uuid_key => $document['data']['id'],
        ]);
        $created_entity = reset($entities);
        $this->assertSame($expected_value_jsonapi_denormalization, $created_entity->field_test->value);
    }
    
    /**
     * Data provider.
     *
     * @return array
     *   Test cases.
     */
    public static function providerTestFormatAgnosticNormalizers() {
        return [
            'Format-agnostic @FieldType-level normalizers SHOULD NOT be able to affect the JSON:API normalization' => [
                'jsonapi_test_field_type',
                // \Drupal\jsonapi_test_field_type\Normalizer\StringNormalizer::normalize()
static::VALUE_ORIGINAL,
                // \Drupal\jsonapi_test_field_type\Normalizer\StringNormalizer::denormalize()
static::VALUE_OVERRIDDEN,
            ],
            'Format-agnostic @DataType-level normalizers SHOULD be able to affect the JSON:API normalization' => [
                'jsonapi_test_data_type',
                // \Drupal\jsonapi_test_data_type\Normalizer\StringNormalizer::normalize()
static::VALUE_OVERRIDDEN,
                // \Drupal\jsonapi_test_data_type\Normalizer\StringNormalizer::denormalize()
static::VALUE_ORIGINAL,
            ],
        ];
    }

}