class TranslationTest

class TranslationTest extends FieldKernelTestBase {
    
    /**
     * Modules to install.
     *
     * The node module is required because the tests alter the node entity type.
     *
     * @var array
     */
    protected static $modules = [
        'language',
        'node',
    ];
    
    /**
     * The name of the field to use in this test.
     *
     * @var string
     */
    protected $fieldName;
    
    /**
     * The name of the entity type to use in this test.
     *
     * @var string
     */
    protected $entityType = 'test_entity';
    
    /**
     * An array defining the field storage to use in this test.
     *
     * @var array
     */
    protected $fieldStorageDefinition;
    
    /**
     * An array defining the field to use in this test.
     *
     * @var array
     */
    protected $fieldDefinition;
    
    /**
     * The field storage to use in this test.
     *
     * @var \Drupal\field\Entity\FieldStorageConfig
     */
    protected $fieldStorage;
    
    /**
     * The field to use in this test.
     *
     * @var \Drupal\field\Entity\FieldConfig
     */
    protected $field;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('node');
        $this->installConfig([
            'language',
        ]);
        $this->fieldName = $this->randomMachineName();
        $this->entityType = 'entity_test';
        $this->fieldStorageDefinition = [
            'field_name' => $this->fieldName,
            'entity_type' => $this->entityType,
            'type' => 'test_field',
            'cardinality' => 4,
        ];
        $this->fieldStorage = FieldStorageConfig::create($this->fieldStorageDefinition);
        $this->fieldStorage
            ->save();
        $this->fieldDefinition = [
            'field_storage' => $this->fieldStorage,
            'bundle' => 'entity_test',
        ];
        $this->field = FieldConfig::create($this->fieldDefinition);
        $this->field
            ->save();
        for ($i = 0; $i < 3; ++$i) {
            ConfigurableLanguage::create([
                'id' => 'l' . $i,
                'label' => $this->randomString(),
            ])
                ->save();
        }
    }
    
    /**
     * Tests translatable fields storage/retrieval.
     */
    public function testTranslatableFieldSaveLoad() : void {
        // Enable field translations for nodes.
        field_test_entity_info_translatable('node', TRUE);
        $entity_type = \Drupal::entityTypeManager()->getDefinition('node');
        $this->assertTrue($entity_type->isTranslatable(), 'Nodes are translatable.');
        // Prepare the field translations.
        $entity_type_id = 'entity_test';
        field_test_entity_info_translatable($entity_type_id, TRUE);
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type_id)
            ->create([
            'type' => $this->field
                ->getTargetBundle(),
        ]);
        $field_translations = [];
        $available_langcodes = array_keys($this->container
            ->get('language_manager')
            ->getLanguages());
        $entity->langcode->value = reset($available_langcodes);
        foreach ($available_langcodes as $langcode) {
            $field_translations[$langcode] = $this->_generateTestFieldValues($this->fieldStorage
                ->getCardinality());
            $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
            $translation->{$this->fieldName}
                ->setValue($field_translations[$langcode]);
        }
        // Save and reload the field translations.
        $entity = $this->entitySaveReload($entity);
        // Check if the correct values were saved/loaded.
        foreach ($field_translations as $langcode => $items) {
            $result = TRUE;
            foreach ($items as $delta => $item) {
                $result = $result && $item['value'] == $entity->getTranslation($langcode)->{$this->fieldName}[$delta]->value;
            }
            $this->assertTrue($result, "{$langcode} translation correctly handled.");
        }
        // Test default values.
        $field_name_default = $this->randomMachineName() . '_field_name';
        $field_storage_definition = $this->fieldStorageDefinition;
        $field_storage_definition['field_name'] = $field_name_default;
        $field_storage = FieldStorageConfig::create($field_storage_definition);
        $field_storage->save();
        $field_definition = $this->fieldDefinition;
        $field_definition['field_storage'] = $field_storage;
        $field_definition['default_value'] = [
            [
                'value' => rand(1, 127),
            ],
        ];
        $field = FieldConfig::create($field_definition);
        $field->save();
        $translation_langcodes = array_slice($available_langcodes, 0, 2);
        asort($translation_langcodes);
        $translation_langcodes = array_values($translation_langcodes);
        $values = [
            'type' => $field->getTargetBundle(),
            'langcode' => $translation_langcodes[0],
        ];
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type_id)
            ->create($values);
        foreach ($translation_langcodes as $langcode) {
            $values[$this->fieldName][$langcode] = $this->_generateTestFieldValues($this->fieldStorage
                ->getCardinality());
            $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
            $translation->{$this->fieldName}
                ->setValue($values[$this->fieldName][$langcode]);
        }
        $field_langcodes = array_keys($entity->getTranslationLanguages());
        sort($field_langcodes);
        $this->assertEquals($translation_langcodes, $field_langcodes, 'Missing translations did not get a default value.');
        // @todo Test every translation once the Entity Translation API allows for
        //   multilingual defaults.
        $langcode = $entity->language()
            ->getId();
        $this->assertEquals($field->getDefaultValueLiteral(), $entity->getTranslation($langcode)->{$field_name_default}
            ->getValue(), "Default value correctly populated for language {$langcode}.");
        $storage = \Drupal::entityTypeManager()->getStorage($entity_type_id);
        // Check that explicit empty values are not overridden with default values.
        foreach ([
            NULL,
            [],
        ] as $empty_items) {
            $values = [
                'type' => $field->getTargetBundle(),
                'langcode' => $translation_langcodes[0],
            ];
            $entity = $storage->create($values);
            foreach ($translation_langcodes as $langcode) {
                $values[$this->fieldName][$langcode] = $this->_generateTestFieldValues($this->fieldStorage
                    ->getCardinality());
                $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
                $translation->{$this->fieldName}
                    ->setValue($values[$this->fieldName][$langcode]);
                $translation->{$field_name_default}
                    ->setValue($empty_items);
                $values[$field_name_default][$langcode] = $empty_items;
            }
            foreach ($entity->getTranslationLanguages() as $langcode => $language) {
                $this->assertEquals([], $entity->getTranslation($langcode)->{$field_name_default}
                    ->getValue(), "Empty value correctly populated for language {$langcode}.");
            }
        }
    }
    
    /**
     * Tests field access.
     *
     * Regression test to verify that fieldAccess() can be called while only
     * passing the required parameters.
     *
     * @see https://www.drupal.org/node/2404739
     */
    public function testFieldAccess() : void {
        $access_control_handler = \Drupal::entityTypeManager()->getAccessControlHandler($this->entityType);
        $this->assertTrue($access_control_handler->fieldAccess('view', $this->field));
    }

}