class TranslationWebTest

class TranslationWebTest extends FieldTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'language',
        'field_test',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * 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 $entityTypeId = 'entity_test_mulrev';
    
    /**
     * 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->fieldName = $this->randomMachineName() . '_field_name';
        $field_storage = [
            'field_name' => $this->fieldName,
            'entity_type' => $this->entityTypeId,
            'type' => 'test_field',
            'cardinality' => 4,
        ];
        FieldStorageConfig::create($field_storage)->save();
        $this->fieldStorage = FieldStorageConfig::load($this->entityTypeId . '.' . $this->fieldName);
        $field = [
            'field_storage' => $this->fieldStorage,
            'bundle' => $this->entityTypeId,
        ];
        FieldConfig::create($field)->save();
        $this->field = FieldConfig::load($this->entityTypeId . '.' . $field['bundle'] . '.' . $this->fieldName);
        \Drupal::service('entity_display.repository')->getFormDisplay($this->entityTypeId, $this->entityTypeId)
            ->setComponent($this->fieldName)
            ->save();
        for ($i = 0; $i < 3; ++$i) {
            ConfigurableLanguage::create([
                'id' => 'l' . $i,
                'label' => $this->randomString(),
            ])
                ->save();
        }
    }
    
    /**
     * Tests field translations when creating a new revision.
     */
    public function testFieldFormTranslationRevisions() : void {
        $web_user = $this->drupalCreateUser([
            'view test entity',
            'administer entity_test content',
        ]);
        $this->drupalLogin($web_user);
        // Prepare the field translations.
        field_test_entity_info_translatable($this->entityTypeId, TRUE);
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($this->entityTypeId)
            ->create();
        $available_langcodes = array_flip(array_keys($this->container
            ->get('language_manager')
            ->getLanguages()));
        $field_name = $this->fieldStorage
            ->getName();
        // Store the field translations.
        ksort($available_langcodes);
        $entity->langcode->value = key($available_langcodes);
        foreach ($available_langcodes as $langcode => $value) {
            $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
            $translation->{$field_name}->value = $value + 1;
        }
        $entity->save();
        // Create a new revision.
        $edit = [
            "{$field_name}[0][value]" => $entity->{$field_name}->value,
            'revision' => TRUE,
        ];
        $this->drupalGet($this->entityTypeId . '/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        // Check translation revisions.
        $this->checkTranslationRevisions($entity->id(), $entity->getRevisionId(), $available_langcodes);
        $this->checkTranslationRevisions($entity->id(), $entity->getRevisionId() + 1, $available_langcodes);
    }
    
    /**
     * Tests translation revisions.
     *
     * Check if the field translation attached to the entity revision identified
     * by the passed arguments were correctly stored.
     */
    private function checkTranslationRevisions($id, $revision_id, $available_langcodes) {
        $field_name = $this->fieldStorage
            ->getName();
        
        /** @var \Drupal\Core\Entity\RevisionableStorageInterface $storage */
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($this->entityTypeId);
        $entity = $storage->loadRevision($revision_id);
        foreach ($available_langcodes as $langcode => $value) {
            $passed = $entity->getTranslation($langcode)->{$field_name}->value == $value + 1;
            $this->assertTrue($passed, "The {$langcode} translation for revision {$entity->getRevisionId()} was correctly stored");
        }
    }

}