class TranslationWebTest

class TranslationWebTest extends FieldTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  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();
    $this->fieldName = mb_strtolower($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() {
    $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();
    $entity = $this->container
      ->get('entity_type.manager')
      ->getStorage($this->entityTypeId)
      ->loadRevision($revision_id);
    foreach ($available_langcodes as $langcode => $value) {
      $passed = $entity->getTranslation($langcode)->{$field_name}->value == $value + 1;
      $this->assertTrue($passed, new FormattableMarkup('The @language translation for revision @revision was correctly stored', [
        '@language' => $langcode,
        '@revision' => $entity->getRevisionId(),
      ]));
    }
  }

}