class ImageFieldValidateTest

class ImageFieldValidateTest extends ImageFieldTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests the validation message is displayed only once for ajax uploads.
   */
  public function testAJAXValidationMessage() {
    $field_name = strtolower($this->randomMachineName());
    $this->createImageField($field_name, 'article', [
      'cardinality' => -1,
    ]);
    $this->drupalGet('node/add/article');
    /** @var \Drupal\file\FileInterface[] $text_files */
    $text_files = $this->drupalGetTestFiles('text');
    $text_file = reset($text_files);
    $field = $this->getSession()
      ->getPage()
      ->findField('files[' . $field_name . '_0][]');
    $field->attachFile($this->container
      ->get('file_system')
      ->realpath($text_file->uri));
    $this->assertSession()
      ->waitForElement('css', '.messages--error');
    // Verify that Ajax validation messages are displayed only once.
    $this->assertSession()
      ->elementsCount('xpath', '//div[contains(@class, "messages--error")]', 1);
  }
  
  /**
   * Tests that image field validation works with other form submit handlers.
   */
  public function testFriendlyAjaxValidation() {
    // Add a custom field to the Article content type that contains an AJAX
    // handler on a select field.
    $field_storage = FieldStorageConfig::create([
      'field_name' => 'field_dummy_select',
      'type' => 'image_module_test_dummy_ajax',
      'entity_type' => 'node',
      'cardinality' => 1,
    ]);
    $field_storage->save();
    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'entity_type' => 'node',
      'bundle' => 'article',
      'field_name' => 'field_dummy_select',
      'label' => 'Dummy select',
    ])->save();
    \Drupal::entityTypeManager()->getStorage('entity_form_display')
      ->load('node.article.default')
      ->setComponent('field_dummy_select', [
      'type' => 'image_module_test_dummy_ajax_widget',
      'weight' => 1,
    ])
      ->save();
    // Then, add an image field.
    $this->createImageField('field_dummy_image', 'article');
    // Open an article and trigger the AJAX handler.
    $this->drupalGet('node/add/article');
    $id = $this->getSession()
      ->getPage()
      ->find('css', '[name="form_build_id"]')
      ->getValue();
    $field = $this->getSession()
      ->getPage()
      ->findField('field_dummy_select[select_widget]');
    $field->setValue('bam');
    // Make sure that the operation did not end with an exception.
    $this->assertSession()
      ->waitForElement('css', "[name='form_build_id']:not([value='{$id}'])");
  }

}