// \Drupal\file\Plugin\Field\FieldWidget\FileWidget::process().
$text_file = current($this->getTestFiles('text'));
$edit = [
- 'files[test_file_0]' => drupal_realpath($text_file->uri)
+ 'files[test_file_0]' => \Drupal::service('file_system')->realpath($text_file->uri)
];
$assert_session->elementNotExists('css', 'input#edit-test-file-0-remove-button');
$this->drupalPostForm(NULL, $edit, 'Upload');