system_test_filetransfer_info in drupal-7.x/modules/simpletest/tests/system_test.module

Implements hook_filetransfer_info().

class SystemTestFileTransfer {
  public static function factory() {
    return new SystemTestFileTransfer;
  }

  public function getSettingsForm() {
    $form = array();
    $form['system_test_username'] = array(
      '#type' => 'textfield',
      '#title' => t('System Test Username'),
    );
    return $form;
  }
}