/**
  * @param string $option_name
  * @param string $expected
  * @return void
  */
 private function run_webmaster_tools_authentication_option_test($option_name, $expected)
 {
     self::$class_instance->options[$option_name] = $option_name;
     $this->expectOutput($expected, self::$class_instance->webmaster_tools_authentication());
     self::$class_instance->options[$option_name] = '';
 }