Prado\Web\THttpResponse::setBufferOutput PHP Метод

    public function setBufferOutput($value)
    {
        if ($this->_initialized) {
            throw new TInvalidOperationException('httpresponse_bufferoutput_unchangeable');
        } else {
            $this->_bufferOutput = TPropertyValue::ensureBoolean($value);
        }
    }

 public function testWriteFile()
 {
     // Don't know how to test headers :(( ...
     throw new PHPUnit_Framework_IncompleteTestError();
     $response = new THttpResponse();
     $response->setBufferOutput(true);
     // Suppress warning with headers
     $response->writeFile(dirname(__FILE__) . '/data/aTarFile.md5', null, 'text/plain', array('Pragma: public', 'Expires: 0'));
     self::assertContains('4b1ecb0b243918a8bbfbb4515937be98  aTarFile.tar', ob_get_clean());
 }