Prado\Web\THttpResponse::write PHP Method

    public function write($str)
    {
        // when starting output make sure we send the headers first
        if (!$this->_bufferOutput and !$this->_httpHeaderSent) {
            $this->ensureHeadersSent();
        }
        echo $str;
    }

 public function testWrite()
 {
     $response = new THttpResponse();
     //self::expectOutputString("test string");
     $response->write("test string");
     self::assertContains('test string', ob_get_clean());
 }