Google\Spreadsheet\Spreadsheet::getWorksheetsFeedUrl PHP Method

    public function getWorksheetsFeedUrl()
    {
        return Util::getLinkHref($this->xml, self::REL_WORKSHEETS_FEED);
    }

 public function testGetWorksheetsFeedUrl()
 {
     $spreadsheet = new Spreadsheet($this->getSimpleXMLElement("spreadsheet"));
     $this->assertEquals("https://spreadsheets.google.com/feeds/worksheets/tFEgU8ywJkkjcZjG/private/full", $spreadsheet->getWorksheetsFeedUrl());
 }