public function testGetLinkHref()
{
$xml = $this->getSimpleXMLElement("worksheet");
$expected = "https://spreadsheets.google.com/feeds/worksheets/tA3TdJ0RIVEem3xQZhG2Ceg/private/full/od8";
$actual = Util::getLinkHref($xml, "self");
$this->assertEquals($expected, $actual);
}