public function testExtractEndpoint()
{
$url = "https://spreadsheets.google.com/feeds/worksheets/tA3TdJ0RIVEem3xQZhG2Ceg/private/full/od8";
$expected = "/feeds/worksheets/tA3TdJ0RIVEem3xQZhG2Ceg/private/full/od8";
$actual = Util::extractEndpoint($url);
$this->assertEquals($expected, $actual);
}