public function testXSDDateTime()
{
$time = 1449479356;
$datetime = '2015-12-07T10:09:16+01:00';
//$this->assertEquals(false, XSDDateTime::validateXSDDateTime($impossible));
$this->assertEquals(true, XSDDateTime::validateXSDDateTime($datetime));
$this->assertEquals($datetime, XSDDateTime::getXSDDateTime($time));
$this->assertEquals($time, XSDDateTime::getUnixTimestamp($datetime));
}