public function testGuid()
{
$guid = Util::guid();
// ensure proper length
$this->assertEquals(36, strlen($guid));
// Make sure in proper format
$guid = explode('-', $guid);
$this->assertEquals(8, strlen($guid[0]));
$this->assertEquals(4, strlen($guid[1]));
$this->assertEquals(4, strlen($guid[2]));
$this->assertEquals(4, strlen($guid[3]));
$this->assertEquals(12, strlen($guid[4]));
}