public function testUUID()
{
$uuids = array();
for ($i = 0; $i < 10000; $i++) {
$uuid = $this->db->uuid();
$this->assertTrue((bool) preg_match('#[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[8,9,a,b][0-9a-f]{3}-[0-9a-f]{12}#', $uuid));
$uuids[] = $uuid;
}
$uuids = array_unique($uuids);
$this->assertEquals(count($uuids), 10000);
}
