Urine drug testing allows for a longer window of detection of drug use than Oral Fluid drug testing. Urine drug testing is well established, with the first Australian Standard being released back in 1995.
Urine testing is extremely popular for pre-employment testing and is also used in health care centres and heavy industry such as mining.
Unfortunately, urine testing does have several downsides including the need for bathroom facilities, the risk of sample adulteration (as collection is not observed) and the fact that someone who has recently smoked cannabis for example may test negative on a urine drug test shortly after as it has not reached their urinary tract yet.