Can ecstasy show up on a swab test? How long do you have to wait after taking X to pass a swab test?

My friend is a a real tab freak and pops ecstasy all the time. But he has to pass a drug test. How long should he wait?
X isn't addictive. And he is stopping. He's just trying to get a job.

: http://alcoholdrugstreatment.info/can-ecstasy-show-up-on-a-swab-test-how-long-do-you-have-to-wait-after-taking-x-to-pass-a-swab-test