The way you phrased this question makes it rather general. Drug tests range in what they test for. They have tests that look specifically for marijuana, or ones that look specifically for cocaine and ecstasy. There are a myriad of possibilities on what different drug tests can test for. Most commonly, if you are referring to being tested for probation, a multi-screen drug test is used which tests your urine for traces of THC (marijuana), Cocaine, Methamphetamine, Opiates (Heroin, Morphine, Oxycotton, Suboxone, etc.), PCP, and sometimes Barbiturates. The answer to your question is simply dependent upon who is giving you a test (whether it be your parents, doctor, or officer).
just the common drugs-like weed and herion or crystal meth
Weed meth cocaine ruphies why what drugs you been doing
It's not a drug that drug tests typically check for.
drug tests don't test for mushrooms
urine tests, blood tests and hair tests.
Ativan (Lorazepam) is a benzodiazepine drug and standard drug tests such as the SAHMSA-5 typically do not test for benzodiazepines. At the request of the institution administering the drug test the laboratory CAN test for benzodiazepines. In summary it depends on which drug test you are taking; however basic tests do not usually include Ativan.
Standard drug tests do not detect bath salts, but there are custom drug tests that can detect them.
Drug tests can not differentiate the means of taking a drug.
Yes.
Yes, they will give you a drug test. Any law enforcement position causes for a drug test. Most of these tests are unannounced.
Any one that is being tested for. There's no such thing as "a" drug test; there are many different drug tests, each of which tests for a particular drug or family of drugs. Most "drug tests" include several different tests, commonly 5 or more.
Drug tests are not easy to fool.
all drug tests will detect fetanyl.
No. standard drug tests do not test for anabolic steroids. If someone wants to test you for steroids, they need to give you a specialized (and expensive) anabolic steroids test. I know this because I am in the military and have weekly drug tests and know several people injecting