California is not a test case.
Massachusetts and Maine also have plans to allow recreational use in 2018.
Oregon, Alaska, Nevada, Colorado, Washington (state), and Washington DC already allow recreational use of marijuana.
Colorado lead the way, allowing it in 2012.
How about that? Washington DC, the jurisdiction that is Constitutionally overseen by Congress, allows recreational use of a federally illegal substance.
Personally, I think it's a good thing.
I have a friend who is too poor for good health insurance, and the doctors at the clinic she goes to won't prescribe her any painkillers. Even though she has multiple health issues that cause her a LOT of pain. So when WA allowed recreational use, she started taking CBD (a hemp oil product) to help her pain ... and it generally works, though not always.