True but it is only going to be useful if every lab test comes out the same if they are all over the place like they are today you can just get an idea unless the tests are 100% or at least 95% accurate you can't trust any of them. The day will come hopefully sooner than later so get out and vote for Bernie Sanders!!! Once federally legal this grey market testing will be a thing for the history books.
Also you can send in to have weed tested from an illegal state and will post online but it costs a lot more than a pack of seeds and the tried and true puff test.
Bernie has absolutely zero chance of ever becoming president......even most of the Dem's don't want him. In the long run, it's just a wasted vote.