A "test" that specifically targets two projects that promote anti-censorship. Yeah, that's some "test"...
There's a MITM injecting malicious javascript causing a prolonged DDoS for several days now. There have been times in the past where BGP "misconfigurations" have redirected large amounts of internet traffic, and we used to think, oh, Hanlon's razor, now we know better.
What convinces me this is not Hanlon is the precisely targeted nature and significant duration of the attack. Whoever controls these servers and routers knows this is happening and wants it to happen.
Edit: and this post adds even more doubt: https://news.ycombinator.com/item?id=9285343. There's no clear reason why the PRC's first move would be to turn toward DDOS. As other people have written, it's way too powerful of a weapon for them to use it on something so foolish. Keeping an open mind on this one.