Testnet is under stress testing?

[amaclin1]

Bitcoin testnet3 looks strange nowadays. I am trying to investigate what is going on.
My first question is: how to get the hashpower?

Code:

getnetworkhashps
448 771 294 947 646.9

Am I right that this value is ~450 TH/s or in other words ~32 Antminer S9

[amaclin1]

It should be true and according to the documentation[1], it also say same thing. But there's no correlation between hashrate and stress testing since all you need to do are generate and broadcast lots of transaction.

Stress-testing is very wide term 
I see now a lot of transactions and too big (in my opinion) hashrate.
I haven't analyzed yet the blocks and transactions themselves.