What do you mean by testing an address? Why would you need to "test" it?
It has been speculated by many that MtGox lost the private keys to their cold cold storage wallets because of a bug in their key generation software.
Before putting 10,000 BTC in an address, I would want to check to make sure the private key really works for that address. Wouldn't you?
I would send 1btc to see if everything is fine, isn't enough?
I am in the process of creating a paper wallet so I am interested by all problems associated with paper wallets, I am reluctant to use bitaddress so I think I will try to use Bitcoin-qt to create my paper wallet and I will store it in a safe in Singapore