Add some specs for the argument error in the constructor
Add some specs for the argument error in the constructor

Signed-off-by: Sam Phippen <e5a09176608998a68778e11d5021c871e8fae93c@googlemail.com>

httprb/http.rb,pezra/http.rb,sferik/http,davidbegin/http,moneyadviceservice/http.rb,httprb/http,Connorhd/http.rb