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If you have to ask that question I think you need to learn some basic electrical knowledge before working with high voltages and the availability of high currents. Start off learning using batteries and small bulbs until you fully understand about measuring voltage and current.
There could be a bit of semantic differential, otherwise known as bad terminology going on here.
Given the OPs obvious lack of knowledge and experience in this area, could it be that the expression "testing a a.c. socket for current" really means "testing that it is live", ie that there is voltage available at the socket.
The word "current" is often used as a laymans term to describe any electrical characteristic.
With that thought in mind I say "If you don't know what you are doing, don't do it".