There is no such test as 'the A1 test'
A1 refers to the pass level required of the Common European Framework of Reference

From the UKBA website:-

"In the test, you will need to demonstrate a basic command of English (speaking and listening)
at level A1 of the Common European Framework of Reference. This is a basic level, which
is judged to require 40 to 50 hours' tuition for most learners. Someone assessed at
level A1 can understand and use simple, everyday expressions and very basic phrases.

You will not need to demonstrate your reading and writing skills."

Guidance for Applicants on English Language Requirements is here:-
http://www.ukvisas.gov.uk/resources/...angrequirement
This is a very interesting FAQ document, well worth the few minutes of reading to both new
visa applicants and UK based FLR and ILR applicants.

Wikipedia has a very good description of the different levels here:-

http://en.wikipedia.org/wiki/Common_..._for_Languages

I realise it's a lot of reading, but hopefully it can explain a lot and be helpful.
This is a really important test now for anyone who will apply for settlement visia's