Got a compressor yeah, How do i test it? Not much cop with this type of stuff.
Do a bit of searching on here pal, basically you block off the boost tract at various points and pressurise it, any leakage you will hear/see ( if you are a tart like me and go round each joint with gas detector

)
Wouldnt reccommend it though if you not confident, even at "low" pressures, you could damage the car or yourself if you dont do things correctly.